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| author | David S. Miller | 2006-04-20 09:10:50 +0200 |
|---|---|---|
| committer | David S. Miller | 2006-04-20 09:10:50 +0200 |
| commit | dc6de33674608f978ec29f5c2f7e3af458c06f78 (patch) | |
| tree | 1b314717cdb27cf75478c13f85249f85f6997f48 /include/linux/skbuff.h | |
| parent | [TCP]: Account skb overhead in tcp_fragment (diff) | |
| download | kernel-qcow2-linux-dc6de33674608f978ec29f5c2f7e3af458c06f78.tar.gz kernel-qcow2-linux-dc6de33674608f978ec29f5c2f7e3af458c06f78.tar.xz kernel-qcow2-linux-dc6de33674608f978ec29f5c2f7e3af458c06f78.zip | |
[NET]: Add skb->truesize assertion checking.
Add some sanity checking. truesize should be at least sizeof(struct
sk_buff) plus the current packet length. If not, then truesize is
seriously mangled and deserves a kernel log message.
Currently we'll do the check for release of stream socket buffers.
But we can add checks to more spots over time.
Incorporating ideas from Herbert Xu.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index c4619a428d9b..f8f234708b98 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -344,6 +344,13 @@ extern void skb_over_panic(struct sk_buff *skb, int len, void *here); extern void skb_under_panic(struct sk_buff *skb, int len, void *here); +extern void skb_truesize_bug(struct sk_buff *skb); + +static inline void skb_truesize_check(struct sk_buff *skb) +{ + if (unlikely((int)skb->truesize < sizeof(struct sk_buff) + skb->len)) + skb_truesize_bug(skb); +} extern int skb_append_datato_frags(struct sock *sk, struct sk_buff *skb, int getfrag(void *from, char *to, int offset, |