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| author | Lv Yunlong <lyl2019@mail.ustc.edu.cn> | 2021-04-26 19:06:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-04-26 23:07:30 +0300 |
| commit | 6d72e7c767acbbdd44ebc7d89c6690b405b32b57 (patch) | |
| tree | 7aaccf01bd1be481d9662bee62901264654a91fc /net/bridge/br_multicast.c | |
| parent | f77bd544a6bbe69aa50d9ed09f13494cf36ff806 (diff) | |
| download | linux-6d72e7c767acbbdd44ebc7d89c6690b405b32b57.tar.xz | |
net:emac/emac-mac: Fix a use after free in emac_mac_tx_buf_send
In emac_mac_tx_buf_send, it calls emac_tx_fill_tpd(..,skb,..).
If some error happens in emac_tx_fill_tpd(), the skb will be freed via
dev_kfree_skb(skb) in error branch of emac_tx_fill_tpd().
But the freed skb is still used via skb->len by netdev_sent_queue(,skb->len).
As i observed that emac_tx_fill_tpd() haven't modified the value of skb->len,
thus my patch assigns skb->len to 'len' before the possible free and
use 'len' instead of skb->len later.
Fixes: b9b17debc69d2 ("net: emac: emac gigabit ethernet controller driver")
Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bridge/br_multicast.c')
0 files changed, 0 insertions, 0 deletions