Skip to main content

Browse the archive

Revision b23ff0e9330e4b11e18af984d50573598e10e7f9 authored by Mahesh Salgaonkar on 21 January 2010, 12:55:16 UTC, committed by Frederic Weisbecker on 28 January 2010, 13:15:51 UTC 
hw_breakpoints: Release the bp slot if arch_validate_hwbkpt_settings() fails.
 
On a given architecture, when hardware breakpoint registration fails
due to un-supported access type (read/write/execute), we lose the bp
slot since register_perf_hw_breakpoint() does not release the bp slot
on failure.
Hence, any subsequent hardware breakpoint registration starts failing
with 'no space left on device' error.

This patch introduces error handling in register_perf_hw_breakpoint()
function and releases bp slot on error.

Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: K. Prasad <prasad@linux.vnet.ibm.com>
Cc: Maneesh Soni <maneesh@in.ibm.com>
LKML-Reference: <20100121125516.GA32521@in.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
1 parent 7f5102c
Raw File
SELinux.txt 
If you want to use SELinux, chances are you will want
to use the distro-provided policies, or install the
latest reference policy release from
	http://oss.tresys.com/projects/refpolicy

However, if you want to install a dummy policy for
testing, you can do using 'mdp' provided under
scripts/selinux.  Note that this requires the selinux
userspace to be installed - in particular you will
need checkpolicy to compile a kernel, and setfiles and
fixfiles to label the filesystem.

	1. Compile the kernel with selinux enabled.
	2. Type 'make' to compile mdp.
	3. Make sure that you are not running with
	   SELinux enabled and a real policy.  If
	   you are, reboot with selinux disabled
	   before continuing.
	4. Run install_policy.sh:
		cd scripts/selinux
		sh install_policy.sh

Step 4 will create a new dummy policy valid for your
kernel, with a single selinux user, role, and type.
It will compile the policy, will set your SELINUXTYPE to
dummy in /etc/selinux/config, install the compiled policy
as 'dummy', and relabel your filesystem.
back to top