Messages in this thread Patch in this message | | | From | Lakshmi Ramasubramanian <> | Subject | [PATCH v9 1/6] IMA: Check IMA policy flag | Date | Tue, 26 Nov 2019 17:56:49 -0800 |
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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@linux.microsoft.com> --- 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
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