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BUG: unable to handle kernel paging request in udf_close_lvid

Status: upstream: reported C repro on 2023/04/01 11:57
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+26873a72980f8fa8bc55@syzkaller.appspotmail.com
First crash: 1034d, last: 18d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (1)
Date Name Commit Repro Result
2023/05/11 upstream (ToT) cc3c44c9fda2 C [report] BUG: unable to handle kernel paging request in udf_close_lvid
▶ ▼ Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Write in udf_close_lvid udf 24 C error 5 1085d 1500d 0/1 upstream: reported C repro on 2021/12/21 15:22
linux-5.15 KASAN: use-after-free Write in udf_close_lvid origin:upstream 24 C error 19 10d 982d 0/3 upstream: reported C repro on 2023/05/23 16:31
upstream KASAN: use-after-free Write in udf_close_lvid udf 24 C done 144 752d 1346d 25/29 fixed on 2024/02/21 18:23
upstream BUG: unable to handle kernel paging request in udf_close_lvid udf 8 1 453d 449d 0/29 auto-obsoleted due to no activity on 2025/01/31 11:46
linux-6.6 BUG: unable to handle kernel paging request in udf_close_lvid origin:upstream 19 C error 4 39d 39d 0/2 upstream: reported C repro on 2025/12/21 05:47
linux-4.14 KASAN: use-after-free Write in udf_close_lvid udf 24 C 4 1086d 1149d 0/1 upstream: reported C repro on 2022/12/07 21:30
▶ ▼ Fix bisection attempts (13)
Created Duration User Patch Repo Result
2025/05/16 12:49 5m bisect fix linux-6.1.y error job log
2025/04/14 22:02 1h18m bisect fix linux-6.1.y OK (0) job log log
2025/03/11 07:10 1h22m bisect fix linux-6.1.y OK (0) job log log
2025/02/08 04:00 1h26m bisect fix linux-6.1.y OK (0) job log log
2025/01/07 17:28 2h00m bisect fix linux-6.1.y OK (0) job log log
2024/11/18 18:55 1h29m bisect fix linux-6.1.y OK (0) job log log
2024/10/14 15:32 2h23m bisect fix linux-6.1.y OK (0) job log log
2024/08/12 15:59 1h39m bisect fix linux-6.1.y OK (0) job log log
2024/07/01 22:40 1h10m bisect fix linux-6.1.y OK (0) job log log
2024/05/23 15:43 1h10m bisect fix linux-6.1.y OK (0) job log log
2024/03/23 14:50 1h29m bisect fix linux-6.1.y OK (0) job log log
2024/02/22 03:46 1h18m bisect fix linux-6.1.y OK (0) job log log
2023/05/01 17:04 37m bisect fix linux-6.1.y OK (0) job log log

Sample crash report:
BUG: unable to handle page fault for address: ffffed101b1b9a3d
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23ffee067 P4D 23ffee067 PUD 13fff5067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 4364 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:udf_close_lvid+0x14e/0x990 fs/udf/super.c:2105
Code: 0f 84 f7 00 00 00 4c 89 6c 24 20 49 8d bd c0 00 00 00 48 89 7c 24 38 31 f6 e8 de b5 34 07 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 07 05 00 00 4c 89 74 24 40 41 c6 44 24
RSP: 0018:ffffc90003227be0 EFLAGS: 00010a02
RAX: 1ffff1101b1b9a3d RBX: ffff88805fdb704b RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abef900 RDI: ffff8880d8dcd1e8
RBP: ffffc90003227cd0 R08: dffffc0000000000 R09: fffffbfff1bfe1c6
R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff8880d8dcd1d0
R13: ffff888023b35000 R14: 1ffff92000644f88 R15: dffffc0000000000
FS:  000055557549c500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101b1b9a3d CR3: 0000000028b21000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 udf_put_super+0xc8/0x160 fs/udf/super.c:2392
 generic_shutdown_super+0x130/0x340 fs/super.c:501
 kill_block_super+0x7c/0xe0 fs/super.c:1470
 deactivate_locked_super+0x93/0xf0 fs/super.c:332
 cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f15f4190a77
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffd09a6ba98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f15f4213d7d RCX: 00007f15f4190a77
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd09a6bb50
RBP: 00007ffd09a6bb50 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd09a6cbe0
R13: 00007f15f4213d7d R14: 0000000000015d46 R15: 00007ffd09a6cc20
 </TASK>
Modules linked in:
CR2: ffffed101b1b9a3d
---[ end trace 0000000000000000 ]---
RIP: 0010:udf_close_lvid+0x14e/0x990 fs/udf/super.c:2105
Code: 0f 84 f7 00 00 00 4c 89 6c 24 20 49 8d bd c0 00 00 00 48 89 7c 24 38 31 f6 e8 de b5 34 07 49 8d 7c 24 18 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 07 05 00 00 4c 89 74 24 40 41 c6 44 24
RSP: 0018:ffffc90003227be0 EFLAGS: 00010a02
RAX: 1ffff1101b1b9a3d RBX: ffff88805fdb704b RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8abef900 RDI: ffff8880d8dcd1e8
RBP: ffffc90003227cd0 R08: dffffc0000000000 R09: fffffbfff1bfe1c6
R10: fffffbfff1bfe1c6 R11: 1ffffffff1bfe1c5 R12: ffff8880d8dcd1d0
R13: ffff888023b35000 R14: 1ffff92000644f88 R15: dffffc0000000000
FS:  000055557549c500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed101b1b9a3d CR3: 0000000028b21000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f 84 f7 00 00 00    	je     0xfd
   6:	4c 89 6c 24 20       	mov    %r13,0x20(%rsp)
   b:	49 8d bd c0 00 00 00 	lea    0xc0(%r13),%rdi
  12:	48 89 7c 24 38       	mov    %rdi,0x38(%rsp)
  17:	31 f6                	xor    %esi,%esi
  19:	e8 de b5 34 07       	call   0x734b5fc
  1e:	49 8d 7c 24 18       	lea    0x18(%r12),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 38       	movzbl (%rax,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 07 05 00 00    	jne    0x53e
  37:	4c 89 74 24 40       	mov    %r14,0x40(%rsp)
  3c:	41                   	rex.B
  3d:	c6                   	.byte 0xc6
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24

Crashes (44):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/11 14:29 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/09/22 07:01 linux-6.1.y a356197db198 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/04/01 11:56 linux-6.1.y 3b29299e5f60 f325deb0 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/08/13 13:41 linux-6.1.y 1321ab403b38 39990d51 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/06/25 02:30 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2024/04/19 03:50 linux-6.1.y 6741e066ec76 af24b050 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: slab-out-of-bounds Write in udf_close_lvid
2024/04/12 01:21 linux-6.1.y bf1e3b1cb1e0 95ed9ece .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/04/12 00:35 linux-6.1.y bf1e3b1cb1e0 95ed9ece .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2023/09/17 00:21 linux-6.1.y 09045dae0d90 0b6a67ac .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: slab-out-of-bounds Write in udf_close_lvid
2023/09/13 06:54 linux-6.1.y 59b13c2b647e 59da8366 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2025/09/21 16:12 linux-6.1.y 363a599da6d9 67c37560 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2 (clean fs)] ci2-linux-6-1-kasan-arm64 KASAN: use-after-free Write in udf_close_lvid
2023/06/26 13:50 linux-6.1.y e84a4e368abe 79782afc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2023/06/12 11:26 linux-6.1.y 2f3918bc53fb 49519f06 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2023/06/12 07:32 linux-6.1.y 2f3918bc53fb 49519f06 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2023/05/29 12:59 linux-6.1.y a343b0dd87b4 cf184559 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2025/09/18 19:00 linux-6.1.y 3db754f56897 e2beed91 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan KASAN: slab-out-of-bounds Write in udf_close_lvid
2024/01/04 00:50 linux-6.1.y a507f147e6f0 28c42cff .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/12/18 20:25 linux-6.1.y ba6f5fb46511 924661f4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/12/05 19:29 linux-6.1.y c6114c845984 858d62d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/10/03 02:41 linux-6.1.y d23900f974e0 65faba36 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2023/07/11 17:16 linux-6.1.y 61fd484b2cf6 2f19aa4f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan BUG: unable to handle kernel paging request in udf_close_lvid
2026/01/11 11:55 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/27 22:28 linux-6.1.y ee5e09825b81 6c853ff9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/26 20:02 linux-6.1.y ee5e09825b81 9aee4e0b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/23 16:49 linux-6.1.y ee5e09825b81 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/23 16:49 linux-6.1.y ee5e09825b81 d7d32352 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/23 04:16 linux-6.1.y ee5e09825b81 ce8a9099 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/22 07:14 linux-6.1.y ee5e09825b81 ca02180f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/21 14:40 linux-6.1.y ee5e09825b81 db5852f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/21 14:38 linux-6.1.y ee5e09825b81 db5852f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/21 14:38 linux-6.1.y ee5e09825b81 db5852f9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/19 20:23 linux-6.1.y ee5e09825b81 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/19 20:17 linux-6.1.y ee5e09825b81 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/19 20:17 linux-6.1.y ee5e09825b81 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/19 20:14 linux-6.1.y ee5e09825b81 9f0ab3fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/18 14:45 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/18 14:45 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/17 05:13 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/08/17 05:11 linux-6.1.y 117ac406ba90 dbc93b08 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/04/11 23:52 linux-6.1.y bf1e3b1cb1e0 95ed9ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2024/01/12 15:08 linux-6.1.y 7c58bfa711cb f6fa7c28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Write in udf_close_lvid
2023/11/09 19:15 linux-6.1.y fb2635ac69ab 56230772 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Read in udf_close_lvid
2023/10/30 07:57 linux-6.1.y 32c9cdbe383c 3c418d72 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: slab-out-of-bounds Read in udf_close_lvid
2023/09/13 12:26 linux-6.1.y 09045dae0d90 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan KASAN: use-after-free Read in udf_close_lvid
* Struck through repros no longer work on HEAD.