general protection fault, probably for non-canonical address 0xdffffc0000000032: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]
CPU: 0 PID: 14698 Comm: kworker/u4:13 Not tainted 6.6.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Workqueue: loop2 loop_workfn
RIP: 0010:file_inode include/linux/fs.h:1073 [inline]
RIP: 0010:file_start_write include/linux/fs.h:2642 [inline]
RIP: 0010:lo_write_bvec drivers/block/loop.c:248 [inline]
RIP: 0010:lo_write_simple drivers/block/loop.c:271 [inline]
RIP: 0010:do_req_filebacked drivers/block/loop.c:495 [inline]
RIP: 0010:loop_handle_cmd drivers/block/loop.c:1915 [inline]
RIP: 0010:loop_process_work+0x1300/0x22a0 drivers/block/loop.c:1950
Code: 01 00 00 00 48 8d 94 24 40 02 00 00 e8 f9 ff c8 fe 4d 8d bc 24 90 01 00 00 4d 89 fd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 ff e8 20 a4 74 fc 4d 8b 37 4c 89 f0
RSP: 0018:ffffc90015067940 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000001000 RCX: ffff888065800000
RDX: ffff888065800000 RSI: 0000000000000001 RDI: ffffc90015067b28
RBP: ffffc90015067bf0 R08: ffffffff843d18de R09: 0000000000000000
R10: ffffc90015067b10 R11: fffff52002a0cf67 R12: 0000000000000000
R13: 0000000000000032 R14: ffffc90015067b10 R15: 0000000000000190
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f785177f000 CR3: 000000002eedf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 process_one_work kernel/workqueue.c:2630 [inline]
 process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703
 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784
 kthread+0x2d3/0x370 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:file_inode include/linux/fs.h:1073 [inline]
RIP: 0010:file_start_write include/linux/fs.h:2642 [inline]
RIP: 0010:lo_write_bvec drivers/block/loop.c:248 [inline]
RIP: 0010:lo_write_simple drivers/block/loop.c:271 [inline]
RIP: 0010:do_req_filebacked drivers/block/loop.c:495 [inline]
RIP: 0010:loop_handle_cmd drivers/block/loop.c:1915 [inline]
RIP: 0010:loop_process_work+0x1300/0x22a0 drivers/block/loop.c:1950
Code: 01 00 00 00 48 8d 94 24 40 02 00 00 e8 f9 ff c8 fe 4d 8d bc 24 90 01 00 00 4d 89 fd 49 c1 ed 03 48 b8 00 00 00 00 00 fc ff df <41> 80 7c 05 00 00 74 08 4c 89 ff e8 20 a4 74 fc 4d 8b 37 4c 89 f0
RSP: 0018:ffffc90015067940 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000001000 RCX: ffff888065800000
RDX: ffff888065800000 RSI: 0000000000000001 RDI: ffffc90015067b28
RBP: ffffc90015067bf0 R08: ffffffff843d18de R09: 0000000000000000
R10: ffffc90015067b10 R11: fffff52002a0cf67 R12: 0000000000000000
R13: 0000000000000032 R14: ffffc90015067b10 R15: 0000000000000190
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff0bd698000 CR3: 000000002ee1f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	01 00                	add    %eax,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	48 8d 94 24 40 02 00 	lea    0x240(%rsp),%rdx
   b:	00
   c:	e8 f9 ff c8 fe       	call   0xfec9000a
  11:	4d 8d bc 24 90 01 00 	lea    0x190(%r12),%r15
  18:	00
  19:	4d 89 fd             	mov    %r15,%r13
  1c:	49 c1 ed 03          	shr    $0x3,%r13
  20:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  27:	fc ff df
* 2a:	41 80 7c 05 00 00    	cmpb   $0x0,0x0(%r13,%rax,1) <-- trapping instruction
  30:	74 08                	je     0x3a
  32:	4c 89 ff             	mov    %r15,%rdi
  35:	e8 20 a4 74 fc       	call   0xfc74a45a
  3a:	4d 8b 37             	mov    (%r15),%r14
  3d:	4c 89 f0             	mov    %r14,%rax