- make-reading-proc-sys-kernel-cap-bould-not-require.patch removed from -mm tree

- make-reading-proc-sys-kernel-cap-bould-not-require.patch removed from -mm tree

[akpm]

The patch titled
     make reading /proc/sys/kernel/cap-bould not require CAP_SYS_MODULE
has been removed from the -mm tree.  Its filename was
     make-reading-proc-sys-kernel-cap-bould-not-require.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
Subject: make reading /proc/sys/kernel/cap-bould not require CAP_SYS_MODULE
From: Eric Paris <eparis@redhat.com>

Reading /proc/sys/kernel/cap-bound requires CAP_SYS_MODULE.  (see
proc_dointvec_bset in kernel/sysctl.c)

sysctl appears to drive all over proc reading everything it can get it's
hands on and is complaining when it is being denied access to read
cap-bound.  Clearly writing to cap-bound should be a sensitive operation
but requiring CAP_SYS_MODULE to read cap-bound seems a bit to strong.  I
believe the information could with reasonable certainty be obtained by
looking at a bunch of the output of /proc/pid/status which has very low
security protection, so at best we are just getting a little obfuscation of
information.

Currently SELinux policy has to 'dontaudit' capability checks for
CAP_SYS_MODULE for things like sysctl which just want to read cap-bound. 
In doing so we also as a byproduct have to hide warnings of potential
exploits such as if at some time that sysctl actually tried to load a
module.  I wondered if anyone would have a problem opening cap-bound up to
read from anyone?

Acked-by: Chris Wright <chrisw@sous-sol.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/sysctl.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN kernel/sysctl.c~make-reading-proc-sys-kernel-cap-bould-not-require kernel/sysctl.c
--- a/kernel/sysctl.c~make-reading-proc-sys-kernel-cap-bould-not-require
+++ a/kernel/sysctl.c
@@ -1961,7 +1961,7 @@ int proc_dointvec_bset(ctl_table *table,
 {
 	int op;
 
-	if (!capable(CAP_SYS_MODULE)) {
+	if (write && !capable(CAP_SYS_MODULE)) {
 		return -EPERM;
 	}
 
_

Patches currently in -mm which might be from eparis@redhat.com are

origin.patch