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net: lantiq_xrx200: restore buffer if memory allocation failed

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In a situation where memory allocation fails, an invalid buffer address
is stored. When this descriptor is used again, the system panics in the
build_skb() function when accessing memory.

Fixes: 7ea6cd16f1 ("lantiq: net: fix duplicated skb in rx descriptor ring")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Aleksander Jan Bajkowski 2022-08-24 23:54:08 +02:00 committed by Jakub Kicinski
parent c4b6e9341f
commit c9c3b1775f
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/lantiq_xrx200.c
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@ -193,6 +193,7 @@ static int xrx200_alloc_buf(struct xrx200_chan *ch, void *(*alloc)(unsigned int
ch->rx_buff[ch->dma.desc] = alloc(priv->rx_skb_size);
if (!ch->rx_buff[ch->dma.desc]) {
ch->rx_buff[ch->dma.desc] = buf;
ret = -ENOMEM;
goto skip;
}