syzbot


general protection fault in dir_rename_wrap

Status: upstream: reported C repro on 2024/05/20 23:47
Reported-by: syzbot+b6c60c3311f9f1295961@syzkaller.appspotmail.com
First crash: 27d, last: 13d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-6-1 general protection fault in dir_rename_wrap origin:downstream C 1 23d 23d 0/2 upstream: reported C repro on 2024/05/25 07:40
android-5-10 general protection fault in dir_rename_wrap C 2 15d 29d 0/2 upstream: reported C repro on 2024/05/19 11:46
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/06/04 01:00 13m retest repro android12-5.4 report log

Sample crash report:
incfs: mount failed -22
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 384 Comm: syz-executor379 Not tainted 5.4.268-syzkaller-00012-g51cf29fc2bfc #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:dir_rename fs/incfs/vfs.c:1374 [inline]
RIP: 0010:dir_rename_wrap+0x1a5/0x4f0 fs/incfs/vfs.c:84
Code: 7a ff eb 05 e8 4c 85 7a ff bb f0 ff ff ff 48 8b 6c 24 18 e9 02 03 00 00 e8 38 85 7a ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 2c 68 aa ff 48 8b 1b 48 8b 44 24
RSP: 0018:ffff8881e2c1fac0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff8881db22de80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881db671018 R08: ffffffff81e9c0e1 R09: ffffed103c583f49
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881db671028 R14: ffff8881dc000000 R15: 1ffff1103b6ce203
FS:  00007f19cd39e6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f19cd41c450 CR3: 00000001db038000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_rename+0x90e/0xda0 fs/namei.c:4584
 do_renameat2+0x889/0x1110 fs/namei.c:4733
 __do_sys_renameat2 fs/namei.c:4768 [inline]
 __se_sys_renameat2 fs/namei.c:4765 [inline]
 __x64_sys_renameat2+0xb1/0xc0 fs/namei.c:4765
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
Modules linked in:
---[ end trace 3c95681bd66b3bfe ]---
RIP: 0010:dir_rename fs/incfs/vfs.c:1374 [inline]
RIP: 0010:dir_rename_wrap+0x1a5/0x4f0 fs/incfs/vfs.c:84
Code: 7a ff eb 05 e8 4c 85 7a ff bb f0 ff ff ff 48 8b 6c 24 18 e9 02 03 00 00 e8 38 85 7a ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 2c 68 aa ff 48 8b 1b 48 8b 44 24
RSP: 0018:ffff8881e2c1fac0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff8881db22de80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8881db671018 R08: ffffffff81e9c0e1 R09: ffffed103c583f49
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff8881db671028 R14: ffff8881dc000000 R15: 1ffff1103b6ce203
FS:  00007f19cd39e6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555a9bf9b068 CR3: 00000001db038000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	7a ff                	jp     0x1
   2:	eb 05                	jmp    0x9
   4:	e8 4c 85 7a ff       	call   0xff7a8555
   9:	bb f0 ff ff ff       	mov    $0xfffffff0,%ebx
   e:	48 8b 6c 24 18       	mov    0x18(%rsp),%rbp
  13:	e9 02 03 00 00       	jmp    0x31a
  18:	e8 38 85 7a ff       	call   0xff7a8555
  1d:	31 db                	xor    %ebx,%ebx
  1f:	48 83 c3 08          	add    $0x8,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 2c 68 aa ff       	call   0xffaa6865
  39:	48 8b 1b             	mov    (%rbx),%rbx
  3c:	48                   	rex.W
  3d:	8b                   	.byte 0x8b
  3e:	44                   	rex.R
  3f:	24                   	.byte 0x24

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/20 23:46 android12-5.4 51cf29fc2bfc c0f1611a .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-4-kasan general protection fault in dir_rename_wrap
* Struck through repros no longer work on HEAD.