syzbot


WARNING in udf_free_inode (2)

Status: upstream: reported on 2025/08/31 12:36
Reported-by: syzbot+3fc6563fad3d5c2ae963@syzkaller.appspotmail.com
First crash: 3d10h, last: 3d10h
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in udf_free_inode -1 C 5 926d 1064d 0/1 upstream: reported C repro on 2022/10/05 19:55
linux-5.15 WARNING in udf_free_inode -1 1 423d 423d 0/3 auto-obsoleted due to no activity on 2024/10/14 23:57
linux-4.19 WARNING in udf_free_inode -1 C error 5 1040d 1064d 0/1 upstream: reported C repro on 2022/10/05 09:13
upstream WARNING in udf_free_inode udf -1 C error 19 929d 1063d 22/29 fixed on 2023/06/08 14:41

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5823 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
WARNING: CPU: 1 PID: 5823 at fs/udf/udfdecl.h:127 udf_free_inode+0x21c/0x2d0 fs/udf/ialloc.c:41
Modules linked in:
CPU: 1 PID: 5823 Comm: syz.2.313 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
RIP: 0010:udf_free_inode+0x21c/0x2d0 fs/udf/ialloc.c:41
Code: ff ff 4c 89 f7 31 f6 48 89 da 31 c9 41 b8 01 00 00 00 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 e9 91 ff ff e8 04 b8 b5 fe <0f> 0b e9 74 ff ff ff 89 d9 80 e1 07 fe c1 38 c1 0f 8c 72 fe ff ff
RSP: 0018:ffffc90003e9fb10 EFLAGS: 00010287
RAX: ffffffff82c212ac RBX: ffff88806072b498 RCX: 0000000000080000
RDX: ffffc90011130000 RSI: 000000000000b426 RDI: 000000000000b427
RBP: 000000009d4b3a86 R08: dffffc0000000000 R09: fffff520007d3f1d
R10: fffff520007d3f1d R11: 1ffff920007d3f1c R12: 1ffff1100489f0cf
R13: ffff88806affd01c R14: dffffc0000000000 R15: ffff8880244f8678
FS:  00007f2dda3256c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5767b87000 CR3: 0000000064ea3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 evict+0x485/0x870 fs/inode.c:647
 __dentry_kill+0x431/0x650 fs/dcache.c:586
 dentry_kill+0xb8/0x290 fs/dcache.c:-1
 dput+0xd8/0x1a0 fs/dcache.c:893
 do_renameat2+0x704/0xf70 fs/namei.c:4987
 __do_sys_rename fs/namei.c:5031 [inline]
 __se_sys_rename fs/namei.c:5029 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5029
 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: 0033:0x7f2ddc0ffbe9
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:00007f2dda325038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f2ddc337180 RCX: 00007f2ddc0ffbe9
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000200000000000
RBP: 00007f2ddc182e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ddc337218 R14: 00007f2ddc337180 R15: 00007ffcc6272538
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/08/31 12:35 linux-5.15.y 01879f56bdde 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in udf_free_inode
* Struck through repros no longer work on HEAD.