RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 00007ffd7720d247 R09: 00007ffd77210760
R10: 0000000000000009 R11: 0000000000000246 R12: 00007ffd77210760
R13: 00007f3fc0a5889d R14: 000055558a8524a8 R15: 00007ffd77211830
---[ end trace ee3de7ab776b3eb8 ]---
BUG: kernel NULL pointer dereference, address: 0000000000000160
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 342 Comm: syz-executor Tainted: G        W         5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881d611fae0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8199b690
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000160
RBP: ffff8881d611faf0 R08: 0000000000000000 R09: ffffed103bb26160
R10: ffffed103bb26160 R11: 1ffff1103bb2615f R12: 1ffff1103bb171e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  000055558a852500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 00000001ec8d5000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 d_delete_notify include/linux/fsnotify.h:227 [inline]
 vfs_rmdir+0x247/0x3e0 fs/namei.c:4040
 incfs_kill_sb+0xfe/0x210 fs/incfs/vfs.c:1944
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0x14f/0x1d0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1102
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1109
 task_work_run+0x146/0x170 kernel/task_work.c:113
 exit_task_work include/linux/task_work.h:22 [inline]
 do_exit+0xa43/0x2660 kernel/exit.c:861
 do_group_exit+0x13e/0x300 kernel/exit.c:984
 __do_sys_exit_group kernel/exit.c:995 [inline]
 __se_sys_exit_group kernel/exit.c:993 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:993
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f3fc09d6969
Code: Bad RIP value.
RSP: 002b:00007ffd7720f4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f3fc0a588fd RCX: 00007f3fc09d6969
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 00007ffd7720d247 R09: 00007ffd77210760
R10: 0000000000000009 R11: 0000000000000246 R12: 00007ffd77210760
R13: 00007f3fc0a5889d R14: 000055558a8524a8 R15: 00007ffd77211830
Modules linked in:
CR2: 0000000000000160
---[ end trace ee3de7ab776b3eb9 ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:167 [inline]
RIP: 0010:atomic_add_return include/asm-generic/atomic-instrumented.h:72 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic-fallback.h:284 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:421
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 61 c8 c5 ff 48 8d bb 60 01 00 00 be 04 00 00 00 e8 a0 9c f3 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 60 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 81
RSP: 0018:ffff8881d611fae0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8199b690
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000160
RBP: ffff8881d611faf0 R08: 0000000000000000 R09: ffffed103bb26160
R10: ffffed103bb26160 R11: 1ffff1103bb2615f R12: 1ffff1103bb171e2
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  000055558a852500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3fc09d693f CR3: 00000001ec8d5000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	55                   	push   %rbp
   5:	48 89 e5             	mov    %rsp,%rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 61 c8 c5 ff       	call   0xffc5c874
  13:	48 8d bb 60 01 00 00 	lea    0x160(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 a0 9c f3 ff       	call   0xfff39cc4
  24:	41 be 01 00 00 00    	mov    $0x1,%r14d
* 2a:	f0 44 0f c1 b3 60 01 	lock xadd %r14d,0x160(%rbx) <-- trapping instruction
  31:	00 00
  33:	41 ff c6             	inc    %r14d
  36:	bf 02 00 00 00       	mov    $0x2,%edi
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	e8                   	.byte 0xe8
  3f:	81                   	.byte 0x81