From: Hans Dedecker Date: Thu, 12 Feb 2015 16:41:16 +0000 (+0100) Subject: netifd: Keep reference to a config copy in device type specific reload handler as... X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=2af71375f7a03d78dc9e3e4155e59e51f17a8327;p=oweals%2Fnetifd.git netifd: Keep reference to a config copy in device type specific reload handler as the original config pointer might go stale Fixes random observed crashes in blobmsg_parse when device type specific config data is parsed. Signed-off-by: Hans Dedecker --- diff --git a/bridge.c b/bridge.c index f8478ad..7076fd7 100644 --- a/bridge.c +++ b/bridge.c @@ -491,6 +491,7 @@ bridge_free(struct device *dev) bst = container_of(dev, struct bridge_state, dev); vlist_flush_all(&bst->members); + free(bst->config_data); free(bst); } @@ -594,6 +595,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr) BUILD_BUG_ON(sizeof(diff) < __DEV_ATTR_MAX / 8); bst = container_of(dev, struct bridge_state, dev); + attr = blob_memdup(attr); blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev, blob_data(attr), blob_len(attr)); @@ -627,6 +629,7 @@ bridge_reload(struct device *dev, struct blob_attr *attr) bridge_config_init(dev); } + free(bst->config_data); bst->config_data = attr; return ret; } diff --git a/macvlan.c b/macvlan.c index 019a7ff..051fe05 100644 --- a/macvlan.c +++ b/macvlan.c @@ -140,6 +140,7 @@ macvlan_free(struct device *dev) mvdev = container_of(dev, struct macvlan_device, dev); device_remove_user(&mvdev->parent); + free(mvdev->config_data); free(mvdev); } @@ -197,6 +198,7 @@ macvlan_reload(struct device *dev, struct blob_attr *attr) struct macvlan_device *mvdev; mvdev = container_of(dev, struct macvlan_device, dev); + attr = blob_memdup(attr); blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev, blob_data(attr), blob_len(attr)); @@ -226,6 +228,7 @@ macvlan_reload(struct device *dev, struct blob_attr *attr) macvlan_config_init(dev); } + free(mvdev->config_data); mvdev->config_data = attr; return ret; } diff --git a/vlandev.c b/vlandev.c index 7b2038e..884e6ef 100644 --- a/vlandev.c +++ b/vlandev.c @@ -131,6 +131,7 @@ vlandev_free(struct device *dev) mvdev = container_of(dev, struct vlandev_device, dev); device_remove_user(&mvdev->parent); + free(mvdev->config_data); free(mvdev); } @@ -185,6 +186,7 @@ vlandev_reload(struct device *dev, struct blob_attr *attr) struct vlandev_device *mvdev; mvdev = container_of(dev, struct vlandev_device, dev); + attr = blob_memdup(attr); blobmsg_parse(device_attr_list.params, __DEV_ATTR_MAX, tb_dev, blob_data(attr), blob_len(attr)); @@ -214,6 +216,7 @@ vlandev_reload(struct device *dev, struct blob_attr *attr) vlandev_config_init(dev); } + free(mvdev->config_data); mvdev->config_data = attr; return ret; }