Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-25 13:41:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

net: add debug check in skb_reset_network_header()

Browse Source 
Make sure (skb->data - skb->head) can fit in skb->network_header

This needs CONFIG_DEBUG_NET=y.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Link: https://patch.msgid.link/20241105174403.850330-7-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2024-11-05 17:44:02 +00:00 committed by Jakub Kicinski
parent ae50ea52bd
commit 305ae87daf
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
include/linux/skbuff.h
View File

@ -3027,7 +3027,10 @@ static inline unsigned char *skb_network_header(const struct sk_buff *skb)
static inline void skb_reset_network_header(struct sk_buff *skb)
{
skb->network_header = skb->data - skb->head;
long offset = skb->data - skb->head;
DEBUG_NET_WARN_ON_ONCE(offset != (typeof(skb->network_header))offset);
skb->network_header = offset;
}
static inline void skb_set_network_header(struct sk_buff *skb, const int offset)