27 lines
761 B
Diff
27 lines
761 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Sun, 12 Apr 2015 22:28:20 +0200
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Subject: [PATCH] bgmac: add check for oversized packets
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In very rare cases, the MAC can catch an internal buffer that is bigger
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than it's supposed to be. Instead of crashing the kernel, simply pass
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the buffer back to the hardware
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/drivers/net/ethernet/broadcom/bgmac.c
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+++ b/drivers/net/ethernet/broadcom/bgmac.c
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@@ -445,6 +445,13 @@ static int bgmac_dma_rx_read(struct bgma
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break;
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}
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+ if (len > BGMAC_RX_ALLOC_SIZE) {
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+ bgmac_err(bgmac, "Found oversized packet at slot %d, DMA issue!\n",
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+ ring->start);
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+ put_page(virt_to_head_page(buf));
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+ break;
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+ }
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+
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/* Omit CRC. */
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len -= ETH_FCS_LEN;
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