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spidernet: null out skb pointer after its been used. 

Avoid kernel crash in mm/slab.c due to double-free of pointer.

If the ethernet interface is brought down while there is still
RX traffic in flight, the device shutdown routine can end up
trying to double-free an skb, leading to a crash in mm/slab.c
Avoid the double-free by nulling out the skb pointer.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Linas Vepstas 2007-06-11 13:17:02 -05:00 committed by Jeff Garzik
parent d025d7858f
commit 83d35145c4
1 changed files with 1 additions and 0 deletions
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1
drivers/net/spider_net.c
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@ -1131,6 +1131,7 @@ spider_net_decode_one_descr(struct spider_net_card *card)
/* Ok, we've got a packet in descr */
spider_net_pass_skb_up(descr, card);
descr->skb = NULL;
hwdescr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
return 1;