ima: clear IMA_HASH

The IMA_APPRAISE and IMA_HASH policies overlap. Clear IMA_HASH properly.

Fixes: da1b0029f5 ("ima: support new "hash" and "dont_hash" policy actions")
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>

security/integrity/ima/ima_policy.c

@@ -389,7 +389,7 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid,
 		action |= entry->action & IMA_DO_MASK;
 		if (entry->action & IMA_APPRAISE) {
 			action |= get_subaction(entry, func);
-			action ^= IMA_HASH;
+			action &= ~IMA_HASH;
 		}
 
 		if (entry->action & IMA_DO_MASK)