syzbot


kernel BUG in mark_buffer_dirty_inode (2)

Status: premoderation: reported on 2025/05/07 18:20
Reported-by: syzbot+f56ead4ab087dbf5baca@syzkaller.appspotmail.com
First crash: 2d17h, last: 2d17h
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in mark_buffer_dirty_inode 1 120d 120d 0/3 auto-obsoleted due to no activity on 2025/04/20 01:10
android-54 kernel BUG at fs/buffer.c:LINE! ext4 C 3801 6m 1935d 0/2 upstream: reported C repro on 2020/01/21 13:12
android-6-1 kernel BUG in mark_buffer_dirty_inode syz inconclusive 3 145d 214d 0/2 auto-obsoleted due to no activity on 2025/03/16 04:31

Sample crash report:
loop0: detected capacity change from 0 to 128
------------[ cut here ]------------
kernel BUG at fs/buffer.c:622!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 2528 Comm: syz.0.950 Not tainted 6.1.134-syzkaller-00012-g646380b087a5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
RIP: 0010:mark_buffer_dirty_inode+0x308/0x310 fs/buffer.c:622
Code: 74 08 4c 89 f7 e8 f8 8b e8 ff 4d 89 2e 48 8b 7d a8 e8 9c e7 23 03 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a8 38 a4 ff <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 fb bf
RSP: 0018:ffffc90000c6f808 EFLAGS: 00010287
RAX: ffffffff81cbae28 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900011f9000 RSI: 000000000000217d RDI: 000000000000217e
RBP: ffffc90000c6f860 R08: dffffc0000000000 R09: fffff940008a9a99
R10: fffff940008a9a99 R11: 1ffffd40008a9a98 R12: dffffc0000000000
R13: ffff888114ecd200 R14: 1ffff110229d9a5d R15: ffff888114ecd2e8
FS:  00007f2d41c7a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa1797a5f98 CR3: 0000000131036000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 fat_remove_entries+0x1a6/0x420 fs/fat/dir.c:1050
 vfat_rename fs/fat/namei_vfat.c:992 [inline]
 vfat_rename2+0x153f/0x1c10 fs/fat/namei_vfat.c:1174
 vfs_rename+0xbc4/0x10d0 fs/namei.c:4873
 do_renameat2+0x7ed/0xf60 fs/namei.c:5026
 __do_sys_rename fs/namei.c:5072 [inline]
 __se_sys_rename fs/namei.c:5070 [inline]
 __x64_sys_rename+0x86/0x90 fs/namei.c:5070
 x64_sys_call+0x300/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:83
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2d40d8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2d41c7a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f2d40fb5fa0 RCX: 00007f2d40d8e969
RDX: 0000000000000000 RSI: 0000200000000a00 RDI: 0000200000000180
RBP: 00007f2d40e10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2d40fb5fa0 R15: 00007ffd0e6f5b18
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:mark_buffer_dirty_inode+0x308/0x310 fs/buffer.c:622
Code: 74 08 4c 89 f7 e8 f8 8b e8 ff 4d 89 2e 48 8b 7d a8 e8 9c e7 23 03 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 a8 38 a4 ff <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 fb bf
RSP: 0018:ffffc90000c6f808 EFLAGS: 00010287
RAX: ffffffff81cbae28 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc900011f9000 RSI: 000000000000217d RDI: 000000000000217e
RBP: ffffc90000c6f860 R08: dffffc0000000000 R09: fffff940008a9a99
R10: fffff940008a9a99 R11: 1ffffd40008a9a98 R12: dffffc0000000000
R13: ffff888114ecd200 R14: 1ffff110229d9a5d R15: ffff888114ecd2e8
FS:  00007f2d41c7a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2ee7b3 CR3: 0000000131036000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/07 18:19 android14-6.1 646380b087a5 dbf35fa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 kernel BUG in mark_buffer_dirty_inode
* Struck through repros no longer work on HEAD.