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authorStefano Stabellini <sstabellini@kernel.org>2018-12-21 23:06:30 (GMT)
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2019-01-02 16:00:10 (GMT)
commit96283f9a084e23d7cda2d3c5d1ffa6df6cf1ecec (patch)
treefe0a1cbbe09216545c426d7743f954feff8c07a3 /drivers/xen
parentb79470b64fa9266948d1ce8d825ced94c4f63293 (diff)
pvcalls-front: don't try to free unallocated rings
inflight_req_id is 0 when initialized. If inflight_req_id is 0, there is no accept_map to free. Fix the check in pvcalls_front_release. Signed-off-by: Stefano Stabellini <stefanos@xilinx.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen')
-rw-r--r--drivers/xen/pvcalls-front.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index e5d95aa..4f3d664 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -1030,8 +1030,8 @@ int pvcalls_front_release(struct socket *sock)
spin_lock(&bedata->socket_lock);
list_del(&map->list);
spin_unlock(&bedata->socket_lock);
- if (READ_ONCE(map->passive.inflight_req_id) !=
- PVCALLS_INVALID_ID) {
+ if (READ_ONCE(map->passive.inflight_req_id) != PVCALLS_INVALID_ID &&
+ READ_ONCE(map->passive.inflight_req_id) != 0) {
pvcalls_front_free_map(bedata,
map->passive.accept_map);
}

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