syzbot


kernel BUG in submit_bh_wbc

Status: upstream: reported C repro on 2023/06/04 13:30
Reported-by: syzbot+2a8a79e5f46dc7539f3e@syzkaller.appspotmail.com
First crash: 361d, last: 83d
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2024/05/04 upstream (ToT) 7367539ad4b0 C Didn't crash
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in submit_bh_wbc origin:lts-only C 19 24d 421d 0/3 upstream: reported C repro on 2023/04/04 23:04
upstream kernel BUG at fs/buffer.c:LINE! nilfs C done error 567 51d 2233d 26/26 fixed on 2024/04/10 03:59
upstream kernel BUG in submit_bh_wbc (2) udf C done 54 3d21h 35d 0/26 upstream: reported C repro on 2024/04/25 09:05
linux-4.14 kernel BUG at fs/buffer.c:LINE! C error 59 465d 1859d 0/1 upstream: reported C repro on 2019/04/27 19:47
linux-4.19 kernel BUG at fs/buffer.c:LINE! (2) udf ext4 C error 31 472d 1286d 0/1 upstream: reported C repro on 2020/11/21 07:48
android-54 kernel BUG at fs/buffer.c:LINE! ext4 C 566 15h05m 1591d 0/2 upstream: reported C repro on 2020/01/21 13:12
upstream kernel BUG in submit_bh_wbc nilfs C done 10 36d 45d 26/26 fixed on 2024/04/24 18:26
android-6-1 kernel BUG in submit_bh_wbc missing-backport origin:lts C done done 75 2d00h 350d 0/2 upstream: reported C repro on 2023/06/15 00:20
Fix bisection attempts (5)
Created Duration User Patch Repo Result
2024/01/20 20:40 0m bisect fix linux-5.15.y error job log (0)
2023/12/21 15:57 1h07m bisect fix linux-5.15.y job log (0) log
2023/11/03 21:14 1h40m bisect fix linux-5.15.y job log (0) log
2023/09/22 05:58 1h54m bisect fix linux-5.15.y job log (0) log
2023/07/09 21:19 1h41m bisect fix linux-5.15.y job log (0) log

Sample crash report:
NILFS (loop0): nilfs_get_block (ino=19): a race condition while inserting a data block at offset=0
------------[ cut here ]------------
kernel BUG at fs/buffer.c:3017!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 3563 Comm: syz-executor343 Not tainted 5.15.114-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:submit_bh_wbc+0x66d/0x690 fs/buffer.c:3017
Code: 8b 0c 24 80 e1 07 fe c1 38 c1 0f 8c a8 fc ff ff 48 8b 3c 24 e8 e4 43 e4 ff e9 9a fc ff ff e8 ea e8 9a ff 0f 0b e8 e3 e8 9a ff <0f> 0b e8 dc e8 9a ff 0f 0b e8 d5 e8 9a ff 0f 0b e8 ce e8 9a ff 0f
RSP: 0018:ffffc90002eff7b0 EFLAGS: 00010293
RAX: ffffffff81e5106d RBX: 0000000000000000 RCX: ffff88801e3e9dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81e50aa6 R09: ffffed100e08ad23
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888070456910 R15: 0000000000000000
FS:  00007fa1b8204700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1c0526000 CR3: 000000001b33b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ll_rw_block+0x1cf/0x230
 __block_write_begin_int+0xdb4/0x1650 fs/buffer.c:2042
 __block_write_begin fs/buffer.c:2062 [inline]
 block_write_begin+0x4f/0xc0 fs/buffer.c:2122
 nilfs_write_begin+0xa6/0x120 fs/nilfs2/inode.c:263
 generic_perform_write+0x2bf/0x5b0 mm/filemap.c:3776
 __generic_file_write_iter+0x381/0x4f0 mm/filemap.c:3871
 generic_file_write_iter+0xa7/0x1b0 mm/filemap.c:3935
 call_write_iter include/linux/fs.h:2103 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0xacf/0xe50 fs/read_write.c:594
 ksys_write+0x1a2/0x2c0 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fa1c05796e9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 71 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa1b82042f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa1c05ff7b0 RCX: 00007fa1c05796e9
RDX: 00000000000000a0 RSI: 0000000020000380 RDI: 0000000000000006
RBP: 00007fa1c05cbd1c R08: 00000000ffffff7f R09: 0000000000000000
R10: 000000000000001b R11: 0000000000000246 R12: 00007fa1c05cbb18
R13: 3f00000000000000 R14: 0400000000000000 R15: 00007fa1c05ff7b8
 </TASK>
Modules linked in:
---[ end trace f219f70bc2292857 ]---
RIP: 0010:submit_bh_wbc+0x66d/0x690 fs/buffer.c:3017
Code: 8b 0c 24 80 e1 07 fe c1 38 c1 0f 8c a8 fc ff ff 48 8b 3c 24 e8 e4 43 e4 ff e9 9a fc ff ff e8 ea e8 9a ff 0f 0b e8 e3 e8 9a ff <0f> 0b e8 dc e8 9a ff 0f 0b e8 d5 e8 9a ff 0f 0b e8 ce e8 9a ff 0f
RSP: 0018:ffffc90002eff7b0 EFLAGS: 00010293
RAX: ffffffff81e5106d RBX: 0000000000000000 RCX: ffff88801e3e9dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81e50aa6 R09: ffffed100e08ad23
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888070456910 R15: 0000000000000000
FS:  00007fa1b8204700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1c05badc0 CR3: 000000001b33b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (8):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/04 13:29 linux-5.15.y 0ab06468cbd1 a4ae4f42 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan kernel BUG in submit_bh_wbc
2024/03/08 14:58 linux-5.15.y 574362648507 cf82cde1 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2023/10/03 16:29 linux-5.15.y b911329317b4 65faba36 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2024/03/08 14:35 linux-5.15.y 574362648507 cf82cde1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2023/11/21 01:34 linux-5.15.y 2a910f4af54d cb976f63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2023/10/03 17:52 linux-5.15.y b911329317b4 65faba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2023/10/03 13:33 linux-5.15.y b911329317b4 65faba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
2023/10/03 07:36 linux-5.15.y b911329317b4 65faba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 kernel BUG in submit_bh_wbc
* Struck through repros no longer work on HEAD.