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authorJeff Layton <jlayton@kernel.org>2019-08-15 06:23:38 -0400
committerIlya Dryomov <idryomov@gmail.com>2019-08-22 10:47:41 +0200
commit28a282616f56990547b9dcd5c6fbd2001344664c (patch)
treea2e75a574bf4690086e37be5cb5871902937ba07
parentc95f1c5f436badb9bb87e9b30fd573f6b3d59423 (diff)
downloadlinux-28a282616f56990547b9dcd5c6fbd2001344664c.tar.bz2
ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply
When ceph_mdsc_do_request returns an error, we can't assume that the filelock_reply pointer will be set. Only try to fetch fields out of the r_reply_info when it returns success. Cc: stable@vger.kernel.org Reported-by: Hector Martin <hector@marcansoft.com> Signed-off-by: Jeff Layton <jlayton@kernel.org> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
-rw-r--r--fs/ceph/locks.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index ac9b53b89365..5083e238ad15 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -111,8 +111,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct inode *inode,
req->r_wait_for_completion = ceph_lock_wait_for_completion;
err = ceph_mdsc_do_request(mdsc, inode, req);
-
- if (operation == CEPH_MDS_OP_GETFILELOCK) {
+ if (!err && operation == CEPH_MDS_OP_GETFILELOCK) {
fl->fl_pid = -le64_to_cpu(req->r_reply_info.filelock_reply->pid);
if (CEPH_LOCK_SHARED == req->r_reply_info.filelock_reply->type)
fl->fl_type = F_RDLCK;