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[PATCH] add new audit data to last skb

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When adding more formatted audit data to an skb for delivery to userspace,
the kernel will attempt to reuse an skb that has spare room.  However, if
the audit message has already been fragmented to multiple skb's, the search
for spare room in the skb uses the head of the list.  This will corrupt the
audit message with trailing bytes being placed midway through the stream.
Fix is to look at the end of the list.

Signed-off-by: Chris Wright <chrisw@osdl.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
Chris Wright 2005-05-03 14:01:15 +01:00 committed by David Woodhouse
parent 27b030d58c
commit 0dd8e06bda
1 changed files with 1 additions and 1 deletions
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2
kernel/audit.c
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@ -486,7 +486,7 @@ static void audit_log_move(struct audit_buffer *ab)
if (ab->len == 0)
return;
skb = skb_peek(&ab->sklist);
skb = skb_peek_tail(&ab->sklist);
if (!skb || skb_tailroom(skb) <= ab->len + extra) {
skb = alloc_skb(2 * ab->len + extra, GFP_ATOMIC);
if (!skb) {