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authorHerbert Xu <herbert@gondor.apana.org.au>2007-01-10 22:06:32 -0800
committerDavid S. Miller <davem@sunset.davemloft.net>2007-01-23 20:25:39 -0800
commite0e8f1c8220c43bdf25cfb5622f6ab6947027fb1 (patch)
tree545e9985c6fc2e9b7e1a9019ce48ce05b848d0d6 /net/core/flow.c
parent419dd8378dfa32985672ab7927b4bc827f33b332 (diff)
downloadop-kernel-dev-e0e8f1c8220c43bdf25cfb5622f6ab6947027fb1.zip
op-kernel-dev-e0e8f1c8220c43bdf25cfb5622f6ab6947027fb1.tar.gz
[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>
Diffstat (limited to 'net/core/flow.c')
-rw-r--r--net/core/flow.c26
1 files changed, 10 insertions, 16 deletions
diff --git a/net/core/flow.c b/net/core/flow.c
index d137f97..5d25697 100644
--- a/net/core/flow.c
+++ b/net/core/flow.c
@@ -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->object)
- atomic_dec(fle->object_ref);
-
- fle->object = obj;
- fle->object_ref = obj_ref;
- if (obj)
- atomic_inc(fle->object_ref);
- }
+ if (fle && !err) {
+ fle->genid = atomic_read(&flow_cache_genid);
+
+ if (fle->object)
+ atomic_dec(fle->object_ref);
+
+ fle->object = obj;
+ fle->object_ref = obj_ref;
+ if (obj)
+ atomic_inc(fle->object_ref);
}
local_bh_enable();
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