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general protection fault in filename_create

Status: upstream: reported C repro on 2023/04/29 15:06
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+109482120fd91264a45b@syzkaller.appspotmail.com
First crash: 1007d, last: 1d15h
Cause bisection: failed (error log, bisect log)
  
Fix bisection: fixed by (bisect log) [merge commit]:
commit 23818c192b1564bae833256324cbc7c451dc7087
Author: Greg Kroah-Hartman <gregkh@google.com>
Date: Fri May 26 15:15:14 2023 +0000

  Merge tag 'android13-5.15.104_r00' into android13-5.15

  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2023/09/27 android13-5.15-lts (ToT) ea586874d2f9 C [report] general protection fault in filename_create
2023/09/27 lts (merge base) aff03380bda4 C Didn't crash
2023/09/27 upstream (ToT) 0e945134b680 C Didn't crash
▶ ▼ Similar bugs (5)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 general protection fault in filename_create origin:downstream 2 C done 34 1d11h 909d 0/2 upstream: reported C repro on 2023/08/05 10:34
android-6-12 general protection fault in filename_create (2) origin:downstream 2 C 10 5d15h 125d 0/1 premoderation: reported C repro on 2025/09/27 02:54
android-5-10 general protection fault in filename_create 2 C 112 5d14h 881d 0/2 upstream: reported C repro on 2023/09/02 15:10
android-6-12 general protection fault in filename_create 2 1 216d 216d 0/1 auto-obsoleted due to no activity on 2025/09/26 14:56
upstream BUG: corrupted list in filename_create fs 8 1 79d 75d 0/29 moderation: reported on 2025/11/16 19:13
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/01/07 11:26 8m retest repro android13-5.15-lts report log
2026/01/07 11:26 8m retest repro android13-5.15-lts report log
2026/01/07 11:26 6m retest repro android13-5.15-lts report log
2026/01/07 11:26 14m retest repro android13-5.15-lts report log
2026/01/07 11:26 7m retest repro android13-5.15-lts report log
2025/12/03 22:54 6m retest repro android13-5.15-lts report log
2025/12/03 22:54 7m retest repro android13-5.15-lts report log
2025/11/17 15:15 7m retest repro android13-5.15-lts report log
2025/11/17 15:15 17m retest repro android13-5.15-lts report log
2025/11/17 15:15 17m retest repro android13-5.15-lts report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/09/25 02:11 2h56m bisect fix android13-5.15-lts OK (1) job log
2023/06/05 04:43 20m bisect fix android13-5.15-lts OK (0) job log log

Sample crash report:
general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 1 PID: 375 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:465 [inline]
RIP: 0010:filename_create+0x2af/0x470 fs/namei.c:3850
Code: 89 de e8 a4 29 b6 ff 85 db 0f 84 8d 00 00 00 e8 e7 25 b6 ff 48 8b 5c 24 20 4c 8b 74 24 18 e9 a4 00 00 00 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 8e 01 00 00 44 8b 20 44 89 e6 81 e6 00
RSP: 0018:ffffc90000c47d60 EFLAGS: 00010203
RAX: 0000000000000016 RBX: 1ffff92000188fd3 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888110292780
RBP: ffffc90000c47e30 R08: ffff88810d15e38f R09: 1ffff11021a2bc71
R10: dffffc0000000000 R11: ffffed1021a2bc72 R12: dffffc0000000000
R13: ffffc90000c47e98 R14: 0000000000000600 R15: 0000000000000016
FS:  00007fe7d27ef6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000afe0 CR3: 0000000120f13000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_mknodat+0xd7/0x7a0 fs/namei.c:3989
 __do_sys_mknod fs/namei.c:4035 [inline]
 __se_sys_mknod fs/namei.c:4033 [inline]
 __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4033
 x64_sys_call+0x886/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:134
 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: 0033:0x7fe7d298acb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7d27ef028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007fe7d2c05fa0 RCX: 00007fe7d298acb9
RDX: 0000000000000704 RSI: 00000000ffff8000 RDI: 00002000000002c0
RBP: 00007fe7d29f8bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7d2c06038 R14: 00007fe7d2c05fa0 R15: 00007ffda5f14a68
 </TASK>
Modules linked in:
---[ end trace d5a03fc02fb1c859 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:404 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:409 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:455 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:465 [inline]
RIP: 0010:filename_create+0x2af/0x470 fs/namei.c:3850
Code: 89 de e8 a4 29 b6 ff 85 db 0f 84 8d 00 00 00 e8 e7 25 b6 ff 48 8b 5c 24 20 4c 8b 74 24 18 e9 a4 00 00 00 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 8e 01 00 00 44 8b 20 44 89 e6 81 e6 00
RSP: 0018:ffffc90000c47d60 EFLAGS: 00010203
RAX: 0000000000000016 RBX: 1ffff92000188fd3 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888110292780
RBP: ffffc90000c47e30 R08: ffff88810d15e38f R09: 1ffff11021a2bc71
R10: dffffc0000000000 R11: ffffed1021a2bc72 R12: dffffc0000000000
R13: ffffc90000c47e98 R14: 0000000000000600 R15: 0000000000000016
FS:  00007fe7d27ef6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000afe0 CR3: 0000000120f13000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 de                	mov    %ebx,%esi
   2:	e8 a4 29 b6 ff       	call   0xffb629ab
   7:	85 db                	test   %ebx,%ebx
   9:	0f 84 8d 00 00 00    	je     0x9c
   f:	e8 e7 25 b6 ff       	call   0xffb625fb
  14:	48 8b 5c 24 20       	mov    0x20(%rsp),%rbx
  19:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
  1e:	e9 a4 00 00 00       	jmp    0xc7
  23:	48 89 c1             	mov    %rax,%rcx
  26:	48 c1 e9 03          	shr    $0x3,%rcx
* 2a:	42 0f b6 0c 21       	movzbl (%rcx,%r12,1),%ecx <-- trapping instruction
  2f:	84 c9                	test   %cl,%cl
  31:	0f 85 8e 01 00 00    	jne    0x1c5
  37:	44 8b 20             	mov    (%rax),%r12d
  3a:	44 89 e6             	mov    %r12d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0

Crashes (40):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/01/19 13:05 android13-5.15-lts 050dc55b0457 a9fc5226 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2026/01/19 08:15 android13-5.15-lts 050dc55b0457 20d37d28 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/10/29 06:02 android13-5.15-lts 1edb21e89ce4 fd2207e7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/10/08 19:50 android13-5.15-lts bce84c40a40b 7e2882b3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/09/27 07:47 android13-5.15-lts 8d934e0056f7 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/07/24 22:48 android13-5.15-lts a71626bd56a5 65d60d73 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/03/30 18:14 android13-5.15-lts 5e1b899f19c3 d3999433 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/11/21 04:20 android13-5.15-lts 2e66050fb753 4b25d554 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-android-5-15 general protection fault in filename_create
2024/07/18 10:08 android13-5.15-lts db06c48ab67e 0f902625 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 09:40 android13-5.15-lts db06c48ab67e 0f902625 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 09:11 android13-5.15-lts db06c48ab67e 0f902625 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 08:41 android13-5.15-lts db06c48ab67e 0f902625 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/02/23 23:41 android13-5.15-lts 993bed180178 8d446f15 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/09/27 08:31 android13-5.15-lts ea586874d2f9 0b6a67ac .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/04/29 15:01 android13-5.15-lts 6d40cb68a657 62df2017 .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2026/01/29 06:35 android13-5.15-lts 7e1070528954 0adc945e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2026/01/20 23:48 android13-5.15-lts 630deefd7859 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2026/01/20 12:15 android13-5.15-lts 630deefd7859 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2026/01/20 12:14 android13-5.15-lts 630deefd7859 06648d9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/12/22 02:35 android13-5.15-lts 050dc55b0457 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/11/02 18:24 android13-5.15-lts 1edb21e89ce4 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/10/14 20:23 android13-5.15-lts bce84c40a40b b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/09/06 14:04 android13-5.15-lts da3dbfdd15be d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/03/30 17:24 android13-5.15-lts 5e1b899f19c3 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/01/19 16:08 android13-5.15-lts 829d9f138569 f2cb035c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2025/01/01 02:34 android13-5.15-lts f7ce2ffd2f33 d3ccff63 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/12/04 00:30 android13-5.15-lts fa1d8b6c5d4d b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/12/04 00:30 android13-5.15-lts fa1d8b6c5d4d b50eb251 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/09/06 13:15 android13-5.15-lts 53be7c8abe11 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/09/06 09:50 android13-5.15-lts 53be7c8abe11 464ac2ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/08/04 06:55 android13-5.15-lts 70e1a731d986 1786a2a8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 08:22 android13-5.15-lts db06c48ab67e 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 08:22 android13-5.15-lts db06c48ab67e 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 08:13 android13-5.15-lts db06c48ab67e 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/07/18 08:13 android13-5.15-lts db06c48ab67e 0f902625 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2024/05/02 19:51 android13-5.15-lts 5d96939590c0 3ba885bc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/09/27 08:08 android13-5.15-lts ea586874d2f9 0b6a67ac .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/08/05 09:25 android13-5.15-lts 748fd0d9ca0f cdae481e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/06/23 13:46 android13-5.15-lts 565c3abfa129 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
2023/04/29 14:45 android13-5.15-lts 6d40cb68a657 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-15 general protection fault in filename_create
* Struck through repros no longer work on HEAD.