Return error code -EINVAL in the address len check error handling
case since 'err' can be overwrite to 0 by 'err = sctp_verify_addr()'
in the for loop.
Fixes: 2c0dbaa0c43d ("sctp: add support for SCTP_DSTADDRV4/6 Information for sendmsg")
Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
Acked-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
---
v1 -> v2: remove the 'err' initialization
---
net/sctp/socket.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 7d3476a..af5cf29 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -1677,7 +1677,7 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
struct sctp_association *asoc;
enum sctp_scope scope;
struct cmsghdr *cmsg;
- int err = -EINVAL;
+ int err;
*tp = NULL;
@@ -1761,16 +1761,20 @@ static int sctp_sendmsg_new_asoc(struct sock *sk, __u16 sflags,
memset(daddr, 0, sizeof(*daddr));
dlen = cmsg->cmsg_len - sizeof(struct cmsghdr);
if (cmsg->cmsg_type == SCTP_DSTADDRV4) {
- if (dlen < sizeof(struct in_addr))
+ if (dlen < sizeof(struct in_addr)) {
+ err = -EINVAL;
goto free;
+ }
dlen = sizeof(struct in_addr);
daddr->v4.sin_family = AF_INET;
daddr->v4.sin_port = htons(asoc->peer.port);
memcpy(&daddr->v4.sin_addr, CMSG_DATA(cmsg), dlen);
} else {
- if (dlen < sizeof(struct in6_addr))
+ if (dlen < sizeof(struct in6_addr)) {
+ err = -EINVAL;
goto free;
+ }
dlen = sizeof(struct in6_addr);
daddr->v6.sin6_family = AF_INET6;
--
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