path_mount+0x132d/0x1dd0
 __x64_sys_mount+0x27b/0x300
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
loop2: detected capacity change from 0 to 128
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 UID: 0 PID: 14 Comm: ksoftirqd/0 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff888009617b30 EFLAGS: 00010056
RAX: 0000000000000000 RBX: ffff88801b8ec158 RCX: ffffffff8141f51d
RDX: ffff888009601b80 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff88801af49800
FS:  0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555736eac58 CR3: 000000001f166000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 queue_work_on+0xd0/0xe0
 ext4_put_io_end_defer+0x35e/0x410
 ext4_end_bio+0x134/0x580
 bio_endio+0x5ad/0x6b0
 blk_update_request+0x2c5/0x1060
 blk_mq_end_request+0x5d/0x570
 lo_complete_rq+0x1d6/0x2a0
 blk_complete_reqs+0xb2/0xf0
 handle_softirqs+0x1b1/0x770
 run_ksoftirqd+0x2e/0x60
 smpboot_thread_fn+0x41d/0x9d0
 kthread+0x3c8/0x740
 ret_from_fork+0x34b/0x430
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x202/0x1240
Code: 48 8b 6d 00 e8 4f ee 79 03 31 ff 41 89 c5 89 c6 e8 c3 02 32 00 45 85 ed 0f 85 e1 05 00 00 e8 85 07 32 00 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 a0 0e 00 00 4c 8b 75 00 48 89 df 4c 89 34 24
RSP: 0018:ffff888009617b30 EFLAGS: 00010056
RAX: 0000000000000000 RBX: ffff88801b8ec158 RCX: ffffffff8141f51d
RDX: ffff888009601b80 RSI: ffffffff8141ef2b RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff0f128f4
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff88801af49800
FS:  0000000000000000(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555736eac58 CR3: 000000001f166000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
   4:	e8 4f ee 79 03       	callq  0x379ee58
   9:	31 ff                	xor    %edi,%edi
   b:	41 89 c5             	mov    %eax,%r13d
   e:	89 c6                	mov    %eax,%esi
  10:	e8 c3 02 32 00       	callq  0x3202d8
  15:	45 85 ed             	test   %r13d,%r13d
  18:	0f 85 e1 05 00 00    	jne    0x5ff
  1e:	e8 85 07 32 00       	callq  0x3207a8
  23:	48 89 e8             	mov    %rbp,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	0f 85 a0 0e 00 00    	jne    0xed5
  35:	4c 8b 75 00          	mov    0x0(%rbp),%r14
  39:	48 89 df             	mov    %rbx,%rdi
  3c:	4c 89 34 24          	mov    %r14,(%rsp)