Return immediately from process_buffer_measurement() if the IMA policy flag is set to zero. Not doing this can result in kernel panic when process_buffer_measurement() is called before IMA is initialized (for instance, when the IMA hook is called when a key is added to the .builtin_trusted_keys keyring). This change adds the check in process_buffer_measurement() to return immediately if ima_policy_flag is set to zero. Signed-off-by: Lakshmi Ramasubramanian <nramas@xxxxxxxxxxxxxxxxxxx> --- security/integrity/ima/ima_main.c | 3 +++ 1 file changed, 3 insertions(+) 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 -- 2.17.1
