tdev->signal is not set NULL after it's freed. This will cause random exceptions when the stale pointer is accessed after tdev->signal is freed. Also, since tdev->signal allocation is skipped the next time it's written, this leads to continuous fault finally leading to the total death of the system.
Cc: Lee Jones <[email protected]> Cc: Jassi Brar <[email protected]> Fixes: d1c2f87c9a8f ("mailbox: mailbox-test: Prevent memory leak") Signed-off-by: Sudeep Holla <[email protected]> --- drivers/mailbox/mailbox-test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c index 58d04726cdd7..9ca96e9db6bf 100644 --- a/drivers/mailbox/mailbox-test.c +++ b/drivers/mailbox/mailbox-test.c @@ -133,6 +133,7 @@ static ssize_t mbox_test_message_write(struct file *filp, out: kfree(tdev->signal); kfree(tdev->message); + tdev->signal = NULL; return ret < 0 ? ret : count; } -- 1.9.1
