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authorStefano Garzarella <sgarzare@redhat.com>2021-03-11 14:52:57 +0100
committerMichael S. Tsirkin <mst@redhat.com>2021-03-14 18:10:07 -0400
commit0bde59c1723a29e294765c96dbe5c7fb639c2f96 (patch)
tree9d9138624f98034333fc7ab409786b993f0602d3 /drivers/vhost
parentf6bbf0010ba004f5e90c7aefdebc0ee4bd3283b9 (diff)
vhost-vdpa: set v->config_ctx to NULL if eventfd_ctx_fdget() fails
In vhost_vdpa_set_config_call() if eventfd_ctx_fdget() fails the 'v->config_ctx' contains an error instead of a valid pointer. Since we consider 'v->config_ctx' valid if it is not NULL, we should set it to NULL in this case to avoid to use an invalid pointer in other functions such as vhost_vdpa_config_put(). Fixes: 776f395004d8 ("vhost_vdpa: Support config interrupt in vdpa") Cc: lingshan.zhu@intel.com Cc: stable@vger.kernel.org Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20210311135257.109460-3-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'drivers/vhost')
-rw-r--r--drivers/vhost/vdpa.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
index 4fc768813c4a..e0a27e336293 100644
--- a/drivers/vhost/vdpa.c
+++ b/drivers/vhost/vdpa.c
@@ -331,8 +331,12 @@ static long vhost_vdpa_set_config_call(struct vhost_vdpa *v, u32 __user *argp)
if (!IS_ERR_OR_NULL(ctx))
eventfd_ctx_put(ctx);
- if (IS_ERR(v->config_ctx))
- return PTR_ERR(v->config_ctx);
+ if (IS_ERR(v->config_ctx)) {
+ long ret = PTR_ERR(v->config_ctx);
+
+ v->config_ctx = NULL;
+ return ret;
+ }
v->vdpa->config->set_config_cb(v->vdpa, &cb);