syzbot


kernel BUG in submit_bh_wbc (3)

Status: fixed on 2024/11/12 23:31
Subsystems: nilfs fs
[Documentation on labels]
Reported-by: syzbot+985ada84bf055a575c07@syzkaller.appspotmail.com
Fix commit: 6ed469df0bfb nilfs2: fix kernel bug due to missing clearing of buffer delay flag
First crash: 88d, last: 61d
Cause bisection: introduced by (bisect log) :
commit 602ce7b8e1343b19c0cf93a3dd1926838ac5a1cc
Author: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Date: Fri Jan 27 13:22:02 2023 +0000

  nilfs2: prevent WARNING in nilfs_dat_commit_end()

Crash: WARNING in mark_buffer_dirty (log)
Repro: C syz .config
  
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] [fs?] kernel BUG in submit_bh_wbc (3) 2 (5) 2024/10/21 10:57
[PATCH] nilfs2: fix kernel bug due to missing clearing of buffer delay flag 2 (2) 2024/10/16 13:05
Similar bugs (10)
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 done 19 198d 626d 3/3 fixed on 2024/07/20 06:27
upstream kernel BUG at fs/buffer.c:LINE! nilfs C done error 567 256d 2437d 25/28 fixed on 2024/04/10 03:59
upstream kernel BUG in submit_bh_wbc (2) udf C done 123 134d 240d 27/28 fixed on 2024/08/14 03:44
linux-4.14 kernel BUG at fs/buffer.c:LINE! C error 59 670d 2064d 0/1 upstream: reported C repro on 2019/04/27 19:47
linux-6.1 kernel BUG in submit_bh_wbc (2) origin:lts-only C 93 4d17h 147d 0/3 upstream: reported C repro on 2024/07/26 16:49
linux-4.19 kernel BUG at fs/buffer.c:LINE! (2) udf ext4 C error 31 677d 1491d 0/1 upstream: reported C repro on 2020/11/21 07:48
android-54 kernel BUG at fs/buffer.c:LINE! ext4 C 1187 58d 1795d 0/2 upstream: reported C repro on 2020/01/21 13:12
linux-5.15 kernel BUG in submit_bh_wbc C error 8 287d 565d 0/3 auto-obsoleted due to no activity on 2024/06/16 14:58
upstream kernel BUG in submit_bh_wbc nilfs C done 10 241d 250d 25/28 fixed on 2024/04/24 18:26
android-6-1 kernel BUG in submit_bh_wbc missing-backport origin:lts C done done 1163 3h41m 555d 0/2 upstream: reported C repro on 2023/06/15 00:20

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2785!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 5235 Comm: syz-executor372 Not tainted 6.12.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:submit_bh_wbc+0x556/0x560 fs/buffer.c:2785
Code: 89 fa e8 dd 76 cc 02 e9 95 fe ff ff e8 73 85 74 ff 90 0f 0b e8 6b 85 74 ff 90 0f 0b e8 63 85 74 ff 90 0f 0b e8 5b 85 74 ff 90 <0f> 0b e8 53 85 74 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003b6f0d8 EFLAGS: 00010293
RAX: ffffffff82206235 RBX: 0000000000000154 RCX: ffff88802d490000
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000100 R08: ffffffff82205df9 R09: 1ffff1100ef571d0
R10: dffffc0000000000 R11: ffffed100ef571d1 R12: 0000000000000000
R13: ffff888077ab8e80 R14: 0000000000000000 R15: 1ffff1100ef571d0
FS:  0000555573f7e380(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbda422e00a CR3: 000000002fc1e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 submit_bh fs/buffer.c:2824 [inline]
 block_read_full_folio+0x93b/0xcd0 fs/buffer.c:2451
 do_mpage_readpage+0x1a73/0x1c80 fs/mpage.c:317
 mpage_read_folio+0x108/0x1e0 fs/mpage.c:392
 filemap_read_folio+0x14b/0x630 mm/filemap.c:2367
 do_read_cache_folio+0x3f5/0x850 mm/filemap.c:3825
 read_mapping_folio include/linux/pagemap.h:1011 [inline]
 nilfs_get_folio+0x4b/0x240 fs/nilfs2/dir.c:190
 nilfs_find_entry+0x13d/0x660 fs/nilfs2/dir.c:313
 nilfs_inode_by_name+0xad/0x240 fs/nilfs2/dir.c:394
 nilfs_lookup+0xed/0x210 fs/nilfs2/namei.c:63
 lookup_open fs/namei.c:3573 [inline]
 open_last_lookups fs/namei.c:3694 [inline]
 path_openat+0x11a7/0x3590 fs/namei.c:3930
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_sys_openat fs/open.c:1446 [inline]
 __se_sys_openat fs/open.c:1441 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1441
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbda41e54a9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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:00007ffe5e610168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fbda41e54a9
RDX: 000000000000275a RSI: 0000000020000180 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 00000000000051a5 R09: 000000002000a440
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe5e61019c
R13: 0000000000000007 R14: 431bde82d7b634db R15: 00007ffe5e6101d0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x556/0x560 fs/buffer.c:2785
Code: 89 fa e8 dd 76 cc 02 e9 95 fe ff ff e8 73 85 74 ff 90 0f 0b e8 6b 85 74 ff 90 0f 0b e8 63 85 74 ff 90 0f 0b e8 5b 85 74 ff 90 <0f> 0b e8 53 85 74 ff 90 0f 0b 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003b6f0d8 EFLAGS: 00010293
RAX: ffffffff82206235 RBX: 0000000000000154 RCX: ffff88802d490000
RDX: 0000000000000000 RSI: 0000000000000100 RDI: 0000000000000000
RBP: 0000000000000100 R08: ffffffff82205df9 R09: 1ffff1100ef571d0
R10: dffffc0000000000 R11: ffffed100ef571d1 R12: 0000000000000000
R13: ffff888077ab8e80 R14: 0000000000000000 R15: 1ffff1100ef571d0
FS:  0000555573f7e380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd9cbff000 CR3: 000000002fc1e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/10/21 09:47 upstream 42f7652d3eb5 cd6fc0a3 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/16 08:13 upstream 2f87d0916ce0 bde2d81c .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in submit_bh_wbc
2024/10/21 08:41 upstream 42f7652d3eb5 cd6fc0a3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/17 03:23 upstream c964ced77262 666f77ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/16 00:23 upstream 2f87d0916ce0 bde2d81c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/15 10:04 upstream eca631b8fe80 7eb57b4a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/15 04:16 upstream eca631b8fe80 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/14 21:38 upstream eca631b8fe80 b01b6661 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/14 06:18 upstream 6485cf5ea253 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/14 06:09 upstream 6485cf5ea253 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/14 06:02 upstream 6485cf5ea253 084d8178 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/08 02:48 upstream 87d6aab2389e d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/07 04:33 upstream 8cf0b93919e1 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/06 06:01 upstream fc20a3e57247 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/05 10:12 upstream 27cc6fdf7201 d7906eff .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/10/02 16:49 upstream e32cde8d2bd7 02f9582a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/09/26 14:58 upstream 11a299a7933e 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
2024/09/24 10:21 upstream abf2050f51fd 89298aad .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in submit_bh_wbc
* Struck through repros no longer work on HEAD.