From: Aleksander Jan Bajkowski olek2@wp.pl
stable inclusion from stable-v5.10.222 commit 22b16618a80858b3a9d607708444426948cc4ae1 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAGEKE CVE: CVE-2024-41046
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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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@p... 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 Signed-off-by: Zhengchao Shao shaozhengchao@huawei.com --- drivers/net/ethernet/lantiq_etop.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/lantiq_etop.c b/drivers/net/ethernet/lantiq_etop.c index a82ba57c4ff5..9ea6c9a7d93f 100644 --- a/drivers/net/ethernet/lantiq_etop.c +++ b/drivers/net/ethernet/lantiq_etop.c @@ -213,9 +213,9 @@ 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]); } }