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-rw-r--r--drivers/mailbox/mailbox-test.c1
1 files changed, 1 insertions, 0 deletions
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;
}