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authorMimi Zohar <zohar@linux.ibm.com>2020-06-10 09:18:26 -0400
committerMimi Zohar <zohar@linux.ibm.com>2020-06-12 11:30:18 -0400
commit4235b1a4efe19dd0309250170bbf0aa95e559626 (patch)
tree45de78666d03314849cb1ebcd8cc6413705bbfd2
parent42413b49804b250ced70dac8815388af2d4ad872 (diff)
ima: fix mprotect checking
Make sure IMA is enabled before checking mprotect change. Addresses report of a 3.7% regression of boot-time.dhcp. Fixes: 8eb613c0b8f1 ("ima: verify mprotect change is consistent with mmap policy") Reported-by: kernel test robot <rong.a.chen@intel.com> Reviewed-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com> Tested-by: Xing Zhengjun <zhengjun.xing@linux.intel.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
-rw-r--r--security/integrity/ima/ima_main.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index 800fb3bba418..c1583d98c5e5 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -419,7 +419,8 @@ int ima_file_mprotect(struct vm_area_struct *vma, unsigned long prot)
int pcr;
/* Is mprotect making an mmap'ed file executable? */
- if (!vma->vm_file || !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC))
+ if (!(ima_policy_flag & IMA_APPRAISE) || !vma->vm_file ||
+ !(prot & PROT_EXEC) || (vma->vm_flags & VM_EXEC))
return 0;
security_task_getsecid(current, &secid);