syzbot


kernel BUG in reiserfs_rename

Status: upstream: reported C repro on 2024/01/22 10:19
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+11df545e92267a446a5e@syzkaller.appspotmail.com
First crash: 701d, last: 8d19h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2025/12/15 upstream (ToT) 8f0b4cce4481 C Failed due to an error; will retry later
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 kernel BUG in reiserfs_rename missing-backport origin:lts-only -1 C done 2 21d 815d 0/3 upstream: reported C repro on 2023/09/29 12:23
upstream kernel BUG in reiserfs_rename fs -1 C unreliable done 6 703d 878d 0/29 auto-obsoleted due to no activity on 2024/04/28 17:48
Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/10/10 15:10 44m retest repro linux-5.15.y report log
2025/07/26 16:10 16m retest repro linux-5.15.y report log
2025/05/16 23:05 1h17m retest repro linux-5.15.y report log
2025/03/07 03:57 21m retest repro linux-5.15.y report log
2024/12/26 22:57 18m retest repro linux-5.15.y report log
2024/10/15 00:28 0m retest repro linux-5.15.y error
Fix bisection attempts (4)
Created Duration User Patch Repo Result
2025/10/19 09:02 1m fix candidate upstream error job log
2025/07/09 09:41 1m fix candidate upstream error job log
2025/01/14 22:00 1m fix candidate upstream error job log
2024/03/01 13:49 33m bisect fix linux-5.15.y error job log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4543 Comm: syz.0.46 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__reiserfs_panic+0x13a/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 20 4e 1b 8a 48 0f 44 c8 4c 0f 44 f0 48 c7 c7 e0 4e 1b 8a 4c 89 fe 4c 89 f2 49 89 d8 49 c7 c1 20 5e 1d 96 e8 96 51 ff ff <0f> 0b 0f 1f 40 00 53 48 89 fb e8 97 ae df f7 48 c7 c7 a0 57 1b 8a
RSP: 0018:ffffc9000373f4e0 EFLAGS: 00010246
RAX: 000000000000005a RBX: ffffffff8ba09e95 RCX: 74924be44f55a800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000373f5d0 R08: dffffc0000000000 R09: ffffed10172267b0
R10: ffffed10172267b0 R11: 1ffff110172267af R12: ffffffff8a1afb60
R13: ffffc9000373f500 R14: ffffffff8a1afb40 R15: ffff8880777f86a8
FS:  00007f32931566c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd494b6c28 CR3: 000000001efde000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 reiserfs_rename+0x1c0e/0x1eb0 fs/reiserfs/namei.c:1427
 vfs_rename+0xbbf/0x10d0 fs/namei.c:4840
 do_renameat2+0xa83/0xf70 fs/namei.c:4993
 __do_sys_rename fs/namei.c:5039 [inline]
 __se_sys_rename fs/namei.c:5037 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5037
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f3293b08749
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:00007f3293156038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f3293d5f090 RCX: 00007f3293b08749
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 00002000000001c0
RBP: 00007f3293b8cf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3293d5f128 R14: 00007f3293d5f090 R15: 00007ffefc29b958
 </TASK>
Modules linked in:
---[ end trace 57f5b0f2e4018a32 ]---
RIP: 0010:__reiserfs_panic+0x13a/0x140 fs/reiserfs/prints.c:390
Code: c7 c1 20 4e 1b 8a 48 0f 44 c8 4c 0f 44 f0 48 c7 c7 e0 4e 1b 8a 4c 89 fe 4c 89 f2 49 89 d8 49 c7 c1 20 5e 1d 96 e8 96 51 ff ff <0f> 0b 0f 1f 40 00 53 48 89 fb e8 97 ae df f7 48 c7 c7 a0 57 1b 8a
RSP: 0018:ffffc9000373f4e0 EFLAGS: 00010246
RAX: 000000000000005a RBX: ffffffff8ba09e95 RCX: 74924be44f55a800
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000373f5d0 R08: dffffc0000000000 R09: ffffed10172267b0
R10: ffffed10172267b0 R11: 1ffff110172267af R12: ffffffff8a1afb60
R13: ffffc9000373f500 R14: ffffffff8a1afb40 R15: ffff8880777f86a8
FS:  00007f32931566c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f34b1eb1000 CR3: 000000001efde000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/12/14 16:22 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan kernel BUG in reiserfs_rename
2024/01/22 10:19 linux-5.15.y ddcaf4999061 9bd8dcda .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 kernel BUG in reiserfs_rename
* Struck through repros no longer work on HEAD.