general protection fault, probably for non-canonical address 0xdffffc0000000097: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000004b8-0x00000000000004bf]
CPU: 0 PID: 1214 Comm: kworker/0:1H Not tainted 6.1.0-rc2-syzkaller-00070-g4dc12f37a8e9 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: glock_workqueue glock_work_func
RIP: 0010:is_system_glock fs/gfs2/glock.c:725 [inline]
RIP: 0010:do_xmote+0x48b/0xc40 fs/gfs2/glock.c:835
Code: 03 80 3c 02 00 0f 85 3d 07 00 00 4d 8b b6 18 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d be b8 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 fb 06 00 00 49 3b ae b8 04 00 00 0f 84 8a 05 00
RSP: 0018:ffffc900070cfc50 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888071294000 RCX: 0000000000000000
RDX: 0000000000000097 RSI: ffffffff838942f9 RDI: 00000000000004b8
RBP: ffff888063398fd8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffea00012c4f00 R12: 0000000000000000
R13: ffff888063398ff8 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f734b4f0 CR3: 000000006e69c000 CR4: 0000000000150ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 run_queue+0x3cf/0x660 fs/gfs2/glock.c:914
 glock_work_func+0xbe/0x3a0 fs/gfs2/glock.c:1082
 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:is_system_glock fs/gfs2/glock.c:725 [inline]
RIP: 0010:do_xmote+0x48b/0xc40 fs/gfs2/glock.c:835
Code: 03 80 3c 02 00 0f 85 3d 07 00 00 4d 8b b6 18 07 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d be b8 04 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 fb 06 00 00 49 3b ae b8 04 00 00 0f 84 8a 05 00
RSP: 0018:ffffc900070cfc50 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff888071294000 RCX: 0000000000000000
RDX: 0000000000000097 RSI: ffffffff838942f9 RDI: 00000000000004b8
RBP: ffff888063398fd8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffffea00012c4f00 R12: 0000000000000000
R13: ffff888063398ff8 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f734b4f0 CR3: 000000006e69c000 CR4: 0000000000150ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 3d 07 00 00 4d    	test   %edi,0x4d000007(%rip)        # 0x4d000013
   c:	8b b6 18 07 00 00    	mov    0x718(%rsi),%esi
  12:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  19:	fc ff df
  1c:	49 8d be b8 04 00 00 	lea    0x4b8(%r14),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 fb 06 00 00    	jne    0x72f
  34:	49 3b ae b8 04 00 00 	cmp    0x4b8(%r14),%rbp
  3b:	0f                   	.byte 0xf
  3c:	84                   	.byte 0x84
  3d:	8a                   	.byte 0x8a
  3e:	05                   	.byte 0x5