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WARNING: CPU: 1 PID: 18063 at ./include/linux/kref.h:46 kref_get include/linux/kref.h:46 [inline]
WARNING: CPU: 1 PID: 18063 at ./include/linux/kref.h:46 kobject_get lib/kobject.c:596 [inline]
WARNING: CPU: 1 PID: 18063 at ./include/linux/kref.h:46 kobject_get+0xd9/0xf0 lib/kobject.c:589
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 18063 Comm: blkid Not tainted 4.9.148+ #1
 ffff8801c8e5f618 ffffffff81b44d01 0000000000000000 ffffffff82a39be0
 00000000ffffffff 0000000000000001 0000000000000009 ffff8801c8e5f6f8
 ffffffff813f727a 0000000041b58ab3 ffffffff82e354ca ffffffff813f70a1
Call Trace:
 [<ffffffff81b44d01>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b44d01>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<ffffffff813f727a>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<ffffffff813f74bb>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<ffffffff810dae9d>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<ffffffff81b4b1a9>] kref_get include/linux/kref.h:46 [inline]
 [<ffffffff81b4b1a9>] kobject_get lib/kobject.c:596 [inline]
 [<ffffffff81b4b1a9>] kobject_get+0xd9/0xf0 lib/kobject.c:589
 [<ffffffff81b1423c>] get_disk+0x8c/0xe0 block/genhd.c:1344
 [<ffffffff81b148d1>] get_gendisk block/genhd.c:724 [inline]
 [<ffffffff81b148d1>] get_gendisk+0x171/0x2d0 block/genhd.c:709
 [<ffffffff815cb076>] __blkdev_get+0x356/0xd60 fs/block_dev.c:1262
 [<ffffffff815cdc58>] blkdev_get+0x2e8/0x920 fs/block_dev.c:1416
 [<ffffffff815ce4ba>] blkdev_open+0x1aa/0x250 fs/block_dev.c:1571
 [<ffffffff815035af>] do_dentry_open+0x3ef/0xc80 fs/open.c:766
 [<ffffffff81506f45>] vfs_open+0x105/0x230 fs/open.c:879
 [<ffffffff8153e305>] do_last fs/namei.c:3457 [inline]
 [<ffffffff8153e305>] path_openat+0xbf5/0x2f60 fs/namei.c:3581
 [<ffffffff81543451>] do_filp_open+0x1a1/0x280 fs/namei.c:3615
 [<ffffffff81507970>] do_sys_open+0x2f0/0x610 fs/open.c:1072
 [<ffffffff81507cbd>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff81507cbd>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056bd>] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285
 [<ffffffff82812993>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..