Eric W. Biederman e51db73532 userns: Better restrictions on when proc and sysfs can be mounted ... Rely on the fact that another flavor of the filesystem is already mounted and do not rely on state in the user namespace. Verify that the mounted filesystem is not covered in any significant way. I would love to verify that the previously mounted filesystem has no mounts on top but there are at least the directories /proc/sys/fs/binfmt_misc and /sys/fs/cgroup/ that exist explicitly for other filesystems to mount on top of. Refactor the test into a function named fs_fully_visible and call that function from the mount routines of proc and sysfs. This makes this test local to the filesystems involved and the results current of when the mounts take place, removing a weird threading of the user namespace, the mount namespace and the filesystems themselves. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>		2013-08-26 19:17:03 -07:00
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array.c	kthread: Prevent unpark race which puts threads on the wrong cpu	2013-04-12 14:18:43 +02:00
base.c	proc_fill_cache(): clean up, get rid of pointless find_inode_number() use	2013-06-29 12:57:19 +04:00
cmdline.c
consoles.c
cpuinfo.c
devices.c
fd.c	proc_fill_cache(): just make instantiate_t return int	2013-06-29 12:57:18 +04:00
fd.h	proc: Move proc_fd() to fs/proc/fd.h	2013-05-01 17:29:39 -04:00
generic.c	[readdir] convert procfs	2013-06-29 12:56:32 +04:00
inode.c	proc: Split the namespace stuff out into linux/proc_ns.h	2013-05-01 17:29:39 -04:00
internal.h	proc_fill_cache(): just make instantiate_t return int	2013-06-29 12:57:18 +04:00
interrupts.c
Kconfig
kcore.c	fs/proc/kcore.c: using strlcpy() instead of strncpy()	2013-07-03 16:08:02 -07:00
kmsg.c	kmsg: honor dmesg_restrict sysctl on /dev/kmsg	2013-06-12 16:29:44 -07:00
loadavg.c
Makefile	mm, vmalloc: move get_vmalloc_info() to vmalloc.c	2013-04-29 15:54:33 -07:00
meminfo.c	mm, vmalloc: move get_vmalloc_info() to vmalloc.c	2013-04-29 15:54:33 -07:00
namespaces.c	proc_fill_cache(): just make instantiate_t return int	2013-06-29 12:57:18 +04:00
nommu.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
page.c	kpageflags: fix wrong KPF_THP on non-huge compound pages	2012-10-09 16:23:00 +09:00
proc_devtree.c	proc_devtree: Replace include linux/module.h with linux/export.h	2013-05-04 15:31:01 -04:00
proc_net.c	[readdir] convert procfs	2013-06-29 12:56:32 +04:00
proc_sysctl.c	Don't pass inode to ->d_hash() and ->d_compare()	2013-06-29 12:57:36 +04:00
proc_tty.c
root.c	userns: Better restrictions on when proc and sysfs can be mounted	2013-08-26 19:17:03 -07:00
self.c	Include missing linux/slab.h inclusions	2013-04-29 15:42:01 -04:00
softirqs.c
stat.c	stat: Use size_t for sizes instead of unsigned	2013-02-01 12:32:08 +02:00
task_mmu.c	pagemap: prepare to reuse constant bits with page-shift	2013-07-03 16:07:26 -07:00
task_nommu.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
uptime.c	fs/proc/uptime.c:uptime_proc_show(): use get_monotonic_boottime()	2013-07-03 16:08:02 -07:00
version.c
vmcore.c	vmcore: support mmap() on /proc/vmcore	2013-07-03 16:07:30 -07:00