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| author |   Yan, Zheng <zyan@redhat.com> | 2019-02-11 15:18:52 +0800 |
|---|---|---|
| committer |   Ilya Dryomov <idryomov@gmail.com> | 2019-02-18 18:08:29 +0100 |
| commit | 04242ff3ac0abbaa4362f97781dac268e6c3541a (patch) | |
| tree | 26b1402043c10e71033660d05689bf6315be7e8c /fs | |
| parent | libceph: handle an empty authorize reply (diff) | |
| download | wireguard-linux-04242ff3ac0abbaa4362f97781dac268e6c3541a.tar.xz wireguard-linux-04242ff3ac0abbaa4362f97781dac268e6c3541a.zip | |
ceph: avoid repeatedly adding inode to mdsc->snap_flush_list
Otherwise, mdsc->snap_flush_list may get corrupted.
Cc: stable@vger.kernel.org
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/snap.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 041c27ea8de1..f74193da0e09 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -616,7 +616,8 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci, capsnap->size); spin_lock(&mdsc->snap_flush_lock); - list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list); + if (list_empty(&ci->i_snap_flush_item)) + list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list); spin_unlock(&mdsc->snap_flush_lock); return 1; /* caller may want to ceph_flush_snaps */ } |