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WARNING: CPU: 1 PID: 8202 at kernel/kthread.c:817 queuing_blocked kernel/kthread.c:817 [inline]
WARNING: CPU: 1 PID: 8202 at kernel/kthread.c:817 kthread_queue_work+0x8a/0xa0 kernel/kthread.c:864
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 8202 Comm: systemd-udevd Not tainted 5.8.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xb3/0xec lib/dump_stack.c:118
 panic+0x115/0x2fa kernel/panic.c:231
 __warn.cold.13+0x20/0x25 kernel/panic.c:600
 report_bug+0xc0/0xf0 lib/bug.c:198
 handle_bug+0x35/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x60 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:542
RIP: 0010:queuing_blocked kernel/kthread.c:817 [inline]
RIP: 0010:kthread_queue_work+0x8a/0xa0 kernel/kthread.c:864
Code: 89 df e8 c9 f7 ff ff 41 bd 01 00 00 00 eb cb 48 8d 7b 20 be ff ff ff ff e8 b3 87 e0 01 85 c0 75 a6 0f 0b 48 83 7b 68 00 75 a4 <0f> 0b 45 31 ed eb a9 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc90002cd7998 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff888219fff158 RCX: 0000000000000001
RDX: ffff8881105ba100 RSI: ffff888219fff178 RDI: 0000000000000082
RBP: ffff8881291ce128 R08: 000000000007b760 R09: 0000000000000001
R10: 00000000ffffffff R11: 456f7c38c93683af R12: ffff888219fff160
R13: 0000000000000000 R14: 0000000000000282 R15: ffff88812a1c4380
 loop_queue_rq+0x15d/0x1a0 drivers/block/loop.c:2026
 blk_mq_dispatch_rq_list+0xc6/0x6b0 block/blk-mq.c:1277
 blk_mq_do_dispatch_sched+0x10c/0x150 block/blk-mq-sched.c:134
 __blk_mq_sched_dispatch_requests+0xf7/0x150 block/blk-mq-sched.c:250
 blk_mq_sched_dispatch_requests+0x2b/0x50 block/blk-mq-sched.c:276
 __blk_mq_run_hw_queue+0x68/0x110 block/blk-mq.c:1418
 __blk_mq_delay_run_hw_queue+0x1a7/0x1e0 block/blk-mq.c:1495
 blk_mq_run_hw_queue+0x81/0xd0 block/blk-mq.c:1548
 blk_mq_sched_insert_requests+0xea/0x2b0 block/blk-mq-sched.c:530
 blk_mq_flush_plug_list+0x14c/0x2c0 block/blk-mq.c:1817
 blk_flush_plug_list+0xcc/0xf0 block/blk-core.c:1859
 blk_finish_plug+0x1c/0x29 block/blk-core.c:1876
 read_pages+0x17b/0x3f0 mm/readahead.c:150
 page_cache_readahead_unbounded+0x159/0x280 mm/readahead.c:244
 generic_file_buffered_read+0x45d/0x6c0 mm/filemap.c:2033
 call_read_iter include/linux/fs.h:1901 [inline]
 new_sync_read+0x10c/0x190 fs/read_write.c:415
 vfs_read+0x9a/0x180 fs/read_write.c:462
 ksys_read+0x5a/0xd0 fs/read_write.c:588
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f0cef070210
Code: Bad RIP value.
RSP: 002b:00007ffc7d127728 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055fd45bdf520 RCX: 00007f0cef070210
RDX: 0000000000000400 RSI: 000055fd45bdf548 RDI: 000000000000000f
RBP: 000055fd45bf3c80 R08: 00007f0cef05af88 R09: 0000000000000430
R10: 000000000000006d R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000400 R14: 000055fd45bf3cd0 R15: 0000000000000400
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..