Integrity: Pass commname via get_task_comm()
When we pass task->comm to audit_log_untrustedstring(), we need to pass it
via get_task_comm() because task->comm can be changed to contain untrusted
string by other threads after audit_log_untrustedstring() confirmed that
task->comm does not contain untrusted string.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
diff --git a/security/integrity/integrity_audit.c b/security/integrity/integrity_audit.c
index 809ec842..4b996ba 100644
--- a/security/integrity/integrity_audit.c
+++ b/security/integrity/integrity_audit.c
@@ -33,6 +33,7 @@
const char *cause, int result, int audit_info)
{
struct audit_buffer *ab;
+ char name[TASK_COMM_LEN];
if (!integrity_audit_info && audit_info == 1) /* Skip info messages */
return;
@@ -49,7 +50,7 @@
audit_log_format(ab, " cause=");
audit_log_string(ab, cause);
audit_log_format(ab, " comm=");
- audit_log_untrustedstring(ab, current->comm);
+ audit_log_untrustedstring(ab, get_task_comm(name, current));
if (fname) {
audit_log_format(ab, " name=");
audit_log_untrustedstring(ab, fname);