xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net, sctp: convert sctp_ep_common.refcnt from atomic_t to refcount_t

Browse Source 
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>
This commit is contained in:
Reshetova, Elena
2017-07-04 15:53:28 +03:00
committed by David S. Miller
parent a4b2b58efd
commit c638457a7c
3 changed files with 7 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
net/sctp/endpointola.c
View File

@@ -114,7 +114,7 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
ep->base.type = SCTP_EP_TYPE_SOCKET;
/* Initialize the basic object fields. */
atomic_set(&ep->base.refcnt, 1);
refcount_set(&ep->base.refcnt, 1);
ep->base.dead = false;
/* Create an input queue. */
@@ -285,7 +285,7 @@ static void sctp_endpoint_destroy(struct sctp_endpoint *ep)
/* Hold a reference to an endpoint. */
void sctp_endpoint_hold(struct sctp_endpoint *ep)
{
atomic_inc(&ep->base.refcnt);
refcount_inc(&ep->base.refcnt);
}
/* Release a reference to an endpoint and clean up if there are
@@ -293,7 +293,7 @@ void sctp_endpoint_hold(struct sctp_endpoint *ep)
*/
void sctp_endpoint_put(struct sctp_endpoint *ep)
{
if (atomic_dec_and_test(&ep->base.refcnt))
if (refcount_dec_and_test(&ep->base.refcnt))
sctp_endpoint_destroy(ep);
}