Mike Christie bc87baee19 configfs: fix registered group removal ... [ Upstream commit cc57c07343 ] This patch fixes a bug where configfs_register_group had added a group in a tree, and userspace has done a rmdir on a dir somewhere above that group and we hit a kernel crash. The problem is configfs_rmdir will detach everything under it and unlink groups on the default_groups list. It will not unlink groups added with configfs_register_group so when configfs_unregister_group is called to drop its references to the group/items we crash when we try to access the freed dentrys. The patch just adds a check for if a rmdir has been done above us and if so just does the unlink part of unregistration. Sorry if you are getting this multiple times. I thouhgt I sent this to some of you and lkml, but I do not see it. Signed-off-by: Mike Christie <mchristi@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-09-26 08:38:10 +02:00
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Kconfig	configfs: change depends -> select SYSFS	2011-01-16 21:22:29 +00:00
Makefile	[PATCH] configfs: User-driven configuration filesystem	2006-01-03 11:45:28 -08:00
configfs_internal.h	configfs: implement binary attributes	2016-01-04 12:31:46 +01:00
dir.c	configfs: fix registered group removal	2018-09-26 08:38:10 +02:00
file.c	Replace <asm/uaccess.h> with <linux/uaccess.h> globally	2016-12-24 11:46:01 -08:00
inode.c	fs: Replace current_fs_time() with current_time()	2016-09-27 21:06:22 -04:00
item.c	configfs: Introduce config_item_get_unless_zero()	2017-06-12 13:20:20 +02:00
mount.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
symlink.c	configfs: Fix race between create_link and configfs_rmdir	2017-06-12 13:20:10 +02:00