RSP: 002b:00007f81ca81c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f81c9ba5fa0 RCX: 00007f81c998d169
RDX: 0000000000000002 RSI: 0000200000002fc0 RDI: 0000000000000003
RBP: 00007f81ca81c090 R08: 0000000000000019 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f81c9ba5fa0 R15: 00007ffdae98c7a8
 </TASK>
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 8178 Comm: syz.3.575 Not tainted 6.14.0-syzkaller-13183-g06a22366d6a1 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:gpiolib_seq_stop+0x4c/0xe0 drivers/gpio/gpiolib.c:5279
Code: 48 c1 ea 03 80 3c 02 00 0f 85 98 00 00 00 48 8b 9b e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 60 8b
RSP: 0018:ffffc90003f0f9a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff888028a694b8
RDX: 0000000000000000 RSI: ffffffff8503c46e RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: ffffffff8e58acb3 R11: 0000000000000001 R12: ffffffff8bf83ec0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888028a694b8
FS:  00007f81ca81c6c0(0000) GS:ffff888124abc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002fc0 CR3: 0000000012340000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 traverse.part.0.constprop.0+0x2bd/0x640 fs/seq_file.c:131
 traverse fs/seq_file.c:98 [inline]
 seq_read_iter+0x932/0x12c0 fs/seq_file.c:195
 seq_read+0x39e/0x4e0 fs/seq_file.c:162
 full_proxy_read+0x13c/0x200 fs/debugfs/file.c:393
 do_loop_readv_writev fs/read_write.c:845 [inline]
 do_loop_readv_writev fs/read_write.c:833 [inline]
 vfs_readv+0x6bc/0x8a0 fs/read_write.c:1018
 do_preadv+0x1af/0x270 fs/read_write.c:1130
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f81c998d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f81ca81c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00007f81c9ba5fa0 RCX: 00007f81c998d169
RDX: 0000000000000002 RSI: 0000200000002fc0 RDI: 0000000000000003
RBP: 00007f81ca81c090 R08: 0000000000000019 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f81c9ba5fa0 R15: 00007ffdae98c7a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gpiolib_seq_stop+0x4c/0xe0 drivers/gpio/gpiolib.c:5279
Code: 48 c1 ea 03 80 3c 02 00 0f 85 98 00 00 00 48 8b 9b e0 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 04 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 60 8b
RSP: 0018:ffffc90003f0f9a0 EFLAGS: 00010247
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffff888028a694b8
RDX: 0000000000000000 RSI: ffffffff8503c46e RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000dc0 R09: 00000000ffffffff
R10: ffffffff8e58acb3 R11: 0000000000000001 R12: ffffffff8bf83ec0
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888028a694b8
FS:  00007f81ca81c6c0(0000) GS:ffff888124abc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f767717b338 CR3: 0000000012340000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 98 00 00 00    	jne    0xa6
   e:	48 8b 9b e0 00 00 00 	mov    0xe0(%rbx),%rbx
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	48 8d 7b 04          	lea    0x4(%rbx),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 14 02          	movzbl (%rdx,%rax,1),%edx <-- trapping instruction
  2e:	48 89 f8             	mov    %rdi,%rax
  31:	83 e0 07             	and    $0x7,%eax
  34:	83 c0 03             	add    $0x3,%eax
  37:	38 d0                	cmp    %dl,%al
  39:	7c 04                	jl     0x3f
  3b:	84 d2                	test   %dl,%dl
  3d:	75 60                	jne    0x9f
  3f:	8b                   	.byte 0x8b