From da5dedfe33ca3cafb4cd6d90d34219d31cf69acb Mon Sep 17 00:00:00 2001 From: Neale Ranns Date: Mon, 20 Jan 2020 02:28:00 +0000 Subject: [PATCH] fib: FIB crash removing labelled route (VPP-1818) Type: fix The crash occured trying to retreive a NULL path list to walk the path extensions. A walk shoul not be required, because there should be no extensins, since all paths are removed. The problem is that when the paths were added, they were not sorted, hence neither were the extensions and when they were updated, duplicate extensions were added, and hence a path removal did not remove them all. Fix is to make sure paths are sorted. Change-Id: I069d937de8e7bc8aae3d92f588db4daff727d863 Signed-off-by: Neale Ranns (cherry picked from commit 257749c40946a9269140d322e374d74c3b6eefb8) --- src/vnet/fib/fib_table.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/src/vnet/fib/fib_table.c b/src/vnet/fib/fib_table.c index ac0f2da6696..ec2acc59c52 100644 --- a/src/vnet/fib/fib_table.c +++ b/src/vnet/fib/fib_table.c @@ -580,6 +580,13 @@ fib_table_entry_path_add (u32 fib_index, return (fib_entry_index); } +static int +fib_route_path_cmp_for_sort (void * v1, + void * v2) +{ + return (fib_route_path_cmp(v1, v2)); +} + fib_node_index_t fib_table_entry_path_add2 (u32 fib_index, const fib_prefix_t *prefix, @@ -598,6 +605,11 @@ fib_table_entry_path_add2 (u32 fib_index, { fib_table_route_path_fixup(prefix, &flags, &rpaths[ii]); } + /* + * sort the paths provided by the control plane. this means + * the paths and the extension on the entry will be sorted. + */ + vec_sort_with_function(rpaths, fib_route_path_cmp_for_sort); if (FIB_NODE_INDEX_INVALID == fib_entry_index) { @@ -740,13 +752,6 @@ fib_table_entry_path_remove (u32 fib_index, vec_free(paths); } -static int -fib_route_path_cmp_for_sort (void * v1, - void * v2) -{ - return (fib_route_path_cmp(v1, v2)); -} - fib_node_index_t fib_table_entry_update (u32 fib_index, const fib_prefix_t *prefix, -- 2.16.6