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authorReshetova, Elena <elena.reshetova@intel.com>2017-06-30 13:08:09 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-01 07:39:09 -0700
commitb4217b82893c23f9f45f77914b5aa3b662b75332 (patch)
tree895da6d6919ceb4425c2392588a9a788baed5adb /net/ipv4/cipso_ipv4.c
parentc122e14df2d64311d1f0c0bbf4d8f42a7a8baf41 (diff)
net: convert netlbl_lsm_cache.refcount from atomic_t to refcount_t
refcount_t type and corresponding API should be used instead of atomic_t when the variable is used as a reference counter. This allows to avoid accidental refcounter overflows that might lead to use-after-free situations. Signed-off-by: Elena Reshetova <elena.reshetova@intel.com> Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: David Windsor <dwindsor@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/cipso_ipv4.c')
-rw-r--r--net/ipv4/cipso_ipv4.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index ae206163c273..c2044775ae7d 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -265,7 +265,7 @@ static int cipso_v4_cache_check(const unsigned char *key,
entry->key_len == key_len &&
memcmp(entry->key, key, key_len) == 0) {
entry->activity += 1;
- atomic_inc(&entry->lsm_data->refcount);
+ refcount_inc(&entry->lsm_data->refcount);
secattr->cache = entry->lsm_data;
secattr->flags |= NETLBL_SECATTR_CACHE;
secattr->type = NETLBL_NLTYPE_CIPSOV4;
@@ -332,7 +332,7 @@ int cipso_v4_cache_add(const unsigned char *cipso_ptr,
}
entry->key_len = cipso_ptr_len;
entry->hash = cipso_v4_map_cache_hash(cipso_ptr, cipso_ptr_len);
- atomic_inc(&secattr->cache->refcount);
+ refcount_inc(&secattr->cache->refcount);
entry->lsm_data = secattr->cache;
bkt = entry->hash & (CIPSO_V4_CACHE_BUCKETS - 1);