GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

[NET]: Warn in __skb_trim if skb is paged

Browse source 
It's better to warn and fail rather than rarely triggering BUG on paths
that incorrectly call skb_trim/__skb_trim on a non-linear skb.

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 2006-06-09 16:13:38 -07:00 • committed by David S. Miller
parent b38dfee3d6
commit 3cc0e87398
2 changed files with 14 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

24
include/linux/skbuff.h
View file

@ -975,15 +975,16 @@ static inline void skb_reserve(struct sk_buff *skb, int len)
#define NET_SKB_PAD 16
#endif
extern int ___pskb_trim(struct sk_buff *skb, unsigned int len, int realloc);
extern int ___pskb_trim(struct sk_buff *skb, unsigned int len);
static inline void __skb_trim(struct sk_buff *skb, unsigned int len)
{
if (!skb->data_len) {
skb->len = len;
skb->tail = skb->data + len;
} else
___pskb_trim(skb, len, 0);
if (unlikely(skb->data_len)) {
WARN_ON(1);
return;
}
skb->len = len;
skb->tail = skb->data + len;
}
/**
@ -993,6 +994,7 @@ static inline void __skb_trim(struct sk_buff *skb, unsigned int len)
*
* Cut the length of a buffer down by removing data from the tail. If
* the buffer is already under the length specified it is not modified.
* The skb must be linear.
*/
static inline void skb_trim(struct sk_buff *skb, unsigned int len)
{
@ -1003,12 +1005,10 @@ static inline void skb_trim(struct sk_buff *skb, unsigned int len)
static inline int __pskb_trim(struct sk_buff *skb, unsigned int len)
{
if (!skb->data_len) {
skb->len = len;
skb->tail = skb->data+len;
return 0;
}
return ___pskb_trim(skb, len, 1);
if (skb->data_len)
return ___pskb_trim(skb, len);
__skb_trim(skb, len);
return 0;
}
static inline int pskb_trim(struct sk_buff *skb, unsigned int len)