WARNING: CPU: 1 PID: 21908 at block/blk-mq-sched.c:558 blk_mq_sched_free_requests+0x207/0x290 block/blk-mq-sched.c:558
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 21908 Comm: syz-executor.3 Not tainted 5.2.0-rc4+ #22
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+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x744 kernel/panic.c:219
 __warn.cold+0x20/0x4d kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:blk_mq_sched_free_requests+0x207/0x290 block/blk-mq-sched.c:558
Code: ff e8 0d c4 30 fe 31 ff 89 c3 89 c6 e8 02 ad 4a fe 85 db 0f 85 68 fe ff ff e8 75 ab 4a fe 0f 0b e9 5c fe ff ff e8 69 ab 4a fe <0f> 0b e9 7f fe ff ff 48 c7 c7 34 bc 80 89 e8 66 49 83 fe e9 28 fe
RSP: 0018:ffff8880372d7a60 EFLAGS: 00010216
RAX: 0000000000040000 RBX: 0000000000000001 RCX: ffffc9000c872000
RDX: 000000000001298f RSI: ffffffff8325fb67 RDI: ffff88803a6cb160
RBP: ffff8880372d7ab0 R08: ffff88805db0a640 R09: ffff88805db0af08
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4
R13: ffff88803a6cb148 R14: ffff88809e496f58 R15: ffff88803a6cb148
 blk_mq_init_sched+0x32c/0x770 block/blk-mq-sched.c:542
 elevator_init_mq+0xcd/0x160 block/elevator.c:622
 blk_mq_init_allocated_queue+0x10e2/0x15b0 block/blk-mq.c:2921
 blk_mq_init_queue+0x62/0xb0 block/blk-mq.c:2705
 loop_add+0x2dd/0x8d0 drivers/block/loop.c:2004
 loop_control_ioctl drivers/block/loop.c:2157 [inline]
 loop_control_ioctl+0x165/0x360 drivers/block/loop.c:2139
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:696
 ksys_ioctl+0xab/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4592c9
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3f6d7fdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004592c9
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000007
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3f6d7fe6d4
R13: 00000000004c2973 R14: 00000000004d59f0 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..