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Received frame from QMC contains the CRC.
Upper layers don't need this CRC and tcpdump mentioned trailing junk
data due to this CRC presence.
As some other HDLC driver, simply discard this CRC.
Fixes: d0f2258e79fd ("net: wan: Add support for QMC HDLC")
Cc: stable@vger.kernel.org
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240730063133.179598-1-herve.codina@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The carrier_lock spinlock protects the carrier detection. While it is
held, framer_get_status() is called which in turn takes a mutex.
This is not correct and can lead to a deadlock.
A run with PROVE_LOCKING enabled detected the issue:
[ BUG: Invalid wait context ]
...
c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78
other info that might help us debug this:
context-{4:4}
2 locks held by ifconfig/146:
#0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664
#1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98
Avoid the spinlock usage and convert carrier_lock to a mutex.
Fixes: 54762918ca85 ("net: wan: fsl_qmc_hdlc: Add framer support")
Cc: stable@vger.kernel.org
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240730063104.179553-1-herve.codina@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Tariq Toukan says:
====================
mlx5 misc fixes 2024-07-30
This patchset provides misc bug fixes from the team to the mlx5 core and
Eth drivers.
====================
Link: https://patch.msgid.link/20240730061638.1831002-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Since the documentation for mlx5_toggle_port_link states that it should
only be used after setting the port register, we add a check for the
return value from mlx5_port_set_eth_ptys to ensure the register was
successfully set before calling it.
Fixes: 667daedaecd1 ("net/mlx5e: Toggle link only after modifying port parameters")
Signed-off-by: Shahar Shitrit <shshitrit@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-9-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The cited commit allocates a new modify header to replace the old
one when updating CT entry. But if failed to allocate a new one, eg.
exceed the max number firmware can support, modify header will be
an error pointer that will trigger a panic when deallocating it. And
the old modify header point is copied to old attr. When the old
attr is freed, the old modify header is lost.
Fix it by restoring the old attr to attr when failed to allocate a
new modify header context. So when the CT entry is freed, the right
modify header context will be freed. And the panic of accessing
error pointer is also fixed.
Fixes: 94ceffb48eac ("net/mlx5e: Implement CT entry update")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-8-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Require mlx5 classifier action support when creating IPSec chains in
offload path. MLX5_IPSEC_CAP_PRIO should only be set if CONFIG_MLX5_CLS_ACT
is enabled. If CONFIG_MLX5_CLS_ACT=n and MLX5_IPSEC_CAP_PRIO is set,
configuring IPsec offload will fail due to the mlxx5 ipsec chain rules
failing to be created due to lack of classifier action support.
Fixes: fa5aa2f89073 ("net/mlx5e: Use chains for IPsec policy priority offload")
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-7-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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On sync reset reload work, when remote host updates devlink on reload
actions performed on that host, it misses taking devlink lock before
calling devlink_remote_reload_actions_performed() which results in
triggering lock assert like the following:
WARNING: CPU: 4 PID: 1164 at net/devlink/core.c:261 devl_assert_locked+0x3e/0x50
…
CPU: 4 PID: 1164 Comm: kworker/u96:6 Tainted: G S W 6.10.0-rc2+ #116
Hardware name: Supermicro SYS-2028TP-DECTR/X10DRT-PT, BIOS 2.0 12/18/2015
Workqueue: mlx5_fw_reset_events mlx5_sync_reset_reload_work [mlx5_core]
RIP: 0010:devl_assert_locked+0x3e/0x50
…
Call Trace:
<TASK>
? __warn+0xa4/0x210
? devl_assert_locked+0x3e/0x50
? report_bug+0x160/0x280
? handle_bug+0x3f/0x80
? exc_invalid_op+0x17/0x40
? asm_exc_invalid_op+0x1a/0x20
? devl_assert_locked+0x3e/0x50
devlink_notify+0x88/0x2b0
? mlx5_attach_device+0x20c/0x230 [mlx5_core]
? __pfx_devlink_notify+0x10/0x10
? process_one_work+0x4b6/0xbb0
process_one_work+0x4b6/0xbb0
[…]
Fixes: 84a433a40d0e ("net/mlx5: Lock mlx5 devlink reload callbacks")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-6-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The cited commit didn't change the body of the loop as it should.
It shouldn't be using MLX5_LAG_P1.
Fixes: 7e978e7714d6 ("net/mlx5: Lag, use actual number of lag ports")
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-5-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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This patch reduces the size of hw_ste_arr_optimized array that is
allocated on stack from 640 bytes (5 match STEs + 5 action STES)
to 448 bytes (2 match STEs + 5 action STES).
This fixes the 'stack guard page was hit' issue, while still fitting
majority of the usecases (up to 2 match STEs).
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-4-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In case mlx5_irq_alloc fails, the previously allocated index remains
in the XArray, which could lead to inconsistencies.
Fix it by adding error handling that erases the allocated index
from the XArray if mlx5_irq_alloc returns an error.
Fixes: c36326d38d93 ("net/mlx5: Round-Robin EQs over IRQs")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Maher Sanalla <msanalla@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-3-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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There is no point in recovery during device shutdown. if health
work started need to wait for it to avoid races and NULL pointer
access.
Hence, drain health WQ on shutdown callback.
Fixes: 1958fc2f0712 ("net/mlx5: SF, Add auxiliary device driver")
Fixes: d2aa060d40fa ("net/mlx5: Cancel health poll before sending panic teardown command")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240730061638.1831002-2-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The network maintainers need to be copied if the skbuff.h is touched.
This also helps git-send-email to figure out the proper maintainers when
touching the file.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240730161404.2028175-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The skb isn't consumed in case of NETDEV_TX_BUSY, therefore don't
increment the tx_dropped counter.
Fixes: 188f4af04618 ("r8169: use NETDEV_TX_{BUSY/OK}")
Cc: stable@vger.kernel.org
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/bbba9c48-8bac-4932-9aa1-d2ed63bc9433@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Daniel Borkmann says:
====================
pull-request: bpf 2024-07-31
We've added 2 non-merge commits during the last 2 day(s) which contain
a total of 2 files changed, 2 insertions(+), 2 deletions(-).
The main changes are:
1) Fix BPF selftest build after tree sync with regards to a _GNU_SOURCE
macro redefined compilation error, from Stanislav Fomichev.
2) Fix a wrong test in the ASSERT_OK() check in uprobe_syscall BPF selftest,
from Jiri Olsa.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
bpf/selftests: Fix ASSERT_OK condition check in uprobe_syscall test
selftests/bpf: Filter out _GNU_SOURCE when compiling test_cpp
====================
Link: https://patch.msgid.link/20240731115706.19677-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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ip6table_nat_table_init() accesses net->gen->ptr[ip6table_nat_net_ops.id],
but the function is exposed to user space before the entry is allocated
via register_pernet_subsys().
Let's call register_pernet_subsys() before xt_register_template().
Fixes: fdacd57c79b7 ("netfilter: x_tables: never register tables by default")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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We had a report that iptables-restore sometimes triggered null-ptr-deref
at boot time. [0]
The problem is that iptable_nat_table_init() is exposed to user space
before the kernel fully initialises netns.
In the small race window, a user could call iptable_nat_table_init()
that accesses net_generic(net, iptable_nat_net_id), which is available
only after registering iptable_nat_net_ops.
Let's call register_pernet_subsys() before xt_register_template().
[0]:
bpfilter: Loaded bpfilter_umh pid 11702
Started bpfilter
BUG: kernel NULL pointer dereference, address: 0000000000000013
PF: supervisor write access in kernel mode
PF: error_code(0x0002) - not-present page
PGD 0 P4D 0
PREEMPT SMP NOPTI
CPU: 2 PID: 11879 Comm: iptables-restor Not tainted 6.1.92-99.174.amzn2023.x86_64 #1
Hardware name: Amazon EC2 c6i.4xlarge/, BIOS 1.0 10/16/2017
RIP: 0010:iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat
Code: 10 4c 89 f6 48 89 ef e8 0b 19 bb ff 41 89 c4 85 c0 75 38 41 83 c7 01 49 83 c6 28 41 83 ff 04 75 dc 48 8b 44 24 08 48 8b 0c 24 <48> 89 08 4c 89 ef e8 a2 3b a2 cf 48 83 c4 10 44 89 e0 5b 5d 41 5c
RSP: 0018:ffffbef902843cd0 EFLAGS: 00010246
RAX: 0000000000000013 RBX: ffff9f4b052caa20 RCX: ffff9f4b20988d80
RDX: 0000000000000000 RSI: 0000000000000064 RDI: ffffffffc04201c0
RBP: ffff9f4b29394000 R08: ffff9f4b07f77258 R09: ffff9f4b07f77240
R10: 0000000000000000 R11: ffff9f4b09635388 R12: 0000000000000000
R13: ffff9f4b1a3c6c00 R14: ffff9f4b20988e20 R15: 0000000000000004
FS: 00007f6284340000(0000) GS:ffff9f51fe280000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000013 CR3: 00000001d10a6005 CR4: 00000000007706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
<TASK>
? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)
? show_trace_log_lvl (arch/x86/kernel/dumpstack.c:259)
? xt_find_table_lock (net/netfilter/x_tables.c:1259)
? __die_body.cold (arch/x86/kernel/dumpstack.c:478 arch/x86/kernel/dumpstack.c:420)
? page_fault_oops (arch/x86/mm/fault.c:727)
? exc_page_fault (./arch/x86/include/asm/irqflags.h:40 ./arch/x86/include/asm/irqflags.h:75 arch/x86/mm/fault.c:1470 arch/x86/mm/fault.c:1518)
? asm_exc_page_fault (./arch/x86/include/asm/idtentry.h:570)
? iptable_nat_table_init (net/ipv4/netfilter/iptable_nat.c:87 net/ipv4/netfilter/iptable_nat.c:121) iptable_nat
xt_find_table_lock (net/netfilter/x_tables.c:1259)
xt_request_find_table_lock (net/netfilter/x_tables.c:1287)
get_info (net/ipv4/netfilter/ip_tables.c:965)
? security_capable (security/security.c:809 (discriminator 13))
? ns_capable (kernel/capability.c:376 kernel/capability.c:397)
? do_ipt_get_ctl (net/ipv4/netfilter/ip_tables.c:1656)
? bpfilter_send_req (net/bpfilter/bpfilter_kern.c:52) bpfilter
nf_getsockopt (net/netfilter/nf_sockopt.c:116)
ip_getsockopt (net/ipv4/ip_sockglue.c:1827)
__sys_getsockopt (net/socket.c:2327)
__x64_sys_getsockopt (net/socket.c:2342 net/socket.c:2339 net/socket.c:2339)
do_syscall_64 (arch/x86/entry/common.c:51 arch/x86/entry/common.c:81)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
RIP: 0033:0x7f62844685ee
Code: 48 8b 0d 45 28 0f 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 0a c3 66 0f 1f 84 00 00 00 00 00 48 8b 15 09
RSP: 002b:00007ffd1f83d638 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffd1f83d680 RCX: 00007f62844685ee
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000004 R08: 00007ffd1f83d670 R09: 0000558798ffa2a0
R10: 00007ffd1f83d680 R11: 0000000000000246 R12: 00007ffd1f83e3b2
R13: 00007f628455baa0 R14: 00007ffd1f83d7b0 R15: 00007f628457a008
</TASK>
Modules linked in: iptable_nat(+) bpfilter rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache veth xt_state xt_connmark xt_nat xt_statistic xt_MASQUERADE xt_mark xt_addrtype ipt_REJECT nf_reject_ipv4 nft_chain_nat nf_nat xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_comment nft_compat nf_tables nfnetlink overlay nls_ascii nls_cp437 vfat fat ghash_clmulni_intel aesni_intel ena crypto_simd ptp cryptd i8042 pps_core serio button sunrpc sch_fq_codel configfs loop dm_mod fuse dax dmi_sysfs crc32_pclmul crc32c_intel efivarfs
CR2: 0000000000000013
Fixes: fdacd57c79b7 ("netfilter: x_tables: never register tables by default")
Reported-by: Takahiro Kawahara <takawaha@amazon.co.jp>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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David Laight pointed out that we should deal with the min3() and max3()
mess too, which still does excessive expansion.
And our current macros are actually rather broken.
In particular, the macros did this:
#define min3(x, y, z) min((typeof(x))min(x, y), z)
#define max3(x, y, z) max((typeof(x))max(x, y), z)
and that not only is a nested expansion of possibly very complex
arguments with all that involves, the typing with that "typeof()" cast
is completely wrong.
For example, imagine what happens in max3() if 'x' happens to be a
'unsigned char', but 'y' and 'z' are 'unsigned long'. The types are
compatible, and there's no warning - but the result is just random
garbage.
No, I don't think we've ever hit that issue in practice, but since we
now have sane infrastructure for doing this right, let's just use it.
It fixes any excessive expansion, and also avoids these kinds of broken
type issues.
Requested-by: David Laight <David.Laight@aculab.com>
Acked-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
- fix regression in extent map rework when handling insertion of
overlapping compressed extent
- fix unexpected file length when appending to a file using direct io
and buffer not faulted in
- in zoned mode, fix accounting of unusable space when flipping
read-only block group back to read-write
- fix page locking when COWing an inline range, assertion failure found
by syzbot
- fix calculation of space info in debugging print
- tree-checker, add validation of data reference item
- fix a few -Wmaybe-uninitialized build warnings
* tag 'for-6.11-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: initialize location to fix -Wmaybe-uninitialized in btrfs_lookup_dentry()
btrfs: fix corruption after buffer fault in during direct IO append write
btrfs: zoned: fix zone_unusable accounting on making block group read-write again
btrfs: do not subtract delalloc from avail bytes
btrfs: make cow_file_range_inline() honor locked_page on error
btrfs: fix corrupt read due to bad offset of a compressed extent map
btrfs: tree-checker: validate dref root and objectid
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git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools
Pull perf tools fixes from Namhyung Kim:
"Some more build fixes and a random crash fix:
- Fix cross-build by setting pkg-config env according to the arch
- Fix static build for missing library dependencies
- Fix Segfault when callchain has no symbols"
* tag 'perf-tools-fixes-for-v6.11-2024-07-30' of git://git.kernel.org/pub/scm/linux/kernel/git/perf/perf-tools:
perf docs: Document cross compilation
perf: build: Link lib 'zstd' for static build
perf: build: Link lib 'lzma' for static build
perf: build: Only link libebl.a for old libdw
perf: build: Set Python configuration for cross compilation
perf: build: Setup PKG_CONFIG_LIBDIR for cross compilation
perf tool: fix dereferencing NULL al->maps
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue
Tony Nguyen says:
====================
ice: fix AF_XDP ZC timeout and concurrency issues
Maciej Fijalkowski says:
Changes included in this patchset address an issue that customer has
been facing when AF_XDP ZC Tx sockets were used in combination with flow
control and regular Tx traffic.
After executing:
ethtool --set-priv-flags $dev link-down-on-close on
ethtool -A $dev rx on tx on
launching multiple ZC Tx sockets on $dev + pinging remote interface (so
that regular Tx traffic is present) and then going through down/up of
$dev, Tx timeout occurred and then most of the time ice driver was unable
to recover from that state.
These patches combined together solve the described above issue on
customer side. Main focus here is to forbid producing Tx descriptors when
either carrier is not yet initialized or process of bringing interface
down has already started.
v1: https://lore.kernel.org/netdev/20240708221416.625850-1-anthony.l.nguyen@intel.com/
* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
ice: xsk: fix txq interrupt mapping
ice: add missing WRITE_ONCE when clearing ice_rx_ring::xdp_prog
ice: improve updating ice_{t,r}x_ring::xsk_pool
ice: toggle netif_carrier when setting up XSK pool
ice: modify error handling when setting XSK pool in ndo_bpf
ice: replace synchronize_rcu with synchronize_net
ice: don't busy wait for Rx queue disable in ice_qp_dis()
ice: respect netif readiness in AF_XDP ZC related ndo's
====================
Link: https://patch.msgid.link/20240729200716.681496-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Tighten csum_start and csum_offset checks in virtio_net_hdr_to_skb
for GSO packets.
The function already checks that a checksum requested with
VIRTIO_NET_HDR_F_NEEDS_CSUM is in skb linear. But for GSO packets
this might not hold for segs after segmentation.
Syzkaller demonstrated to reach this warning in skb_checksum_help
offset = skb_checksum_start_offset(skb);
ret = -EINVAL;
if (WARN_ON_ONCE(offset >= skb_headlen(skb)))
By injecting a TSO packet:
WARNING: CPU: 1 PID: 3539 at net/core/dev.c:3284 skb_checksum_help+0x3d0/0x5b0
ip_do_fragment+0x209/0x1b20 net/ipv4/ip_output.c:774
ip_finish_output_gso net/ipv4/ip_output.c:279 [inline]
__ip_finish_output+0x2bd/0x4b0 net/ipv4/ip_output.c:301
iptunnel_xmit+0x50c/0x930 net/ipv4/ip_tunnel_core.c:82
ip_tunnel_xmit+0x2296/0x2c70 net/ipv4/ip_tunnel.c:813
__gre_xmit net/ipv4/ip_gre.c:469 [inline]
ipgre_xmit+0x759/0xa60 net/ipv4/ip_gre.c:661
__netdev_start_xmit include/linux/netdevice.h:4850 [inline]
netdev_start_xmit include/linux/netdevice.h:4864 [inline]
xmit_one net/core/dev.c:3595 [inline]
dev_hard_start_xmit+0x261/0x8c0 net/core/dev.c:3611
__dev_queue_xmit+0x1b97/0x3c90 net/core/dev.c:4261
packet_snd net/packet/af_packet.c:3073 [inline]
The geometry of the bad input packet at tcp_gso_segment:
[ 52.003050][ T8403] skb len=12202 headroom=244 headlen=12093 tailroom=0
[ 52.003050][ T8403] mac=(168,24) mac_len=24 net=(192,52) trans=244
[ 52.003050][ T8403] shinfo(txflags=0 nr_frags=1 gso(size=1552 type=3 segs=0))
[ 52.003050][ T8403] csum(0x60000c7 start=199 offset=1536
ip_summed=3 complete_sw=0 valid=0 level=0)
Mitigate with stricter input validation.
csum_offset: for GSO packets, deduce the correct value from gso_type.
This is already done for USO. Extend it to TSO. Let UFO be:
udp[46]_ufo_fragment ignores these fields and always computes the
checksum in software.
csum_start: finding the real offset requires parsing to the transport
header. Do not add a parser, use existing segmentation parsing. Thanks
to SKB_GSO_DODGY, that also catches bad packets that are hw offloaded.
Again test both TSO and USO. Do not test UFO for the above reason, and
do not test UDP tunnel offload.
GSO packet are almost always CHECKSUM_PARTIAL. USO packets may be
CHECKSUM_NONE since commit 10154dbded6d6 ("udp: Allow GSO transmit
from devices with no checksum offload"), but then still these fields
are initialized correctly in udp4_hwcsum/udp6_hwcsum_outgoing. So no
need to test for ip_summed == CHECKSUM_PARTIAL first.
This revises an existing fix mentioned in the Fixes tag, which broke
small packets with GSO offload, as detected by kselftests.
Link: https://syzkaller.appspot.com/bug?extid=e1db31216c789f552871
Link: https://lore.kernel.org/netdev/20240723223109.2196886-1-kuba@kernel.org
Fixes: e269d79c7d35 ("net: missing check virtio")
Cc: stable@vger.kernel.org
Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20240729201108.1615114-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Commit 708405f3e56e ("net: phy: aquantia: wait for the GLOBAL_CFG to
start returning real values") introduced a workaround for an issue
observed on aqr115c. However there were never any reports of it
happening on other models and the workaround has been reported to cause
and issue on aqr113c (and it may cause the same on any other model not
supporting 10M mode).
Let's limit the impact of the workaround to aqr113, aqr113c and aqr115c
and poll the 100M GLOBAL_CFG register instead as both models are known
to support it correctly.
Reported-by: Jon Hunter <jonathanh@nvidia.com>
Closes: https://lore.kernel.org/lkml/7c0140be-4325-4005-9068-7e0fc5ff344d@nvidia.com/
Fixes: 708405f3e56e ("net: phy: aquantia: wait for the GLOBAL_CFG to start returning real values")
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Antoine Tenart <atenart@kernel.org>
Link: https://patch.msgid.link/20240729150315.65798-1-brgl@bgdev.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
The MDIX status is not accurately reflecting the current state after the link
partner has manually altered its MDIX configuration while operating in forced
mode.
Access information about Auto mdix completion and pair selection from the
KSZ9131's Auto/MDI/MDI-X status register
Fixes: b64e6a8794d9 ("net: phy: micrel: Add PHY Auto/MDI/MDI-X set driver for KSZ9131")
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240725071125.13960-1-Raju.Lakkaraju@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Fixing ASSERT_OK condition check in uprobe_syscall test,
otherwise we return from test on pipe success.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/bpf/20240726180847.684584-1-jolsa@kernel.org
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux
Pull chrome-platform fix from Tzung-Bi Shih:
"Fix a race condition that sends multiple host commands at a time"
* tag 'chrome-platform-fixes-for-v6.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux:
platform/chrome: cros_ec_proto: Lock device when updating MKBP version
|
|
This clarifies the rules for min()/max()/clamp() type checking and makes
them a much more efficient macro expansion.
In particular, we now look at the type and range of the inputs to see
whether they work together, generating a mask of acceptable comparisons,
and then just verifying that the inputs have a shared case:
- an expression with a signed type can be used for
(1) signed comparisons
(2) unsigned comparisons if it is statically known to have a
non-negative value
- an expression with an unsigned type can be used for
(3) unsigned comparison
(4) signed comparisons if the type is smaller than 'int' and thus
the C integer promotion rules will make it signed anyway
Here rule (1) and (3) are obvious, and rule (2) is important in order to
allow obvious trivial constants to be used together with unsigned
values.
Rule (4) is not necessarily a good idea, but matches what we used to do,
and we have extant cases of this situation in the kernel. Notably with
bcachefs having an expression like
min(bch2_bucket_sectors_dirty(a), ca->mi.bucket_size)
where bch2_bucket_sectors_dirty() returns an 's64', and
'ca->mi.bucket_size' is of type 'u16'.
Technically that bcachefs comparison is clearly sensible on a C type
level, because the 'u16' will go through the normal C integer promotion,
and become 'int', and then we're comparing two signed values and
everything looks sane.
However, it's not entirely clear that a 'min(s64,u16)' operation makes a
lot of conceptual sense, and it's possible that we will remove rule (4).
After all, the _reason_ we have these complicated type checks is exactly
that the C type promotion rules are not very intuitive.
But at least for now the rule is in place for backwards compatibility.
Also note that rule (2) existed before, but is hugely relaxed by this
commit. It used to be true only for the simplest compile-time
non-negative integer constants. The new macro model will allow cases
where the compiler can trivially see that an expression is non-negative
even if it isn't necessarily a constant.
For example, the amdgpu driver does
min_t(size_t, sizeof(fru_info->serial), pia[addr] & 0x3F));
because our old 'min()' macro would see that 'pia[addr] & 0x3F' is of
type 'int' and clearly not a C constant expression, so doing a 'min()'
with a 'size_t' is a signedness violation.
Our new 'min()' macro still sees that 'pia[addr] & 0x3F' is of type
'int', but is smart enough to also see that it is clearly non-negative,
and thus would allow that case without any complaints.
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: David Laight <David.Laight@aculab.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
This function has a nested loop. The problem is that both the inside
and outside loop use the same variable as an iterator. I found this
via static analysis so I'm not sure the impact. It could be that it
loops forever or, more likely, the loop exits early.
Fixes: 3a616b92a9d1 ("net: mvpp2: Add TX flow control support for jumbo frames")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/eaa8f403-7779-4d81-973d-a9ecddc0bf6f@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
|
|
Some arch + compiler combinations report a potentially unused variable
location in btrfs_lookup_dentry(). This is a false alert as the variable
is passed by value and always valid or there's an error. The compilers
cannot probably reason about that although btrfs_inode_by_name() is in
the same file.
> + /kisskb/src/fs/btrfs/inode.c: error: 'location.objectid' may be used
+uninitialized in this function [-Werror=maybe-uninitialized]: => 5603:9
> + /kisskb/src/fs/btrfs/inode.c: error: 'location.type' may be used
+uninitialized in this function [-Werror=maybe-uninitialized]: => 5674:5
m68k-gcc8/m68k-allmodconfig
mips-gcc8/mips-allmodconfig
powerpc-gcc5/powerpc-all{mod,yes}config
powerpc-gcc5/ppc64_defconfig
Initialize it to zero, this should fix the warnings and won't change the
behaviour as btrfs_inode_by_name() accepts only a root or inode item
types, otherwise returns an error.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/linux-btrfs/bd4e9928-17b3-9257-8ba7-6b7f9bbb639a@linux-m68k.org/
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
iucv_sever_path() is called from process context and from bh context.
iucv->path is used as indicator whether somebody else is taking care of
severing the path (or it is already removed / never existed).
This needs to be done with atomic compare and swap, otherwise there is a
small window where iucv_sock_close() will try to work with a path that has
already been severed and freed by iucv_callback_connrej() called by
iucv_tasklet_fn().
Example:
[452744.123844] Call Trace:
[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)
[452744.123966] [<00000000d593001e>] iucv_path_sever+0x96/0x138
[452744.124330] [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]
[452744.124336] [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]
[452744.124341] [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]
[452744.124345] [<00000000d574794e>] __sock_release+0x5e/0xe8
[452744.124815] [<00000000d5747a0c>] sock_close+0x34/0x48
[452744.124820] [<00000000d5421642>] __fput+0xba/0x268
[452744.124826] [<00000000d51b382c>] task_work_run+0xbc/0xf0
[452744.124832] [<00000000d5145710>] do_notify_resume+0x88/0x90
[452744.124841] [<00000000d5978096>] system_call+0xe2/0x2c8
[452744.125319] Last Breaking-Event-Address:
[452744.125321] [<00000000d5930018>] iucv_path_sever+0x90/0x138
[452744.125324]
[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt
Note that bh_lock_sock() is not serializing the tasklet context against
process context, because the check for sock_owned_by_user() and
corresponding handling is missing.
Ideas for a future clean-up patch:
A) Correct usage of bh_lock_sock() in tasklet context, as described in
Link: https://lore.kernel.org/netdev/1280155406.2899.407.camel@edumazet-laptop/
Re-enqueue, if needed. This may require adding return values to the
tasklet functions and thus changes to all users of iucv.
B) Change iucv tasklet into worker and use only lock_sock() in af_iucv.
Fixes: 7d316b945352 ("af_iucv: remove IUCV-pathes completely")
Reviewed-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Link: https://patch.msgid.link/20240729122818.947756-1-wintera@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
The cros_ec_get_host_command_version_mask() function requires that the
caller must have ec_dev->lock mutex before calling it. This requirement
was not met and as a result it was possible that two commands were sent
to the device at the same time.
The problem was observed while using UART backend which doesn't use any
additional locks, unlike SPI backend which locks the controller until
response is received.
Fixes: f74c7557ed0d ("platform/chrome: cros_ec_proto: Update version on GET_NEXT_EVENT failure")
Cc: stable@vger.kernel.org
Signed-off-by: Patryk Duda <patrykd@google.com>
Link: https://lore.kernel.org/r/20240730104425.607083-1-patrykd@google.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
|
|
Following syzbot repro crashes the kernel:
socketpair(0x2, 0x1, 0x100, &(0x7f0000000140)) (fail_nth: 13)
Fix this by not calling sk_common_release() from smc_create_clcsk().
Stack trace:
socket: no more sockets
------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: CPU: 1 PID: 5092 at lib/refcount.c:28
refcount_warn_saturate+0x15a/0x1d0 lib/refcount.c:28
Modules linked in:
CPU: 1 PID: 5092 Comm: syz-executor424 Not tainted
6.10.0-syzkaller-04483-g0be9ae5486cd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 06/27/2024
RIP: 0010:refcount_warn_saturate+0x15a/0x1d0 lib/refcount.c:28
Code: 80 f3 1f 8c e8 e7 69 a8 fc 90 0f 0b 90 90 eb 99 e8 cb 4f e6 fc c6
05 8a 8d e8 0a 01 90 48 c7 c7 e0 f3 1f 8c e8 c7 69 a8 fc 90 <0f> 0b 90
90 e9 76 ff ff ff e8 a8 4f e6 fc c6 05 64 8d e8 0a 01 90
RSP: 0018:ffffc900034cfcf0 EFLAGS: 00010246
RAX: 3b9fcde1c862f700 RBX: ffff888022918b80 RCX: ffff88807b39bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: ffffffff815878a2 R09: fffffbfff1c39d94
R10: dffffc0000000000 R11: fffffbfff1c39d94 R12: 00000000ffffffe9
R13: 1ffff11004523165 R14: ffff888022918b28 R15: ffff888022918b00
FS: 00005555870e7380(0000) GS:ffff8880b9500000(0000)
knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000140 CR3: 000000007582e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inet_create+0xbaf/0xe70
__sock_create+0x490/0x920 net/socket.c:1571
sock_create net/socket.c:1622 [inline]
__sys_socketpair+0x2ca/0x720 net/socket.c:1769
__do_sys_socketpair net/socket.c:1822 [inline]
__se_sys_socketpair net/socket.c:1819 [inline]
__x64_sys_socketpair+0x9b/0xb0 net/socket.c:1819
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbcb9259669
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 a1 1a 00 00 90 48 89 f8 48 89
f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01
f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffe931c6d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007fffe931c6f0 RCX: 00007fbcb9259669
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000002 R08: 00007fffe931c476 R09: 00000000000000a0
R10: 0000000020000140 R11: 0000000000000246 R12: 00007fffe931c6ec
R13: 431bde82d7b634db R14: 0000000000000001 R15: 0000000000000001
</TASK>
Link: https://lore.kernel.org/r/20240723175809.537291-1-edumazet@google.com/
Fixes: d25a92ccae6b ("net/smc: Introduce IPPROTO_SMC")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Link: https://patch.msgid.link/1722224415-30999-1-git-send-email-alibuda@linux.alibaba.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Matthieu Baerts says:
====================
mptcp: fix inconsistent backup usage
In all the MPTCP backup related tests, the backup flag was set on one
side, and the expected behaviour is to have both sides respecting this
decision. That's also the "natural" way, and what the users seem to
expect.
On the scheduler side, only the 'backup' field was checked, which is
supposed to be set only if the other peer flagged a subflow as backup.
But in various places, this flag was also set when the local host
flagged the subflow as backup, certainly to have the expected behaviour
mentioned above.
Patch 1 modifies the packet scheduler to check if the backup flag has
been set on both directions, not to change its behaviour after having
applied the following patches. That's what the default packet scheduler
should have done since the beginning in v5.7.
Patch 2 fixes the backup flag being mirrored on the MPJ+SYN+ACK by
accident since its introduction in v5.7. Instead, the received and sent
backup flags are properly distinguished in requests.
Patch 3 stops setting the received backup flag as well when sending an
MP_PRIO, something that was done since the MP_PRIO support in v5.12.
Patch 4 adds related and missing MIB counters to be able to easily check
if MP_JOIN are sent with a backup flag. Certainly because these counters
were not there, the behaviour that is fixed by patches here was not
properly verified.
Patch 5 validates the previous patch by extending the MPTCP Join
selftest.
Patch 6 fixes the backup support in signal endpoints: if a signal
endpoint had the backup flag, it was not set in the MPJ+SYN+ACK as
expected. It was only set for ongoing connections, but not future ones
as expected, since the introduction of the backup flag in endpoints in
v5.10.
Patch 7 validates the previous patch by extending the MPTCP Join
selftest as well.
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
---
Matthieu Baerts (NGI0) (7):
mptcp: sched: check both directions for backup
mptcp: distinguish rcv vs sent backup flag in requests
mptcp: pm: only set request_bkup flag when sending MP_PRIO
mptcp: mib: count MPJ with backup flag
selftests: mptcp: join: validate backup in MPJ
mptcp: pm: fix backup support in signal endpoints
selftests: mptcp: join: check backup support in signal endp
include/trace/events/mptcp.h | 2 +-
net/mptcp/mib.c | 2 +
net/mptcp/mib.h | 2 +
net/mptcp/options.c | 2 +-
net/mptcp/pm.c | 12 +++++
net/mptcp/pm_netlink.c | 19 ++++++-
net/mptcp/pm_userspace.c | 18 +++++++
net/mptcp/protocol.c | 10 ++--
net/mptcp/protocol.h | 4 ++
net/mptcp/subflow.c | 10 ++++
tools/testing/selftests/net/mptcp/mptcp_join.sh | 72 ++++++++++++++++++++-----
11 files changed, 132 insertions(+), 21 deletions(-)
====================
Link: https://patch.msgid.link/20240727-upstream-net-20240727-mptcp-backup-signal-v1-0-f50b31604cf1@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Before the previous commit, 'signal' endpoints with the 'backup' flag
were ignored when sending the MP_JOIN.
The MPTCP Join selftest has then been modified to validate this case:
the "single address, backup" test, is now validating the MP_JOIN with a
backup flag as it is what we expect it to do with such name. The
previous version has been kept, but renamed to "single address, switch
to backup" to avoid confusions.
The "single address with port, backup" test is also now validating the
MPJ with a backup flag, which makes more sense than checking the switch
to backup with an MP_PRIO.
The "mpc backup both sides" test is now validating that the backup flag
is also set in MP_JOIN from and to the addresses used in the initial
subflow, using the special ID 0.
The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it validates the previous fix for an issue introduced by this commit
ID.
Fixes: 4596a2c1b7f5 ("mptcp: allow creating non-backup subflows")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
There was a support for signal endpoints, but only when the endpoint's
flag was changed during a connection. If an endpoint with the signal and
backup was already present, the MP_JOIN reply was not containing the
backup flag as expected.
That's confusing to have this inconsistent behaviour. On the other hand,
the infrastructure to set the backup flag in the SYN + ACK + MP_JOIN was
already there, it was just never set before. Now when requesting the
local ID from the path-manager, the backup status is also requested.
Note that when the userspace PM is used, the backup flag can be set if
the local address was already used before with a backup flag, e.g. if
the address was announced with the 'backup' flag, or a subflow was
created with the 'backup' flag.
Fixes: 4596a2c1b7f5 ("mptcp: allow creating non-backup subflows")
Cc: stable@vger.kernel.org
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/507
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
A peer can notify the other one that a subflow has to be treated as
"backup" by two different ways: either by sending a dedicated MP_PRIO
notification, or by setting the backup flag in the MP_JOIN handshake.
The selftests were previously monitoring the former, but not the latter.
This is what is now done here by looking at these new MIB counters when
validating the 'backup' cases:
MPTcpExtMPJoinSynBackupRx
MPTcpExtMPJoinSynAckBackupRx
The 'Fixes' tag here below is the same as the one from the previous
commit: this patch here is not fixing anything wrong in the selftests,
but it will help to validate a new fix for an issue introduced by this
commit ID.
Fixes: 4596a2c1b7f5 ("mptcp: allow creating non-backup subflows")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
Without such counters, it is difficult to easily debug issues with MPJ
not having the backup flags on production servers.
This is not strictly a fix, but it eases to validate the following
patches without requiring to take packet traces, to query ongoing
connections with Netlink with admin permissions, or to guess by looking
at the behaviour of the packet scheduler. Also, the modification is self
contained, isolated, well controlled, and the increments are done just
after others, there from the beginning. It looks then safe, and helpful
to backport this.
Fixes: 4596a2c1b7f5 ("mptcp: allow creating non-backup subflows")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
The 'backup' flag from mptcp_subflow_context structure is supposed to be
set only when the other peer flagged a subflow as backup, not the
opposite.
Fixes: 067065422fcd ("mptcp: add the outgoing MP_PRIO support")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
|
|
When sending an MP_JOIN + SYN + ACK, it is possible to mark the subflow
as 'backup' by setting the flag with the same name. Before this patch,
the backup was set if the other peer set it in its MP_JOIN + SYN
request.
It is not correct: the backup flag should be set in the MPJ+SYN+ACK only
if the host asks for it, and not mirroring what was done by the other
peer. It is then required to have a dedicated bit for each direction,
similar to what is done in the subflow context.
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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The 'mptcp_subflow_context' structure has two items related to the
backup flags:
- 'backup': the subflow has been marked as backup by the other peer
- 'request_bkup': the backup flag has been set by the host
Before this patch, the scheduler was only looking at the 'backup' flag.
That can make sense in some cases, but it looks like that's not what we
wanted for the general use, because either the path-manager was setting
both of them when sending an MP_PRIO, or the receiver was duplicating
the 'backup' flag in the subflow request.
Note that the use of these two flags in the path-manager are going to be
fixed in the next commits, but this change here is needed not to modify
the behaviour.
Fixes: f296234c98a8 ("mptcp: Add handling of incoming MP_JOIN requests")
Cc: stable@vger.kernel.org
Reviewed-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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For some reason I didn't see this issue on my arm64 or x86-64 builds,
but Stephen Rothwell reports that commit 2accfdb7eff6 ("profiling:
attempt to remove per-cpu profile flip buffer") left these static
variables around, and the powerpc build is unhappy about them:
kernel/profile.c:52:28: warning: 'cpu_profile_flip' defined but not used [-Wunused-variable]
52 | static DEFINE_PER_CPU(int, cpu_profile_flip);
| ^~~~~~~~~~~~~~~~
..
So remove these stale left-over remnants too.
Fixes: 2accfdb7eff6 ("profiling: attempt to remove per-cpu profile flip buffer")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Jakub reports build failures when merging linux/master with net tree:
CXX test_cpp
In file included from <built-in>:454:
<command line>:2:9: error: '_GNU_SOURCE' macro redefined [-Werror,-Wmacro-redefined]
2 | #define _GNU_SOURCE
| ^
<built-in>:445:9: note: previous definition is here
445 | #define _GNU_SOURCE 1
The culprit is commit cc937dad85ae ("selftests: centralize -D_GNU_SOURCE= to
CFLAGS in lib.mk") which unconditionally added -D_GNU_SOUCE to CLFAGS.
Apparently clang++ also unconditionally adds it for the C++ targets [0]
which causes a conflict. Add small change in the selftests makefile
to filter it out for test_cpp.
Not sure which tree it should go via, targeting bpf for now, but net
might be better?
0: https://stackoverflow.com/questions/11670581/why-is-gnu-source-defined-by-default-and-how-to-turn-it-off
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/bpf/20240725214029.1760809-1-sdf@fomichev.me
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git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid
Pull HID fixes from Benjamin Tissoires:
- fixes for HID-BPF after the merge with the bpf tree (Arnd Bergmann
and Benjamin Tissoires)
- some tool type fix for the Wacom driver (Tatsunosuke Tobita)
- a reorder of the sensor discovery to ensure the HID AMD SFH is
removed when no sensors are available (Basavaraj Natikar)
* tag 'for-linus-2024072901' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid:
selftests/hid: add test for attaching multiple time the same struct_ops
HID: bpf: prevent the same struct_ops to be attached more than once
selftests/hid: disable struct_ops auto-attach
selftests/hid: fix bpf_wq new API
HID: amd_sfh: Move sensor discovery before HID device initialization
hid: bpf: add BPF_JIT dependency
HID: wacom: more appropriate tool type categorization
HID: wacom: Modify pen IDs
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Pull virtio fixes from Michael Tsirkin:
"The biggest thing here is the adminq change - but it looks like the
only way to avoid headq blocking causing indefinite stalls.
This fixes three issues:
- Prevent admin commands on one VF blocking another.
This prevents a bad VF from blocking a good one, as well as fixing
a scalability issue with large # of VFs
- Correctly return error on command failure on octeon. We used to
treat failed commands as a success.
- Fix modpost warning when building virtio_dma_buf. Harmless, but the
fix is trivial"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio_pci_modern: remove admin queue serialization lock
virtio_pci_modern: use completion instead of busy loop to wait on admin cmd result
virtio_pci_modern: pass cmd as an identification token
virtio_pci_modern: create admin queue of queried size
virtio: create admin queues alongside other virtqueues
virtio_pci: pass vq info as an argument to vp_setup_vq()
virtio: push out code to vp_avq_index()
virtio_pci_modern: treat vp_dev->admin_vq.info.vq pointer as static
virtio_pci: introduce vector allocation fallback for slow path virtqueues
virtio_pci: pass vector policy enum to vp_find_one_vq_msix()
virtio_pci: pass vector policy enum to vp_find_vqs_msix()
virtio_pci: simplify vp_request_msix_vectors() call a bit
virtio_pci: push out single vq find code to vp_find_one_vq_msix()
vdpa/octeon_ep: Fix error code in octep_process_mbox()
virtio: add missing MODULE_DESCRIPTION() macro
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The TWA_NMI_CURRENT handling very much depends on IRQ_WORK, but that
isn't universally enabled everywhere.
Maybe the IRQ_WORK infrastructure should just be unconditional - x86
ends up indirectly enabling it through unconditionally enabling
PERF_EVENTS, for example. But it also gets enabled by having SMP
support, or even if you just have PRINTK enabled.
But in the meantime TWA_NMI_CURRENT causes tons of build failures on
various odd minimal configs. Which did show up in linux-next, but
despite that nobody bothered to fix it or even inform me until -rc1 was
out.
Fixes: 466e4d801cd4 ("task_work: Add TWA_NMI_CURRENT as an additional notify mode")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: kernelci.org bot <bot@kernelci.org>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This is the really old legacy kernel profiling code, which has long
since been obviated by "real profiling" (ie 'prof' and company), and
mainly remains as a source of syzbot reports.
There are anecdotal reports that people still use it for boot-time
profiling, but it's unlikely that such use would care about the old NUMA
optimizations in this code from 2004 (commit ad02973d42: "profile: 512x
Altix timer interrupt livelock fix" in the BK import archive at [1])
So in order to head off future syzbot reports, let's try to simplify
this code and get rid of the per-cpu profile buffers that are quite a
large portion of the complexity footprint of this thing (including CPU
hotplug callbacks etc).
It's unlikely anybody will actually notice, or possibly, as Thomas put
it: "Only people who indulge in nostalgia will notice :)".
That said, if it turns out that this code is actually actively used by
somebody, we can always revert this removal. Thus the "attempt" in the
summary line.
[ Note: in a small nod to "the profiling code can cause NUMA problems",
this also removes the "increment the last entry in the profiling array
on any unknown hits" logic. That would account any program counter in
a module to that single counter location, and might exacerbate any
NUMA cacheline bouncing issues ]
Link: https://lore.kernel.org/all/CAHk-=wgs52BxT4Zjmjz8aNvHWKxf5_ThBY4bYL1Y6CTaNL2dTw@mail.gmail.com/
Link: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git [1]
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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syzbot is reporting uninit-value at profile_hits(), for there is a race
window between
if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_copy(prof_cpu_mask, cpu_possible_mask);
in profile_init() and
cpumask_available(prof_cpu_mask) &&
cpumask_test_cpu(smp_processor_id(), prof_cpu_mask))
in profile_tick(); prof_cpu_mask remains uninitialzed until cpumask_copy()
completes while cpumask_available(prof_cpu_mask) returns true as soon as
alloc_cpumask_var(&prof_cpu_mask) completes.
We could replace alloc_cpumask_var() with zalloc_cpumask_var() and
call cpumask_copy() from create_proc_profile() on only UP kernels, for
profile_online_cpu() calls cpumask_set_cpu() as needed via
cpuhp_setup_state(CPUHP_AP_ONLINE_DYN) on SMP kernels. But this patch
removes prof_cpu_mask because it seems unnecessary.
The cpumask_test_cpu(smp_processor_id(), prof_cpu_mask) test
in profile_tick() is likely always true due to
a CPU cannot call profile_tick() if that CPU is offline
and
cpumask_set_cpu(cpu, prof_cpu_mask) is called when that CPU becomes
online and cpumask_clear_cpu(cpu, prof_cpu_mask) is called when that
CPU becomes offline
. This test could be false during transition between online and offline.
But according to include/linux/cpuhotplug.h , CPUHP_PROFILE_PREPARE
belongs to PREPARE section, which means that the CPU subjected to
profile_dead_cpu() cannot be inside profile_tick() (i.e. no risk of
use-after-free bug) because interrupt for that CPU is disabled during
PREPARE section. Therefore, this test is guaranteed to be true, and
can be removed. (Since profile_hits() checks prof_buffer != NULL, we
don't need to check prof_buffer != NULL here unless get_irq_regs() or
user_mode() is such slow that we want to avoid when prof_buffer == NULL).
do_profile_hits() is called from profile_tick() from timer interrupt
only if cpumask_test_cpu(smp_processor_id(), prof_cpu_mask) is true and
prof_buffer is not NULL. But syzbot is also reporting that sometimes
do_profile_hits() is called while current thread is still doing vzalloc(),
where prof_buffer must be NULL at this moment. This indicates that multiple
threads concurrently tried to write to /sys/kernel/profiling interface,
which caused that somebody else try to re-allocate prof_buffer despite
somebody has already allocated prof_buffer. Fix this by using
serialization.
Reported-by: syzbot <syzbot+b1a83ab2a9eb9321fbdd@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=b1a83ab2a9eb9321fbdd
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tested-by: syzbot <syzbot+b1a83ab2a9eb9321fbdd@syzkaller.appspotmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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syzbot is reporting too large allocation at input_mt_init_slots(), for
num_slots is supplied from userspace using ioctl(UI_DEV_CREATE).
Since nobody knows possible max slots, this patch chose 1024.
Reported-by: syzbot <syzbot+0122fa359a69694395d5@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=0122fa359a69694395d5
Suggested-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull ARM updates from Russell King:
- ftrace: don't assume stack frames are contiguous in memory
- remove unused mod_inwind_map structure
- spelling fixes
- allow use of LD dead code/data elimination
- fix callchain_trace() return value
- add support for stackleak gcc plugin
- correct some reset asm function prototypes for CFI
[ Missed the merge window because Russell forgot to push out ]
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
ARM: 9408/1: mm: CFI: Fix some erroneous reset prototypes
ARM: 9407/1: Add support for STACKLEAK gcc plugin
ARM: 9406/1: Fix callchain_trace() return value
ARM: 9404/1: arm32: enable HAVE_LD_DEAD_CODE_DATA_ELIMINATION
ARM: 9403/1: Alpine: Spelling s/initialiing/initializing/
ARM: 9402/1: Kconfig: Spelling s/Cortex A-/Cortex-A/
ARM: 9400/1: Remove unused struct 'mod_unwind_map'
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During an append (O_APPEND write flag) direct IO write if the input buffer
was not previously faulted in, we can corrupt the file in a way that the
final size is unexpected and it includes an unexpected hole.
The problem happens like this:
1) We have an empty file, with size 0, for example;
2) We do an O_APPEND direct IO with a length of 4096 bytes and the input
buffer is not currently faulted in;
3) We enter btrfs_direct_write(), lock the inode and call
generic_write_checks(), which calls generic_write_checks_count(), and
that function sets the iocb position to 0 with the following code:
if (iocb->ki_flags & IOCB_APPEND)
iocb->ki_pos = i_size_read(inode);
4) We call btrfs_dio_write() and enter into iomap, which will end up
calling btrfs_dio_iomap_begin() and that calls
btrfs_get_blocks_direct_write(), where we update the i_size of the
inode to 4096 bytes;
5) After btrfs_dio_iomap_begin() returns, iomap will attempt to access
the page of the write input buffer (at iomap_dio_bio_iter(), with a
call to bio_iov_iter_get_pages()) and fail with -EFAULT, which gets
returned to btrfs at btrfs_direct_write() via btrfs_dio_write();
6) At btrfs_direct_write() we get the -EFAULT error, unlock the inode,
fault in the write buffer and then goto to the label 'relock';
7) We lock again the inode, do all the necessary checks again and call
again generic_write_checks(), which calls generic_write_checks_count()
again, and there we set the iocb's position to 4K, which is the current
i_size of the inode, with the following code pointed above:
if (iocb->ki_flags & IOCB_APPEND)
iocb->ki_pos = i_size_read(inode);
8) Then we go again to btrfs_dio_write() and enter iomap and the write
succeeds, but it wrote to the file range [4K, 8K), leaving a hole in
the [0, 4K) range and an i_size of 8K, which goes against the
expectations of having the data written to the range [0, 4K) and get an
i_size of 4K.
Fix this by not unlocking the inode before faulting in the input buffer,
in case we get -EFAULT or an incomplete write, and not jumping to the
'relock' label after faulting in the buffer - instead jump to a location
immediately before calling iomap, skipping all the write checks and
relocking. This solves this problem and it's fine even in case the input
buffer is memory mapped to the same file range, since only holding the
range locked in the inode's io tree can cause a deadlock, it's safe to
keep the inode lock (VFS lock), as was fixed and described in commit
51bd9563b678 ("btrfs: fix deadlock due to page faults during direct IO
reads and writes").
A sample reproducer provided by a reporter is the following:
$ cat test.c
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <fcntl.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
int main(int argc, char *argv[])
{
if (argc < 2) {
fprintf(stderr, "Usage: %s <test file>\n", argv[0]);
return 1;
}
int fd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC | O_DIRECT |
O_APPEND, 0644);
if (fd < 0) {
perror("creating test file");
return 1;
}
char *buf = mmap(NULL, 4096, PROT_READ,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ssize_t ret = write(fd, buf, 4096);
if (ret < 0) {
perror("pwritev2");
return 1;
}
struct stat stbuf;
ret = fstat(fd, &stbuf);
if (ret < 0) {
perror("stat");
return 1;
}
printf("size: %llu\n", (unsigned long long)stbuf.st_size);
return stbuf.st_size == 4096 ? 0 : 1;
}
A test case for fstests will be sent soon.
Reported-by: Hanna Czenczek <hreitz@redhat.com>
Link: https://lore.kernel.org/linux-btrfs/0b841d46-12fe-4e64-9abb-871d8d0de271@redhat.com/
Fixes: 8184620ae212 ("btrfs: fix lost file sync on direct IO write with nowait and dsync iocb")
CC: stable@vger.kernel.org # 6.1+
Tested-by: Hanna Czenczek <hreitz@redhat.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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again
When btrfs makes a block group read-only, it adds all free regions in the
block group to space_info->bytes_readonly. That free space excludes
reserved and pinned regions. OTOH, when btrfs makes the block group
read-write again, it moves all the unused regions into the block group's
zone_unusable. That unused region includes reserved and pinned regions.
As a result, it counts too much zone_unusable bytes.
Fortunately (or unfortunately), having erroneous zone_unusable does not
affect the calculation of space_info->bytes_readonly, because free
space (num_bytes in btrfs_dec_block_group_ro) calculation is done based on
the erroneous zone_unusable and it reduces the num_bytes just to cancel the
error.
This behavior can be easily discovered by adding a WARN_ON to check e.g,
"bg->pinned > 0" in btrfs_dec_block_group_ro(), and running fstests test
case like btrfs/282.
Fix it by properly considering pinned and reserved in
btrfs_dec_block_group_ro(). Also, add a WARN_ON and introduce
btrfs_space_info_update_bytes_zone_unusable() to catch a similar mistake.
Fixes: 169e0da91a21 ("btrfs: zoned: track unusable bytes for zones")
CC: stable@vger.kernel.org # 5.15+
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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