diff options
| author | Felix Fietkau | 2024-10-15 08:21:47 +0000 |
|---|---|---|
| committer | Felix Fietkau | 2024-10-15 08:22:02 +0000 |
| commit | 506d0c421b1b0df6adb75506b3b20622b264b15f (patch) | |
| tree | 46ab8a8b23c2a9c9e73444eb48aa4e34b0ca4a0e | |
| parent | 1bd6dda198eb44f6f34f3646c628dc248e5699fe (diff) | |
| download | openwrt-506d0c421b1b0df6adb75506b3b20622b264b15f.tar.gz | |
kernel: fix mtk_eth_soc memory corruption issue on fq dma init
Signed-off-by: Felix Fietkau <nbd@nbd.name>
| -rw-r--r-- | target/linux/generic/pending-6.6/735-net-ethernet-mtk_eth_soc-fix-memory-corruption-durin.patch | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/target/linux/generic/pending-6.6/735-net-ethernet-mtk_eth_soc-fix-memory-corruption-durin.patch b/target/linux/generic/pending-6.6/735-net-ethernet-mtk_eth_soc-fix-memory-corruption-durin.patch new file mode 100644 index 0000000000..5d7902b1cf --- /dev/null +++ b/target/linux/generic/pending-6.6/735-net-ethernet-mtk_eth_soc-fix-memory-corruption-durin.patch @@ -0,0 +1,24 @@ +From: Felix Fietkau <nbd@nbd.name> +Date: Tue, 15 Oct 2024 10:13:55 +0200 +Subject: [PATCH] net: ethernet: mtk_eth_soc: fix memory corruption during fq + dma init + +The loop responsible for allocating up to MTK_FQ_DMA_LENGTH buffers must +only touch as many descriptors, otherwise it ends up corrupting unrelated +memory. Fix the loop iteration count accordingly. + +Fixes: c57e55819443 ("net: ethernet: mtk_eth_soc: handle dma buffer size soc specific") +Signed-off-by: Felix Fietkau <nbd@nbd.name> +--- + +--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c ++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c +@@ -1172,7 +1172,7 @@ static int mtk_init_fq_dma(struct mtk_et + if (unlikely(dma_mapping_error(eth->dma_dev, dma_addr))) + return -ENOMEM; + +- for (i = 0; i < cnt; i++) { ++ for (i = 0; i < len; i++) { + struct mtk_tx_dma_v2 *txd; + + txd = eth->scratch_ring + (j * MTK_FQ_DMA_LENGTH + i) * soc->tx.desc_size; |