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Date: Fri, 17 May 2024 16:15:11 +0800
From: kernel test robot <oliver.sang@...el.com>
To: Chao Yu <chao@...nel.org>
CC: <oe-lkp@...ts.linux.dev>, <lkp@...el.com>,
<linux-f2fs-devel@...ts.sourceforge.net>, <jaegeuk@...nel.org>,
<linux-kernel@...r.kernel.org>, Chao Yu <chao@...nel.org>,
<oliver.sang@...el.com>
Subject: Re: [PATCH v2] f2fs: fix to avoid racing in between read and OPU dio
write
Hello,
kernel test robot noticed "WARNING:at_kernel/locking/rwsem.c:#down_read" on:
commit: abf7df61e5c60fed520a09102d576fd41ed4d5ee ("[PATCH v2] f2fs: fix to avoid racing in between read and OPU dio write")
url: https://github.com/intel-lab-lkp/linux/commits/Chao-Yu/f2fs-fix-to-avoid-racing-in-between-read-and-OPU-dio-write/20240510-104020
base: https://git.kernel.org/cgit/linux/kernel/git/jaegeuk/f2fs.git dev
patch link: https://lore.kernel.org/all/20240510023906.281700-1-chao@kernel.org/
patch subject: [PATCH v2] f2fs: fix to avoid racing in between read and OPU dio write
in testcase: xfstests
version: xfstests-x86_64-0e5c12df-1_20240511
with following parameters:
disk: 4HDD
fs: f2fs
test: generic-617
compiler: gcc-13
test machine: 4 threads Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz (Skylake) with 32G memory
(please refer to attached dmesg/kmsg for entire log/backtrace)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@...el.com>
| Closes: https://lore.kernel.org/oe-lkp/202405171532.760e22d3-oliver.sang@intel.com
[ 160.985543][ T2255] ------------[ cut here ]------------
[ 160.990864][ T2255] WARNING: CPU: 3 PID: 2255 at kernel/locking/rwsem.c:245 down_read (kernel/locking/rwsem.c:245 (discriminator 1) kernel/locking/rwsem.c:1249 (discriminator 1) kernel/locking/rwsem.c:1263 (discriminator 1) kernel/locking/rwsem.c:1528 (discriminator 1))
[ 160.999715][ T2255] Modules linked in: f2fs crc32_generic intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal btrfs intel_powerclamp blake2b_generic coretemp xor zstd_compress kvm_intel raid6_pq libcrc32c i915 kvm sd_mod t10_pi crc64_rocksoft_generic crct10dif_pclmul crc32_pclmul crc64_rocksoft crc64 crc32c_intel ghash_clmulni_intel sha512_ssse3 sg drm_buddy rapl ipmi_devintf intel_cstate intel_gtt ipmi_msghandler mei_wdt wmi_bmof intel_uncore i2c_i801 drm_display_helper i2c_smbus ahci ttm drm_kms_helper libahci video libata mei_me mei acpi_pad intel_pch_thermal wmi binfmt_misc loop fuse drm dm_mod ip_tables
[ 161.053654][ T2255] CPU: 3 PID: 2255 Comm: fsx Tainted: G I 6.9.0-rc1-00036-gabf7df61e5c6 #1
[ 161.063438][ T2255] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.1.1 10/07/2015
[ 161.071504][ T2255] RIP: 0010:down_read (kernel/locking/rwsem.c:245 (discriminator 1) kernel/locking/rwsem.c:1249 (discriminator 1) kernel/locking/rwsem.c:1263 (discriminator 1) kernel/locking/rwsem.c:1528 (discriminator 1))
[ 161.076376][ T2255] Code: b8 00 00 00 00 00 fc ff df 83 e3 02 48 c1 ea 03 4c 09 fb 48 83 cb 01 80 3c 02 00 0f 85 9a 00 00 00 48 89 5d 08 e9 50 ff ff ff <0f> 0b 4c 8d 7d 08 be 08 00 00 00 4c 89 ff e8 c1 59 e9 fd 4c 89 f8
All code
========
0: b8 00 00 00 00 mov $0x0,%eax
5: 00 fc add %bh,%ah
7: ff (bad)
8: df 83 e3 02 48 c1 filds -0x3eb7fd1d(%rbx)
e: ea (bad)
f: 03 4c 09 fb add -0x5(%rcx,%rcx,1),%ecx
13: 48 83 cb 01 or $0x1,%rbx
17: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
1b: 0f 85 9a 00 00 00 jne 0xbb
21: 48 89 5d 08 mov %rbx,0x8(%rbp)
25: e9 50 ff ff ff jmpq 0xffffffffffffff7a
2a:* 0f 0b ud2 <-- trapping instruction
2c: 4c 8d 7d 08 lea 0x8(%rbp),%r15
30: be 08 00 00 00 mov $0x8,%esi
35: 4c 89 ff mov %r15,%rdi
38: e8 c1 59 e9 fd callq 0xfffffffffde959fe
3d: 4c 89 f8 mov %r15,%rax
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 4c 8d 7d 08 lea 0x8(%rbp),%r15
6: be 08 00 00 00 mov $0x8,%esi
b: 4c 89 ff mov %r15,%rdi
e: e8 c1 59 e9 fd callq 0xfffffffffde959d4
13: 4c 89 f8 mov %r15,%rax
[ 161.095753][ T2255] RSP: 0018:ffffc90002c0f8b8 EFLAGS: 00010286
[ 161.101662][ T2255] RAX: fffffffffffffe00 RBX: fffffffffffffe00 RCX: ffffffff83bdf543
[ 161.109469][ T2255] RDX: ffffed10236632f0 RSI: 0000000000000008 RDI: ffff88811b319778
[ 161.117276][ T2255] RBP: ffff88811b319778 R08: 0000000000000001 R09: ffffed10236632ef
[ 161.125080][ T2255] R10: ffff88811b31977f R11: ffffffff85fe96a2 R12: 1ffff92000581f18
[ 161.132885][ T2255] R13: dffffc0000000000 R14: ffffc90002c0fa70 R15: 0000000000000000
[ 161.140691][ T2255] FS: 00007f623f19d740(0000) GS:ffff8887e9380000(0000) knlGS:0000000000000000
[ 161.149446][ T2255] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 161.155871][ T2255] CR2: 00007f623f05b000 CR3: 00000001b2026006 CR4: 00000000003706f0
[ 161.163705][ T2255] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 161.171512][ T2255] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 161.179316][ T2255] Call Trace:
[ 161.182456][ T2255] <TASK>
[ 161.185254][ T2255] ? __warn (kernel/panic.c:694)
[ 161.189181][ T2255] ? down_read (kernel/locking/rwsem.c:245 (discriminator 1) kernel/locking/rwsem.c:1249 (discriminator 1) kernel/locking/rwsem.c:1263 (discriminator 1) kernel/locking/rwsem.c:1528 (discriminator 1))
[ 161.193456][ T2255] ? report_bug (lib/bug.c:180 lib/bug.c:219)
[ 161.197814][ T2255] ? handle_bug (arch/x86/kernel/traps.c:239 (discriminator 1))
[ 161.202003][ T2255] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))
[ 161.206532][ T2255] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)
[ 161.211414][ T2255] ? down_read (arch/x86/include/asm/atomic64_64.h:79 (discriminator 5) include/linux/atomic/atomic-arch-fallback.h:2723 (discriminator 5) include/linux/atomic/atomic-long.h:163 (discriminator 5) include/linux/atomic/atomic-instrumented.h:3298 (discriminator 5) kernel/locking/rwsem.c:243 (discriminator 5) kernel/locking/rwsem.c:1249 (discriminator 5) kernel/locking/rwsem.c:1263 (discriminator 5) kernel/locking/rwsem.c:1528 (discriminator 5))
[ 161.215600][ T2255] ? down_read (kernel/locking/rwsem.c:245 (discriminator 1) kernel/locking/rwsem.c:1249 (discriminator 1) kernel/locking/rwsem.c:1263 (discriminator 1) kernel/locking/rwsem.c:1528 (discriminator 1))
[ 161.219854][ T2255] ? down_read (arch/x86/include/asm/atomic64_64.h:79 (discriminator 5) include/linux/atomic/atomic-arch-fallback.h:2723 (discriminator 5) include/linux/atomic/atomic-long.h:163 (discriminator 5) include/linux/atomic/atomic-instrumented.h:3298 (discriminator 5) kernel/locking/rwsem.c:243 (discriminator 5) kernel/locking/rwsem.c:1249 (discriminator 5) kernel/locking/rwsem.c:1263 (discriminator 5) kernel/locking/rwsem.c:1528 (discriminator 5))
[ 161.224034][ T2255] ? __rmqueue_pcplist (include/linux/list.h:215 (discriminator 1) include/linux/list.h:229 (discriminator 1) mm/page_alloc.c:2836 (discriminator 1))
[ 161.228904][ T2255] ? __pfx_down_read (kernel/locking/rwsem.c:1524)
[ 161.233566][ T2255] ? __pfx___might_resched (kernel/sched/core.c:10152)
[ 161.238707][ T2255] f2fs_dio_read_iter (fs/f2fs/f2fs.h:2468 (discriminator 1) fs/f2fs/file.c:4477 (discriminator 1)) f2fs
[ 161.244288][ T2255] f2fs_file_read_iter (fs/f2fs/file.c:4533) f2fs
[ 161.249949][ T2255] copy_splice_read (include/linux/fs.h:2102 fs/splice.c:365)
[ 161.254636][ T2255] ? __pfx_copy_splice_read (fs/splice.c:324)
[ 161.259843][ T2255] splice_direct_to_actor (fs/splice.c:1136)
[ 161.265045][ T2255] ? __pfx_direct_splice_actor (fs/splice.c:1159)
[ 161.270507][ T2255] ? __pfx_splice_direct_to_actor (fs/splice.c:1032)
[ 161.276229][ T2255] ? __pfx___might_resched (kernel/sched/core.c:10152)
[ 161.281359][ T2255] ? from_kgid_munged (kernel/user_namespace.c:527)
[ 161.286131][ T2255] do_splice_direct (fs/splice.c:1208 fs/splice.c:1233)
[ 161.290829][ T2255] ? __pfx_do_splice_direct (fs/splice.c:1232)
[ 161.296047][ T2255] ? __pfx_direct_file_splice_eof (fs/splice.c:1178)
[ 161.301779][ T2255] ? __pfx___might_resched (kernel/sched/core.c:10152)
[ 161.306894][ T2255] ? rw_verify_area (fs/read_write.c:377)
[ 161.311507][ T2255] vfs_copy_file_range (fs/read_write.c:1558)
[ 161.316552][ T2255] ? f2fs_getattr (arch/x86/include/asm/bitops.h:206 (discriminator 1) arch/x86/include/asm/bitops.h:238 (discriminator 1) include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 1) fs/f2fs/f2fs.h:3056 (discriminator 1) fs/f2fs/f2fs.h:3311 (discriminator 1) fs/f2fs/file.c:904 (discriminator 1)) f2fs
[ 161.321759][ T2255] ? __pfx_vfs_copy_file_range (fs/read_write.c:1486)
[ 161.327234][ T2255] ? __pfx___might_resched (kernel/sched/core.c:10152)
[ 161.332362][ T2255] __do_sys_copy_file_range (fs/read_write.c:1612)
[ 161.337755][ T2255] ? __pfx___do_sys_copy_file_range (fs/read_write.c:1578)
[ 161.343661][ T2255] ? f2fs_llseek (arch/x86/include/asm/bitops.h:206 (discriminator 1) arch/x86/include/asm/bitops.h:238 (discriminator 1) include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 1) fs/f2fs/f2fs.h:3056 (discriminator 1) fs/f2fs/f2fs.h:3210 (discriminator 1) fs/f2fs/file.c:518 (discriminator 1)) f2fs
[ 161.348813][ T2255] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 161.353151][ T2255] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 161.358886][ T2255] RIP: 0033:0x7f623f2a1719
[ 161.363137][ T2255] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 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 8b 0d b7 06 0d 00 f7 d8 64 89 01 48
All code
========
0: 08 89 e8 5b 5d c3 or %cl,-0x3ca2a418(%rcx)
6: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)
d: 00 00 00
10: 90 nop
11: 48 89 f8 mov %rdi,%rax
14: 48 89 f7 mov %rsi,%rdi
17: 48 89 d6 mov %rdx,%rsi
1a: 48 89 ca mov %rcx,%rdx
1d: 4d 89 c2 mov %r8,%r10
20: 4d 89 c8 mov %r9,%r8
23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9
28: 0f 05 syscall
2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction
30: 73 01 jae 0x33
32: c3 retq
33: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06f1
3a: f7 d8 neg %eax
3c: 64 89 01 mov %eax,%fs:(%rcx)
3f: 48 rex.W
Code starting with the faulting instruction
===========================================
0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax
6: 73 01 jae 0x9
8: c3 retq
9: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06c7
10: f7 d8 neg %eax
12: 64 89 01 mov %eax,%fs:(%rcx)
15: 48 rex.W
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240517/202405171532.760e22d3-oliver.sang@intel.com
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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