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Subject[mISDN PATCH v2 12/19] Fix skb leak in error cases
From
Date
If the channel receive function returns an error the skb must be freed.

Signed-off-by: Karsten Keil <keil@b1-systems.de>
---
drivers/isdn/mISDN/socket.c | 22 ++++++++++++----------
1 files changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index 530f689..2a2c30a 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -209,7 +209,7 @@ mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,

if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
err = -EFAULT;
- goto drop;
+ goto done;
}

memcpy(mISDN_HEAD_P(skb), skb->data, MISDN_HEADER_LEN);
@@ -230,19 +230,21 @@ mISDN_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
__func__, mISDN_HEAD_ID(skb));

err = -ENODEV;
- if (!_pms(sk)->ch.peer ||
- (err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb)))
- goto drop;
-
- err = len;
+ if (!_pms(sk)->ch.peer)
+ goto done;
+ err = _pms(sk)->ch.recv(_pms(sk)->ch.peer, skb);
+ if (err)
+ goto done;
+ else {
+ skb = NULL;
+ err = len;
+ }

done:
+ if (skb)
+ kfree_skb(skb);
release_sock(sk);
return err;
-
-drop:
- kfree_skb(skb);
- goto done;
}

static int
--
1.6.0.2


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