Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 6601 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00282-g1973160c90d7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:do_inode_permission fs/namei.c:523 [inline]
RIP: 0010:inode_permission+0x62/0x460 fs/namei.c:592
Code: e3 02 48 89 5c 24 10 89 6c 24 0c 0f 85 cf 00 00 00 4d 89 e5 e8 df d1 86 ff 4c 89 f5 4d 8d 66 02 4c 89 e3 48 c1 eb 03 4d 89 fe <42> 0f b6 04 3b 84 c0 0f 85 16 03 00 00 45 0f b7 3c 24 44 89 fe 83
RSP: 0018:ffffc9000420fa50 EFLAGS: 00010246
RAX: ffffffff823aece1 RBX: 0000000000000000 RCX: ffff88807ea6da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff823aecbb R09: ffffffff823c56f6
R10: 0000000000000002 R11: ffff88807ea6da00 R12: 0000000000000002
R13: ffffffff8ec8ee80 R14: dffffc0000000000 R15: dffffc0000000000
FS:  000055557a89a500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f774f96f01e CR3: 000000003447c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 may_lookup fs/namei.c:1821 [inline]
 link_path_walk+0x204/0xea0 fs/namei.c:2427
 path_lookupat+0xa9/0x450 fs/namei.c:2635
 filename_lookup+0x2a3/0x670 fs/namei.c:2665
 user_path_at+0x3a/0x60 fs/namei.c:3072
 do_mount fs/namespace.c:3897 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x297/0x3c0 fs/namespace.c:4088
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3181b8e58a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe1ae4b9c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3181b8e58a
RDX: 00007f3181c0e5b8 RSI: 00007f3181c0e5c0 RDI: 0000000000000000
RBP: 00007ffe1ae4ba40 R08: 0000000000000000 R09: 00007ffe1ae4ba40
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe1ae4ba40
R13: 00007ffe1ae4ba48 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:do_inode_permission fs/namei.c:523 [inline]
RIP: 0010:inode_permission+0x62/0x460 fs/namei.c:592
Code: e3 02 48 89 5c 24 10 89 6c 24 0c 0f 85 cf 00 00 00 4d 89 e5 e8 df d1 86 ff 4c 89 f5 4d 8d 66 02 4c 89 e3 48 c1 eb 03 4d 89 fe <42> 0f b6 04 3b 84 c0 0f 85 16 03 00 00 45 0f b7 3c 24 44 89 fe 83
RSP: 0018:ffffc9000420fa50 EFLAGS: 00010246
RAX: ffffffff823aece1 RBX: 0000000000000000 RCX: ffff88807ea6da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff823aecbb R09: ffffffff823c56f6
R10: 0000000000000002 R11: ffff88807ea6da00 R12: 0000000000000002
R13: ffffffff8ec8ee80 R14: dffffc0000000000 R15: dffffc0000000000
FS:  000055557a89a500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564d20c0c950 CR3: 000000003447c000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e3 02                	jrcxz  0x4
   2:	48 89 5c 24 10       	mov    %rbx,0x10(%rsp)
   7:	89 6c 24 0c          	mov    %ebp,0xc(%rsp)
   b:	0f 85 cf 00 00 00    	jne    0xe0
  11:	4d 89 e5             	mov    %r12,%r13
  14:	e8 df d1 86 ff       	call   0xff86d1f8
  19:	4c 89 f5             	mov    %r14,%rbp
  1c:	4d 8d 66 02          	lea    0x2(%r14),%r12
  20:	4c 89 e3             	mov    %r12,%rbx
  23:	48 c1 eb 03          	shr    $0x3,%rbx
  27:	4d 89 fe             	mov    %r15,%r14
* 2a:	42 0f b6 04 3b       	movzbl (%rbx,%r15,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 16 03 00 00    	jne    0x34d
  37:	45 0f b7 3c 24       	movzwl (%r12),%r15d
  3c:	44 89 fe             	mov    %r15d,%esi
  3f:	83                   	.byte 0x83