From: Igor Ryzhov <iryzhov@nfware.com>
Date: Fri, 20 Feb 2015 13:16:46 +0000 (+0300)
Subject: lpm: fix overflow issue
X-Git-Tag: spdx-start~9602
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=e128e53879c71215c0293f8c7a7a8f0f173487c1;hp=dc783e74cf70c95084e71442ba09b212dded3757;p=dpdk.git

lpm: fix overflow issue

LPM table overflow may occur if table is full and added rule has
the biggest depth that already have some rules.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
---

diff --git a/lib/librte_lpm/rte_lpm.c b/lib/librte_lpm/rte_lpm.c
index 983e04b159..cc51210c43 100644
--- a/lib/librte_lpm/rte_lpm.c
+++ b/lib/librte_lpm/rte_lpm.c
@@ -298,6 +298,9 @@ rule_add(struct rte_lpm *lpm, uint32_t ip_masked, uint8_t depth,
 				return rule_index;
 			}
 		}
+
+		if (rule_index == lpm->max_rules)
+			return -ENOSPC;
 	} else {
 		/* Calculate the position in which the rule will be stored. */
 		rule_index = 0;