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authorLakshmi Ramasubramanian <nramas@linux.microsoft.com>2019-12-11 08:47:02 -0800
committerMimi Zohar <zohar@linux.ibm.com>2019-12-12 08:53:50 -0500
commitc5563bad88e07017e08cce1142903e501598c80c (patch)
tree61b6b5e8886362274b1b97e46e3be309762bacb9 /security/integrity
parentima: avoid appraise error for hash calc interrupt (diff)
downloadlinux-dev-c5563bad88e07017e08cce1142903e501598c80c.tar.xz
linux-dev-c5563bad88e07017e08cce1142903e501598c80c.zip
IMA: Check IMA policy flag
process_buffer_measurement() may be called prior to IMA being initialized (for instance, when the IMA hook is called when a key is added to the .builtin_trusted_keys keyring), which would result in a kernel panic. This patch adds the check in process_buffer_measurement() to return immediately if IMA is not initialized yet. Signed-off-by: Lakshmi Ramasubramanian <nramas@linux.microsoft.com> Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima_main.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c
index d7e987baf127..9b35db2fc777 100644
--- a/security/integrity/ima/ima_main.c
+++ b/security/integrity/ima/ima_main.c
@@ -655,6 +655,9 @@ void process_buffer_measurement(const void *buf, int size,
int action = 0;
u32 secid;
+ if (!ima_policy_flag)
+ return;
+
/*
* Both LSM hooks and auxilary based buffer measurements are
* based on policy. To avoid code duplication, differentiate