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mailbox: mailbox-test: set tdev->signal to NULL after freeing

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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.

Fixes: d1c2f87c9a ("mailbox: mailbox-test: Prevent memory leak")
Signed-off-by: Sudeep Holla <[email protected]>
Acked-by: Lee Jones <[email protected]>
Signed-off-by: Jassi Brar <[email protected]>
This commit is contained in:
Sudeep Holla 2016-05-24 17:12:04 +01:00 • committed by Jassi Brar
commit 9ef3c51121
1 changed files with 1 additions and 0 deletions
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1
drivers/mailbox/mailbox-test.c
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@ -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;
}