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From: Chas Williams <3chas3@gmail.com>
To: dev@dpdk.org
Cc: olivier.matz@6wind.com, Chas Williams <3chas3@gmail.com>
Subject: [dpdk-dev] [PATCH v2 1/2] net: check that seg is valid before dereference
Date: Thu,  1 Oct 2020 06:22:44 -0400
Message-ID: <20201001102245.326223-1-3chas3@gmail.com> (raw)
In-Reply-To: <20200928153219.285343-1-3chas3@gmail.com>

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")

Signed-off-by: Chas Williams <3chas3@gmail.com>
---
 lib/librte_net/rte_ip.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/librte_net/rte_ip.h b/lib/librte_net/rte_ip.h
index fcd1eb342..b2bb5d7b9 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) {
-- 
2.26.2


  parent reply	other threads:[~2020-10-01 10:36 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-28 15:32 [dpdk-dev] [PATCH] " Chas Williams
2020-09-29  3:01 ` wangyunjian
2020-09-29 20:19   ` Chas Williams
2020-10-01 10:22 ` Chas Williams [this message]
2020-10-01 10:22   ` [dpdk-dev] [PATCH v2 2/2] net/virtio: check return from rte_raw_cksum_mbuf Chas Williams
2020-10-06 21:15     ` Thomas Monjalon
2020-10-09  7:14     ` Maxime Coquelin
2020-10-12 21:15       ` Thomas Monjalon

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