general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 1 PID: 11420 Comm: syz-executor317 Not tainted 6.4.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:ext4_acquire_dquot+0xc5/0x3d0 fs/ext4/super.c:6810
Code: c1 ea 03 80 3c 02 00 0f 85 0e 03 00 00 4f 8b bc e5 30 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dd 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffffc9000ae676c8 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffffffff8a6454c0 RCX: 0000000000000000
RDX: 0000000000000005 RSI: ffffffff823ae5ca RDI: 0000000000000028
RBP: ffff8880774ec380 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888071d56000 R14: ffff8880774ec3a0 R15: 0000000000000000
FS:  00007f1e20ffe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555617f668 CR3: 000000001ec58000 CR4: 0000000000350ee0
Call Trace:
 <TASK>
 dqget+0x67d/0x1080 fs/quota/dquot.c:914
 __dquot_initialize+0x560/0xbe0 fs/quota/dquot.c:1492
 dquot_initialize fs/quota/dquot.c:1550 [inline]
 dquot_file_open fs/quota/dquot.c:2181 [inline]
 dquot_file_open+0x90/0xb0 fs/quota/dquot.c:2175
 ext4_file_open fs/ext4/file.c:904 [inline]
 ext4_file_open+0x35d/0xbf0 fs/ext4/file.c:873
 do_dentry_open+0x6cc/0x13f0 fs/open.c:920
 do_open fs/namei.c:3636 [inline]
 path_openat+0x1baa/0x2750 fs/namei.c:3791
 do_filp_open+0x1ba/0x410 fs/namei.c:3818
 do_sys_openat2+0x16d/0x4c0 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_open fs/open.c:1380 [inline]
 __se_sys_open fs/open.c:1376 [inline]
 __x64_sys_open+0x11d/0x1c0 fs/open.c:1376
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f1e2945c489
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 18 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1e20ffe2f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f1e294d97a0 RCX: 00007f1e2945c489
RDX: 0000000000000000 RSI: 000000000014937e RDI: 0000000020000180
RBP: 00007f1e294a666c R08: 00007f1e20ffe700 R09: 0000000000000000
R10: 00007f1e20ffe700 R11: 0000000000000246 R12: 756f726776737973
R13: 636f6c6c61646c6f R14: 0030656c69662f2e R15: 00007f1e294d97a8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_acquire_dquot+0xc5/0x3d0 fs/ext4/super.c:6810
Code: c1 ea 03 80 3c 02 00 0f 85 0e 03 00 00 4f 8b bc e5 30 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 28 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 dd 02 00 00 48 b8 00 00 00 00 00 fc ff df 4d 8b
RSP: 0018:ffffc9000ae676c8 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: ffffffff8a6454c0 RCX: 0000000000000000
RDX: 0000000000000005 RSI: ffffffff823ae5ca RDI: 0000000000000028
RBP: ffff8880774ec380 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888071d56000 R14: ffff8880774ec3a0 R15: 0000000000000000
FS:  00007f1e20ffe700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e20ffe718 CR3: 000000001ec58000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
   0:	c1 ea 03             	shr    $0x3,%edx
   3:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   7:	0f 85 0e 03 00 00    	jne    0x31b
   d:	4f 8b bc e5 30 02 00 	mov    0x230(%r13,%r12,8),%r15
  14:	00
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	49 8d 7f 28          	lea    0x28(%r15),%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 dd 02 00 00    	jne    0x311
  34:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  3b:	fc ff df
  3e:	4d                   	rex.WRB
  3f:	8b                   	.byte 0x8b