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Pre-allocates buffers sufficient for the maximum supported MTU (2026) in
order to eliminate the possibility of resource exhaustion when changing the
MTU while the device is up.
Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The tipc prefix for log messages generated by tipc was
removed in commit 07f6c4bc048a ("tipc: convert tipc reference
table to use generic rhashtable").
This is still a useful prefix so add it back.
Signed-off-by: Matt Bennett <matt.bennett@alliedtelesis.co.nz>
Acked-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://people.freedesktop.org/~agd5f/linux into drm-fixes
drm-fixes-5.4-2019-11-14:
amdgpu:
- Fix a potential crash in firmware parsing
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191114221354.3914-1-alexander.deucher@amd.com
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git://anongit.freedesktop.org/drm/drm-misc into drm-fixes
- One fix to the dotclock dividers range for sun4i
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20191113142645.GA967172@gilmour.lan
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git://anongit.freedesktop.org/drm/drm-intel into drm-fixes
- MOCS table fixes for EHL and TGL
- Update Display's rawclock on resume
- GVT's dmabuf reference drop fix
Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191114055302.GA3564@intel.com
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As it is consistent with prefixes of other write life time hints.
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
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As it is consistent with prefixes of other write life time hints.
Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
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v2: declare as (struct common_firmware_header *) type because
struct xxx_firmware_header inherits from it
When CE's ucode_id(8) is used to get sdma_hdr, we will be accessing an
unallocated amdgpu_firmware_info instance.
This issue appears on rhel7.7 with gcc 4.8.5. Newer compilers might have
optimized out such 'defined but not referenced' variable.
[ 1120.798564] BUG: unable to handle kernel NULL pointer dereference at 000000000000000a
[ 1120.806703] IP: [<ffffffffc0e3c9b3>] psp_np_fw_load+0x1e3/0x390 [amdgpu]
[ 1120.813693] PGD 80000002603ff067 PUD 271b8d067 PMD 0
[ 1120.818931] Oops: 0000 [#1] SMP
[ 1120.822245] Modules linked in: amdgpu(OE+) amdkcl(OE) amd_iommu_v2 amdttm(OE) amd_sched(OE) xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun bridge stp llc devlink ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 xt_conntrack ebtable_nat ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_security iptable_raw nf_conntrack libcrc32c ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter sunrpc dm_mirror dm_region_hash dm_log dm_mod intel_pmc_core intel_powerclamp coretemp intel_rapl joydev kvm_intel eeepc_wmi asus_wmi kvm sparse_keymap iTCO_wdt irqbypass rfkill crc32_pclmul snd_hda_codec_realtek mxm_wmi ghash_clmulni_intel intel_wmi_thunderbolt iTCO_vendor_support snd_hda_codec_generic snd_hda_codec_hdmi aesni_intel lrw gf128mul glue_helper ablk_helper sg cryptd pcspkr snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd pinctrl_sunrisepoint pinctrl_intel soundcore acpi_pad mei_me wmi mei i2c_i801 pcc_cpufreq ip_tables ext4 mbcache jbd2 sd_mod crc_t10dif crct10dif_generic i915 i2c_algo_bit iosf_mbi drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt fb_sys_fops ahci libahci drm ptp libata crct10dif_pclmul crct10dif_common crc32c_intel serio_raw pps_core drm_panel_orientation_quirks video i2c_hid
[ 1120.954136] CPU: 4 PID: 2426 Comm: modprobe Tainted: G OE ------------ 3.10.0-1062.el7.x86_64 #1
[ 1120.964390] Hardware name: System manufacturer System Product Name/Z170-A, BIOS 1302 11/09/2015
[ 1120.973321] task: ffff991ef1e3c1c0 ti: ffff991ee625c000 task.ti: ffff991ee625c000
[ 1120.981020] RIP: 0010:[<ffffffffc0e3c9b3>] [<ffffffffc0e3c9b3>] psp_np_fw_load+0x1e3/0x390 [amdgpu]
[ 1120.990483] RSP: 0018:ffff991ee625f950 EFLAGS: 00010202
[ 1120.995935] RAX: 0000000000000002 RBX: ffff991edf6b2d38 RCX: ffff991edf6a0000
[ 1121.003391] RDX: 0000000000000000 RSI: ffff991f01d13898 RDI: ffffffffc110afb3
[ 1121.010706] RBP: ffff991ee625f9b0 R08: 0000000000000000 R09: 0000000000000000
[ 1121.018029] R10: 00000000000004c4 R11: ffff991ee625f64e R12: ffff991edf6b3220
[ 1121.025353] R13: ffff991edf6a0000 R14: 0000000000000008 R15: ffff991edf6b2d30
[ 1121.032666] FS: 00007f97b0c0b740(0000) GS:ffff991f01d00000(0000) knlGS:0000000000000000
[ 1121.041000] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1121.046880] CR2: 000000000000000a CR3: 000000025e604000 CR4: 00000000003607e0
[ 1121.054239] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1121.061631] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1121.068938] Call Trace:
[ 1121.071494] [<ffffffffc0e3dba8>] psp_hw_init+0x218/0x270 [amdgpu]
[ 1121.077886] [<ffffffffc0da3188>] amdgpu_device_fw_loading+0xe8/0x160 [amdgpu]
[ 1121.085296] [<ffffffffc0e3b34c>] ? vega10_ih_irq_init+0x4bc/0x730 [amdgpu]
[ 1121.092534] [<ffffffffc0da5c75>] amdgpu_device_init+0x1495/0x1c90 [amdgpu]
[ 1121.099675] [<ffffffffc0da9cab>] amdgpu_driver_load_kms+0x8b/0x2f0 [amdgpu]
[ 1121.106888] [<ffffffffc01b25cf>] drm_dev_register+0x12f/0x1d0 [drm]
[ 1121.113419] [<ffffffffa4dcdfd8>] ? pci_enable_device_flags+0xe8/0x140
[ 1121.120183] [<ffffffffc0da260a>] amdgpu_pci_probe+0xca/0x170 [amdgpu]
[ 1121.126919] [<ffffffffa4dcf97a>] local_pci_probe+0x4a/0xb0
[ 1121.132622] [<ffffffffa4dd10c9>] pci_device_probe+0x109/0x160
[ 1121.138607] [<ffffffffa4eb4205>] driver_probe_device+0xc5/0x3e0
[ 1121.144766] [<ffffffffa4eb4603>] __driver_attach+0x93/0xa0
[ 1121.150507] [<ffffffffa4eb4570>] ? __device_attach+0x50/0x50
[ 1121.156422] [<ffffffffa4eb1da5>] bus_for_each_dev+0x75/0xc0
[ 1121.162213] [<ffffffffa4eb3b7e>] driver_attach+0x1e/0x20
[ 1121.167771] [<ffffffffa4eb3620>] bus_add_driver+0x200/0x2d0
[ 1121.173590] [<ffffffffa4eb4c94>] driver_register+0x64/0xf0
[ 1121.179345] [<ffffffffa4dd0905>] __pci_register_driver+0xa5/0xc0
[ 1121.185593] [<ffffffffc099f000>] ? 0xffffffffc099efff
[ 1121.190914] [<ffffffffc099f0a4>] amdgpu_init+0xa4/0xb0 [amdgpu]
[ 1121.197101] [<ffffffffa4a0210a>] do_one_initcall+0xba/0x240
[ 1121.202901] [<ffffffffa4b1c90a>] load_module+0x271a/0x2bb0
[ 1121.208598] [<ffffffffa4dad740>] ? ddebug_proc_write+0x100/0x100
[ 1121.214894] [<ffffffffa4b1ce8f>] SyS_init_module+0xef/0x140
[ 1121.220698] [<ffffffffa518bede>] system_call_fastpath+0x25/0x2a
[ 1121.226870] Code: b4 01 60 a2 00 00 31 c0 e8 83 60 33 e4 41 8b 47 08 48 8b 4d d0 48 c7 c7 b3 af 10 c1 48 69 c0 68 07 00 00 48 8b 84 01 60 a2 00 00 <48> 8b 70 08 31 c0 48 89 75 c8 e8 56 60 33 e4 48 8b 4d d0 48 c7
[ 1121.247422] RIP [<ffffffffc0e3c9b3>] psp_np_fw_load+0x1e3/0x390 [amdgpu]
[ 1121.254432] RSP <ffff991ee625f950>
[ 1121.258017] CR2: 000000000000000a
[ 1121.261427] ---[ end trace e98b35387ede75bd ]---
Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Fixes: c5fb912653dae3f878 ("drm/amdgpu: add firmware header printing for psp fw loading (v2)")
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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The driver misses calling destroy_workqueue in remove like what is done
when probe fails.
Add the missed calls to fix it.
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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There is a bug that checking the same active_list over and over again
in iocg_activate(). The intention of the code was checking whether all
the ancestors and self have already been activated. So fix it.
Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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One of the obvious use cases for these commands is networking, where
it's not uncommon to have tons of sockets open and polled for. The
current implementation uses a list for insertion and lookup, which works
fine for file based use cases where the count is usually low, it breaks
down somewhat for higher number of files / sockets. A test case with
30k sockets being polled for and cancelled takes:
real 0m6.968s
user 0m0.002s
sys 0m6.936s
with the patch it takes:
real 0m0.233s
user 0m0.010s
sys 0m0.176s
If you go to 50k sockets, it gets even more abysmal with the current
code:
real 0m40.602s
user 0m0.010s
sys 0m40.555s
with the patch it takes:
real 0m0.398s
user 0m0.000s
sys 0m0.341s
Change is pretty straight forward, just replace the cancel_list with
a red/black tree instead.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Some versions of gcc (so far 6.3 and 7.4) throw a warning:
drivers/block/rbd.c: In function 'rbd_object_map_callback':
drivers/block/rbd.c:2124:21: warning: 'current_state' may be used uninitialized in this function [-Wmaybe-uninitialized]
(current_state == OBJECT_EXISTS && state == OBJECT_EXISTS_CLEAN))
drivers/block/rbd.c:2092:23: note: 'current_state' was declared here
u8 state, new_state, current_state;
^~~~~~~~~~~~~
It's bogus because all current_state accesses are guarded by
has_current_state.
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Dongsheng Yang <dongsheng.yang@easystack.cn>
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Ceph can in some cases issue an async DIO request, in which case we can
end up calling ceph_end_io_direct before the I/O is actually complete.
That may allow buffered operations to proceed while DIO requests are
still in flight.
Fix this by incrementing the i_dio_count when issuing an async DIO
request, and decrement it when tearing down the aio_req.
Fixes: 321fe13c9398 ("ceph: add buffered/direct exclusionary locking for reads and writes")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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Most of the time, we (or the vfs layer) takes the inode_lock and then
acquires caps, but ceph_read_iter does the opposite, and that can lead
to a deadlock.
When there are multiple clients treading over the same data, we can end
up in a situation where a reader takes caps and then tries to acquire
the inode_lock. Another task holds the inode_lock and issues a request
to the MDS which needs to revoke the caps, but that can't happen until
the inode_lock is unwedged.
Fix this by having ceph_read_iter take the inode_lock earlier, before
attempting to acquire caps.
Fixes: 321fe13c9398 ("ceph: add buffered/direct exclusionary locking for reads and writes")
Link: https://tracker.ceph.com/issues/36348
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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The recently introduced unit descriptor validation had some bug for
processing and extension units, it counts a bControlSize byte twice so
it expected a bigger size than it should have been. This seems
resulting in a probe error on a few devices.
Fix the calculation for proper checks of PU and EU.
Fixes: 57f8770620e9 ("ALSA: usb-audio: More validations of descriptor units")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191114165613.7422-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- fix build error when compiling SPARC VDSO with CONFIG_COMPAT=y
- pass correct --arch option to Sparse
* tag 'kbuild-fixes-v5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: tell sparse about the $ARCH
sparc: vdso: fix build error of vdso32
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Pull RDMA fixes from Jason Gunthorpe:
"Bug fixes for old bugs in the hns and hfi1 drivers:
- Calculate various values in hns properly to avoid over/underflows
in some cases
- Fix an oops, PCI negotiation on Gen4 systems, and bugs related to
retries"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/hns: Correct the value of srq_desc_size
RDMA/hns: Correct the value of HNS_ROCE_HEM_CHUNK_LEN
IB/hfi1: TID RDMA WRITE should not return IB_WC_RNR_RETRY_EXC_ERR
IB/hfi1: Calculate flow weight based on QP MTU for TID RDMA
IB/hfi1: Ensure r_tid_ack is valid before building TID RDMA ACK packet
IB/hfi1: Ensure full Gen3 speed in a Gen4 system
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Acquire the per-VM slots_lock when zapping all shadow pages as part of
toggling nx_huge_pages. The fast zap algorithm relies on exclusivity
(via slots_lock) to identify obsolete vs. valid shadow pages, because it
uses a single bit for its generation number. Holding slots_lock also
obviates the need to acquire a read lock on the VM's srcu.
Failing to take slots_lock when toggling nx_huge_pages allows multiple
instances of kvm_mmu_zap_all_fast() to run concurrently, as the other
user, KVM_SET_USER_MEMORY_REGION, does not take the global kvm_lock.
(kvm_mmu_zap_all_fast() does take kvm->mmu_lock, but it can be
temporarily dropped by kvm_zap_obsolete_pages(), so it is not enough
to enforce exclusivity).
Concurrent fast zap instances causes obsolete shadow pages to be
incorrectly identified as valid due to the single bit generation number
wrapping, which results in stale shadow pages being left in KVM's MMU
and leads to all sorts of undesirable behavior.
The bug is easily confirmed by running with CONFIG_PROVE_LOCKING and
toggling nx_huge_pages via its module param.
Note, until commit 4ae5acbc4936 ("KVM: x86/mmu: Take slots_lock when
using kvm_mmu_zap_all_fast()", 2019-11-13) the fast zap algorithm used
an ulong-sized generation instead of relying on exclusivity for
correctness, but all callers except the recently added set_nx_huge_pages()
needed to hold slots_lock anyways. Therefore, this patch does not have
to be backported to stable kernels.
Given that toggling nx_huge_pages is by no means a fast path, force it
to conform to the current approach instead of reintroducing the previous
generation count.
Fixes: b8e8c8303ff28 ("kvm: mmu: ITLB_MULTIHIT mitigation", but NOT FOR STABLE)
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Sparse uses the same executable for all archs and uses flags
like -m64, -mbig-endian or -D__arm__ for arch-specific parameters.
But Sparse also uses value from the host machine used to build
Sparse as default value for the target machine.
This works, of course, well for native build but can create
problems when cross-compiling, like defining both '__i386__'
and '__arm__' when cross-compiling for arm on a x86-64 machine.
Fix this by explicitely telling sparse the target architecture.
Reported-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Since commit 54b8ae66ae1a ("kbuild: change *FLAGS_<basetarget>.o to
take the path relative to $(obj)"), sparc allmodconfig fails to build
as follows:
CC arch/sparc/vdso/vdso32/vclock_gettime.o
unrecognized e_machine 18 arch/sparc/vdso/vdso32/vclock_gettime.o
arch/sparc/vdso/vdso32/vclock_gettime.o: failed
The cause of the breakage is that -pg flag not being dropped.
The vdso32 files are located in the vdso32/ subdirectory, but I missed
to update the Makefile.
I removed the meaningless CFLAGS_REMOVE_vdso-note.o since it is only
effective for C file.
vdso-note.o is compiled from assembly file:
arch/sparc/vdso/vdso-note.S
arch/sparc/vdso/vdso32/vdso-note.S
Fixes: 54b8ae66ae1a ("kbuild: change *FLAGS_<basetarget>.o to take the path relative to $(obj)")
Reported-by: Anatoly Pugachev <matorola@gmail.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Anatoly Pugachev <matorola@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
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Since we don't iterate these lists anymore after commit:
e61df66c69b1 ("io-wq: ensure free/busy list browsing see all items")
we don't need to retain the nulls value we use for them. That means it's
pretty pointless to wrap the hlist_nulls_head in a structure, so get rid
of it.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Since commit 3726112ec731 ("block, bfq: re-schedule empty queues if
they deserve I/O plugging"), to prevent the service guarantees of a
bfq_queue from being violated, the bfq_queue may be left busy, i.e.,
scheduled for service, even if empty (see comments in
__bfq_bfqq_expire() for details). But, if no process will send
requests to the bfq_queue any longer, then there is no point in
keeping the bfq_queue scheduled for service.
In addition, keeping the bfq_queue scheduled for service, but with no
process reference any longer, may cause the bfq_queue to be freed when
descheduled from service. But this is assumed to never happen, and
causes a UAF if it happens. This, in turn, caused crashes [1, 2].
This commit fixes this issue by descheduling an empty bfq_queue when
it remains with not process reference.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1767539
[2] https://bugzilla.kernel.org/show_bug.cgi?id=205447
Fixes: 3726112ec731 ("block, bfq: re-schedule empty queues if they deserve I/O plugging")
Reported-by: Chris Evich <cevich@redhat.com>
Reported-by: Patrick Dung <patdung100@gmail.com>
Reported-by: Thorsten Schubert <tschubert@bafh.org>
Tested-by: Thorsten Schubert <tschubert@bafh.org>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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The quirks2 are parsed and set (e.g. from DT) before the quirk for broken
HS200 is set in the driver.
The driver needs to enable just this flag, not rewrite the whole quirk set.
Fixes: 7871aa60ae00 ("mmc: sdhci-of-at91: add quirk for broken HS200")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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The commit 60849562a5db ("ALSA: usb-audio: Fix possible NULL
dereference at create_yamaha_midi_quirk()") added NULL checks in
create_yamaha_midi_quirk(), but there was an overlook. The code
allows one of either injd or outjd is NULL, but the second if check
made returning -ENODEV if any of them is NULL. Fix it in a proper
form.
Fixes: 60849562a5db ("ALSA: usb-audio: Fix possible NULL dereference at create_yamaha_midi_quirk()")
Reported-by: Pavel Machek <pavel@denx.de>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20191113111259.24123-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2019-11-14
here another pull request for net/master consisting of one patch (including my S-o-b).
Jouni Hogander's patch fixes a memory leak found by the syzbot in the slcan
driver's error path.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers
Kalle Valo says:
====================
wireless-drivers fixes for v5.4
Hopefully last fixes for v5.4, only one iwlwifi fix this time.
iwlwifi
* fix A-MSDU data corruption when using CCMP/GCMP ciphers
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This patch is fixing memory leak reported by Syzkaller:
BUG: memory leak unreferenced object 0xffff888067f65500 (size 4096):
comm "syz-executor043", pid 454, jiffies 4294759719 (age 11.930s)
hex dump (first 32 bytes):
73 6c 63 61 6e 30 00 00 00 00 00 00 00 00 00 00 slcan0..........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000a06eec0d>] __kmalloc+0x18b/0x2c0
[<0000000083306e66>] kvmalloc_node+0x3a/0xc0
[<000000006ac27f87>] alloc_netdev_mqs+0x17a/0x1080
[<0000000061a996c9>] slcan_open+0x3ae/0x9a0
[<000000001226f0f9>] tty_ldisc_open.isra.1+0x76/0xc0
[<0000000019289631>] tty_set_ldisc+0x28c/0x5f0
[<000000004de5a617>] tty_ioctl+0x48d/0x1590
[<00000000daef496f>] do_vfs_ioctl+0x1c7/0x1510
[<0000000059068dbc>] ksys_ioctl+0x99/0xb0
[<000000009a6eb334>] __x64_sys_ioctl+0x78/0xb0
[<0000000053d0332e>] do_syscall_64+0x16f/0x580
[<0000000021b83b99>] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[<000000008ea75434>] 0xffffffffffffffff
Cc: Wolfgang Grandegger <wg@grandegger.com>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Jouni Hogander <jouni.hogander@unikie.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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For timeout requests and bunch of others io_uring tries to grab a file
with specified fd, which is usually stdin/fd=0.
Update io_op_needs_file()
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Makes the code easier to read.
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We don't use the return value anymore, drop it. Also drop the
unecessary double cancel_req value check.
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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We have two lists for workers in io-wq, a busy and a free list. For
certain operations we want to browse all workers, and we currently do
that by browsing the two separate lists. But since these lists are RCU
protected, we can potentially miss workers if they move between the two
lists while we're browsing them.
Add a third list, all_list, that simply holds all workers. A worker is
added to that list when it starts, and removed when it exits. This makes
the worker iteration cleaner, too.
Reported-by: Paul E. McKenney <paulmck@kernel.org>
Reviewed-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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A test case was reported where two linked reads with registered buffers
failed the second link always. This is because we set the expected value
of a request in req->result, and if we don't get this result, then we
fail the dependent links. For some reason the registered buffer import
returned -ERROR/0, while the normal import returns -ERROR/length. This
broke linked commands with registered buffers.
Fix this by making io_import_fixed() correctly return the mapped length.
Cc: stable@vger.kernel.org # v5.3
Reported-by: 李通洲 <carter.li@eoitek.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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None of the exported bcache symbols are actually used anywhere.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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There is no block directory this file needs includes from.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In bch_mca_scan(), the number of shrinking btree node is calculated
by code like this,
unsigned long nr = sc->nr_to_scan;
nr /= c->btree_pages;
nr = min_t(unsigned long, nr, mca_can_free(c));
variable sc->nr_to_scan is number of objects (here is bcache B+tree
nodes' number) to shrink, and pointer variable sc is sent from memory
management code as parametr of a callback.
If sc->nr_to_scan is smaller than c->btree_pages, after the above
calculation, variable 'nr' will be 0 and nothing will be shrunk. It is
frequeently observed that only 1 or 2 is set to sc->nr_to_scan and make
nr to be zero. Then bch_mca_scan() will do nothing more then acquiring
and releasing mutex c->bucket_lock.
This patch checkes whether nr is 0 after the above calculation, if 0
is the result then set 1 to variable 'n'. Then at least bch_mca_scan()
will try to shrink a single B+tree node.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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For writeback mode, if there is no regular I/O request for a while,
the writeback rate will be set to the maximum value (1TB/s for now).
This is good for most of the storage workload, but there are still
people don't what the maximum writeback rate in I/O idle time.
This patch adds a sysfs interface file idle_max_writeback_rate to
permit people to disable maximum writeback rate. Then the minimum
writeback rate can be advised by writeback_rate_minimum in the
bcache device's sysfs interface.
Reported-by: Christian Balzer <chibi@gol.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This patch adds code comments in bch_btree_leaf_dirty() to explain
why w->journal should always reference the eldest journal pin of
all the writing bkeys in the btree node. To make the bcache journal
code to be easier to be understood.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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bcache_allocator can call the following:
bch_allocator_thread()
-> bch_prio_write()
-> bch_bucket_alloc()
-> wait on &ca->set->bucket_wait
But the wake up event on bucket_wait is supposed to come from
bch_allocator_thread() itself => deadlock:
[ 1158.490744] INFO: task bcache_allocato:15861 blocked for more than 10 seconds.
[ 1158.495929] Not tainted 5.3.0-050300rc3-generic #201908042232
[ 1158.500653] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 1158.504413] bcache_allocato D 0 15861 2 0x80004000
[ 1158.504419] Call Trace:
[ 1158.504429] __schedule+0x2a8/0x670
[ 1158.504432] schedule+0x2d/0x90
[ 1158.504448] bch_bucket_alloc+0xe5/0x370 [bcache]
[ 1158.504453] ? wait_woken+0x80/0x80
[ 1158.504466] bch_prio_write+0x1dc/0x390 [bcache]
[ 1158.504476] bch_allocator_thread+0x233/0x490 [bcache]
[ 1158.504491] kthread+0x121/0x140
[ 1158.504503] ? invalidate_buckets+0x890/0x890 [bcache]
[ 1158.504506] ? kthread_park+0xb0/0xb0
[ 1158.504510] ret_from_fork+0x35/0x40
Fix by making the call to bch_prio_write() non-blocking, so that
bch_allocator_thread() never waits on itself.
Moreover, make sure to wake up the garbage collector thread when
bch_prio_write() is failing to allocate buckets.
BugLink: https://bugs.launchpad.net/bugs/1784665
BugLink: https://bugs.launchpad.net/bugs/1796292
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This patch adds simple code comments for bch_keylist_pop() and
bch_keylist_pop_front() in bset.c, to make the code more easier to
be understand.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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In request.c:bch_data_insert_keys(), there is code comment for a piece
of dead code. This patch deletes the dead code and its code comment
since they are useless in practice.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Previous code only returns "Not a bcache superblock" for both bcache
super block offset and magic error. This patch addss more accurate error
messages,
- for super block unmatched offset:
"Not a bcache superblock (bad offset)"
- for super block unmatched magic number:
"Not a bcache superblock (bad magic)"
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Commit cafe56359144 ("bcache: A block layer cache") leads to the
following static checker warning:
./drivers/md/bcache/super.c:770 bcache_device_free()
warn: variable dereferenced before check 'd->disk' (see line 766)
drivers/md/bcache/super.c
762 static void bcache_device_free(struct bcache_device *d)
763 {
764 lockdep_assert_held(&bch_register_lock);
765
766 pr_info("%s stopped", d->disk->disk_name);
^^^^^^^^^
Unchecked dereference.
767
768 if (d->c)
769 bcache_device_detach(d);
770 if (d->disk && d->disk->flags & GENHD_FL_UP)
^^^^^^^
Check too late.
771 del_gendisk(d->disk);
772 if (d->disk && d->disk->queue)
773 blk_cleanup_queue(d->disk->queue);
774 if (d->disk) {
775 ida_simple_remove(&bcache_device_idx,
776 first_minor_to_idx(d->disk->first_minor));
777 put_disk(d->disk);
778 }
779
It is not 100% sure that the gendisk struct of bcache device will always
be there, the warning makes sense when there is problem in block core.
This patch tries to remove the static checking warning by checking
d->disk to avoid NULL pointer deferences.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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This patch fix a lost wake-up problem caused by the race between
mca_cannibalize_lock and bch_cannibalize_unlock.
Consider two processes, A and B. Process A is executing
mca_cannibalize_lock, while process B takes c->btree_cache_alloc_lock
and is executing bch_cannibalize_unlock. The problem happens that after
process A executes cmpxchg and will execute prepare_to_wait. In this
timeslice process B executes wake_up, but after that process A executes
prepare_to_wait and set the state to TASK_INTERRUPTIBLE. Then process A
goes to sleep but no one will wake up it. This problem may cause bcache
device to dead.
Signed-off-by: Guoju Fang <fangguoju@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Fifo structure journal.pin is implemented by a cycle buffer, if the back
index reaches highest location of the cycle buffer, it will be swapped
to 0. Once the swapping happens, it means a smaller fifo index might be
associated to a newer journal entry. So the btree node with oldest
journal entry won't be selected in bch_btree_leaf_dirty() to reference
the dirty B+tree leaf node. This problem may cause bcache journal won't
protect unflushed oldest B+tree dirty leaf node in power failure, and
this B+tree leaf node is possible to beinconsistent after reboot from
power failure.
This patch fixes the fifo index comparing logic in journal_pin_cmp(),
to avoid potential corrupted B+tree leaf node when the back index of
journal pin is swapped.
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-5.5/drivers
Pull MD changes from Song.
* 'md-next' of git://git.kernel.org/pub/scm/linux/kernel/git/song/md:
md/raid10: prevent access of uninitialized resync_pages offset
md: avoid invalid memory access for array sb->dev_roles
md/raid1: avoid soft lockup under high load
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This code is supposed to test for negative error codes and partial
reads, but because sizeof() is size_t (unsigned) type then negative
error codes are type promoted to high positive values and the condition
doesn't work as expected.
Fixes: 332f989a3b00 ("CDC-NCM: handle incomplete transfer of MTU")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For timeout requests io_uring tries to grab a file with specified fd,
which is usually stdin/fd=0.
Update io_op_needs_file()
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into fixes
gpio fixes for v5.4-rc8
- fix debounce times in max776520 and bd70528
- fix parallel build of gpio tools
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The Terra Pad 1061 has the usual micro-USB-B id-pin handler, but instead
of controlling the actual micro-USB-B it turns the 5V boost for the
tablet's USB-A connector and its keyboard-cover connector off.
The actual micro-USB-B connector on the tablet is wired for charging only,
and its id pin is *not* connected to the GPIO which is used for the
(broken) id-pin event handler in the DSDT.
While at it not only add a comment why the Terra Pad 1061 is on the
blacklist, but also fix the missing comment for the Minix Neo Z83-4 entry.
Fixes: 61f7f7c8f978 ("gpiolib: acpi: Add gpiolib_acpi_run_edge_events_on_boot option and blacklist")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The bspec was just updated with a minor correction to entry 61 (it
shouldn't have had the SCF bit set).
v2:
- Add a MOCS_ENTRY_UNUSED() and use it to declare the
explicitly-reserved MOCS entries. (Lucas)
- Move the warning suppression from the Makefile to a #pragma that only
affects the TGL table. (Lucas)
v3:
- Entries 16 and 17 are identical to ICL now, so no need to explicitly
adjust them (or mess with compiler warning overrides).
Bspec: 45101
Fixes: 2ddf992179c4 ("drm/i915/tgl: Define MOCS entries for Tigerlake")
Cc: Tomasz Lis <tomasz.lis@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Francisco Jerez <francisco.jerez.plata@intel.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191112224757.25116-2-matthew.d.roper@intel.com
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Tomasz Lis <tomasz.lis@intel.com>
(cherry picked from commit bfb0e8e63d865559cc97af235aea583b7dcc235f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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