Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=406a1d868001423c85a3165288e566e65f424fe6 Commit: 406a1d868001423c85a3165288e566e65f424fe6 Parent: 29ffe1a5c52dae13b6efead97aab9b058f38fce4 Author: Herbert Xu <[EMAIL PROTECTED]> AuthorDate: Mon Jan 28 20:47:09 2008 -0800 Committer: David S. Miller <[EMAIL PROTECTED]> CommitDate: Thu Jan 31 19:27:08 2008 -0800
[AUDIT]: Increase skb->truesize in audit_expand The recent UDP patch exposed this bug in the audit code. It was calling pskb_expand_head without increasing skb->truesize. The caller of pskb_expand_head needs to do so because that function is designed to be called in places where truesize is already fixed and therefore it doesn't update its value. Because the audit system is using it in a place where the truesize has not yet been fixed, it needs to update its value manually. Signed-off-by: Herbert Xu <[EMAIL PROTECTED]> Acked-by: James Morris <[EMAIL PROTECTED]> Signed-off-by: David S. Miller <[EMAIL PROTECTED]> --- kernel/audit.c | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/kernel/audit.c b/kernel/audit.c index f93c271..801c946 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1200,13 +1200,17 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, static inline int audit_expand(struct audit_buffer *ab, int extra) { struct sk_buff *skb = ab->skb; - int ret = pskb_expand_head(skb, skb_headroom(skb), extra, - ab->gfp_mask); + int oldtail = skb_tailroom(skb); + int ret = pskb_expand_head(skb, 0, extra, ab->gfp_mask); + int newtail = skb_tailroom(skb); + if (ret < 0) { audit_log_lost("out of memory in audit_expand"); return 0; } - return skb_tailroom(skb); + + skb->truesize += newtail - oldtail; + return newtail; } /* - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html