[dpdk-dev] [PATCH] ipsec: fix use of uninitialized variable

[Konstantin Ananyev]

Defects reported by coverity scan
uninit_use_in_call: Using uninitialized element of array clen when
calling cpu_crypto_bulk.

Coverity issue: 354233, 354234
Fixes: 957394f72658 ("ipsec: support CPU crypto mode")

Signed-off-by: Konstantin Ananyev <konstantin.ananyev at intel.com>
---
 lib/librte_ipsec/esp_inb.c  | 4 +++-
 lib/librte_ipsec/esp_outb.c | 4 +++-
 lib/librte_ipsec/misc.h     | 3 ++-
 3 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/librte_ipsec/esp_inb.c b/lib/librte_ipsec/esp_inb.c
index 7b8ab81f6..96eec0131 100644
--- a/lib/librte_ipsec/esp_inb.c
+++ b/lib/librte_ipsec/esp_inb.c
@@ -737,7 +737,9 @@ cpu_inb_pkt_prepare(const struct rte_ipsec_session *ss,
 		move_bad_mbufs(mb, dr, num, num - k);
 
 	/* convert mbufs to iovecs and do actual crypto/auth processing */
-	cpu_crypto_bulk(ss, sa->cofs, mb, iv, aad, dgst, l4ofs, clen, k);
+	if (k != 0)
+		cpu_crypto_bulk(ss, sa->cofs, mb, iv, aad, dgst,
+			l4ofs, clen, k);
 	return k;
 }
 
diff --git a/lib/librte_ipsec/esp_outb.c b/lib/librte_ipsec/esp_outb.c
index b6d9cbe98..fb9d5864c 100644
--- a/lib/librte_ipsec/esp_outb.c
+++ b/lib/librte_ipsec/esp_outb.c
@@ -502,7 +502,9 @@ cpu_outb_pkt_prepare(const struct rte_ipsec_session *ss,
 		move_bad_mbufs(mb, dr, n, n - k);
 
 	/* convert mbufs to iovecs and do actual crypto/auth processing */
-	cpu_crypto_bulk(ss, sa->cofs, mb, iv, aad, dgst, l4ofs, clen, k);
+	if (k != 0)
+		cpu_crypto_bulk(ss, sa->cofs, mb, iv, aad, dgst,
+			l4ofs, clen, k);
 	return k;
 }
 
diff --git a/lib/librte_ipsec/misc.h b/lib/librte_ipsec/misc.h
index 53c0457af..771602950 100644
--- a/lib/librte_ipsec/misc.h
+++ b/lib/librte_ipsec/misc.h
@@ -106,7 +106,8 @@ mbuf_cut_seg_ofs(struct rte_mbuf *mb, struct rte_mbuf *ms, uint32_t ofs,
 }
 
 /*
- * process packets using sync crypto engine
+ * process packets using sync crypto engine.
+ * expects *num* to be greater then zero.
  */
 static inline void
 cpu_crypto_bulk(const struct rte_ipsec_session *ss,
-- 
2.17.1