diff options
| author | Eric Dumazet <edumazet@google.com> | 2026-01-30 16:02:53 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-02-02 17:24:14 -0800 |
| commit | dc9fd14bd75967d039262d73189fdd123edc5dce (patch) | |
| tree | 2c534a82819d36fbc384226ae788429c1df57403 /include | |
| parent | 87ef8c26ae40bbac8515f239cc02c3e08916ef4d (diff) | |
net: add a debug check in __skb_push()
Add the following check, to detect bugs sooner for CONFIG_DEBUG_NET=y
builds.
DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head);
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260130160253.2936789-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/skbuff.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index e6bfe5d0c525..8b399ddf1b9b 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -2813,6 +2813,7 @@ static inline void *__skb_push(struct sk_buff *skb, unsigned int len) DEBUG_NET_WARN_ON_ONCE(len > INT_MAX); skb->data -= len; + DEBUG_NET_WARN_ON_ONCE(skb->data < skb->head); skb->len += len; return skb->data; } |