Commit f81152e3 authored by Florian Westphal's avatar Florian Westphal Committed by David S. Miller

net: rose: restore old recvmsg behavior

recvmsg handler in net/rose/af_rose.c performs size-check ->msg_namelen.

After commit f3d33426
(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: default avatarFlorian Westphal <fw@strlen.de>
Acked-by: default avatarHannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ac3d5ac2
...@@ -1253,6 +1253,7 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, ...@@ -1253,6 +1253,7 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
if (msg->msg_name) { if (msg->msg_name) {
struct sockaddr_rose *srose; struct sockaddr_rose *srose;
struct full_sockaddr_rose *full_srose = msg->msg_name;
memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose)); memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
srose = msg->msg_name; srose = msg->msg_name;
...@@ -1260,18 +1261,9 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock, ...@@ -1260,18 +1261,9 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
srose->srose_addr = rose->dest_addr; srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call; srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis; srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) { for (n = 0 ; n < rose->dest_ndigis ; n++)
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name; full_srose->srose_digis[n] = rose->dest_digis[n];
for (n = 0 ; n < rose->dest_ndigis ; n++) msg->msg_namelen = sizeof(struct full_sockaddr_rose);
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);
}
} }
skb_free_datagram(sk, skb); skb_free_datagram(sk, skb);
......
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