Hello,
kernel test robot noticed "kernel_BUG_at_fs/buffer.c" on:
commit: 5e90db780eee7cd4635d0b784603424f66d101e1 ("[PATCH] filemap: Convert generic_perform_write() to support large folios")
url: https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/filemap-Convert-generic_perform_write-to-support-large-folios/20240112-032734
base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/all/20240111192513.3505769-1-willy@xxxxxxxxxxxxx/
patch subject: [PATCH] filemap: Convert generic_perform_write() to support large folios
in testcase: xfstests
version: xfstests-x86_64-17324dbc-1_20240115
with following parameters:
bp1_memmap: 4G!8G
bp2_memmap: 4G!10G
bp3_memmap: 4G!16G
bp4_memmap: 4G!22G
nr_pmem: 4
fs: ext2
test: generic-dax
compiler: gcc-12
test machine: 16 threads 1 sockets Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz (Broadwell-DE) with 48G 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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-lkp/202401191032.c8606703-oliver.sang@xxxxxxxxx
[ 264.977376][ T4263] ------------[ cut here ]------------
[ 264.984538][ T4263] kernel BUG at fs/buffer.c:2081!
[ 264.991338][ T4263] invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
[ 264.999394][ T4263] CPU: 1 PID: 4263 Comm: cp Tainted: G S 6.7.0-01803-g5e90db780eee #1
[ 265.010554][ T4263] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016
[ 265.021275][ T4263] RIP: 0010:__block_write_begin_int (fs/buffer.c:2081 (discriminator 1))
[ 265.029168][ T4263] Code: 65 48 2b 14 25 28 00 00 00 0f 85 3c 01 00 00 48 81 c4 c0 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b e9 4d fb ff ff 0f 0b <0f> 0b 0f 0b 48 8b 54 24 08 48 8b 74 24 10 48 89 ef 89 04 24 e8 fd
All code
========
0: 65 48 2b 14 25 28 00 sub %gs:0x28,%rdx
7: 00 00
9: 0f 85 3c 01 00 00 jne 0x14b
f: 48 81 c4 c0 00 00 00 add $0xc0,%rsp
16: 5b pop %rbx
17: 5d pop %rbp
18: 41 5c pop %r12
1a: 41 5d pop %r13
1c: 41 5e pop %r14
1e: 41 5f pop %r15
20: c3 retq
21: 0f 0b ud2
23: e9 4d fb ff ff jmpq 0xfffffffffffffb75
28: 0f 0b ud2
2a:* 0f 0b ud2 <-- trapping instruction
2c: 0f 0b ud2
2e: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
33: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
38: 48 89 ef mov %rbp,%rdi
3b: 89 04 24 mov %eax,(%rsp)
3e: e8 .byte 0xe8
3f: fd std
Code starting with the faulting instruction
===========================================
0: 0f 0b ud2
2: 0f 0b ud2
4: 48 8b 54 24 08 mov 0x8(%rsp),%rdx
9: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
e: 48 89 ef mov %rbp,%rdi
11: 89 04 24 mov %eax,(%rsp)
14: e8 .byte 0xe8
15: fd std
[ 265.052266][ T4263] RSP: 0018:ffffc9000c9dfaa0 EFLAGS: 00010287
[ 265.059752][ T4263] RAX: 0000000000020000 RBX: 0000000000000000 RCX: ffffffff81b86bf2
[ 265.069035][ T4263] RDX: 1ffffd4000bbc0b0 RSI: 0000000000000008 RDI: ffffea0005de0580
[ 265.078345][ T4263] RBP: ffffea0005de0580 R08: 0000000000000000 R09: fffff94000bbc0b0
[ 265.087668][ T4263] R10: ffffea0005de0587 R11: 0000000000000001 R12: 0000000000000000
[ 265.096944][ T4263] R13: 0000000000001000 R14: ffffea0005de0588 R15: ffffffffc149b940
[ 265.106163][ T4263] FS: 00007f4d3456c800(0000) GS:ffff888ba9c80000(0000) knlGS:0000000000000000
[ 265.116366][ T4263] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 265.124278][ T4263] CR2: 00007f4d3456a000 CR3: 0000000138c2c002 CR4: 00000000003706f0
[ 265.133569][ T4263] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 265.142841][ T4263] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 265.152019][ T4263] Call Trace:
[ 265.156536][ T4263] <TASK>
[ 265.160748][ T4263] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 265.165703][ T4263] ? do_trap (arch/x86/kernel/traps.c:112 arch/x86/kernel/traps.c:153)
[ 265.171181][ T4263] ? __block_write_begin_int (fs/buffer.c:2081 (discriminator 1))
[ 265.178019][ T4263] ? do_error_trap (arch/x86/include/asm/traps.h:59 arch/x86/kernel/traps.c:174)
[ 265.183817][ T4263] ? __block_write_begin_int (fs/buffer.c:2081 (discriminator 1))
[ 265.190674][ T4263] ? handle_invalid_op (arch/x86/kernel/traps.c:212)
[ 265.196850][ T4263] ? __block_write_begin_int (fs/buffer.c:2081 (discriminator 1))
[ 265.203673][ T4263] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 265.209523][ T4263] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:568)
[ 265.215747][ T4263] ? ext2_iomap_begin (fs/ext2/inode.c:785) ext2
[ 265.222523][ T4263] ? __block_write_begin_int (arch/x86/include/asm/bitops.h:206 arch/x86/include/asm/bitops.h:238 include/asm-generic/bitops/instrumented-non-atomic.h:142 include/linux/page-flags.h:785 include/linux/page-flags.h:806 include/linux/mm.h:1090 include/linux/mm.h:2141 fs/buffer.c:2081)
[ 265.229300][ T4263] ? __block_write_begin_int (fs/buffer.c:2081 (discriminator 1))
[ 265.236035][ T4263] ? mode_strip_sgid (fs/inode.c:1889)
[ 265.242047][ T4263] ? ext2_iomap_begin (fs/ext2/inode.c:785) ext2
[ 265.248757][ T4263] ? invalidate_bh_lrus_cpu (fs/buffer.c:2070)
[ 265.255144][ T4263] ? ext2_iomap_begin (fs/ext2/inode.c:785) ext2
[ 265.261773][ T4263] block_write_begin (fs/buffer.c:2152 fs/buffer.c:2211)
[ 265.267589][ T4263] ext2_write_begin (fs/ext2/inode.c:924) ext2
[ 265.273935][ T4263] generic_perform_write (mm/filemap.c:3930)
[ 265.280191][ T4263] ? preempt_notifier_dec (kernel/sched/core.c:10130)
[ 265.286318][ T4263] ? do_sync_mmap_readahead (mm/filemap.c:3891)
[ 265.292783][ T4263] ? file_update_time (fs/inode.c:2170)
[ 265.298599][ T4263] generic_file_write_iter (include/linux/fs.h:807 mm/filemap.c:4059)
[ 265.304874][ T4263] vfs_write (include/linux/fs.h:2085 fs/read_write.c:497 fs/read_write.c:590)
[ 265.310003][ T4263] ? kernel_write (fs/read_write.c:571)
[ 265.315543][ T4263] ksys_write (fs/read_write.c:643)
[ 265.320595][ T4263] ? __ia32_sys_read (fs/read_write.c:633)
[ 265.326141][ T4263] ? do_user_addr_fault (include/linux/mm.h:689 arch/x86/mm/fault.c:1366)
[ 265.332146][ T4263] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 265.337434][ T4263] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 265.344113][ T4263] RIP: 0033:0x7f4d3471c473
[ 265.349297][ T4263] Code: 8b 15 21 2a 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
All code
========
0: 8b 15 21 2a 0e 00 mov 0xe2a21(%rip),%edx # 0xe2a27
6: f7 d8 neg %eax
8: 64 89 02 mov %eax,%fs:(%rdx)
b: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax
12: eb b7 jmp 0xffffffffffffffcb
14: 0f 1f 00 nopl (%rax)
17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax
1e: 00
1f: 85 c0 test %eax,%eax
21: 75 14 jne 0x37
23: b8 01 00 00 00 mov $0x1,%eax
28: 0f 05 syscall
2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction
30: 77 55 ja 0x87
32: c3 retq
33: 0f 1f 40 00 nopl 0x0(%rax)
37: 48 83 ec 28 sub $0x28,%rsp
3b: 48 89 54 24 18 mov %rdx,0x18(%rsp)
Code starting with the faulting instruction
===========================================
0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax
6: 77 55 ja 0x5d
8: c3 retq
9: 0f 1f 40 00 nopl 0x0(%rax)
d: 48 83 ec 28 sub $0x28,%rsp
11: 48 89 54 24 18 mov %rdx,0x18(%rsp)
The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20240119/202401191032.c8606703-oliver.sang@xxxxxxxxx
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
