Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 194/261] ima: Set again build_ima_appraise variable | Date | Fri, 19 Jun 2020 16:33:25 +0200 |
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From: Krzysztof Struczynski <krzysztof.struczynski@huawei.com>
[ Upstream commit b59fda449cf07f2db3be3a67142e6c000f5e8d79 ]
After adding the new add_rule() function in commit c52657d93b05 ("ima: refactor ima_init_policy()"), all appraisal flags are added to the temp_ima_appraise variable. Revert to the previous behavior instead of removing build_ima_appraise, to benefit from the protection offered by __ro_after_init.
The mentioned commit introduced a bug, as it makes all the flags modifiable, while build_ima_appraise flags can be protected with __ro_after_init.
Cc: stable@vger.kernel.org # 5.0.x Fixes: c52657d93b05 ("ima: refactor ima_init_policy()") Co-developed-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com> Signed-off-by: Krzysztof Struczynski <krzysztof.struczynski@huawei.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org> --- security/integrity/ima/ima_policy.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 86624b1331ef..558a7607bf93 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -590,8 +590,14 @@ static void add_rules(struct ima_rule_entry *entries, int count, list_add_tail(&entry->list, &ima_policy_rules); } - if (entries[i].action == APPRAISE) - temp_ima_appraise |= ima_appraise_flag(entries[i].func); + if (entries[i].action == APPRAISE) { + if (entries != build_appraise_rules) + temp_ima_appraise |= + ima_appraise_flag(entries[i].func); + else + build_ima_appraise |= + ima_appraise_flag(entries[i].func); + } } } -- 2.25.1
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