From: Chas Williams <3chas3@gmail.com>
Date: Thu, 1 Oct 2020 10:22:44 +0000 (-0400)
Subject: net: check segment pointer in raw checksum processing
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d98b0fc1af6c3c752304f3910da1d97a57ddd53b;p=dpdk.git

net: check segment pointer in raw checksum processing

If the overall pkt_len and segment lengths are out of agreement,
it is possible for the seg to be NULL after the loop. Add assert
to check this condition in debug builds. Otherwise, return failure.

Fixes: c442fed81bb9 ("net: add function to calculate checksum in mbuf")
Cc: stable@dpdk.org

Signed-off-by: Chas Williams <3chas3@gmail.com>
---

diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index bb55ebb6fa..8382d0fac7 100644
--- a/lib/librte_net/rte_ip.h
+++ b/lib/librte_net/rte_ip.h
@@ -225,6 +225,9 @@ rte_raw_cksum_mbuf(const struct rte_mbuf *m, uint32_t off, uint32_t len,
 			break;
 		off -= seglen;
 	}
+	RTE_ASSERT(seg != NULL);
+	if (seg == NULL)
+		return -1;
 	seglen -= off;
 	buf = rte_pktmbuf_mtod_offset(seg, const char *, off);
 	if (seglen >= len) {