From: Mimi Zohar Date: Fri, 19 Jul 2019 11:16:57 +0000 (-0400) Subject: ima: initialize the "template" field with the default template X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b36f281f4a314de4be0a51d6511b794691f8a244;p=linux.git ima: initialize the "template" field with the default template IMA policy rules are walked sequentially. Depending on the ordering of the policy rules, the "template" field might be defined in one rule, but will be replaced by subsequent, applicable rules, even if the rule does not explicitly define the "template" field. This patch initializes the "template" once and only replaces the "template", when explicitly defined. Fixes: 19453ce0bcfb ("IMA: support for per policy rule template formats") Signed-off-by: Mimi Zohar --- diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 6df7f641ff666..36a0727f1d7af 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -491,6 +491,9 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, struct ima_rule_entry *entry; int action = 0, actmask = flags | (flags << 1); + if (template_desc) + *template_desc = ima_template_desc_current(); + rcu_read_lock(); list_for_each_entry_rcu(entry, ima_rules, list) { @@ -510,6 +513,7 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, action |= IMA_FAIL_UNVERIFIABLE_SIGS; } + if (entry->action & IMA_DO_MASK) actmask &= ~(entry->action | entry->action << 1); else @@ -520,8 +524,6 @@ int ima_match_policy(struct inode *inode, const struct cred *cred, u32 secid, if (template_desc && entry->template) *template_desc = entry->template; - else if (template_desc) - *template_desc = ima_template_desc_current(); if (!actmask) break;