From 10aa14527f458e9867cf3d2cc6b8cb0f6704448b Mon Sep 17 00:00:00 2001 From: Tomas Bortoli Date: Fri, 27 Jul 2018 13:05:58 +0200 Subject: 9p: fix multiple NULL-pointer-dereferences Added checks to prevent GPFs from raising. Link: http://lkml.kernel.org/r/20180727110558.5479-1-tomasbortoli@gmail.com Signed-off-by: Tomas Bortoli Reported-by: syzbot+1a262da37d3bead15c39@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Dominique Martinet --- net/9p/trans_xen.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'net/9p/trans_xen.c') diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c index 2e2b8bca54f3..c2d54ac76bfd 100644 --- a/net/9p/trans_xen.c +++ b/net/9p/trans_xen.c @@ -94,6 +94,9 @@ static int p9_xen_create(struct p9_client *client, const char *addr, char *args) { struct xen_9pfs_front_priv *priv; + if (addr == NULL) + return -EINVAL; + read_lock(&xen_9pfs_lock); list_for_each_entry(priv, &xen_9pfs_devs, list) { if (!strcmp(priv->tag, addr)) { -- cgit v1.2.3