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mISDN: Check address length before reading address family

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[ Upstream commit 238ffdc49e ]

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 dc068b0a2b
commit 04e65596e1
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; struct sock *sk = sock->sk;
int err = 0; int err = 0;
if (!maddr || maddr->family != AF_ISDN) if (addr_len < sizeof(struct sockaddr_mISDN))
return -EINVAL; return -EINVAL;
if (addr_len < sizeof(struct sockaddr_mISDN)) if (!maddr || maddr->family != AF_ISDN)
return -EINVAL; return -EINVAL;
lock_sock(sk); lock_sock(sk);