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mISDN: Check address length before reading address family

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[ Upstream commit 238ffdc49ef98b15819cfd5e3fb23194e3ea3d39 ]

KMSAN will complain if valid address length passed to bind() is shorter
than sizeof("struct sockaddr_mISDN"->family) bytes.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tetsuo Handa 2019-04-12 19:52:36 +09:00 committed by Greg Kroah-Hartman
parent 00853c94af
commit 6f8288c2da
1 changed files with 2 additions and 2 deletions
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4
drivers/isdn/mISDN/socket.c
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@ -712,10 +712,10 @@ base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
struct sock *sk = sock->sk;
int err = 0;
if (!maddr || maddr->family != AF_ISDN)
if (addr_len < sizeof(struct sockaddr_mISDN))
return -EINVAL;
if (addr_len < sizeof(struct sockaddr_mISDN))
if (!maddr || maddr->family != AF_ISDN)
return -EINVAL;
lock_sock(sk);