From c3267ed944b47c5894be916cb9a440413b8802f8 Mon Sep 17 00:00:00 2001 From: Matthew Smith Date: Tue, 15 May 2018 15:51:30 -0500 Subject: Fix failure during enable/disable of features vnet_feature_enable_disable_with_index() checks the return status of vnet_config_{add,del}_feature(). If the config string heap index returned is the same index that was in use prior to the add/delete, it is concluded that a failure occurred and processing of the feature stops. Sometimes the config index that is returned can legitimately be the same index that was in used before the add/delete. The old list of features can have its heap entry deallocated before a new entry for the new list is allocated. The heap entry for the new list can be the entry that was deallocated while deleting the old one. Make vnet_config_{add,del}_feature() return ~0 on failure. Look for that return value as an indication that an error occurred in vnet_enable_disable_feature_by_index(). Change-Id: I88bb3ff88a76971c1b5e5ece74784ce8ba78373c Signed-off-by: Matthew Smith --- src/vnet/feature/feature.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/vnet/feature/feature.c') diff --git a/src/vnet/feature/feature.c b/src/vnet/feature/feature.c index 97100049b86..714e20e8e72 100644 --- a/src/vnet/feature/feature.c +++ b/src/vnet/feature/feature.c @@ -186,7 +186,7 @@ vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index, vnet_feature_main_t *fm = &feature_main; vnet_feature_config_main_t *cm; i16 feature_count; - u32 old_ci, ci; + u32 ci; if (arc_index == (u8) ~ 0) return VNET_API_ERROR_INVALID_VALUE; @@ -196,7 +196,7 @@ vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index, cm = &fm->feature_config_mains[arc_index]; vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0); - old_ci = ci = cm->config_index_by_sw_if_index[sw_if_index]; + ci = cm->config_index_by_sw_if_index[sw_if_index]; vec_validate (fm->feature_count_by_sw_if_index[arc_index], sw_if_index); feature_count = fm->feature_count_by_sw_if_index[arc_index][sw_if_index]; @@ -209,7 +209,7 @@ vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index, : vnet_config_del_feature) (vlib_get_main (), &cm->config_main, ci, feature_index, feature_config, n_feature_config_bytes); - if (old_ci == ci) + if (ci == ~0) { return 0; } -- cgit 1.2.3-korg