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[IPSEC] flow: Fix potential memory leak 

When old flow cache entries that are not at the head of their chain
trigger a transient security error they get unlinked along with all
the entries preceding them in the chain.  The preceding entries are
not freed correctly.

This patch fixes this by simply leaving the entry around.  It's based
on a suggestion by Venkat Yekkirala.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2007-01-10 22:06:32 -08:00 committed by David S. Miller
parent 419dd8378d
commit e0e8f1c822
1 changed files with 8 additions and 14 deletions
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22
net/core/flow.c
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@ -231,22 +231,16 @@ nocache:
err = resolver(key, family, dir, &obj, &obj_ref);
if (fle) {
if (err) {
/* Force security policy check on next lookup */
*head = fle->next;
flow_entry_kill(cpu, fle);
} else {
fle->genid = atomic_read(&flow_cache_genid);
if (fle && !err) {
fle->genid = atomic_read(&flow_cache_genid);
if (fle->object)
atomic_dec(fle->object_ref);
if (fle->object)
atomic_dec(fle->object_ref);
fle->object = obj;
fle->object_ref = obj_ref;
if (obj)
atomic_inc(fle->object_ref);
}
fle->object = obj;
fle->object_ref = obj_ref;
if (obj)
atomic_inc(fle->object_ref);
}
local_bh_enable();