summaryrefslogtreecommitdiff
path: root/net/sched
diff options
context:
space:
mode:
authorReshetova, Elena <elena.reshetova@intel.com>2017-06-30 13:08:01 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-01 07:39:08 -0700
commit41c6d650f6537e55a1b53438c646fbc3f49176bf (patch)
treed7fb3d5a2f1b3fb0fe76fa010141be563488d36b /net/sched
parent14afee4b6092fde451ee17604e5f5c89da33e71e (diff)
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/sched')
-rw-r--r--net/sched/em_meta.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index eb0e9bab54c1..d6e97115500b 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -340,7 +340,7 @@ META_COLLECTOR(int_sk_refcnt)
*err = -1;
return;
}
- dst->value = atomic_read(&skb->sk->sk_refcnt);
+ dst->value = refcount_read(&skb->sk->sk_refcnt);
}
META_COLLECTOR(int_sk_rcvbuf)