------------[ cut here ]------------
WARNING: CPU: 1 PID: 20669 at block/blk-mq.c:1258 blk_mq_start_request+0x643/0x780 block/blk-mq.c:1258
Modules linked in:

CPU: 1 PID: 20669 Comm: syz-executor.5 Not tainted 6.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:blk_mq_start_request+0x643/0x780 block/blk-mq.c:1258
Code: 00 00 fc ff df 48 8d 7d 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2f 01 00 00 48 89 df ff 55 10 e9 64 fc ff ff e8 2d 14 40 fd <0f> 0b e9 f6 fa ff ff e8 21 14 40 fd 0f 0b e9 06 fa ff ff e8 15 14
RSP: 0018:ffffc90014fcf7a0 EFLAGS: 00010246

RAX: 0000000000040000 RBX: ffff88801e5eb480 RCX: ffffc90006121000
RDX: 0000000000040000 RSI: ffffffff844890b3 RDI: 0000000000000005
RBP: ffff88801e5eb514 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888141321150
R13: 0000000000000001 R14: ffff88801e5eb59d R15: ffff88801e5eb5a0
FS:  00007f76923026c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f240c175198 CR3: 0000000027f57000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 null_queue_rq+0x2e2/0x7a0 drivers/block/null_blk/main.c:1727
 __blk_mq_issue_directly+0xe3/0x270 block/blk-mq.c:2578
 blk_mq_request_issue_directly+0x120/0x190 block/blk-mq.c:2663
 blk_mq_plug_issue_direct+0x19e/0x670 block/blk-mq.c:2684
 blk_mq_flush_plug_list.part.0+0x16b6/0x1e90 block/blk-mq.c:2793
 blk_mq_flush_plug_list+0x62/0x80 block/blk-mq.c:2770
 __blk_flush_plug+0x2c0/0x430 block/blk-core.c:1142
 blk_finish_plug block/blk-core.c:1166 [inline]
 blk_finish_plug+0x54/0xa0 block/blk-core.c:1163
 do_writepages+0x300/0x690 mm/page-writeback.c:2560
 filemap_fdatawrite_wbc mm/filemap.c:387 [inline]
 filemap_fdatawrite_wbc+0x144/0x1b0 mm/filemap.c:377
 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:420
 generic_fadvise+0x58b/0x750 mm/fadvise.c:114
 vfs_fadvise mm/fadvise.c:185 [inline]
 ksys_fadvise64_64+0x102/0x130 mm/fadvise.c:199
 __x64_sys_fadvise64+0x96/0x100 mm/fadvise.c:212
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f769167cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f76923020c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd
RAX: ffffffffffffffda RBX: 00007f769179c050 RCX: 00007f769167cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f7692302120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000001
R13: 000000000000006e R14: 00007f769179c050 R15: 00007f76918bfa48
 </TASK>