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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2019-04-12 19:55:14 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-12 10:25:03 -0700 |
| commit | c68e747d0a98f44a4e49071940a692fa83630e47 (patch) | |
| tree | af5b48598d2420d3389c044b8d61b6fc3e1c2067 | |
| parent | bd7d46ddca06f1fadd68ceb99bc6e6f808ab50f2 (diff) | |
| download | linux-stable-c68e747d0a98f44a4e49071940a692fa83630e47.tar.gz linux-stable-c68e747d0a98f44a4e49071940a692fa83630e47.tar.bz2 linux-stable-c68e747d0a98f44a4e49071940a692fa83630e47.zip | |
llc: Check address length before reading address field
KMSAN will complain if valid address length passed to bind() is shorter
than sizeof(struct sockaddr_llc) bytes.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/llc/af_llc.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c index b99e73a7e7e0..2017b7d780f5 100644 --- a/net/llc/af_llc.c +++ b/net/llc/af_llc.c @@ -320,14 +320,13 @@ static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen) struct llc_sap *sap; int rc = -EINVAL; - dprintk("%s: binding %02X\n", __func__, addr->sllc_sap); - lock_sock(sk); if (unlikely(!sock_flag(sk, SOCK_ZAPPED) || addrlen != sizeof(*addr))) goto out; rc = -EAFNOSUPPORT; if (unlikely(addr->sllc_family != AF_LLC)) goto out; + dprintk("%s: binding %02X\n", __func__, addr->sllc_sap); rc = -ENODEV; rcu_read_lock(); if (sk->sk_bound_dev_if) { |