From e6a1bf13502beaa3a7d912c040f87b82272ea1d8 Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Thu, 15 Aug 2019 06:23:38 -0400 Subject: [PATCH] ceph: don't try fill file_lock on unsuccessful GETFILELOCK reply commit 28a282616f56990547b9dcd5c6fbd2001344664c upstream. 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 Signed-off-by: Jeff Layton Reviewed-by: "Yan, Zheng" Signed-off-by: Ilya Dryomov Signed-off-by: Greg Kroah-Hartman --- fs/ceph/locks.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index e7cce412f2cf..cb647c8c7b68 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -78,8 +78,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file, 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; -- 2.20.1