Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 UID: 0 PID: 296 Comm: syz-executor Not tainted syzkaller #0 0c030cdb70aa168b576854936edd9d842bbb5d94
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
RIP: 0010:current_umask+0x4d/0x80 fs/fs_struct.c:159
Code: 81 c3 38 09 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 51 6f e5 ff 48 8b 1b 48 83 c3 0c 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 0c 8b 03 5b 41 5e 5d c3 cc cc cc cc cc 89
RSP: 0018:ffffc9000b60f780 EFLAGS: 00010203
RAX: 0000000000000001 RBX: 000000000000000c RCX: ffff8881037f62c0
RDX: 0000000000000000 RSI: ffffffff87ef3e40 RDI: 0000000000000000
RBP: ffffc9000b60f790 R08: ffff8881037f62c0 R09: 0000000000000002
R10: ffffffffffffffa1 R11: 0000000000000000 R12: 1ffff920016c1f00
R13: ffff888119f70070 R14: dffffc0000000000 R15: 1ffff110233ee00e
FS:  0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555cae6998 CR3: 0000000104b1a000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 posix_acl_create+0x18a/0x3d0 fs/posix_acl.c:649
 simple_acl_create+0x3e/0x1c0 fs/posix_acl.c:1041
 shmem_mknod+0x83/0x200 mm/shmem.c:3686
 vfs_mknod+0x608/0x6d0 fs/namei.c:4143
 vfs_whiteout include/linux/fs.h:1983 [inline]
 ovl_do_whiteout fs/overlayfs/overlayfs.h:388 [inline]
 ovl_whiteout fs/overlayfs/dir.c:78 [inline]
 ovl_cleanup_and_whiteout+0x210/0x6e0 fs/overlayfs/dir.c:118
 ovl_remove_and_whiteout fs/overlayfs/dir.c:791 [inline]
 ovl_do_remove+0x8fa/0xd10 fs/overlayfs/dir.c:914
 ovl_rmdir+0x1e/0x30 fs/overlayfs/dir.c:945
 vfs_rmdir+0x3db/0x560 fs/namei.c:4348
 incfs_kill_sb+0x102/0x220 fs/incfs/vfs.c:1970
 deactivate_locked_super+0xd5/0x270 fs/super.c:478
 deactivate_super+0xb8/0xe0 fs/super.c:511
 cleanup_mnt+0x438/0x4d0 fs/namespace.c:1380
 __cleanup_mnt+0x1d/0x40 fs/namespace.c:1387
 task_work_run+0x1e8/0x260 kernel/task_work.c:246
 exit_task_work include/linux/task_work.h:43 [inline]
 do_exit+0xa46/0x2850 kernel/exit.c:961
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1104
 __do_sys_exit_group kernel/exit.c:1115 [inline]
 __se_sys_exit_group kernel/exit.c:1113 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1113
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f8a4999fb19
Code: Unable to access opcode bytes at 0x7f8a4999faef.
RSP: 002b:00007ffe83890ba8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f8a49a37025 RCX: 00007f8a4999fb19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 0000000000000000 R09: 00007f8a49a36fb3
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe83891e60
R13: 00007f8a49a36fb3 R14: 000055555cabb4e8 R15: 00007ffe83894020
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:current_umask+0x4d/0x80 fs/fs_struct.c:159
Code: 81 c3 38 09 00 00 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 51 6f e5 ff 48 8b 1b 48 83 c3 0c 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 75 0c 8b 03 5b 41 5e 5d c3 cc cc cc cc cc 89
RSP: 0018:ffffc9000b60f780 EFLAGS: 00010203
RAX: 0000000000000001 RBX: 000000000000000c RCX: ffff8881037f62c0
RDX: 0000000000000000 RSI: ffffffff87ef3e40 RDI: 0000000000000000
RBP: ffffc9000b60f790 R08: ffff8881037f62c0 R09: 0000000000000002
R10: ffffffffffffffa1 R11: 0000000000000000 R12: 1ffff920016c1f00
R13: ffff888119f70070 R14: dffffc0000000000 R15: 1ffff110233ee00e
FS:  0000000000000000(0000) GS:ffff8881f6c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555cae6998 CR3: 000000010cb5a000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	81 c3 38 09 00 00    	add    $0x938,%ebx
   6:	48 89 d8             	mov    %rbx,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
  12:	74 08                	je     0x1c
  14:	48 89 df             	mov    %rbx,%rdi
  17:	e8 51 6f e5 ff       	call   0xffe56f6d
  1c:	48 8b 1b             	mov    (%rbx),%rbx
  1f:	48 83 c3 0c          	add    $0xc,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	75 0c                	jne    0x3f
  33:	8b 03                	mov    (%rbx),%eax
  35:	5b                   	pop    %rbx
  36:	41 5e                	pop    %r14
  38:	5d                   	pop    %rbp
  39:	c3                   	ret
  3a:	cc                   	int3
  3b:	cc                   	int3
  3c:	cc                   	int3
  3d:	cc                   	int3
  3e:	cc                   	int3
  3f:	89                   	.byte 0x89