capabilities: add (back) dummy support for KEEPCAPS
commit8cdbc2b9826b3543fecff2f6d6400fa77b21ffdd
authorAndrew G. Morgan <morgan@kernel.org>
Thu, 12 Jun 2008 22:21:33 +0000 (12 15:21 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 13 Jun 2008 01:05:40 +0000 (12 18:05 -0700)
treee42ddc9142988fffb2b4128e2d94b3913914dbe6
parent57d3c64fd8130ebdacd85a36c9656ba5e221f3a3
capabilities: add (back) dummy support for KEEPCAPS

The dummy module is used by folk that run security conscious code(!?).  A
feature of such code (for example, dhclient) is that it tries to operate
with minimum privilege (dropping unneeded capabilities).  While the dummy
module doesn't restrict code execution based on capability state, the user
code expects the kernel to appear to support it.  This patch adds back
faked support for the PR_SET_KEEPCAPS etc., calls - making the kernel
behave as before 2.6.26.

For details see: http://bugzilla.kernel.org/show_bug.cgi?id=10748

Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: James Morris <jmorris@namei.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
security/dummy.c