drivers/net/ethernet/mediatek/mtk_wed.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
In mtk_wed_tx_ring_setup(.., int idx, ..), idx is used as an index here
struct mtk_wed_ring *ring = &dev->tx_ring[idx];
The bounds of idx are checked here
BUG_ON(idx > ARRAY_SIZE(dev->tx_ring));
If idx is the size of the array, it will pass this check and overflow.
So change the check to >= .
Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Tom Rix <trix@redhat.com>
---
drivers/net/ethernet/mediatek/mtk_wed.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c
index 8f0cd3196aac..29be2fcafea3 100644
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -651,7 +651,7 @@ mtk_wed_tx_ring_setup(struct mtk_wed_device *dev, int idx, void __iomem *regs)
* WDMA RX.
*/
- BUG_ON(idx > ARRAY_SIZE(dev->tx_ring));
+ BUG_ON(idx >= ARRAY_SIZE(dev->tx_ring));
if (mtk_wed_ring_alloc(dev, ring, MTK_WED_TX_RING_SIZE))
return -ENOMEM;
--
2.27.0
Hello: This patch was applied to netdev/net.git (master) by Jakub Kicinski <kuba@kernel.org>: On Sat, 16 Jul 2022 17:46:54 -0400 you wrote: > In mtk_wed_tx_ring_setup(.., int idx, ..), idx is used as an index here > struct mtk_wed_ring *ring = &dev->tx_ring[idx]; > > The bounds of idx are checked here > BUG_ON(idx > ARRAY_SIZE(dev->tx_ring)); > > If idx is the size of the array, it will pass this check and overflow. > So change the check to >= . > > [...] Here is the summary with links: - net: ethernet: mtk_eth_soc: fix off by one check of ARRAY_SIZE https://git.kernel.org/netdev/net/c/3696c952da07 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
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