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syzbot was able to trigger a warning [1] from net_free()
calling ref_tracker_dir_exit(&net->notrefcnt_tracker)
while the corresponding ref_tracker_dir_init() has not been
done yet.
copy_net_ns() can indeed bypass the call to setup_net()
in some error conditions.
Note:
We might factorize/move more code in preinit_net() in the future.
[1]
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 5817 Comm: syz-executor.3 Not tainted 6.2.0-rc7-next-20230208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
assign_lock_key kernel/locking/lockdep.c:982 [inline]
register_lock_class+0xdb6/0x1120 kernel/locking/lockdep.c:1295
__lock_acquire+0x10a/0x5df0 kernel/locking/lockdep.c:4951
lock_acquire.part.0+0x11c/0x370 kernel/locking/lockdep.c:5691
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
ref_tracker_dir_exit+0x52/0x600 lib/ref_tracker.c:24
net_free net/core/net_namespace.c:442 [inline]
net_free+0x98/0xd0 net/core/net_namespace.c:436
copy_net_ns+0x4f3/0x6b0 net/core/net_namespace.c:493
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:228
ksys_unshare+0x449/0x920 kernel/fork.c:3205
__do_sys_unshare kernel/fork.c:3276 [inline]
__se_sys_unshare kernel/fork.c:3274 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:3274
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
Fixes: 0cafd77dcd03 ("net: add a refcount tracker for kernel sockets")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230208182123.3821604-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Guillaume Nault says:
====================
ipv6: Fix socket connection with DSCP fib-rules.
The "flowlabel" field of struct flowi6 is used to store both the actual
flow label and the DS Field (or Traffic Class). However the .connect
handlers of datagram and TCP sockets don't set the DS Field part when
doing their route lookup. This breaks fib-rules that match on DSCP.
====================
Link: https://lore.kernel.org/r/cover.1675875519.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Add the fib_rule6_send and fib_rule4_send tests to verify that DSCP
values are properly taken into account when UDP or TCP sockets try to
connect().
Tests are done with nettest, which needs a new option to specify
the DS Field value of the socket being tested. This new option is
named '-Q', in reference to the similar option used by ping.
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Take into account the IPV6_TCLASS socket option (DSCP) in
tcp_v6_connect(). Otherwise fib6_rule_match() can't properly
match the DSCP value, resulting in invalid route lookup.
For example:
ip route add unreachable table main 2001:db8::10/124
ip route add table 100 2001:db8::10/124 dev eth0
ip -6 rule add dsfield 0x04 table 100
echo test | socat - TCP6:[2001:db8::11]:54321,ipv6-tclass=0x04
Without this patch, socat fails at connect() time ("No route to host")
because the fib-rule doesn't jump to table 100 and the lookup ends up
being done in the main table.
Fixes: 2cc67cc731d9 ("[IPV6] ROUTE: Routing by Traffic Class.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Take into account the IPV6_TCLASS socket option (DSCP) in
ip6_datagram_flow_key_init(). Otherwise fib6_rule_match() can't
properly match the DSCP value, resulting in invalid route lookup.
For example:
ip route add unreachable table main 2001:db8::10/124
ip route add table 100 2001:db8::10/124 dev eth0
ip -6 rule add dsfield 0x04 table 100
echo test | socat - UDP6:[2001:db8::11]:54321,ipv6-tclass=0x04
Without this patch, socat fails at connect() time ("No route to host")
because the fib-rule doesn't jump to table 100 and the lookup ends up
being done in the main table.
Fixes: 2cc67cc731d9 ("[IPV6] ROUTE: Routing by Traffic Class.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Simon Horman says:
====================
nfp: fix schedule in atomic context when offloading sa
Yinjun Zhang says:
IPsec offloading callbacks may be called in atomic context, sleep is
not allowed in the implementation. Now use workqueue mechanism to
avoid this issue.
Extend existing workqueue mechanism for multicast configuration only
to universal use, so that all configuring through mailbox asynchoronously
can utilize it.
Also fix another two incorrect use of mailbox in IPsec:
1. Need lock for race condition when accessing mbox
2. Offset of mbox access should depends on tlv caps
====================
Link: https://lore.kernel.org/r/20230208102258.29639-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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IPsec offloading callbacks may be called in atomic context, sleep is
not allowed in the implementation. Now use workqueue mechanism to
avoid this issue.
Extend existing workqueue mechanism for multicast configuration only
to universal use, so that all configuring through mailbox asynchronously
can utilize it.
Fixes: 859a497fe80c ("nfp: implement xfrm callbacks and expose ipsec offload feature to upper layer")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The mailbox configuration mechanism requires writing several registers,
which shouldn't be interrupted, so need lock to avoid race condition.
The base offset of mailbox configuration registers is not fixed, it
depends on TLV caps read from application firmware.
Fixes: 859a497fe80c ("nfp: implement xfrm callbacks and expose ipsec offload feature to upper layer")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Code blocks handling BCMA_CHIP_ID_BCM5357 and BCMA_CHIP_ID_BCM53572 were
incorrectly unified. Chip package values are not unique and cannot be
checked independently. They are meaningful only in a context of a given
chip.
Packages BCM5358 and BCM47188 share the same value but then belong to
different chips. Code unification resulted in treating BCM5358 as
BCM47188 and broke its initialization.
Link: https://github.com/openwrt/openwrt/issues/8278
Fixes: cb1b0f90acfe ("net: ethernet: bgmac: unify code of the same family")
Cc: Jon Mason <jdmason@kudzu.us>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20230208091637.16291-1-zajec5@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Pull drm fixes from Dave Airlie:
"Weekly fixes.
The amdgpu had a few small fixes to display flicker on certain
configurations, however it was found the the flicker was lessened but
there were other unintended consequences, so for now they've been
reverted and replaced with an option for users to test with so future
fixes can be developed.
Otherwise apart from the usual bunch of i915 and amdgpu, there's a
client, virtio-gpu and an nvidiafb fix that reorders its loading to
avoid failure.
client:
- refcount fix
amdgpu:
- a bunch of attempted flicker fixes that regressed turned into a
user workaround option for now
- Properly fix S/G display with AGP aperture enabled
- Fix cursor offset with 180 rotation
- SMU13 fixes
- Use TGID for GPUVM traces
- Fix oops on in fence error path
- Don't run IB tests on hw rings when sw rings are in use
- memory leak fix
i915:
- Display watermark fix
- fbdev fix for PSR, FBC, DRRS
- Move fd_install after last use of fence
- Initialize the obj flags for shmem objects
- Fix VBT DSI DVO port handling
virtio-gpu:
- fence fix
nvidiafb:
- regression fix for driver load when no hw supported"
* tag 'drm-fixes-2023-02-10' of git://anongit.freedesktop.org/drm/drm: (27 commits)
Revert "drm/amd/display: disable S/G display on DCN 3.1.5"
Revert "drm/amd/display: disable S/G display on DCN 2.1.0"
Revert "drm/amd/display: disable S/G display on DCN 3.1.2/3"
drm/amdgpu: add S/G display parameter
drm/amdgpu/smu: skip pptable init under sriov
amd/amdgpu: remove test ib on hw ring
drm/amdgpu/fence: Fix oops due to non-matching drm_sched init/fini
drm/amdgpu: Use the TGID for trace_amdgpu_vm_update_ptes
drm/amdgpu: Add unique_id support for GC 11.0.1/2
drm/amd/pm: bump SMU 13.0.7 driver_if header version
drm/amd/pm: bump SMU 13.0.0 driver_if header version
drm/amd/pm: add SMU 13.0.7 missing GetPptLimit message mapping
drm/amd/display: fix cursor offset on rotation 180
drm/amd/amdgpu: enable athub cg 11.0.3
Revert "drm/amd/display: disable S/G display on DCN 3.1.4"
drm/amd/display: properly handling AGP aperture in vm setup
drm/amd/display: disable S/G display on DCN 3.1.2/3
drm/amd/display: disable S/G display on DCN 2.1.0
drm/i915: Fix VBT DSI DVO port handling
drm/client: fix circular reference counting issue
...
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Pull rdma fixes from Jason Gunthorpe:
"The usual collection of small driver bug fixes:
- Fix error unwind bugs in hfi1, irdma rtrs
- Old bug with IPoIB children interfaces possibly using the wrong
number of queues
- Really old bug in usnic calling iommu_map in an atomic context
- Recent regression from the DMABUF locking rework
- Missing user data validation in MANA"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/rtrs: Don't call kobject_del for srv_path->kobj
RDMA/mana_ib: Prevent array underflow in mana_ib_create_qp_raw()
IB/hfi1: Assign npages earlier
RDMA/umem: Use dma-buf locked API to solve deadlock
RDMA/usnic: use iommu_map_atomic() under spin_lock()
RDMA/irdma: Fix potential NULL-ptr-dereference
IB/IPoIB: Fix legacy IPoIB due to wrong number of queues
IB/hfi1: Restore allocated resources on failed copyout
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`dasd_reserve_req` is allocated before `dasd_vol_info_req`, and it
also needs to be freed before the error returns, just like the other
cases in this function.
Fixes: 9e12e54c7a8f ("s390/dasd: Handle out-of-space constraint")
Signed-off-by: Qiheng Lin <linqiheng@huawei.com>
Link: https://lore.kernel.org/r/20221208133809.16796-1-linqiheng@huawei.com
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20230210000253.1644903-3-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This does not fix a real bug, since virtual addresses
are currently indentical to physical ones.
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20230210000253.1644903-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Commit b99182c501c3 ("bio: add pcpu caching for non-polling bio_put")
removed the code that uses this constant. Hence also remove the constant
itself.
Cc: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230209230135.3475829-1-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Patch series "Fix kmemleak crashes when scanning CMA regions", v2.
When trying to boot a device with an ARM64 kernel with the following
config options enabled:
CONFIG_DEBUG_PAGEALLOC=y
CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT=y
CONFIG_DEBUG_KMEMLEAK=y
a crash is encountered when kmemleak starts to scan the list of gray
or allocated objects that it maintains. Upon closer inspection, it was
observed that these page-faults always occurred when kmemleak attempted
to scan a CMA region.
At the moment, kmemleak is made aware of CMA regions that are specified
through the devicetree to be dynamically allocated within a range of
addresses. However, kmemleak should not need to scan CMA regions or any
reserved memory region, as those regions can be used for DMA transfers
between drivers and peripherals, and thus wouldn't contain anything
useful for kmemleak.
Additionally, since CMA regions are unmapped from the kernel's address
space when they are freed to the buddy allocator at boot when
CONFIG_DEBUG_PAGEALLOC is enabled, kmemleak shouldn't attempt to access
those memory regions, as that will trigger a crash. Thus, kmemleak
should ignore all dynamically allocated reserved memory regions.
This patch (of 1):
Currently, kmemleak ignores dynamically allocated reserved memory regions
that don't have a kernel mapping. However, regions that do retain a
kernel mapping (e.g. CMA regions) do get scanned by kmemleak.
This is not ideal for two reasons:
1 kmemleak works by scanning memory regions for pointers to allocated
objects to determine if those objects have been leaked or not.
However, reserved memory regions can be used between drivers and
peripherals for DMA transfers, and thus, would not contain pointers to
allocated objects, making it unnecessary for kmemleak to scan these
reserved memory regions.
2 When CONFIG_DEBUG_PAGEALLOC is enabled, along with kmemleak, the
CMA reserved memory regions are unmapped from the kernel's address
space when they are freed to buddy at boot. These CMA reserved regions
are still tracked by kmemleak, however, and when kmemleak attempts to
scan them, a crash will happen, as accessing the CMA region will result
in a page-fault, since the regions are unmapped.
Thus, use kmemleak_ignore_phys() for all dynamically allocated reserved
memory regions, instead of those that do not have a kernel mapping
associated with them.
Link: https://lkml.kernel.org/r/20230208232001.2052777-1-isaacmanjarres@google.com
Link: https://lkml.kernel.org/r/20230208232001.2052777-2-isaacmanjarres@google.com
Fixes: a7259df76702 ("memblock: make memblock_find_in_range method private")
Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Kirill A. Shutemov <kirill.shtuemov@linux.intel.com>
Cc: Nick Kossifidis <mick@ics.forth.gr>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Cc: Saravana Kannan <saravanak@google.com>
Cc: <stable@vger.kernel.org> [5.15+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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When printing the name of the current process, it will report an error:
(gdb) p $lx_current().comm Python Exception <class 'gdb.error'> No symbol
"current_task" in current context.: Error occurred in Python: No symbol
"current_task" in current context.
Because e57ef2ed97c1 ("x86: Put hot per CPU variables into a struct")
changed it.
Link: https://lkml.kernel.org/r/20230204090139.1789264-1-xiehuan09@gmail.com
Fixes: e57ef2ed97c1 ("x86: Put hot per CPU variables into a struct")
Signed-off-by: Jeff Xie <xiehuan09@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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Memory will be allocated to store substring_t in match_strdup(), which
means the caller of match_strdup() may need to be scheduled out to wait
for reclaiming memory. smatch complains that this can cuase sleeping in
an atoic context.
Using local array to store substring_t to remove the restriction.
Link: https://lkml.kernel.org/r/20230120032352.242767-1-lilingfeng3@huawei.com
Link: https://lore.kernel.org/all/20221104023938.2346986-5-yukuai1@huaweicloud.com/
Link: https://lkml.kernel.org/r/20230120032352.242767-1-lilingfeng3@huawei.com
Fixes: 2c0647988433 ("blk-iocost: don't release 'ioc->lock' while updating params")
Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com>
Reported-by: Yu Kuai <yukuai1@huaweicloud.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: BingJing Chang <bingjingc@synology.com>
Cc: Eric Biggers <ebiggers@google.com>
Cc: Hou Tao <houtao1@huawei.com>
Cc: James Smart <james.smart@broadcom.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: yangerkun <yangerkun@huawei.com>
Cc: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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The debugfs_remove_recursive() is invoked by unregister_shrinker(), which
is holding the write lock of shrinker_rwsem. It will waits for the
handler of debugfs file complete. The handler also needs to hold the read
lock of shrinker_rwsem to do something. So it may cause the following
deadlock:
CPU0 CPU1
debugfs_file_get()
shrinker_debugfs_count_show()/shrinker_debugfs_scan_write()
unregister_shrinker()
--> down_write(&shrinker_rwsem);
debugfs_remove_recursive()
// wait for (A)
--> wait_for_completion();
// wait for (B)
--> down_read_killable(&shrinker_rwsem)
debugfs_file_put() -- (A)
up_write() -- (B)
The down_read_killable() can be killed, so that the above deadlock can be
recovered. But it still requires an extra kill action, otherwise it will
block all subsequent shrinker-related operations, so it's better to fix
it.
[akpm@linux-foundation.org: fix CONFIG_SHRINKER_DEBUG=n stub]
Link: https://lkml.kernel.org/r/20230202105612.64641-1-zhengqi.arch@bytedance.com
Fixes: 5035ebc644ae ("mm: shrinkers: introduce debugfs interface for memory shrinkers")
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Reviewed-by: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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When the kernel copies a page from ksm_might_need_to_copy(), but runs into
an uncorrectable error, it will crash since poisoned page is consumed by
kernel, this is similar to the issue recently fixed by Copy-on-write
poison recovery.
When an error is detected during the page copy, return VM_FAULT_HWPOISON
in do_swap_page(), and install a hwpoison entry in unuse_pte() when
swapoff, which help us to avoid system crash. Note, memory failure on a
KSM page will be skipped, but still call memory_failure_queue() to be
consistent with general memory failure process, and we could support KSM
page recovery in the feature.
[wangkefeng.wang@huawei.com: enhance unuse_pte(), fix issue found by lkp]
Link: https://lkml.kernel.org/r/20221213120523.141588-1-wangkefeng.wang@huawei.com
[wangkefeng.wang@huawei.com: update changelog, alter ksm_might_need_to_copy(), restore unlikely() in unuse_pte()]
Link: https://lkml.kernel.org/r/20230201074433.96641-1-wangkefeng.wang@huawei.com
Link: https://lkml.kernel.org/r/20221209072801.193221-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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On powerpc64, you can build a kernel with KASAN as soon as you build it
with RADIX MMU support. However if the CPU doesn't have RADIX MMU, KASAN
isn't enabled at init and the following Oops is encountered.
[ 0.000000][ T0] KASAN not enabled as it requires radix!
[ 4.484295][ T26] BUG: Unable to handle kernel data access at 0xc00e000000804a04
[ 4.485270][ T26] Faulting instruction address: 0xc00000000062ec6c
[ 4.485748][ T26] Oops: Kernel access of bad area, sig: 11 [#1]
[ 4.485920][ T26] BE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries
[ 4.486259][ T26] Modules linked in:
[ 4.486637][ T26] CPU: 0 PID: 26 Comm: kworker/u2:2 Not tainted 6.2.0-rc3-02590-gf8a023b0a805 #249
[ 4.486907][ T26] Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1200 0xf000005 of:SLOF,HEAD pSeries
[ 4.487445][ T26] Workqueue: eval_map_wq .tracer_init_tracefs_work_func
[ 4.488744][ T26] NIP: c00000000062ec6c LR: c00000000062bb84 CTR: c0000000002ebcd0
[ 4.488867][ T26] REGS: c0000000049175c0 TRAP: 0380 Not tainted (6.2.0-rc3-02590-gf8a023b0a805)
[ 4.489028][ T26] MSR: 8000000002009032 <SF,VEC,EE,ME,IR,DR,RI> CR: 44002808 XER: 00000000
[ 4.489584][ T26] CFAR: c00000000062bb80 IRQMASK: 0
[ 4.489584][ T26] GPR00: c0000000005624d4 c000000004917860 c000000001cfc000 1800000000804a04
[ 4.489584][ T26] GPR04: c0000000003a2650 0000000000000cc0 c00000000000d3d8 c00000000000d3d8
[ 4.489584][ T26] GPR08: c0000000049175b0 a80e000000000000 0000000000000000 0000000017d78400
[ 4.489584][ T26] GPR12: 0000000044002204 c000000003790000 c00000000435003c c0000000043f1c40
[ 4.489584][ T26] GPR16: c0000000043f1c68 c0000000043501a0 c000000002106138 c0000000043f1c08
[ 4.489584][ T26] GPR20: c0000000043f1c10 c0000000043f1c20 c000000004146c40 c000000002fdb7f8
[ 4.489584][ T26] GPR24: c000000002fdb834 c000000003685e00 c000000004025030 c000000003522e90
[ 4.489584][ T26] GPR28: 0000000000000cc0 c0000000003a2650 c000000004025020 c000000004025020
[ 4.491201][ T26] NIP [c00000000062ec6c] .kasan_byte_accessible+0xc/0x20
[ 4.491430][ T26] LR [c00000000062bb84] .__kasan_check_byte+0x24/0x90
[ 4.491767][ T26] Call Trace:
[ 4.491941][ T26] [c000000004917860] [c00000000062ae70] .__kasan_kmalloc+0xc0/0x110 (unreliable)
[ 4.492270][ T26] [c0000000049178f0] [c0000000005624d4] .krealloc+0x54/0x1c0
[ 4.492453][ T26] [c000000004917990] [c0000000003a2650] .create_trace_option_files+0x280/0x530
[ 4.492613][ T26] [c000000004917a90] [c000000002050d90] .tracer_init_tracefs_work_func+0x274/0x2c0
[ 4.492771][ T26] [c000000004917b40] [c0000000001f9948] .process_one_work+0x578/0x9f0
[ 4.492927][ T26] [c000000004917c30] [c0000000001f9ebc] .worker_thread+0xfc/0x950
[ 4.493084][ T26] [c000000004917d60] [c00000000020be84] .kthread+0x1a4/0x1b0
[ 4.493232][ T26] [c000000004917e10] [c00000000000d3d8] .ret_from_kernel_thread+0x58/0x60
[ 4.495642][ T26] Code: 60000000 7cc802a6 38a00000 4bfffc78 60000000 7cc802a6 38a00001 4bfffc68 60000000 3d20a80e 7863e8c2 792907c6 <7c6348ae> 20630007 78630fe0 68630001
[ 4.496704][ T26] ---[ end trace 0000000000000000 ]---
The Oops is due to kasan_byte_accessible() not checking the readiness of
KASAN. Add missing call to kasan_arch_is_ready() and bail out when not
ready. The same problem is observed with ____kasan_kfree_large() so fix
it the same.
Also, as KASAN is not available and no shadow area is allocated for linear
memory mapping, there is no point in allocating shadow mem for vmalloc
memory as shown below in /sys/kernel/debug/kernel_page_tables
---[ kasan shadow mem start ]---
0xc00f000000000000-0xc00f00000006ffff 0x00000000040f0000 448K r w pte valid present dirty accessed
0xc00f000000860000-0xc00f00000086ffff 0x000000000ac10000 64K r w pte valid present dirty accessed
0xc00f3ffffffe0000-0xc00f3fffffffffff 0x0000000004d10000 128K r w pte valid present dirty accessed
---[ kasan shadow mem end ]---
So, also verify KASAN readiness before allocating and poisoning
shadow mem for VMAs.
Link: https://lkml.kernel.org/r/150768c55722311699fdcf8f5379e8256749f47d.1674716617.git.christophe.leroy@csgroup.eu
Fixes: 41b7a347bf14 ("powerpc: Book3S 64-bit outline-only KASAN support")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reported-by: Nathan Lynch <nathanl@linux.ibm.com>
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Cc: <stable@vger.kernel.org> [5.19+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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https://gitlab.freedesktop.org/agd5f/linux into drm-fixes
amd-drm-fixes-6.2-2023-02-09:
amdgpu:
- Add a parameter to disable S/G display
- Re-enable S/G display on all DCNs
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230209174504.7577-1-alexander.deucher@amd.com
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- Display watermark fix (Ville)
- fbdev fix for PSR, FBC, DRRS (Jouni)
- Move fd_install after last use of fence (Rob)
- Initialize the obj flags for shmem objects (Aravind)
- Fix VBT DSI DVO port handling (Ville)
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y+UZ0rh2YlhTrE4t@intel.com
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
A fix for a circular refcounting in drm/client, one for a memory leak in
amdgpu and a virtio fence fix when interrupted
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230209083600.7hi6roht6xxgldgz@houat
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Add the description of @pcc_ss_id in pcc_data_alloc().
Add the description of @cpu_num in cppc_get_transition_latency().
clear the below warnings:
drivers/acpi/cppc_acpi.c:607: warning: Function parameter or member 'pcc_ss_id' not described in 'pcc_data_alloc'
drivers/acpi/cppc_acpi.c:1616: warning: Function parameter or member 'cpu_num' not described in 'cppc_get_transition_latency'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3983
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
[ rjw: Dropped redundant empty code lines, minor edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.
Take advantage of this to constify the structure definitions to prevent
modification at runtime.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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In some use cases, it is desirable to only inject idle on certain set
of CPUs. For example on Alder Lake systems, it is possible that we force
idle only on P-Cores for thermal reasons. Also the idle percent can be
more than 50% if we only choose partial set of CPUs in the system.
Introduce 2 new module parameters for this purpose. They can be only
changed when the cooling device is inactive.
cpumask (Read/Write): A bit mask of CPUs to inject idle. The format of
this bitmask is same as used in other subsystems like in
/proc/irq/*/smp_affinity. The mask is comma separated 32 bit groups.
Each CPU is one bit. For example for 256 CPU system the full mask is:
ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff,ffffffff
The rightmost mask is for CPU 0-32.
max_idle (Read/Write): Maximum injected idle time to the total CPU time
ratio in percent range from 1 to 100. Even if the cooling device max_state
is always 100 (100%), this parameter allows to add a max idle percent
limit. The default is 50, to match the current implementation of powerclamp
driver. Also doesn't allow value more than 75, if the cpumask includes
every CPU present in the system.
Also when the cpumask doesn't include every CPU, there is no use of
compensation using package C-state idle counters. Hence don't start
package C-state polling thread even for a single package or a single die
system in this case.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Create a folder "thermal" under Documentation/admin-guide and move
intel_powerclamp documentation to this folder.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Some ARMv4 processors don't support suspend, which leads
to a build failure with the tegra and qualcomm cpuidle driver:
WARNING: unmet direct dependencies detected for ARM_CPU_SUSPEND
Depends on [n]: ARCH_SUSPEND_POSSIBLE [=n]
Selected by [y]:
- ARM_TEGRA_CPUIDLE [=y] && CPU_IDLE [=y] && (ARM [=y] || ARM64) && (ARCH_TEGRA [=n] || COMPILE_TEST [=y]) && !ARM64 && MMU [=y]
arch/arm/kernel/sleep.o: in function `__cpu_suspend':
(.text+0x68): undefined reference to `cpu_sa110_suspend_size'
(.text+0x68): undefined reference to `cpu_fa526_suspend_size'
Add an explicit dependency to make randconfig builds avoid
this combination.
Fixes: faae6c9f2e68 ("cpuidle: tegra: Enable compile testing")
Fixes: a871be6b8eee ("cpuidle: Convert Qualcomm SPM driver to a generic CPUidle driver")
Link: https://lore.kernel.org/all/20211013160125.772873-1-arnd@kernel.org/
Cc: All applicable <stable@vger.kernel.org>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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In commit 588a513d3425 ("arm64: Fix race condition on PG_dcache_clean
in __sync_icache_dcache()"), we found RISC-V has the same issue as the
previous arm64. The previous implementation didn't guarantee the correct
sequence of operations, which means flush_icache_all() hasn't been
called when the PG_dcache_clean was set. That would cause a risk of page
synchronization.
Fixes: 08f051eda33b ("RISC-V: Flush I$ when making a dirty page executable")
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230127035306.1819561-1-guoren@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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Follow the advice in Documentation/filesystems/sysfs.rst that show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The current kprobe would cause a misaligned load for the probe point.
This patch fixup it with two half-word loads instead.
Fixes: c22b0bcb1dd0 ("riscv: Add kprobes supported")
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
Link: https://lore.kernel.org/linux-riscv/878rhig9zj.fsf@all.your.base.are.belong.to.us/
Reported-by: Bjorn Topel <bjorn.topel@gmail.com>
Reviewed-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20230204063531.740220-1-guoren@kernel.org
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
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When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic
at once.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Since commit ee6d3dd4ed48 ("driver core: make kobj_type constant.")
the driver core allows the usage of const struct kobj_type.
Take advantage of this to constify the structure definition to prevent
modification at runtime.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The remove function first frees the clks and only then calls
cpufreq_unregister_driver(). If one of the cpufreq callbacks is called
just before cpufreq_unregister_driver() is run, the freed clks might be
used.
Fixes: 6601b8030de3 ("davinci: add generic CPUFreq driver for DaVinci")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The new epp support causes warnings about three separate
but related bugs:
1) failing before allocation should just return an error:
drivers/cpufreq/amd-pstate.c:951:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
if (!dev)
^~~~
drivers/cpufreq/amd-pstate.c:1018:9: note: uninitialized use occurs here
return ret;
^~~
2) wrong variable to store return code:
drivers/cpufreq/amd-pstate.c:963:6: error: variable 'ret' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
if (rc)
^~
drivers/cpufreq/amd-pstate.c:1019:9: note: uninitialized use occurs here
return ret;
^~~
drivers/cpufreq/amd-pstate.c:963:2: note: remove the 'if' if its condition is always false
if (rc)
^~~~~~~
3) calling amd_pstate_set_epp() in cleanup path after determining
that it should not be called:
drivers/cpufreq/amd-pstate.c:1055:6: error: variable 'epp' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized]
if (cpudata->epp_policy == cpudata->policy)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/cpufreq/amd-pstate.c:1080:30: note: uninitialized use occurs here
amd_pstate_set_epp(cpudata, epp);
^~~
All three are trivial to fix, but most likely there are additional bugs
in this function when the error handling was not really tested.
Fixes: ffa5096a7c33 ("cpufreq: amd-pstate: implement Pstate EPP support for the AMD processors")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Wyes Karny <wyes.karny@amd.com>
Reviewed-by: Yuan Perry <Perry.Yuan@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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All but a few drivers ignore the return value of
cpufreq_unregister_driver(). Those few that don't only call it after
cpufreq_register_driver() succeeded, in which case the call doesn't
fail.
Make the function return no value and add a WARN_ON for the case that
the function is called in an invalid situation (i.e. without a previous
successful call to cpufreq_register_driver()).
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com> # brcmstb-avs-cpufreq.c
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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When calling debugfs_lookup() the result must have dput() called on it,
otherwise the memory will leak over time. To make things simpler, just
call debugfs_lookup_and_remove() instead which handles all of the logic at
once.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230202151214.2306822-1-gregkh@linuxfoundation.org
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This reverts commit cbc29f107e51b1cc7d1e7b0bbe0691a1224205f1.
Get rid of the following smatch warnings:
arch/s390/include/asm/mem_detect.h:86 get_mem_detect_end() error: uninitialized symbol 'end'.
arch/s390/include/asm/mem_detect.h:86 get_mem_detect_end() error: uninitialized symbol 'end'.
arch/s390/boot/vmem.c:256 setup_vmem() error: uninitialized symbol 'start'.
arch/s390/boot/vmem.c:258 setup_vmem() error: uninitialized symbol 'end'.
Note that there is no bug in the code. This is purely to silence smatch.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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arch_cpu_idle_time() returns the idle time of any given cpu if it is in
idle, or zero if not. All if this is racy and partially incorrect. Time
stamps taken with store clock extended and store clock fast from different
cpus are compared, while the architecture states that this is nothing which
can be relied on (see Principles of Operation; Chapter 4, "Setting and
Inspecting the Clock").
A more fundamental problem is that the timestamp when a cpu is leaving idle
is taken early in the assembler part of the interrupt handler, and this
value is only transferred many cycles later to the cpu's per-cpu idle data
structure.
This per cpu data structure is read by arch_cpu_idle() to tell for which
period of time a remote cpu is idle: if only an idle_enter value is
present, the assumed idle time of the cpu is calculated by taking a local
timestamp and returning the difference of the local timestamp and the
idle_enter value. This is potentially incorrect, since the remote cpu may
have already left idle, but the taken timestamp may not have been
transferred to the per-cpu data structure. This in turn means that too much
idle time may be reported for a cpu, and a subsequent calculation of system
idle time may result in a smaller value.
Instead of coming up with even more complex code trying to fix this, just
remove this code, and only account idle time of a cpu, after idle state is
left.
Another minor bug is that it is assumed that timestamps are non-zero, which
is not necessarily the case for timestamps taken with store clock
fast. This however is just a very minor problem, since this can only happen
when the epoch increases.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Use simple assignments to access __vector128 members instead of hard
to read casts.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Add 64 and 128 bit members to __vector128 struct in order to allow reading
of the complete value, or the higher or lower part of vector register
contents instead of having to use casts.
Add an explicit __aligned(4) statement to avoid that the alignment of the
structure changes from 4 to 8. This should make sure that no breakage
happens because of this change.
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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The diag288_wdt watchdog driver is s390 specific.
Document who is responsible for this driver.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Storage Class Memory driver support for s390 architecture has been there
for a while. The original author of this work, Sebastian Ott has left IBM
and I am taking over this module. Adding myself as the upstream maintainer
for SCM on s390 architecture.
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Acked-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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arch_cpu_idle() is marked noinstr and therefore must only call functions
which are also not instrumented.
Make sure that cpu flag helper functions are always inlined to avoid that
the compiler generates an out-of-line function for e.g. the call within
arch_cpu_idle().
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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linux-next commit ("cpuidle: tracing: Warn about !rcu_is_watching()")
adds a new warning which hits on s390's arch_cpu_idle() function:
RCU not on for: arch_cpu_idle+0x0/0x28
WARNING: CPU: 2 PID: 0 at include/linux/trace_recursion.h:162 arch_ftrace_ops_list_func+0x24c/0x258
Modules linked in:
CPU: 2 PID: 0 Comm: swapper/2 Not tainted 6.2.0-rc6-next-20230202 #4
Hardware name: IBM 8561 T01 703 (z/VM 7.3.0)
Krnl PSW : 0404d00180000000 00000000002b55c0 (arch_ftrace_ops_list_func+0x250/0x258)
R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:1 PM:0 RI:0 EA:3
Krnl GPRS: c0000000ffffbfff 0000000080000002 0000000000000026 0000000000000000
0000037ffffe3a28 0000037ffffe3a20 0000000000000000 0000000000000000
0000000000000000 0000000000f4acf6 00000000001044f0 0000037ffffe3cb0
0000000000000000 0000000000000000 00000000002b55bc 0000037ffffe3bb8
Krnl Code: 00000000002b55b0: c02000840051 larl %r2,0000000001335652
00000000002b55b6: c0e5fff512d1 brasl %r14,0000000000157b58
#00000000002b55bc: af000000 mc 0,0
>00000000002b55c0: a7f4ffe7 brc 15,00000000002b558e
00000000002b55c4: 0707 bcr 0,%r7
00000000002b55c6: 0707 bcr 0,%r7
00000000002b55c8: eb6ff0480024 stmg %r6,%r15,72(%r15)
00000000002b55ce: b90400ef lgr %r14,%r15
Call Trace:
[<00000000002b55c0>] arch_ftrace_ops_list_func+0x250/0x258
([<00000000002b55bc>] arch_ftrace_ops_list_func+0x24c/0x258)
[<0000000000f5f0fc>] ftrace_common+0x1c/0x20
[<00000000001044f6>] arch_cpu_idle+0x6/0x28
[<0000000000f4acf6>] default_idle_call+0x76/0x128
[<00000000001cc374>] do_idle+0xf4/0x1b0
[<00000000001cc6ce>] cpu_startup_entry+0x36/0x40
[<0000000000119d00>] smp_start_secondary+0x140/0x150
[<0000000000f5d2ae>] restart_int_handler+0x6e/0x90
Mark arch_cpu_idle() noinstr like all other architectures with
CONFIG_ARCH_WANTS_NO_INSTR (should) have it to fix this.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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There is no reason to do idle time accounting in arch_cpu_idle().
Do idle time accounting in account_idle_time_irq(), where it belongs
to. The accounted values don't change between account_idle_time_irq() and
arch_cpu_idle(); so the result is the same.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
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After the switch to use the powercap/idle-inject framework in the Intel
powerclamp driver, the idle duration unit is microsecond.
However, the module parameter for idle duration is in milliseconds, so
convert it to microseconds in the "set" callback and back to milliseconds
in a new "get" callback.
While here, also use mutex protection for setting and getting "duration".
The other uses of "duration" are already protected by the mutex.
Fixes: 8526eb7fc75a ("thermal: intel: powerclamp: Use powercap idle-inject feature")
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fix from Rafael Wysocki:
"Fix the incorrect value returned by cpufreq driver's ->get() callback
for Qualcomm platforms (Douglas Anderson)"
* tag 'pm-6.2-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq: qcom-hw: Fix cpufreq_driver->get() for non-LMH systems
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