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Integrity: Pass commname via get_task_comm()

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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>
This commit is contained in:
Tetsuo Handa 2013-12-24 20:49:01 +09:00 committed by Mimi Zohar
parent d984ea6049
commit 73a6b44a00
1 changed files with 2 additions and 1 deletions
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security/integrity/integrity_audit.c
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@ -33,6 +33,7 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
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 @@ void integrity_audit_msg(int audit_msgno, struct inode *inode,
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);