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34 lines
1.1 KiB
Diff
34 lines
1.1 KiB
Diff
From c8b043702dc0894c07721c5b019096cebc8c798f Mon Sep 17 00:00:00 2001
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From: Aleksander Jan Bajkowski <olek2@wp.pl>
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Date: Wed, 24 Aug 2022 23:54:06 +0200
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Subject: [PATCH] net: lantiq_xrx200: confirm skb is allocated before using
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xrx200_hw_receive() assumes build_skb() always works and goes straight
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to skb_reserve(). However, build_skb() can fail under memory pressure.
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Add a check in case build_skb() failed to allocate and return NULL.
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Fixes: e015593573b3 ("net: lantiq_xrx200: convert to build_skb")
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Reported-by: Eric Dumazet <edumazet@google.com>
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Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
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Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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---
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drivers/net/ethernet/lantiq_xrx200.c | 6 ++++++
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1 file changed, 6 insertions(+)
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--- a/drivers/net/ethernet/lantiq_xrx200.c
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+++ b/drivers/net/ethernet/lantiq_xrx200.c
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@@ -239,6 +239,12 @@ static int xrx200_hw_receive(struct xrx2
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}
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skb = build_skb(buf, priv->rx_skb_size);
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+ if (!skb) {
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+ skb_free_frag(buf);
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+ net_dev->stats.rx_dropped++;
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+ return -ENOMEM;
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+ }
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+
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skb_reserve(skb, NET_SKB_PAD);
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skb_put(skb, len);
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