From d98985dd6c2dc69e2ad5f5482a5237fb9487ed99 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Tue, 13 Mar 2018 03:03:30 +0000 Subject: [PATCH] sctp: fix error return code in sctp_sendmsg_new_asoc() 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 Acked-by: Neil Horman Reviewed-by: Xin Long Acked-by: Neil Horman Signed-off-by: David S. Miller --- 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 7d3476a4860d..af5cf29b0c65 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; -- GitLab