[dpdk-dev] [PATCH] mbuf: Fix illegal pointer access to mempool members
From: <hidden>
Date: 2021-03-30 02:13:26
Subsystem:
library code, the rest · Maintainers:
Andrew Morton, Linus Torvalds
From: wenwu ma <redacted> Before accessing the private data of mempool in function rte_pktmbuf_priv_size() and rte_pktmbuf_data_room_size(), it is necessary to determine whether the private data exists, otherwise it will cause null pointer access. Signed-off-by: wenwu ma <redacted> --- lib/librte_mbuf/rte_mbuf.h | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index c4c9ebfaa..9cca9a7d4 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h@@ -811,6 +811,9 @@ rte_pktmbuf_data_room_size(struct rte_mempool *mp) { struct rte_pktmbuf_pool_private *mbp_priv; + if (mp->private_data_size != sizeof(struct rte_pktmbuf_pool_private)) + return 0; + mbp_priv = (struct rte_pktmbuf_pool_private *)rte_mempool_get_priv(mp); return mbp_priv->mbuf_data_room_size; }
@@ -832,6 +835,9 @@ rte_pktmbuf_priv_size(struct rte_mempool *mp) { struct rte_pktmbuf_pool_private *mbp_priv; + if (mp->private_data_size != sizeof(struct rte_pktmbuf_pool_private)) + return 0; + mbp_priv = (struct rte_pktmbuf_pool_private *)rte_mempool_get_priv(mp); return mbp_priv->mbuf_priv_size; }
--
2.25.1