diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2019-04-12 13:53:10 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-12 20:25:03 +0300 |
| commit | 175f7c1f01d30b2088491bee4636fbf846fb76ce (patch) | |
| tree | f3e3d60992e26ca033d285e6d287abd5a29ef4c1 /net/sctp | |
| parent | 238ffdc49ef98b15819cfd5e3fb23194e3ea3d39 (diff) | |
| download | linux-175f7c1f01d30b2088491bee4636fbf846fb76ce.tar.xz | |
sctp: Check address length before reading address family
KMSAN will complain if valid address length passed to connect() is shorter
than sizeof("struct sockaddr"->sa_family) bytes.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp')
| -rw-r--r-- | net/sctp/socket.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 9874e60c9b0d..4583fa914e62 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -4847,7 +4847,8 @@ static int sctp_connect(struct sock *sk, struct sockaddr *addr, } /* Validate addr_len before calling common connect/connectx routine. */ - af = sctp_get_af_specific(addr->sa_family); + af = addr_len < offsetofend(struct sockaddr, sa_family) ? NULL : + sctp_get_af_specific(addr->sa_family); if (!af || addr_len < af->sockaddr_len) { err = -EINVAL; } else { |