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authorJia-Ju Bai <baijiaju1990@gmail.com>2020-05-30 05:41:50 +0300
committerDavid S. Miller <davem@davemloft.net>2020-06-01 21:52:59 +0300
commit3e1c6846b9e108740ef8a37be80314053f5dd52a (patch)
tree4c57ea55d26523b47401b18674b7ea1adf01fdf5 /drivers/net/vmxnet3
parent0af413bd3e2de73bcf0742ed556be4af83c71964 (diff)
downloadlinux-3e1c6846b9e108740ef8a37be80314053f5dd52a.tar.xz
net: vmxnet3: fix possible buffer overflow caused by bad DMA value in vmxnet3_get_rss()
The value adapter->rss_conf is stored in DMA memory, and it is assigned to rssConf, so rssConf->indTableSize can be modified at anytime by malicious hardware. Because rssConf->indTableSize is assigned to n, buffer overflow may occur when the code "rssConf->indTable[n]" is executed. To fix this possible bug, n is checked after being used. Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/vmxnet3')
-rw-r--r--drivers/net/vmxnet3/vmxnet3_ethtool.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
index bfdda0f34b97..6acaafe169de 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
@@ -954,6 +954,8 @@ vmxnet3_get_rss(struct net_device *netdev, u32 *p, u8 *key, u8 *hfunc)
*hfunc = ETH_RSS_HASH_TOP;
if (!p)
return 0;
+ if (n > UPT1_RSS_MAX_IND_TABLE_SIZE)
+ return 0;
while (n--)
p[n] = rssConf->indTable[n];
return 0;