WARNING: CPU: 1 PID: 9446 at fs/block_dev.c:1899 __blkdev_put+0x1ba/0x6a0 fs/block_dev.c:1899
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 9446 Comm: blkid Not tainted 5.3.0-rc2+ #61
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+0x1d8/0x2f8 lib/dump_stack.c:113
 panic+0x29b/0x7d9 kernel/panic.c:219
 __warn+0x22f/0x230 kernel/panic.c:576
 report_bug+0x190/0x290 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026
RIP: 0010:__blkdev_put+0x1ba/0x6a0 fs/block_dev.c:1899
Code: 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 85 e2 e6 ff 48 8b 3b e8 fd 51 ca ff eb 11 e8 e6 37 ac ff <0f> 0b 4d 85 e4 75 ad e8 da 37 ac ff 4d 8d 74 24 08 4d 89 f7 49 c1
RSP: 0018:ffff88808a507bc0 EFLAGS: 00010293
RAX: ffffffff81cba95a RBX: 0000000000000002 RCX: ffff88809ae96240
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff88808a507cd8 R08: ffffffff81cba900 R09: ffffed1014cee6e4
R10: ffffed1014cee6e4 R11: 0000000000000000 R12: ffff8880a6773700
R13: dffffc0000000000 R14: ffff8880a67737e0 R15: 00000000080a101d
 blkdev_put+0x2c8/0x3b0 fs/block_dev.c:1969
 blkdev_close+0x7b/0xa0 fs/block_dev.c:1976
 __fput+0x2e4/0x740 fs/file_table.c:280
 ____fput+0x15/0x20 fs/file_table.c:313
 task_work_run+0x17e/0x1b0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:163 [inline]
 prepare_exit_to_usermode+0x459/0x580 arch/x86/entry/common.c:194
 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:274
 do_syscall_64+0x126/0x140 arch/x86/entry/common.c:299
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f854193f2b0
Code: 40 75 0b 31 c0 48 83 c4 08 e9 0c ff ff ff 48 8d 3d c5 32 08 00 e8 c0 07 02 00 83 3d 45 a3 2b 00 00 75 10 b8 03 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 ce 8a 01 00 48 89 04 24
RSP: 002b:00007ffca9fbe3c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f854193f2b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000a56030
R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000005
Kernel Offset: disabled
Rebooting in 86400 seconds..