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net: ethernet: lantiq_etop: fix double free in detach

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The number of the currently released descriptor is never incremented
which results in the same skb being released multiple times.

Fixes: 504d4721ee ("MIPS: Lantiq: Add ethernet driver")
Reported-by: Joe Perches <joe@perches.com>
Closes: https://lore.kernel.org/all/fc1bf93d92bb5b2f99c6c62745507cc22f3a7b2d.camel@perches.com/
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20240708205826.5176-1-olek2@wp.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Aleksander Jan Bajkowski 2024-07-08 22:58:26 +02:00 committed by Jakub Kicinski
parent 01fc5142ae
commit e1533b6319
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/lantiq_etop.c
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@ -217,9 +217,9 @@ ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
if (ch->dma.irq) if (ch->dma.irq)
free_irq(ch->dma.irq, priv); free_irq(ch->dma.irq, priv);
if (IS_RX(ch->idx)) { if (IS_RX(ch->idx)) {
int desc; struct ltq_dma_channel *dma = &ch->dma;
for (desc = 0; desc < LTQ_DESC_NUM; desc++) for (dma->desc = 0; dma->desc < LTQ_DESC_NUM; dma->desc++)
dev_kfree_skb_any(ch->skb[ch->dma.desc]); dev_kfree_skb_any(ch->skb[ch->dma.desc]);
} }
} }