syzbot

 sign-in | mailing list | source | docs
🐞 Open [88]
🐞 Fixed [11]
🐞 Invalid [118]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap
💬 Send us feedback

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: 297d, last: 13h50m
▶ ▼ 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 C done error 49 7d00h 1081d 0/2 upstream: reported C repro on 2023/08/05 10:34
android-5-15 general protection fault in filename_create origin:downstream 2 C error unreliable 49 30d 1179d 0/2 upstream: reported C repro on 2023/04/29 15:06
android-5-10 general protection fault in filename_create 2 C 133 17d 1053d 0/2 upstream: reported C repro on 2023/09/02 15:10
android-6-12 general protection fault in filename_create 2 1 388d 388d 0/1 auto-obsoleted due to no activity on 2025/09/26 14:56
upstream BUG: corrupted list in filename_create fs 8 1 251d 247d 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
2026/06/06 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
2026/03/21 07:45 11m retest repro android16-6.12 report log
2026/03/21 07:45 7m retest repro android16-6.12 report log
2026/01/12 01:23 3m retest repro android16-6.12 error
2026/01/12 01:23 7m retest repro android16-6.12 error
2025/12/06 14:53 4m retest repro android16-6.12 error

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: 1 UID: 0 PID: 384 Comm: syz.2.17 Not tainted syzkaller #0 21e0851607c2bcce87f6d1c77002e5a32d0b18de
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
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+0x2b3/0x480 fs/namei.c:4041
Code: 89 de e8 b0 27 99 ff 85 db 0f 84 8d 00 00 00 e8 63 23 99 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 93 01 00 00 44 8b 20 44 89 e6 81 e6 00
RSP: 0018:ffffc9000121fd20 EFLAGS: 00010202
RAX: 0000000000000013 RBX: 1ffff92000243fcd RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888112c52190
RBP: ffffc9000121fdf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000243f20 R12: dffffc0000000000
R13: ffffc9000121fe68 R14: 0000000000000600 R15: 0000000000000013
FS:  00007ff7a8deb6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000afe0 CR3: 000000011647e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 do_mknodat+0x18d/0x4f0 fs/namei.c:4180
 __do_sys_mknod fs/namei.c:4226 [inline]
 __se_sys_mknod fs/namei.c:4224 [inline]
 __x64_sys_mknod+0x90/0xa0 fs/namei.c:4224
 x64_sys_call+0x2a40/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:134
 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: 0033:0x7ff7a8f9cdd9
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:00007ff7a8deb028 EFLAGS: 00000246 ORIG_RAX: 0000000000000085
RAX: ffffffffffffffda RBX: 00007ff7a9215fa0 RCX: 00007ff7a8f9cdd9
RDX: 0000000000000704 RSI: 0000000000001000 RDI: 00002000000002c0
RBP: 00007ff7a9032d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff7a9216038 R14: 00007ff7a9215fa0 R15: 00007fff45d018f8
 </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+0x2b3/0x480 fs/namei.c:4041
Code: 89 de e8 b0 27 99 ff 85 db 0f 84 8d 00 00 00 e8 63 23 99 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 93 01 00 00 44 8b 20 44 89 e6 81 e6 00
RSP: 0018:ffffc9000121fd20 EFLAGS: 00010202
RAX: 0000000000000013 RBX: 1ffff92000243fcd RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff888112c52190
RBP: ffffc9000121fdf0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000243f20 R12: dffffc0000000000
R13: ffffc9000121fe68 R14: 0000000000000600 R15: 0000000000000013
FS:  00007ff7a8deb6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff7a8fea4c0 CR3: 000000011647e000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	89 de                	mov    %ebx,%esi
   2:	e8 b0 27 99 ff       	call   0xff9927b7
   7:	85 db                	test   %ebx,%ebx
   9:	0f 84 8d 00 00 00    	je     0x9c
   f:	e8 63 23 99 ff       	call   0xff992377
  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 93 01 00 00    	jne    0x1ca
  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 (33):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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.