18026d8668
keyctl_restrict_keyring() allows through a NULL restriction when the
"type" is non-NULL, which causes a NULL pointer dereference in
asymmetric_lookup_restriction() when it calls strcmp() on the
restriction string.
But no key types actually use a "NULL restriction" to mean anything, so
update keyctl_restrict_keyring() to reject it with EINVAL.
Reported-by: syzbot <syzkaller@googlegroups.com>
Fixes:
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|---|---|---|
| .. | ||
| apparmor | ||
| integrity | ||
| keys | ||
| loadpin | ||
| selinux | ||
| smack | ||
| tomoyo | ||
| yama | ||
| Kconfig | ||
| Makefile | ||
| commoncap.c | ||
| device_cgroup.c | ||
| inode.c | ||
| lsm_audit.c | ||
| min_addr.c | ||
| security.c | ||