general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 5275 Comm: kworker/u4:7 Not tainted 6.3.0-rc4-syzkaller-00034-gfcd476ea6a88 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/17/2023
Workqueue: xfs_iwalk-24755 xfs_pwork_work
RIP: 0010:xfs_read_agf+0x7d/0x500 fs/xfs/libxfs/xfs_alloc.c:2990
Code: 82 c7 00 f1 f1 f1 f1 c7 40 04 00 00 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 78 31 c0 e8 0a 40 8c fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 1f 04 00 00 48 8b 2b 0f 1f 44 00 00 48 8d 43 08
RSP: 0018:ffffc9000558f1b8 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807ace3a80 RSI: ffffffff82f69846 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094001 R12: 0000000000000000
R13: 1ffff92000ab1e3b R14: ffffc9000558f2c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0176a9840 CR3: 0000000031d9d000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 xfs_alloc_read_agf+0x102/0xba0 fs/xfs/libxfs/xfs_alloc.c:3027
 xfs_agfl_free_finish_item+0x253/0x6a0 fs/xfs/xfs_extfree_item.c:543
 xfs_defer_finish_one fs/xfs/libxfs/xfs_defer.c:479 [inline]
 xfs_defer_finish_noroll+0xa39/0x1d10 fs/xfs/libxfs/xfs_defer.c:563
 __xfs_trans_commit+0x7c1/0xfa0 fs/xfs/xfs_trans.c:970
 xfs_dquot_disk_alloc+0x9cf/0xb80 fs/xfs/xfs_dquot.c:384
 xfs_qm_dqread+0x4dd/0x570 fs/xfs/xfs_dquot.c:665
 xfs_qm_dqget+0x141/0x660 fs/xfs/xfs_dquot.c:870
 xfs_qm_quotacheck_dqadjust+0xa7/0x4e0 fs/xfs/xfs_qm.c:1085
 xfs_qm_dqusage_adjust+0x3e5/0x570 fs/xfs/xfs_qm.c:1190
 xfs_iwalk_ag_recs+0x449/0x770 fs/xfs/xfs_iwalk.c:220
 xfs_iwalk_run_callbacks+0x1fa/0x4b0 fs/xfs/xfs_iwalk.c:376
 xfs_iwalk_ag+0x731/0x930 fs/xfs/xfs_iwalk.c:482
 xfs_iwalk_ag_work+0x14a/0x1c0 fs/xfs/xfs_iwalk.c:624
 xfs_pwork_work+0x7f/0x160 fs/xfs/xfs_pwork.c:47
 process_one_work+0x991/0x15c0 kernel/workqueue.c:2390
 worker_thread+0x669/0x1090 kernel/workqueue.c:2537
 kthread+0x2e8/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:xfs_read_agf+0x7d/0x500 fs/xfs/libxfs/xfs_alloc.c:2990
Code: 82 c7 00 f1 f1 f1 f1 c7 40 04 00 00 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 44 24 78 31 c0 e8 0a 40 8c fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f 85 1f 04 00 00 48 8b 2b 0f 1f 44 00 00 48 8d 43 08
RSP: 0018:ffffc9000558f1b8 EFLAGS: 00010256
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff88807ace3a80 RSI: ffffffff82f69846 RDI: 0000000000000000
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000094001 R12: 0000000000000000
R13: 1ffff92000ab1e3b R14: ffffc9000558f2c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0176a9840 CR3: 0000000031d9d000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	c7 00 f1 f1 f1 f1    	movl   $0xf1f1f1f1,(%rax)
   6:	c7 40 04 00 00 f3 f3 	movl   $0xf3f30000,0x4(%rax)
   d:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  14:	00 00
  16:	48 89 44 24 78       	mov    %rax,0x78(%rsp)
  1b:	31 c0                	xor    %eax,%eax
  1d:	e8 0a 40 8c fe       	callq  0xfe8c402c
  22:	48 89 d8             	mov    %rbx,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2d:	0f 85 1f 04 00 00    	jne    0x452
  33:	48 8b 2b             	mov    (%rbx),%rbp
  36:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3b:	48 8d 43 08          	lea    0x8(%rbx),%rax