From 074883a2234c0e3bb60933455f9e93ea4a4f5571 Mon Sep 17 00:00:00 2001 From: Steven Date: Tue, 24 Apr 2018 22:43:07 -0700 Subject: span: crash in span_mirror [VPP-1254] It is possible for span-input to get call with sw_if_index which is greater than sm->interfaces and crashes in span_mirror () in the following line span_interface_t *si0 = vec_elt_at_index (sm->interfaces, sw_if_index0); For example, span-input mirrors a main interface as source, it may actually get call for traffic coming in from the subinterface and crashes. The fix is simply to check if sw_if_index >= vec_len (sm->interfaces) and punt if it is. Change-Id: I8312eb321d638518e14ba2326fffd1a7919646ca Signed-off-by: Steven (cherry picked from commit 516d63ff2c6671f3b0dc641511a50017a9804179) --- src/vnet/span/node.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'src/vnet/span') diff --git a/src/vnet/span/node.c b/src/vnet/span/node.c index 8e2105bcc82..13e92abd5eb 100644 --- a/src/vnet/span/node.c +++ b/src/vnet/span/node.c @@ -70,9 +70,14 @@ span_mirror (vlib_main_t * vm, vlib_node_runtime_t * node, u32 sw_if_index0, vnet_main_t *vnm = &vnet_main; u32 *to_mirror_next = 0; u32 i; + span_interface_t *si0; + span_mirror_t *sm0; - span_interface_t *si0 = vec_elt_at_index (sm->interfaces, sw_if_index0); - span_mirror_t *sm0 = &si0->mirror_rxtx[sf][rxtx]; + if (sw_if_index0 >= vec_len (sm->interfaces)) + return; + + si0 = vec_elt_at_index (sm->interfaces, sw_if_index0); + sm0 = &si0->mirror_rxtx[sf][rxtx]; if (sm0->num_mirror_ports == 0) return; -- cgit 1.2.3-korg