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pasemi_mac: Fix reuse of free'd skb 

Turns out we're freeing the skb when we detect CRC error, but we're
not clearing out info->skb. We could either clear it and have the stack
reallocate it, or just leave it and the rx ring refill code will reuse
the one that was allocated.

Reusing a freed skb obviously caused some nasty crashes of various kind,
as reported by Brent Baude and David Woodhouse.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Olof Johansson 2007-12-03 21:34:14 -06:00 committed by Jeff Garzik
parent d30f53aeb3
commit 4352d82647
1 changed files with 1 additions and 1 deletions
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2
drivers/net/pasemi_mac.c
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@ -586,7 +586,7 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
/* CRC error flagged */ /* CRC error flagged */
mac->netdev->stats.rx_errors++; mac->netdev->stats.rx_errors++;
mac->netdev->stats.rx_crc_errors++; mac->netdev->stats.rx_crc_errors++;
dev_kfree_skb_irq(skb); /* No need to free skb, it'll be reused */
goto next; goto next;
} }