diff options
| author | Marcel Holtmann <marcel@holtmann.org> | 2007-01-08 02:16:31 +0100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-01-09 00:29:55 -0800 |
| commit | 4d6a2188bd456969f52c03edf1988de90f08d9f5 (patch) | |
| tree | ccbae1cf287db409d62c4178d417337ed4b409d1 /net | |
| parent | b6e557fbf1dbba8cfa667a25503e5dbd0e9330b7 (diff) | |
| download | lwn-4d6a2188bd456969f52c03edf1988de90f08d9f5.tar.gz lwn-4d6a2188bd456969f52c03edf1988de90f08d9f5.zip | |
[Bluetooth] Fix uninitialized return value for RFCOMM sendmsg()
When calling send() with a zero length parameter on a RFCOMM socket
it returns a positive value. In this rare case the variable err is
used uninitialized and unfortunately its value is returned.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/rfcomm/sock.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c index 544d65b7baa7..cb7e855f0828 100644 --- a/net/bluetooth/rfcomm/sock.c +++ b/net/bluetooth/rfcomm/sock.c @@ -557,7 +557,6 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct sock *sk = sock->sk; struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; struct sk_buff *skb; - int err; int sent = 0; if (msg->msg_flags & MSG_OOB) @@ -572,6 +571,7 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, while (len) { size_t size = min_t(size_t, len, d->mtu); + int err; skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE, msg->msg_flags & MSG_DONTWAIT, &err); @@ -582,13 +582,16 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size); if (err) { kfree_skb(skb); - sent = err; + if (sent == 0) + sent = err; break; } err = rfcomm_dlc_send(d, skb); if (err < 0) { kfree_skb(skb); + if (sent == 0) + sent = err; break; } @@ -598,7 +601,7 @@ static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, release_sock(sk); - return sent ? sent : err; + return sent; } static long rfcomm_sock_data_wait(struct sock *sk, long timeo) |