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lmc: Read outside array bounds

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If dev_alloc_skb() fails on the first iteration of the allocation loop,
then we end up writing before the start of the array.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
roel kluin 2009-08-10 01:29:52 +00:00 committed by David S. Miller
parent a6fa328665
commit 8dd07086a1
1 changed files with 4 additions and 3 deletions
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7
drivers/net/wan/lmc/lmc_main.c
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@ -1897,11 +1897,12 @@ static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
/*
* Sets end of ring
*/
sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
sc->lmc_rxring[i - 1].buffer2 = virt_to_bus (&sc->lmc_rxring[0]); /* Point back to the start */
if (i != 0) {
sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
}
LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
/* Initialize the transmit rings and buffers */
for (i = 0; i < LMC_TXDESCS; i++)
{