mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-07 17:19:02 +00:00
Code Issues Releases Wiki Activity

ceph: fix use-after-free for fsc->mdsc

Browse source 
[ Upstream commit a7caa88f8b ]

If the ceph_mdsc_init() fails, it will free the mdsc already.

Reported-by: syzbot+b57f46d8d6ea51960b8c@syzkaller.appspotmail.com
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Xiubo Li 2020-07-23 15:32:25 +08:00 committed by Greg Kroah-Hartman
parent 96de3dbf27
commit f831c6c95d
1 changed files with 2 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
fs/ceph/mds_client.c
View file

@ -3682,7 +3682,6 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
return -ENOMEM;
}
fsc->mdsc = mdsc;
init_completion(&mdsc->safe_umount_waiters);
init_waitqueue_head(&mdsc->session_close_wq);
INIT_LIST_HEAD(&mdsc->waiting_for_map);
@ -3723,6 +3722,8 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
strscpy(mdsc->nodename, utsname()->nodename,
sizeof(mdsc->nodename));
fsc->mdsc = mdsc;
return 0;
}