From: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
Date: Wed, 27 Apr 2016 15:07:53 +0000 (+0200)
Subject: lpm6: fix possible garbage in lookup
X-Git-Tag: spdx-start~6980
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;ds=inline;h=9199cd6d51737a4f1e5a3170ff3d1d38258243ee;p=dpdk.git

lpm6: fix possible garbage in lookup

Fix issue reported by clang scan-build

Value of pointer tbl_next was uninitialized. When function lookup_step()
take else branch it may provide garbage into tbl = tbl_next;

Fixes: 5c510e13a9cb ("lpm: add IPv6 support")

Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
---

diff --git a/lib/librte_lpm/rte_lpm6.c b/lib/librte_lpm/rte_lpm6.c
index ba4353cedf..32fdba01e8 100644
--- a/lib/librte_lpm/rte_lpm6.c
+++ b/lib/librte_lpm/rte_lpm6.c
@@ -601,7 +601,7 @@ int
 rte_lpm6_lookup(const struct rte_lpm6 *lpm, uint8_t *ip, uint8_t *next_hop)
 {
 	const struct rte_lpm6_tbl_entry *tbl;
-	const struct rte_lpm6_tbl_entry *tbl_next;
+	const struct rte_lpm6_tbl_entry *tbl_next = NULL;
 	int status;
 	uint8_t first_byte;
 	uint32_t tbl24_index;
@@ -636,7 +636,7 @@ rte_lpm6_lookup_bulk_func(const struct rte_lpm6 *lpm,
 {
 	unsigned i;
 	const struct rte_lpm6_tbl_entry *tbl;
-	const struct rte_lpm6_tbl_entry *tbl_next;
+	const struct rte_lpm6_tbl_entry *tbl_next = NULL;
 	uint32_t tbl24_index;
 	uint8_t first_byte, next_hop;
 	int status;