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 ba4353c..32fdba0 100644 (file)
--- 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;