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rxrpc: Check address length before reading srx_service field 

KMSAN will complain if valid address length passed to bind() is shorter
than sizeof(struct sockaddr_rxrpc) bytes.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tetsuo Handa 2019-04-12 19:54:05 +09:00 committed by David S. Miller
parent d852be8477
commit a9107a14a9
1 changed files with 2 additions and 1 deletions
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3
net/rxrpc/af_rxrpc.c
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@ -135,7 +135,7 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
struct rxrpc_local *local;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
u16 service_id = srx->srx_service;
u16 service_id;
int ret;
_enter("%p,%p,%d", rx, saddr, len);
@ -143,6 +143,7 @@ static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
ret = rxrpc_validate_address(rx, srx, len);
if (ret < 0)
goto error;
service_id = srx->srx_service;
lock_sock(&rx->sk);