diff options
| author | Aleksander Jan Bajkowski <olek2@wp.pl> | 2022-08-24 23:54:06 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-08-25 21:41:38 +0200 |
| commit | c8b043702dc0894c07721c5b019096cebc8c798f (patch) | |
| tree | 8c74a7e4a530a6e81e78362a455922335c4f30f1 /drivers/net/ethernet | |
| parent | net: stmmac: work around sporadic tx issue on link-up (diff) | |
| download | linux-c8b043702dc0894c07721c5b019096cebc8c798f.tar.xz linux-c8b043702dc0894c07721c5b019096cebc8c798f.zip | |
net: lantiq_xrx200: confirm skb is allocated before using
xrx200_hw_receive() assumes build_skb() always works and goes straight
to skb_reserve(). However, build_skb() can fail under memory pressure.
Add a check in case build_skb() failed to allocate and return NULL.
Fixes: e015593573b3 ("net: lantiq_xrx200: convert to build_skb")
Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/lantiq_xrx200.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/lantiq_xrx200.c b/drivers/net/ethernet/lantiq_xrx200.c index 5edb68a8aab1..89314b645c82 100644 --- a/drivers/net/ethernet/lantiq_xrx200.c +++ b/drivers/net/ethernet/lantiq_xrx200.c @@ -239,6 +239,12 @@ static int xrx200_hw_receive(struct xrx200_chan *ch) } skb = build_skb(buf, priv->rx_skb_size); + if (!skb) { + skb_free_frag(buf); + net_dev->stats.rx_dropped++; + return -ENOMEM; + } + skb_reserve(skb, NET_SKB_PAD); skb_put(skb, len); |