Ming Lei bb2b0051d7 sysfs: check if one entry has been removed before freeing ... It might be a kernel disaster if one sysfs entry is freed but still referenced by sysfs tree. Recently Dave and Sasha reported one use-after-free problem on sysfs entry, and the problem has been troubleshooted with help of debug message added in this patch. Given sysfs_get_dirent/sysfs_put are exported APIs, even inside sysfs they are called in many contexts(kobject/attribe add/delete, inode init/drop, dentry lookup/release, readdir, ...), it is healthful to check the removed flag before freeing one entry and dump message if it is freeing without being removed first. Cc: Dave Jones <davej@redhat.com> Cc: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Ming Lei <ming.lei@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2013-04-05 15:35:52 -07:00
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bin.c
dir.c	sysfs: check if one entry has been removed before freeing	2013-04-05 15:35:52 -07:00
file.c
group.c
inode.c
Kconfig
Makefile
mount.c	userns: Restrict when proc and sysfs can be mounted	2013-03-27 07:50:08 -07:00
symlink.c
sysfs.h