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| author | Pavel Emelyanov <xemul@openvz.org> | 2007-11-26 20:23:31 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2007-11-26 20:23:31 +0800 |
| commit | 218ad12f42e0b6207105cde8fd13017d1ed449e4 (patch) | |
| tree | 2f79b20a20ccfeeea1f44b82d9ec2ef0eb2758de /include/net | |
| parent | 8053fc3de720e1027d690f892ff7d7c1737fdd9d (diff) | |
| download | linux-218ad12f42e0b6207105cde8fd13017d1ed449e4.tar.gz | |
[IPV4]: Fix memory leak in inet_hashtables.h when NUMA is on
The inet_ehash_locks_alloc() looks like this: #ifdef CONFIG_NUMA if (size > PAGE_SIZE) x = vmalloc(...); else #endif x = kmalloc(...); Unlike it, the inet_ehash_locks_alloc() looks like this: #ifdef CONFIG_NUMA if (size > PAGE_SIZE) vfree(x); else #else kfree(x); #endif The error is obvious - if the NUMA is on and the size is less than the PAGE_SIZE we leak the pointer (kfree is inside the #else branch). Compiler doesn't warn us because after the kfree(x) there's a "x = NULL" assignment, so here's another (minor?) bug: we don't set x to NULL under certain circumstances. Boring explanation, I know... Patch explains it better. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/inet_hashtables.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h index 469216d93663..37f6cb112127 100644 --- a/include/net/inet_hashtables.h +++ b/include/net/inet_hashtables.h @@ -186,9 +186,8 @@ static inline void inet_ehash_locks_free(struct inet_hashinfo *hashinfo) if (size > PAGE_SIZE) vfree(hashinfo->ehash_locks); else -#else - kfree(hashinfo->ehash_locks); #endif + kfree(hashinfo->ehash_locks); hashinfo->ehash_locks = NULL; } } |