general protection fault in path_put

Status: upstream: reported C repro on 2026/07/31 17:14
Subsystems: fs
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+1686d17ae576cc5f8a57@syzkaller.appspotmail.com
First crash: 48d, last: 14h51m
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
521fb98d patching 💥 general protection fault in path_put 2026/08/31 20:44 2026/08/31 20:44 2026/08/31 20:49 2f52988a
66d35475 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ general protection fault in path_put 2026/07/31 01:34 2026/07/31 01:34 2026/07/31 01:40 aaffb173
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [fs?] general protection fault in path_put 0 (2) 2026/08/03 03:24
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 KASAN: use-after-free Read in path_put 19 8 191d 197d 0/2 auto-obsoleted due to no activity on 2026/06/07 07:18
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/08/03 03:24 24m ryan.mehri1@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 11028ab62899 OK log

Sample crash report:
RBP: 00007fffaa9085c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007feae0225fac R14: 00007feae0225fa0 R15: 00007feae0225fa0
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 UID: 0 PID: 5912 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:path_put+0x22/0x70 fs/namei.c:722
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 a3 61 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00
RSP: 0018:ffffc900040c7a68 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffffffff8291fe9d RDI: 0000000000000044
RBP: ffffc900040c7bf8 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff9b74bc40 R11: 0000000000000000 R12: ffff888022ab1f88
R13: ffff88802dcb4a60 R14: ffff888022a9c680 R15: fffffffffffffff4
FS:  000055557d29f500(0000) GS:ffff8880d5ddc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f63fff CR3: 000000003cf56000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 free_trace_uprobe kernel/trace/trace_uprobe.c:374 [inline]
 free_trace_uprobe kernel/trace/trace_uprobe.c:369 [inline]
 __free_free_trace_uprobe kernel/trace/trace_uprobe.c:536 [inline]
 __trace_uprobe_create+0x96d/0x22f0 kernel/trace/trace_uprobe.c:545
 trace_probe_create+0xef/0x100 kernel/trace/trace_probe.c:2371
 dyn_event_create+0x46/0x70 kernel/trace/trace_dynevent.c:128
 create_or_delete_trace_uprobe+0x5a/0xb0 kernel/trace/trace_uprobe.c:739
 trace_parse_run_command+0x1ab/0x3b0 kernel/trace/trace.c:9565
 vfs_write+0x2aa/0x1050 fs/read_write.c:685
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feadff9df99
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:00007fffaa908558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007feae0225fa0 RCX: 00007feadff9df99
RDX: 000000000000000f RSI: 0000200000000180 RDI: 0000000000000004
RBP: 00007fffaa9085c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007feae0225fac R14: 00007feae0225fa0 R15: 00007feae0225fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:path_put+0x22/0x70 fs/namei.c:722
Code: 90 90 90 90 90 90 90 90 f3 0f 1e fa 53 48 89 fb e8 a3 61 78 ff 48 8d 7b 08 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 29 48 8b 7b 08 e8 4f 97 04 00 48 89 da 48 b8 00 00
RSP: 0018:ffffc900040c7a68 EFLAGS: 00010203
RAX: dffffc0000000000 RBX: 000000000000003c RCX: 0000000000000000
RDX: 0000000000000008 RSI: ffffffff8291fe9d RDI: 0000000000000044
RBP: ffffc900040c7bf8 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff9b74bc40 R11: 0000000000000000 R12: ffff888022ab1f88
R13: ffff88802dcb4a60 R14: ffff888022a9c680 R15: fffffffffffffff4
FS:  000055557d29f500(0000) GS:ffff8880d5edc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32f24008 CR3: 000000003cf56000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	f3 0f 1e fa          	endbr64
   c:	53                   	push   %rbx
   d:	48 89 fb             	mov    %rdi,%rbx
  10:	e8 a3 61 78 ff       	call   0xff7861b8
  15:	48 8d 7b 08          	lea    0x8(%rbx),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 29                	jne    0x59
  30:	48 8b 7b 08          	mov    0x8(%rbx),%rdi
  34:	e8 4f 97 04 00       	call   0x49788
  39:	48 89 da             	mov    %rbx,%rdx
  3c:	48                   	rex.W
  3d:	b8                   	.byte 0xb8

Crashes (173):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/30 14:12 upstream 11028ab62899 abc81b93 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/09/03 01:59 upstream 89a312991dc6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in path_put
2026/09/03 00:45 upstream 89a312991dc6 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in path_put
2026/09/02 07:49 upstream 786262be6048 587f6b29 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in path_put
2026/09/01 04:51 upstream bf1079577a11 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in path_put
2026/08/31 14:52 upstream cee9395acd80 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in path_put
2026/08/29 06:14 upstream c20313e98b04 2f52988a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs general protection fault in path_put
2026/08/26 12:47 upstream 45c13f3f9e3b 6a91adb4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root general protection fault in path_put
2026/08/24 01:51 upstream b6b019a1d9b9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in path_put
2026/08/23 20:28 upstream 2709dd5ae32f 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root general protection fault in path_put
2026/08/23 18:48 upstream 2709dd5ae32f 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root general protection fault in path_put
2026/09/04 13:36 upstream bc35965f6940 44dda43b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/09/04 02:33 upstream 8ab1afb2eb24 801f0966 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/09/02 15:27 upstream 89a312991dc6 74e93e68 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/09/02 14:53 upstream 89a312991dc6 74e93e68 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in path_put
2026/09/02 05:05 upstream 89a312991dc6 587f6b29 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/09/02 00:01 upstream 89a312991dc6 587f6b29 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in path_put
2026/09/01 03:49 upstream bf1079577a11 316d9396 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/30 21:00 upstream a23cbb05744b 2f52988a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in path_put
2026/08/30 13:05 upstream 08dbfad3f504 2f52988a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/29 23:26 upstream 08dbfad3f504 2f52988a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/29 07:42 upstream cf72cbb39da8 2f52988a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/27 15:00 upstream 818bebeb63dd c53a1b9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/26 21:44 upstream 818bebeb63dd a2b77b9e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/25 19:57 upstream 818bebeb63dd a9a1fc32 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/25 14:52 upstream 818bebeb63dd a9a1fc32 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in path_put
2026/08/25 04:36 upstream 818bebeb63dd 614e416a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root general protection fault in path_put
2026/08/24 11:34 upstream 818bebeb63dd b55bd4c3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/22 04:43 upstream 818bebeb63dd 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/21 09:13 upstream 818bebeb63dd 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/21 04:16 upstream 9d2ed026f031 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream general protection fault in path_put
2026/08/25 17:33 upstream 66498c75b4f8 a9a1fc32 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 general protection fault in path_put
2026/09/16 08:18 linux-next 9d80aa4617b3 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/15 18:22 linux-next 9d80aa4617b3 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/15 13:35 linux-next 9d80aa4617b3 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/12 13:57 linux-next 9d80aa4617b3 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/12 04:04 linux-next 9d80aa4617b3 b6a5eeb7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/10 00:20 linux-next 9d80aa4617b3 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/09 23:14 linux-next 9d80aa4617b3 4e8b1cc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/08 23:33 linux-next 9d80aa4617b3 243b72f1 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/07 08:29 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/07 08:19 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in path_put
2026/09/07 06:11 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/06 18:28 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in path_put
2026/09/06 06:38 linux-next 9d80aa4617b3 4f7b22a0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in path_put
2026/09/04 23:29 linux-next 9d80aa4617b3 3f042c7b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/09/04 11:51 linux-next 9d80aa4617b3 801f0966 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in path_put
2026/09/02 20:36 linux-next 32b6ef9a5d0e 85995287 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/08/28 00:16 linux-next 3d83758432b5 e2fa417d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/08/26 23:37 linux-next f82a5da2f049 a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/08/25 23:14 linux-next a8406e6c0b79 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root general protection fault in path_put
2026/08/25 02:42 linux-next 4b18edbd8e70 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
2026/08/23 17:22 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce general protection fault in path_put
* Struck through repros no longer work on HEAD.