Re: [PATCH] Bluetooth: Silence static checker warning.
From: Marcel Holtmann <hidden>
Date: 2012-02-29 17:39:16
Also in:
kernel-janitors, linux-bluetooth, lkml
Hi Santosh,
quoted hunk ↗ jump to hunk
Silencing Static checker warning. 1. Endian warning 2. variable dereferenced before check 'sk' . Signed-off-by: Santosh Nayak <redacted> --- net/bluetooth/l2cap_sock.c | 9 ++++++--- 1 files changed, 6 insertions(+), 3 deletions(-)diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 401d942..d206321 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c@@ -82,7 +82,7 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen) } if (la.l2_cid) - err = l2cap_add_scid(chan, la.l2_cid); + err = l2cap_add_scid(chan, __le16_to_cpu(la.l2_cid)); else err = l2cap_add_psm(chan, &la.l2_bdaddr, la.l2_psm);@@ -123,7 +123,8 @@ static int l2cap_sock_connect(struct socket *sock, struct sockaddr *addr, int al if (la.l2_cid && la.l2_psm) return -EINVAL; - err = l2cap_chan_connect(chan, la.l2_psm, la.l2_cid, &la.l2_bdaddr); + err = l2cap_chan_connect(chan, la.l2_psm, __le16_to_cpu(la.l2_cid), + &la.l2_bdaddr); if (err) goto done;
I am not sure about this one. Need to go back and read through the source code. The value provided from userspace is already in the right host endian. Could be that we mess up our internal classification. And instead of adding __le16_to_cpu we should fix its classification.
quoted hunk ↗ jump to hunk
@@ -795,7 +796,7 @@ static void l2cap_sock_kill(struct sock *sk) static int l2cap_sock_shutdown(struct socket *sock, int how) { struct sock *sk = sock->sk; - struct l2cap_chan *chan = l2cap_pi(sk)->chan; + struct l2cap_chan *chan; int err = 0; BT_DBG("sock %p, sk %p", sock, sk);@@ -803,6 +804,8 @@ static int l2cap_sock_shutdown(struct socket *sock, int how) if (!sk) return 0; + chan = l2cap_pi(sk)->chan; + lock_sock(sk); if (!sk->sk_shutdown) { if (chan->mode == L2CAP_MODE_ERTM)
This one is fine. Regards Marcel