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@@ -0,0 +1,24 @@
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+From: Felix Fietkau <[email protected]>
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+Date: Tue, 15 Oct 2024 10:13:55 +0200
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+Subject: [PATCH] net: ethernet: mtk_eth_soc: fix memory corruption during fq
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+ dma init
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+
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+The loop responsible for allocating up to MTK_FQ_DMA_LENGTH buffers must
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+only touch as many descriptors, otherwise it ends up corrupting unrelated
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+memory. Fix the loop iteration count accordingly.
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+
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+Fixes: c57e55819443 ("net: ethernet: mtk_eth_soc: handle dma buffer size soc specific")
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+Signed-off-by: Felix Fietkau <[email protected]>
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+---
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+
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+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
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+@@ -1172,7 +1172,7 @@ static int mtk_init_fq_dma(struct mtk_et
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+ if (unlikely(dma_mapping_error(eth->dma_dev, dma_addr)))
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+ return -ENOMEM;
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+
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+- for (i = 0; i < cnt; i++) {
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++ for (i = 0; i < len; i++) {
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+ struct mtk_tx_dma_v2 *txd;
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+
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+ txd = eth->scratch_ring + (j * MTK_FQ_DMA_LENGTH + i) * soc->tx.desc_size;
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Felix Fietkau