syzbot


WARNING in udf_free_inode

Status: upstream: reported on 2025/09/16 07:59
Reported-by: syzbot+2af01ee0217f5f385b68@syzkaller.appspotmail.com
First crash: 14h51m, last: 14h29m
Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 WARNING in udf_free_inode -1 C 5 939d 1077d 0/1 upstream: reported C repro on 2022/10/05 19:55
linux-5.15 WARNING in udf_free_inode -1 1 436d 436d 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 1053d 1077d 0/1 upstream: reported C repro on 2022/10/05 09:13
linux-5.15 WARNING in udf_free_inode (2) -1 1 16d 16d 0/3 upstream: reported on 2025/08/31 12:36
upstream WARNING in udf_free_inode udf -1 C error 19 942d 1076d 22/29 fixed on 2023/06/08 14:41

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5093 at fs/udf/udfdecl.h:127 udf_updated_lvid fs/udf/udfdecl.h:125 [inline]
WARNING: CPU: 1 PID: 5093 at fs/udf/udfdecl.h:127 udf_free_inode+0x21c/0x2d0 fs/udf/ialloc.c:41
Modules linked in:
CPU: 1 PID: 5093 Comm: syz.1.150 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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 89 ff ff e8 54 4d 9e 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:ffffc90003667c70 EFLAGS: 00010287
RAX: ffffffff82e2833c RBX: ffff8880557b8e28 RCX: 0000000000080000
RDX: ffffc90010a51000 RSI: 000000000000fd99 RDI: 000000000000fd9a
RBP: 00000000fdcdc6b7 R08: dffffc0000000000 R09: fffffbfff1c3eea6
R10: fffffbfff1c3eea6 R11: 1ffffffff1c3eea5 R12: 1ffff1100a0c08cf
R13: ffff88804df6801c R14: dffffc0000000000 R15: ffff888050604678
FS:  00007fed728ba6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fed728b9f98 CR3: 0000000055d08000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 evict+0x485/0x870 fs/inode.c:705
 do_unlinkat+0x377/0x560 fs/namei.c:4397
 __do_sys_unlink fs/namei.c:4438 [inline]
 __se_sys_unlink fs/namei.c:4436 [inline]
 __x64_sys_unlink+0x45/0x50 fs/namei.c:4436
 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: 0033:0x7fed7198eba9
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:00007fed728ba038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fed71bd6180 RCX: 00007fed7198eba9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000080
RBP: 00007fed71a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fed71bd6218 R14: 00007fed71bd6180 R15: 00007ffd51701d68
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/16 08:20 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in udf_free_inode
2025/09/16 07:58 linux-6.1.y 3db754f56897 e2beed91 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in udf_free_inode
* Struck through repros no longer work on HEAD.