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NetLabel: fix a cache race condition

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Testing revealed a problem with the NetLabel cache where a cached entry could
be freed while in use by the LSM layer causing an oops and other problems.
This patch fixes that problem by introducing a reference counter to the cache
entry so that it is only freed when it is no longer in use.

Signed-off-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
paul.moore@hp.com
2006-10-04 11:46:31 -04:00
committed by David S. Miller
parent c25d518044
commit ffb733c650
4 changed files with 79 additions and 40 deletions
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2
net/netlabel/netlabel_kapi.c
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@@ -200,7 +200,7 @@ void netlbl_cache_invalidate(void)
int netlbl_cache_add(const struct sk_buff *skb,
const struct netlbl_lsm_secattr *secattr)
{
if (secattr->cache.data == NULL)
if (secattr->cache == NULL)
return -ENOMSG;
if (CIPSO_V4_OPTEXIST(skb))