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| author | Philippe Guibert <philippe.guibert@6wind.com> | 2020-08-21 08:42:20 +0200 |
|---|---|---|
| committer | Philippe Guibert <philippe.guibert@6wind.com> | 2020-08-21 13:37:08 +0200 |
| commit | c24ceb896e9b93abd8a3d03ded9a703324c56a11 (patch) | |
| tree | fc8cfd61d724e6a5c3ec3ceb7fc9c78554612112 /bgpd/bgp_flowspec_vty.c | |
| parent | 4371bf9110261f81edfd457a33f86cb0ce12ada7 (diff) | |
bgpd: fix Dereference of null pointer in flowspec
a dereference of null pointer exists in current flowspec code, with
prefix pointer. check validity of pointer before going ahead.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Diffstat (limited to 'bgpd/bgp_flowspec_vty.c')
| -rw-r--r-- | bgpd/bgp_flowspec_vty.c | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/bgpd/bgp_flowspec_vty.c b/bgpd/bgp_flowspec_vty.c index 92bec6f88a..798bce8219 100644 --- a/bgpd/bgp_flowspec_vty.c +++ b/bgpd/bgp_flowspec_vty.c @@ -274,36 +274,33 @@ void route_vty_out_flowspec(struct vty *vty, const struct prefix *p, dest = path->net; if (dest) bgp_dest_get_bgp_table_info(dest); - /* Print prefix */ - if (p != NULL) { - if (p->family != AF_FLOWSPEC) - return; - if (json_paths) { - if (display == NLRI_STRING_FORMAT_JSON) - json_nlri_path = json_object_new_object(); - else - json_nlri_path = json_paths; - } - if (display == NLRI_STRING_FORMAT_LARGE && path) - vty_out(vty, "BGP flowspec entry: (flags 0x%x)\n", - path->flags); - bgp_fs_nlri_get_string((unsigned char *) - p->u.prefix_flowspec.ptr, - p->u.prefix_flowspec.prefixlen, - return_string, - display, - json_nlri_path, - family2afi(p->u.prefix_flowspec - .family)); - if (display == NLRI_STRING_FORMAT_LARGE) - vty_out(vty, "%s", return_string); - else if (display == NLRI_STRING_FORMAT_DEBUG) - vty_out(vty, "%s", return_string); - else if (display == NLRI_STRING_FORMAT_MIN) - vty_out(vty, " %-30s", return_string); - else if (json_paths && display == NLRI_STRING_FORMAT_JSON) - json_object_array_add(json_paths, json_nlri_path); + if (p == NULL || p->family != AF_FLOWSPEC) + return; + if (json_paths) { + if (display == NLRI_STRING_FORMAT_JSON) + json_nlri_path = json_object_new_object(); + else + json_nlri_path = json_paths; } + if (display == NLRI_STRING_FORMAT_LARGE && path) + vty_out(vty, "BGP flowspec entry: (flags 0x%x)\n", + path->flags); + bgp_fs_nlri_get_string((unsigned char *) + p->u.prefix_flowspec.ptr, + p->u.prefix_flowspec.prefixlen, + return_string, + display, + json_nlri_path, + family2afi(p->u.prefix_flowspec + .family)); + if (display == NLRI_STRING_FORMAT_LARGE) + vty_out(vty, "%s", return_string); + else if (display == NLRI_STRING_FORMAT_DEBUG) + vty_out(vty, "%s", return_string); + else if (display == NLRI_STRING_FORMAT_MIN) + vty_out(vty, " %-30s", return_string); + else if (json_paths && display == NLRI_STRING_FORMAT_JSON) + json_object_array_add(json_paths, json_nlri_path); if (!path) return; if (path->attr && |