From: Björn Töpel <bjorn.topel@xxxxxxxxx>
In AF_XDP the socket state needs to be checked, prior touching the
members of the socket. This was not the case for the recvmsg
implementation. Fix that by moving the xsk_is_bound() call.
Reported-by: kernel test robot <oliver.sang@xxxxxxxxx>
Fixes: 45a86681844e ("xsk: Add support for recvmsg()")
Signed-off-by: Björn Töpel <bjorn.topel@xxxxxxxxx>
---
net/xdp/xsk.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index 56c46e5f57bc..e28c6825e089 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -554,12 +554,12 @@ static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int fl
struct sock *sk = sock->sk;
struct xdp_sock *xs = xdp_sk(sk);
+ if (unlikely(!xsk_is_bound(xs)))
+ return -ENXIO;
if (unlikely(!(xs->dev->flags & IFF_UP)))
return -ENETDOWN;
if (unlikely(!xs->rx))
return -ENOBUFS;
- if (unlikely(!xsk_is_bound(xs)))
- return -ENXIO;
if (unlikely(need_wait))
return -EOPNOTSUPP;
base-commit: 34da87213d3ddd26643aa83deff7ffc6463da0fc
--
2.27.0
