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authorElena Reshetova <elena.reshetova@intel.com>2017-03-17 15:10:29 +0300
committerIlya Dryomov <idryomov@gmail.com>2017-05-04 10:19:19 +0300
commit0e1a5ee6577e43e5be55369d398107080b360941 (patch)
treecb477c8e45675979e72a53013290e69e462f9ef1 /net/ceph/pagelist.c
parent02113a0f14e20bd8e675d7cec16db6eaaf2b2380 (diff)
downloadlinux-0e1a5ee6577e43e5be55369d398107080b360941.tar.xz
libceph: convert ceph_pagelist.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. 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: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net/ceph/pagelist.c')
-rw-r--r--net/ceph/pagelist.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ceph/pagelist.c b/net/ceph/pagelist.c
index 6864007e64fc..ce09f73be759 100644
--- a/net/ceph/pagelist.c
+++ b/net/ceph/pagelist.c
@@ -16,7 +16,7 @@ static void ceph_pagelist_unmap_tail(struct ceph_pagelist *pl)
void ceph_pagelist_release(struct ceph_pagelist *pl)
{
- if (!atomic_dec_and_test(&pl->refcnt))
+ if (!refcount_dec_and_test(&pl->refcnt))
return;
ceph_pagelist_unmap_tail(pl);
while (!list_empty(&pl->head)) {