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| author | Florian Westphal <fw@strlen.de> | 2013-12-23 00:32:31 +0100 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2014-02-15 19:20:09 +0000 |
| commit | 5299412590050caf9b8192a5914a54be792ff7ee (patch) | |
| tree | ff67c90e1693693e338ab578ca89d821d5e40760 /net | |
| parent | 95ae36775c086d7549bc65281d22a54b4788f933 (diff) | |
| download | linux-stable-5299412590050caf9b8192a5914a54be792ff7ee.tar.gz linux-stable-5299412590050caf9b8192a5914a54be792ff7ee.tar.bz2 linux-stable-5299412590050caf9b8192a5914a54be792ff7ee.zip | |
net: rose: restore old recvmsg behavior
[ Upstream commit f81152e35001e91997ec74a7b4e040e6ab0acccf ]
recvmsg handler in net/rose/af_rose.c performs size-check ->msg_namelen.
After commit f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
(net: rework recvmsg handler msg_name and msg_namelen logic), we now
always take the else branch due to namelen being initialized to 0.
Digging in netdev-vger-cvs git repo shows that msg_namelen was
initialized with a fixed-size since at least 1995, so the else branch
was never taken.
Compile tested only.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net')
| -rw-r--r-- | net/rose/af_rose.c | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index bf76dec76e00..686fb1ab2a08 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -1258,6 +1258,7 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, if (msg->msg_name) { struct sockaddr_rose *srose; + struct full_sockaddr_rose *full_srose = msg->msg_name; memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); srose = msg->msg_name; @@ -1265,18 +1266,9 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, srose->srose_addr = rose->dest_addr; srose->srose_call = rose->dest_call; srose->srose_ndigis = rose->dest_ndigis; - if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { - struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; - for (n = 0 ; n < rose->dest_ndigis ; n++) - full_srose->srose_digis[n] = rose->dest_digis[n]; - msg->msg_namelen = sizeof(struct full_sockaddr_rose); - } else { - if (rose->dest_ndigis >= 1) { - srose->srose_ndigis = 1; - srose->srose_digi = rose->dest_digis[0]; - } - msg->msg_namelen = sizeof(struct sockaddr_rose); - } + for (n = 0 ; n < rose->dest_ndigis ; n++) + full_srose->srose_digis[n] = rose->dest_digis[n]; + msg->msg_namelen = sizeof(struct full_sockaddr_rose); } skb_free_datagram(sk, skb); |