From: Aleksander Jan Bajkowski Date: Wed, 24 Aug 2022 21:54:08 +0000 (+0200) Subject: net: lantiq_xrx200: restore buffer if memory allocation failed X-Git-Tag: v6.1-rc5~537^2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c9c3b1775f80fa21f5bff874027d2ccb10f5d90c;p=platform%2Fkernel%2Flinux-starfive.git net: lantiq_xrx200: restore buffer if memory allocation failed 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: 7ea6cd16f159 ("lantiq: net: fix duplicated skb in rx descriptor ring") Signed-off-by: Aleksander Jan Bajkowski Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/ethernet/lantiq_xrx200.c b/drivers/net/ethernet/lantiq_xrx200.c index 25adce7..57f27cc7 100644 --- a/drivers/net/ethernet/lantiq_xrx200.c +++ b/drivers/net/ethernet/lantiq_xrx200.c @@ -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; }