diff options
| author | Yan, Zheng <zyan@redhat.com> | 2017-06-22 16:26:34 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-07-07 17:25:13 +0200 |
| commit | 62a65f36d016fff32179acdbfcb8b2d8d9e54757 (patch) | |
| tree | 4e78b5d157227e97ecfcb75e1a49d0b60ad37941 /fs/ceph/mds_client.c | |
| parent | 1684dd03e9f59212775cafa50ea77b9ef5b263db (diff) | |
ceph: avoid invalid memory dereference in the middle of umount
extra_mon_dispatch() and debugfs' foo_show functions dereference
fsc->mdsc. we should clean up fsc->client->extra_mon_dispatch
and debugfs before destroying fsc->mds.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/mds_client.c')
| -rw-r--r-- | fs/ceph/mds_client.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 0c05df44cc6c..666a9f274832 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3769,13 +3769,13 @@ static void ceph_mdsc_stop(struct ceph_mds_client *mdsc) void ceph_mdsc_destroy(struct ceph_fs_client *fsc) { struct ceph_mds_client *mdsc = fsc->mdsc; - dout("mdsc_destroy %p\n", mdsc); - ceph_mdsc_stop(mdsc); /* flush out any connection work with references to us */ ceph_msgr_flush(); + ceph_mdsc_stop(mdsc); + fsc->mdsc = NULL; kfree(mdsc); dout("mdsc_destroy %p done\n", mdsc); |