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[IPV6]: IPV6_CHECKSUM socket option can corrupt kernel memory

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So here is a patch that introduces skb_store_bits -- the opposite of
skb_copy_bits, and uses them to read/write the csum field in rawv6.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2005-04-19 22:30:14 -07:00 • committed by David S. Miller
parent fd92833a52
commit 357b40a18b
3 changed files with 130 additions and 13 deletions
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include/linux/skbuff.h
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@ -1183,6 +1183,8 @@ extern unsigned int skb_checksum(const struct sk_buff *skb, int offset,
int len, unsigned int csum);
extern int skb_copy_bits(const struct sk_buff *skb, int offset,
void *to, int len);
extern int skb_store_bits(const struct sk_buff *skb, int offset,
void *from, int len);
extern unsigned int skb_copy_and_csum_bits(const struct sk_buff *skb,
int offset, u8 *to, int len,
unsigned int csum);