general protection fault: 0000 [#1] PREEMPT SMP KASAN NOPTI
Modules linked in:
CPU: 0 PID: 19644 Comm: blkid Not tainted 4.14.131+ #13
task: 000000003abe0835 task.stack: 00000000ccdd4498
RIP: 0010:kobject_uevent_env+0xa3/0xc60 lib/kobject_uevent.c:355
RSP: 0018:ffff8881bba4fc08 EFLAGS: 00010206
RAX: 0000000000000018 RBX: 0000000000000002 RCX: 1ffff1103aced6e4
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000000000c0
RBP: ffff8881da1d58d0 R08: 0000000000000001 R09: 0000000000000003
R10: ffff8881d676b7a8 R11: 0000000000000001 R12: 00000000000000a0
R13: dffffc0000000000 R14: ffff8881da1d57c8 R15: 00000000000000a0
FS:  00007f38c156e740(0000) GS:ffff8881dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002030 CR3: 00000001c4472004 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 loop_clr_fd+0x49e/0xac0 drivers/block/loop.c:1059
 __lo_release drivers/block/loop.c:1649 [inline]
 lo_release+0xff/0x190 drivers/block/loop.c:1667
 __blkdev_put+0x518/0x6d0 fs/block_dev.c:1791
 blkdev_close+0x86/0xb0 fs/block_dev.c:1863
 __fput+0x25e/0x700 fs/file_table.c:210
 task_work_run+0x118/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x13b/0x160 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x392/0x510 arch/x86/entry/common.c:297
Code: 03 42 80 3c 28 00 0f 85 44 0a 00 00 4d 8b 64 24 18 4d 85 e4 0f 84 22 02 00 00 e8 39 0f af fe 49 8d 7c 24 20 48 89 f8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 10 0a 00 00 49 8b 6c 24 20 48 85 ed 74 b0 
RIP: kobject_uevent_env+0xa3/0xc60 lib/kobject_uevent.c:355 RSP: ffff8881bba4fc08
---[ end trace a955d30cc8e95ab5 ]---