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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 /fs/ceph
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 'fs/ceph')
-rw-r--r--fs/ceph/mds_client.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 074490542b4c..b16f1cf552a8 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -1991,7 +1991,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
if (req->r_pagelist) {
struct ceph_pagelist *pagelist = req->r_pagelist;
- atomic_inc(&pagelist->refcnt);
+ refcount_inc(&pagelist->refcnt);
ceph_msg_data_add_pagelist(msg, pagelist);
msg->hdr.data_len = cpu_to_le32(pagelist->length);
} else {