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| author | Aleksander Jan Bajkowski <olek2@wp.pl> | 2022-03-05 12:20:39 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-07 11:29:35 +0000 |
| commit | dd830aed23c6e07cd8e2a163742bf3d63c9add08 (patch) | |
| tree | 632d939d9251e0464b357b3171f2d7d78f7c3810 /drivers/net | |
| parent | e0058f0fa80f6e09c4d363779c241c45a3c56b94 (diff) | |
| download | linux-stable-dd830aed23c6e07cd8e2a163742bf3d63c9add08.tar.gz linux-stable-dd830aed23c6e07cd8e2a163742bf3d63c9add08.tar.bz2 linux-stable-dd830aed23c6e07cd8e2a163742bf3d63c9add08.zip | |
net: lantiq_xrx200: fix use after free bug
The skb->len field is read after the packet is sent to the network
stack. In the meantime, skb can be freed. This patch fixes this bug.
Fixes: c3e6b2c35b34 ("net: lantiq_xrx200: add ingress SG DMA support")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/ethernet/lantiq_xrx200.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/lantiq_xrx200.c b/drivers/net/ethernet/lantiq_xrx200.c index 41d11137cde0..5712c3e94be8 100644 --- a/drivers/net/ethernet/lantiq_xrx200.c +++ b/drivers/net/ethernet/lantiq_xrx200.c @@ -260,9 +260,9 @@ static int xrx200_hw_receive(struct xrx200_chan *ch) if (ctl & LTQ_DMA_EOP) { ch->skb_head->protocol = eth_type_trans(ch->skb_head, net_dev); - netif_receive_skb(ch->skb_head); net_dev->stats.rx_packets++; net_dev->stats.rx_bytes += ch->skb_head->len; + netif_receive_skb(ch->skb_head); ch->skb_head = NULL; ch->skb_tail = NULL; ret = XRX200_DMA_PACKET_COMPLETE; |