Messages in this thread Patch in this message | | | From | Hangyu Hua <> | Subject | [PATCH 1/3] net: ethernet: bcmasp: fix possible OOB write in bcmasp_netfilt_get_all_active() | Date | Wed, 6 Sep 2023 17:21:05 +0800 |
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rule_locs is allocated in ethtool_get_rxnfc and the size is determined by rule_cnt from user space. So rule_cnt needs to be check before using rule_locs to avoid OOB writing or NULL pointer dereference.
Fixes: c5d511c49587 ("net: bcmasp: Add support for wake on net filters") Signed-off-by: Hangyu Hua <hbh25y@gmail.com> --- drivers/net/ethernet/broadcom/asp2/bcmasp.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/broadcom/asp2/bcmasp.c b/drivers/net/ethernet/broadcom/asp2/bcmasp.c index d63d321f3e7b..4df2ca871af8 100644 --- a/drivers/net/ethernet/broadcom/asp2/bcmasp.c +++ b/drivers/net/ethernet/broadcom/asp2/bcmasp.c @@ -535,6 +535,9 @@ void bcmasp_netfilt_get_all_active(struct bcmasp_intf *intf, u32 *rule_locs, int j = 0, i; for (i = 0; i < NUM_NET_FILTERS; i++) { + if (j == *rule_cnt) + break; + if (!priv->net_filters[i].claimed || priv->net_filters[i].port != intf->port) continue; -- 2.34.1
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