CVE-2022-49259

In the Linux kernel, the following vulnerability has been resolved:

block: don't delete queue kobject before its children

kobjects aren't supposed to be deleted before their child kobjects are deleted. Apparently this is usually benign; however, a WARN will be triggered if one of the child kobjects has a named attribute group:

sysfs group 'modes' not found for kobject 'crypto'
WARNING: CPU: 0 PID: 1 at fs/sysfs/group.c:278 sysfs_remove_group+0x72/0x80
...
Call Trace:
  sysfs_remove_groups+0x29/0x40 fs/sysfs/group.c:312
  __kobject_del+0x20/0x80 lib/kobject.c:611
  kobject_cleanup+0xa4/0x140 lib/kobject.c:696
  kobject_release lib/kobject.c:736 [inline]
  kref_put include/linux/kref.h:65 [inline]
  kobject_put+0x53/0x70 lib/kobject.c:753
  blk_crypto_sysfs_unregister+0x10/0x20 block/blk-crypto-sysfs.c:159
  blk_unregister_queue+0xb0/0x110 block/blk-sysfs.c:962
  del_gendisk+0x117/0x250 block/genhd.c:610

Fix this by moving the kobject_del() and the corresponding kobject_uevent() to the correct place.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.