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net/ice/base: check number of chained recipes

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When we add some long switch rule, we need check the
number of final recipe number, if it is large than
ICE_MAX_CHAIN_RECIPE, we should refuse this rule.
For example:

"flow create 0 ingress pattern eth / ipv6
src is CDCD:910A:2222:5498:8475:1111:3900:1536
dst is CDCD:910A:2222:5498:8475:1111:3900:2022
tc is 3 / udp dst is 45 / end actions queue index 2 / end"

This rule will consume 6 recipe, if it is not refused, it
will cause the following code over write of lkup_indx and mask.

LIST_FOR_EACH_ENTRY(entry, &rm->rg_list, ice_recp_grp_entry,
		l_entry) {
	last_chain_entry->fv_idx[i] = entry->chain_idx;
	buf[recps].content.lkup_indx[i] = entry->chain_idx;
	buf[recps].content.mask[i++] = CPU_TO_LE16(0xFFFF);
	..........
}

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Nannan Lu <nannan.lu@intel.com>
This commit is contained in:
Wei Zhao 2020-04-10 08:41:55 +08:00 committed by Ferruh Yigit
parent 024225981c
commit 312acce5e2
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ice/base/ice_switch.c
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@ -5352,6 +5352,9 @@ ice_add_sw_recipe(struct ice_hw *hw, struct ice_sw_recipe *rm,
rm->n_grp_count++;
}
if (rm->n_grp_count > ICE_MAX_CHAIN_RECIPE)
return ICE_ERR_MAX_LIMIT;
tmp = (struct ice_aqc_recipe_data_elem *)ice_calloc(hw,
ICE_MAX_NUM_RECIPES,
sizeof(*tmp));