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| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-06-30 12:08:01 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-01 16:39:08 +0200 |
| commit | 41c6d650f6537e55a1b53438c646fbc3f49176bf (patch) | |
| tree | d7fb3d5a2f1b3fb0fe76fa010141be563488d36b /net/ipv4/inet_connection_sock.c | |
| parent | net: convert sock.sk_wmem_alloc from atomic_t to refcount_t (diff) | |
| download | linux-41c6d650f6537e55a1b53438c646fbc3f49176bf.tar.xz linux-41c6d650f6537e55a1b53438c646fbc3f49176bf.zip | |
net: convert sock.sk_refcnt 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.
This patch uses refcount_inc_not_zero() instead of
atomic_inc_not_zero_hint() due to absense of a _hint()
version of refcount API. If the hint() version must
be used, we might need to revisit API.
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/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index a3fa1a5b6d98..4089c013cb03 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -756,7 +756,7 @@ static void reqsk_queue_hash_req(struct request_sock *req, * are committed to memory and refcnt initialized. */ smp_wmb(); - atomic_set(&req->rsk_refcnt, 2 + 1); + refcount_set(&req->rsk_refcnt, 2 + 1); } void inet_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req, |