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net: ethernet: lantiq_etop: fix double free in detach

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[ Upstream commit e1533b6319ab9c3a97dad314dd88b3783bc41b69 ]

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

Fixes: 504d4721ee8e ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 1a2db00a554cfda57c397cce79b2804bf9633fec)
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
This commit is contained in:
Aleksander Jan Bajkowski 2024-07-08 22:58:26 +02:00 committed by Vegard Nossum
parent 95139b5d59
commit ae3b644b83
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/lantiq_etop.c
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@ -221,9 +221,9 @@ ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
if (ch->dma.irq)
free_irq(ch->dma.irq, priv);
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]);
}
}