Amir Goldstein f785f33c23 ovl: relax WARN_ON() on rename to self ... commit 6889ee5a53 upstream. In ovl_rename(), if new upper is hardlinked to old upper underneath overlayfs before upper dirs are locked, user will get an ESTALE error and a WARN_ON will be printed. Changes to underlying layers while overlayfs is mounted may result in unexpected behavior, but it shouldn't crash the kernel and it shouldn't trigger WARN_ON() either, so relax this WARN_ON(). Reported-by: syzbot+bb1836a212e69f8e201a@syzkaller.appspotmail.com Fixes: 804032fabb ("ovl: don't check rename to self") Cc: <stable@vger.kernel.org> # v4.9+ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2019-12-17 20:34:51 +01:00
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copy_up.c	ovl: fix missing upper fs freeze protection on copy up for ioctl	2019-05-25 18:23:30 +02:00
dir.c	ovl: relax WARN_ON() on rename to self	2019-12-17 20:34:51 +01:00
export.c	ovl: Fix dereferencing possible ERR_PTR()	2019-10-05 13:10:08 +02:00
file.c	ovl: fix wrong flags check in FS_IOC_FS[SG]ETXATTR ioctls	2019-06-25 11:35:52 +08:00
inode.c	ovl: fix corner case of non-unique st_dev;st_ino	2019-12-17 20:34:51 +01:00
Kconfig	ovl: Provide a mount option metacopy=on/off for metadata copyup	2018-07-20 09:56:06 +02:00
Makefile	ovl: stack file ops	2018-07-18 15:44:41 +02:00
namei.c	ovl: detect overlapping layers	2019-06-25 11:35:52 +08:00
overlayfs.h	ovl: detect overlapping layers	2019-06-25 11:35:52 +08:00
ovl_entry.h	ovl: fix regression caused by overlapping layers detection	2019-09-21 07:17:14 +02:00
readdir.c	ovl: fix wrong use of impure dir cache in ovl_iterate()	2018-07-17 16:04:34 +02:00
super.c	ovl: fix regression caused by overlapping layers detection	2019-09-21 07:17:14 +02:00
util.c	ovl: detect overlapping layers	2019-06-25 11:35:52 +08:00