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ceph: fix NULL dereference in ceph_queue_cap_snap()
author
Yan, Zheng
<zyan@redhat.com>
Wed, 15 Jun 2016 12:51:22 +0000
(20:51 +0800)
committer
Ilya Dryomov
<idryomov@gmail.com>
Thu, 28 Jul 2016 00:55:40 +0000
(
02:55
+0200)
old_snapc->seq is used in dout(...)
Signed-off-by: Yan, Zheng <zyan@redhat.com>
fs/ceph/snap.c
patch
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diff --git
a/fs/ceph/snap.c
b/fs/ceph/snap.c
index
9caaa7f
..
eadf2c3
100644
(file)
--- a/
fs/ceph/snap.c
+++ b/
fs/ceph/snap.c
@@
-551,7
+551,6
@@
void ceph_queue_cap_snap(struct ceph_inode_info *ci)
ci->i_wrbuffer_ref_head = 0;
capsnap->context = old_snapc;
list_add_tail(&capsnap->ci_item, &ci->i_cap_snaps);
- old_snapc = NULL;
if (used & CEPH_CAP_FILE_WR) {
dout("queue_cap_snap %p cap_snap %p snapc %p"
@@
-563,6
+562,7
@@
void ceph_queue_cap_snap(struct ceph_inode_info *ci)
__ceph_finish_cap_snap(ci, capsnap);
}
capsnap = NULL;
+ old_snapc = NULL;
update_snapc:
if (ci->i_head_snapc) {