diff options
| author | Tom Rix <trix@redhat.com> | 2022-07-16 17:46:54 -0400 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-07-18 20:12:04 -0700 |
| commit | 3696c952da0733b843c8da3441345055b1cbacd9 (patch) | |
| tree | 91d266fd05ba2f582643d503cacc304e721c6382 | |
| parent | b6224a36de8bb30bfec9ff2bc45ed8002e79a79a (diff) | |
net: ethernet: mtk_eth_soc: fix off by one check of ARRAY_SIZE
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>
Link: https://lore.kernel.org/r/20220716214654.1540240-1-trix@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_wed.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |