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authorStefano Stabellini <sstabellini@kernel.org>2017-04-13 20:57:56 +0300
committerJuergen Gross <jgross@suse.com>2017-05-02 12:13:23 +0300
commit31d47266c6e599d76e84c9809f9ea2735d9cda5b (patch)
tree675cd7a2b5f9af5d922aa9f1e50f2ff65f9782c9 /net/9p/trans_xen.c
parent29985b09613ba106a1ed0496988636d288600515 (diff)
downloadlinux-31d47266c6e599d76e84c9809f9ea2735d9cda5b.tar.xz
xen/9pfs: initialize len to 0 to detect xenbus_read errors
In order to use "len" to check for xenbus_read errors properly, we need to initialize len to 0 before passing it to xenbus_read. CC: dan.carpenter@oracle.com CC: jgross@suse.com CC: boris.ostrovsky@oracle.com CC: Eric Van Hensbergen <ericvh@gmail.com> CC: Ron Minnich <rminnich@sandia.gov> CC: Latchesar Ionkov <lucho@ionkov.net> CC: v9fs-developer@lists.sourceforge.net Signed-off-by: Stefano Stabellini <stefano@aporeto.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'net/9p/trans_xen.c')
-rw-r--r--net/9p/trans_xen.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c
index 47864245c0d4..71e85643b3f9 100644
--- a/net/9p/trans_xen.c
+++ b/net/9p/trans_xen.c
@@ -386,7 +386,7 @@ static int xen_9pfs_front_probe(struct xenbus_device *dev,
struct xenbus_transaction xbt;
struct xen_9pfs_front_priv *priv = NULL;
char *versions;
- unsigned int max_rings, max_ring_order, len;
+ unsigned int max_rings, max_ring_order, len = 0;
versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len);
if (!len)