general protection fault in filename_create (2)

Status: premoderation: reported C repro on 2025/09/27 02:54
Bug presence: origin:downstream
[Documentation on labels]
Reported-by: syzbot+4cf75fc77f73d9c04b42@syzkaller.appspotmail.com
First crash: 347d, last: 14d
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/09/27 android16-6.12 (ToT) e34340c0d860 C [report] general protection fault in filename_create
2025/09/27 lts (merge base) b0c51e95f54e C Didn't crash
2025/09/27 upstream (ToT) fec734e8d564 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 syz, C done error 49 56d 1131d 0/2 upstream: reported C repro on 2023/08/05 10:34
android-5-15 general protection fault in filename_create origin:downstream 2 syz, C error unreliable 51 8d16h 1229d 0/2 upstream: reported C repro on 2023/04/29 15:06
android-5-10 general protection fault in filename_create 2 syz, C 137 12d 1103d 0/2 upstream: reported C repro on 2023/09/02 15:10
android-6-12 general protection fault in filename_create 2 1 438d 438d 0/1 auto-obsoleted due to no activity on 2025/09/26 14:56
upstream BUG: corrupted list in filename_create fs 8 1 301d 297d 0/29 auto-obsoleted due to no activity on 2026/02/10 19:02
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/08/15 07:59 13m retest repro android16-6.12 report job log log
2026/08/15 07:59 9m retest repro android16-6.12 report job log log
2026/08/15 07:59 9m retest repro android16-6.12 report job log log
2026/08/15 07:59 14m retest repro android16-6.12 report job log log
2026/08/15 07:59 14m retest repro android16-6.12 report job log log
2026/06/06 01:34 15m retest repro android16-6.12 log
2026/06/06 01:34 15m retest repro android16-6.12 log
2026/05/24 03:18 18m retest repro android16-6.12 log
2026/05/24 03:18 15m retest repro android16-6.12 log
2026/05/24 03:18 15m retest repro android16-6.12 log

Sample crash report:
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
CPU: 0 UID: 0 PID: 316 Comm: syz-executor929 Not tainted syzkaller #0 b8659436e0263bf3bdd99d8db567fd2a3f6145e5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:475 [inline]
RIP: 0010:filename_create+0x25a/0x450 fs/namei.c:4041
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 6f 5f ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 0f ae 98 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 c1 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc9000133fd20 EFLAGS: 00010203
RAX: 0000000000000015 RBX: ffffc9000133fe88 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888110cd37f0
RBP: ffffc9000133fdf0 R08: ffff8881f6e50c47 R09: 1ffff1103edca188
R10: dffffc0000000000 R11: ffffed103edca189 R12: dffffc0000000000
R13: 1ffff92000267fd1 R14: 0000000000000600 R15: 0000000000000015
FS:  00007f2c2d6df6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000b000 CR3: 0000000132ece000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 do_linkat+0x171/0x560 fs/namei.c:4801
 __do_sys_link fs/namei.c:4851 [inline]
 __se_sys_link fs/namei.c:4849 [inline]
 __x64_sys_link+0x86/0xa0 fs/namei.c:4849
 x64_sys_call+0x1cf5/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:87
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f2c2d7332f9
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2c2d6df218 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f2c2d7e8b58 RCX: 00007f2c2d7332f9
RDX: 00007f2c2d7332f9 RSI: 0000200000000400 RDI: 0000200000000280
RBP: 00007f2c2d7e8b50 R08: 33203a6b63617473 R09: 33203a6b63617473
R10: 33203a6b63617473 R11: 0000000000000246 R12: 00007f2c2d7b40dc
R13: 000020000000a280 R14: 00007ffdbbf4c770 R15: 00007ffdbbf4c858
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__d_entry_type include/linux/dcache.h:414 [inline]
RIP: 0010:d_is_miss include/linux/dcache.h:419 [inline]
RIP: 0010:d_is_negative include/linux/dcache.h:465 [inline]
RIP: 0010:d_is_positive include/linux/dcache.h:475 [inline]
RIP: 0010:filename_create+0x25a/0x450 fs/namei.c:4041
Code: 33 45 09 fe 48 8d 7c 24 60 44 89 f2 e8 6f 5f ff ff 48 3d 01 f0 ff ff 49 89 c7 72 07 e8 0f ae 98 ff eb 62 48 89 c1 48 c1 e9 03 <42> 0f b6 0c 21 84 c9 0f 85 c1 01 00 00 be 00 00 70 00 23 30 41 0f
RSP: 0018:ffffc9000133fd20 EFLAGS: 00010203

RAX: 0000000000000015 RBX: ffffc9000133fe88 RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888110cd37f0
RBP: ffffc9000133fdf0 R08: ffff8881f6e50c47 R09: 1ffff1103edca188
R10: dffffc0000000000 R11: ffffed103edca189 R12: dffffc0000000000
R13: 1ffff92000267fd1 R14: 0000000000000600 R15: 0000000000000015
FS:  00007f2c2d6df6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000b000 CR3: 0000000132ece000 CR4: 00000000003526b0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	45 09 fe             	or     %r15d,%r14d
   3:	48 8d 7c 24 60       	lea    0x60(%rsp),%rdi
   8:	44 89 f2             	mov    %r14d,%edx
   b:	e8 6f 5f ff ff       	call   0xffff5f7f
  10:	48 3d 01 f0 ff ff    	cmp    $0xfffffffffffff001,%rax
  16:	49 89 c7             	mov    %rax,%r15
  19:	72 07                	jb     0x22
  1b:	e8 0f ae 98 ff       	call   0xff98ae2f
  20:	eb 62                	jmp    0x84
  22:	48 89 c1             	mov    %rax,%rcx
  25:	48 c1 e9 03          	shr    $0x3,%rcx
* 29:	42 0f b6 0c 21       	movzbl (%rcx,%r12,1),%ecx <-- trapping instruction
  2e:	84 c9                	test   %cl,%cl
  30:	0f 85 c1 01 00 00    	jne    0x1f7
  36:	be 00 00 70 00       	mov    $0x700000,%esi
  3b:	23 30                	and    (%rax),%esi
  3d:	41                   	rex.B
  3e:	0f                   	.byte 0xf

Crashes (34):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/26 16:13 android16-6.12 7ee04de323f7 a2b77b9e .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/05/05 06:24 android16-6.12 ea1f41c3bdb9 a898ba9c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/01/22 20:29 android16-6.12 da606bc67c00 82c9c083 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/09/27 04:50 android16-6.12 e34340c0d860 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/09/27 04:11 android16-6.12 e34340c0d860 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/09/27 03:33 android16-6.12 e34340c0d860 001c9061 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/07/21 07:03 android16-6.12 5aeb3ef16d03 de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/07/20 16:46 android16-6.12 c3f9cafa739b de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/07/04 14:23 android16-6.12 d36feda1de57 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/06/27 19:15 android16-6.12 220923cf9f76 fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/05/05 07:43 android16-6.12 ea1f41c3bdb9 a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/05/05 05:31 android16-6.12 ea1f41c3bdb9 a898ba9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/28 01:19 android16-6.12 18d3876842e1 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/20 11:25 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/19 23:21 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/19 20:22 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/19 01:49 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/19 01:49 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/18 22:18 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/18 10:01 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/18 08:08 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/18 08:08 android16-6.12 6532ca3bb1f7 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/04/09 04:26 android16-6.12 664e35856784 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/03/30 10:56 android16-6.12 49e3211dc6f7 dcaebc52 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/03/06 11:43 android16-6.12 6a6bc2e596fe 31e9c887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/02/21 04:32 android16-6.12 7712ca595283 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/02/14 19:55 android16-6.12 837ec018b485 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/02/01 11:27 android16-6.12 c13babfee861 6b8752f2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/01/25 06:15 android16-6.12 83c6be0e1efe 40acda8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2026/01/22 19:32 android16-6.12 da606bc67c00 82c9c083 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/10/19 05:03 android16-6.12 285c84322cb6 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/10/17 07:55 android16-6.12 ab30be3dcaff 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/10/07 18:15 android16-6.12 9f1850d39f56 8ef35d49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
2025/09/27 02:53 android16-6.12 e34340c0d860 001c9061 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-12-rust general protection fault in filename_create
* Struck through repros no longer work on HEAD.