syzbot


general protection fault in dir_rename_wrap

Status: upstream: reported C repro on 2024/05/19 11:46
Reported-by: syzbot+fb05fedef83641091a1e@syzkaller.appspotmail.com
First crash: 25d, last: 11d
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 general protection fault in dir_rename_wrap C 1 9d16h 23d 0/2 upstream: reported C repro on 2024/05/20 23:47
android-6-1 general protection fault in dir_rename_wrap origin:downstream C 1 19d 19d 0/2 upstream: reported C repro on 2024/05/25 07:40
Last patch testing requests (1)
Created Duration User Patch Repo Result
2024/06/02 12:00 12m retest repro android13-5.10-lts report log

Sample crash report:
incfs: mount failed -22
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 302 Comm: syz-executor219 Not tainted 5.10.210-syzkaller-00394-g70b6ab09a34b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:dir_rename fs/incfs/vfs.c:1375 [inline]
RIP: 0010:dir_rename_wrap+0x1e5/0x570 fs/incfs/vfs.c:85
Code: bb f0 ff ff ff 4c 8b 75 b8 e9 4c 03 00 00 e8 c2 ca 5f ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 ad 4a 9d ff 48 8b 1b 48 8b 45 c8 48
RSP: 0018:ffffc90000b77b00 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b77b70 R08: ffffffff820ade0a R09: fffff5200016ef51
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1102335a303
R13: ffff88811c92f110 R14: ffff888119ad1818 R15: ffff888119ad1828
FS:  00007fbc20f3c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffff77ea7c0 CR3: 000000011d38f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 vfs_rename+0x9fb/0xeb0 fs/namei.c:4474
 do_renameat2+0xa56/0x1240 fs/namei.c:4619
 __do_sys_renameat2 fs/namei.c:4657 [inline]
 __se_sys_renameat2 fs/namei.c:4654 [inline]
 __x64_sys_renameat2+0xdd/0xf0 fs/namei.c:4654
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7fbc20f7ea69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbc20f3c218 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fbc210063c8 RCX: 00007fbc20f7ea69
RDX: 0000000000000004 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007fbc210063c0 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 00007fbc20fd31ec
R13: 0031656c69662f2e R14: 00007fbc20fd3052 R15: 676e69646e65702e
Modules linked in:
---[ end trace 4f6f9261e2c83fb0 ]---
RIP: 0010:dir_rename fs/incfs/vfs.c:1375 [inline]
RIP: 0010:dir_rename_wrap+0x1e5/0x570 fs/incfs/vfs.c:85
Code: bb f0 ff ff ff 4c 8b 75 b8 e9 4c 03 00 00 e8 c2 ca 5f ff 31 db 48 83 c3 08 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 ad 4a 9d ff 48 8b 1b 48 8b 45 c8 48
RSP: 0018:ffffc90000b77b00 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000008 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b77b70 R08: ffffffff820ade0a R09: fffff5200016ef51
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1102335a303
R13: ffff88811c92f110 R14: ffff888119ad1818 R15: ffff888119ad1828
FS:  00007fbc20f3c6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055d5aea86038 CR3: 000000011d38f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	bb f0 ff ff ff       	mov    $0xfffffff0,%ebx
   5:	4c 8b 75 b8          	mov    -0x48(%rbp),%r14
   9:	e9 4c 03 00 00       	jmp    0x35a
   e:	e8 c2 ca 5f ff       	call   0xff5fcad5
  13:	31 db                	xor    %ebx,%ebx
  15:	48 83 c3 08          	add    $0x8,%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 ad 4a 9d ff       	call   0xff9d4ae5
  38:	48 8b 1b             	mov    (%rbx),%rbx
  3b:	48 8b 45 c8          	mov    -0x38(%rbp),%rax
  3f:	48                   	rex.W

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/05/19 11:40 android13-5.10-lts 70b6ab09a34b c0f1611a .config strace log report syz C [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dir_rename_wrap
2024/05/19 11:00 android13-5.10-lts 70b6ab09a34b c0f1611a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-5-10 general protection fault in dir_rename_wrap
* Struck through repros no longer work on HEAD.