diff options
| author |   Björn Töpel <bjorn.topel@intel.com> | 2019-09-04 13:49:13 +0200 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2019-09-05 14:11:52 +0200 |
| commit | 25dc18ff9b583a76fff00c7d9d14a40524653c45 (patch) | |
| tree | 44b3cf7745546d08d882b8e09403bbe14d6fcf04 /net | |
| parent | xsk: use state member for socket synchronization (diff) | |
| download | linux-dev-25dc18ff9b583a76fff00c7d9d14a40524653c45.tar.xz linux-dev-25dc18ff9b583a76fff00c7d9d14a40524653c45.zip | |
xsk: lock the control mutex in sock_diag interface
When accessing the members of an XDP socket, the control mutex should
be held. This commit fixes that.
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Fixes: a36b38aa2af6 ("xsk: add sock_diag interface for AF_XDP")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/xdp/xsk_diag.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/xdp/xsk_diag.c b/net/xdp/xsk_diag.c index 9986a759fe06..f59791ba43a0 100644 --- a/net/xdp/xsk_diag.c +++ b/net/xdp/xsk_diag.c @@ -97,6 +97,7 @@ static int xsk_diag_fill(struct sock *sk, struct sk_buff *nlskb, msg->xdiag_ino = sk_ino; sock_diag_save_cookie(sk, msg->xdiag_cookie); + mutex_lock(&xs->mutex); if ((req->xdiag_show & XDP_SHOW_INFO) && xsk_diag_put_info(xs, nlskb)) goto out_nlmsg_trim; @@ -117,10 +118,12 @@ static int xsk_diag_fill(struct sock *sk, struct sk_buff *nlskb, sock_diag_put_meminfo(sk, nlskb, XDP_DIAG_MEMINFO)) goto out_nlmsg_trim; + mutex_unlock(&xs->mutex); nlmsg_end(nlskb, nlh); return 0; out_nlmsg_trim: + mutex_unlock(&xs->mutex); nlmsg_cancel(nlskb, nlh); return -EMSGSIZE; } |