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net: qrtr: potential use after free in qrtr_sendmsg()

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If skb_pad() fails then it frees the skb so we should check for errors.

Fixes: bdabad3e363d ("net: Add Qualcomm IPC router")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2017-04-20 13:21:30 +03:00 committed by David S. Miller
parent 89087c456f
commit 6f60f43810
1 changed files with 3 additions and 1 deletions
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4
net/qrtr/qrtr.c
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@ -658,7 +658,9 @@ static int qrtr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
} }
if (plen != len) { if (plen != len) {
skb_pad(skb, plen - len); rc = skb_pad(skb, plen - len);
if (rc)
goto out_node;
skb_put(skb, plen - len); skb_put(skb, plen - len);
} }