diff options
| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2019-04-12 19:51:52 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-02 10:02:51 +0200 |
| commit | 4f2c074416346c2c1241ce573772f1354619cda7 (patch) | |
| tree | 4b76e199d6702b419fced61d682417001f7d00ea /net | |
| parent | d0d184559cb42063a6fe960f0a9376d2aaabd8e6 (diff) | |
| download | linux-4f2c074416346c2c1241ce573772f1354619cda7.tar.gz linux-4f2c074416346c2c1241ce573772f1354619cda7.tar.bz2 linux-4f2c074416346c2c1241ce573772f1354619cda7.zip | |
net/rds: Check address length before reading address family
commit dd3ac9a684358b8c1d5c432ca8322aaf5e4f28ee upstream.
syzbot is reporting uninitialized value at rds_connect() [1] and
rds_bind() [2]. This is because syzbot is passing ulen == 0 whereas
these functions expect that it is safe to access sockaddr->family field
in order to determine minimal address length for validation.
[1] https://syzkaller.appspot.com/bug?id=f4e61c010416c1e6f0fa3ffe247561b60a50ad71
[2] https://syzkaller.appspot.com/bug?id=a4bf9e41b7e055c3823fdcd83e8c58ca7270e38f
Reported-by: syzbot <syzbot+0049bebbf3042dbd2e8f@syzkaller.appspotmail.com>
Reported-by: syzbot <syzbot+915c9f99f3dbc4bd6cd1@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/rds/af_rds.c | 3 | ||||
| -rw-r--r-- | net/rds/bind.c | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c index 65387e1e6964..cd7e01ea8144 100644 --- a/net/rds/af_rds.c +++ b/net/rds/af_rds.c @@ -506,6 +506,9 @@ static int rds_connect(struct socket *sock, struct sockaddr *uaddr, struct rds_sock *rs = rds_sk_to_rs(sk); int ret = 0; + if (addr_len < offsetofend(struct sockaddr, sa_family)) + return -EINVAL; + lock_sock(sk); switch (uaddr->sa_family) { diff --git a/net/rds/bind.c b/net/rds/bind.c index 17c9d9f0c848..0f4398e7f2a7 100644 --- a/net/rds/bind.c +++ b/net/rds/bind.c @@ -173,6 +173,8 @@ int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) /* We allow an RDS socket to be bound to either IPv4 or IPv6 * address. */ + if (addr_len < offsetofend(struct sockaddr, sa_family)) + return -EINVAL; if (uaddr->sa_family == AF_INET) { struct sockaddr_in *sin = (struct sockaddr_in *)uaddr; |