classify: crash on classify filter pcap del command
If classify pcap filter was never configured, typing the delete
command causes a crash. The reason is
cm->classify_table_index_by_sw_if_index not yet allocated.
The fix is to add a check before we access the vector.
Type: fix
Fixes: gerrit 28475
@@ -1786,6 +1786,7 @@ classify_set_pcap_chain (vnet_classify_main_t * cm,
* Put the table index where device drivers can find them.
* This table index will be either a valid table or a ~0 to clear it.
*/
+ if (vec_len (cm->classify_table_index_by_sw_if_index) > sw_if_index)
cm->classify_table_index_by_sw_if_index[sw_if_index] = table_index;
if (sw_if_index > 0)
{
