Ondrej Mosnacek 1537ad15c9 kernfs: fix xattr name handling in LSM helpers ... The implementation of kernfs_security_xattr_*() helpers reuses the kernfs_node_xattr_*() functions, which take the suffix of the xattr name and extract full xattr name from it using xattr_full_name(). However, this function relies on the fact that the suffix passed to xattr handlers from VFS is always constructed from the full name by just incerementing the pointer. This doesn't necessarily hold for the callers of kernfs_security_xattr_*(), so their usage will easily lead to out-of-bounds access. Fix this by moving the xattr name reconstruction to the VFS xattr handlers and replacing the kernfs_security_xattr_*() helpers with more general kernfs_xattr_*() helpers that take full xattr name and allow accessing all kernfs node's xattrs. Reported-by: kernel test robot <rong.a.chen@intel.com> Fixes: b230d5aba2 ("LSM: add new hook for kernfs node initialization") Fixes: ec882da5cd ("selinux: implement the kernfs_init_security hook") Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com> Signed-off-by: Paul Moore <paul@paul-moore.com>		2019-04-04 09:00:27 -04:00
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dir.c	kernfs: initialize security of newly created nodes	2019-03-20 22:10:15 -04:00
file.c	fs: kernfs: add poll file operation	2019-03-05 21:07:17 -08:00
inode.c	kernfs: fix xattr name handling in LSM helpers	2019-04-04 09:00:27 -04:00
Kconfig	kernfs: add CONFIG_KERNFS	2014-02-07 16:08:57 -08:00
kernfs-internal.h	kernfs: use simple_xattrs for security attributes	2019-03-20 21:54:33 -04:00
Makefile	sysfs, kernfs: add skeletons for kernfs	2013-11-27 13:28:24 -08:00
mount.c	Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-03-12 14:08:19 -07:00
symlink.c	kernfs: clean up struct kernfs_iattrs	2019-03-20 21:42:14 -04:00