fs: pstore: Replaced calls to kmalloc and memcpy with kmemdup

Replaced calls to kmalloc and memcpy with a single call to kmemdup.
This patch was found using coccicheck.

Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
EDAC, mc_sysfs.c: Fix string array pointer types

Those should be const ptr to a const string, fix them.

Signed-off-by: Borislav Petkov <bp@suse.de>
NVMe: Add discard support for capable devices

This adds discard support to block queues if the nvme device is capable of
deallocating blocks as indicated by the controller's optional command support.
A discard flagged bio request will submit an NVMe deallocate Data Set
Management command for the requested blocks.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
NVMe: Rename nvme.c to nvme-core.c

In preparation for adding nvme-scsi.c
It is preferable to retain the module name 'nvme'

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
NVMe: Move structures & definitions to header file

nvme-scsi.c uses several data structures and definitions that were
previously private to nvme-core.c.  Move the definitions to nvme.h,
protected by __KERNEL__.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
NVMe: Add definitions for format command

The SCSI emulation has the ability to send format commands, so we need
to add the definition of the command.  Also add a missing error code.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
NVMe: Add nvme-scsi.c

Translates SCSI commands in SG_IO ioctl to NVMe commands.
Uses the scsi-nvme translation spec from nvmexpress.org as reference.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
hwspinlock/omap: support OMAP5 as well

OMAP5 has spinlocks, too.

Signed-off-by: Vincent Stehlé <v-stehle@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
audit: improve GID/EGID comparation logic

It is useful to extend GID/EGID comparation logic to be able to
match not only the exact EID/EGID values but the group/egroup also.

Signed-off-by: Matvejchikov Ilya <matvejchikov@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: refactor hold queue flush

The hold queue flush code is an autonomous chunk of code that can be
refactored, removed from kauditd_thread() into flush_hold_queue() and
flattenned for better legibility.

Signed-off-by: Richard Guy Briggs <rbriggs@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: flatten kauditd_thread wait queue code

The wait queue control code in kauditd_thread() was nested deeper than
necessary.  The function has been flattened for better legibility.

Signed-off-by: Richard Guy Briggs <rbriggs@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: move kaudit thread start from auditd registration to kaudit init

The kauditd_thread() task was started only after the auditd userspace daemon
registers itself with kaudit.  This was fine when only auditd consumed messages
from the kaudit netlink unicast socket.  With the addition of a multicast group
to that socket it is more convenient to have the thread start on init of the
kaudit kernel subsystem.

Signed-off-by: Richard Guy Briggs <rbriggs@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: Syscall rules are not applied to existing processes on non-x86

Commit b05d8447e782 (audit: inline audit_syscall_entry to reduce
burden on archs) changed audit_syscall_entry to check for a dummy
context before calling __audit_syscall_entry. Unfortunately the dummy
context state is maintained in __audit_syscall_entry so once set it
never gets cleared, even if the audit rules change.

As a result, if there are no auditing rules when a process starts
then it will never be subject to any rules added later. x86 doesn't
see this because it has an assembly fast path that calls directly into
__audit_syscall_entry.

I noticed this issue when working on audit performance optimisations.
I wrote a set of simple test cases available at:

http://ozlabs.org/~anton/junkcode/audit_tests.tar.gz

02_new_rule.py fails without the patch and passes with it. The
test case clears all rules, starts a process, adds a rule then
verifies the process produces a syscall audit record.

Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: <stable@kernel.org> # 3.3+
Signed-off-by: Eric Paris <eparis@redhat.com>
powerpc: Remove static branch prediction in 64bit traced syscall path

Some distros enable auditing by default which forces us through the
syscall trace path. Remove the static branch prediction in our 64bit
syscall handler and let the hardware do the prediction.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: destroy long filenames correctly

filename should be destroyed via final_putname() instead of __putname()
Otherwise this result in following BUGON() in case of long names:
  kernel BUG at mm/slab.c:3006!
  Call Trace:
  kmem_cache_free+0x1c1/0x850
  audit_putname+0x88/0x90
  putname+0x73/0x80
  sys_symlinkat+0x120/0x150
  sys_symlink+0x16/0x20
  system_call_fastpath+0x16/0x1b

Introduced-in: 7950e3852

Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
kernel: audit: beautify code, for extern function, better to check its parameters by itself

  __audit_socketcall is an extern function.
  better to check its parameters by itself.

    also can return error code, when fail (find invalid parameters).
    also use macro instead of real hard code number
    also give related comments for it.

Signed-off-by: Chen Gang <gang.chen@asianux.com>
[eparis: fix the return value when !CONFIG_AUDIT]
Signed-off-by: Eric Paris <eparis@redhat.com>
auditsc: Use kzalloc instead of kmalloc+memset.

  In function audit_alloc_context(), use kzalloc, instead of kmalloc+memset. Patch also renames audit_zero_context() to
audit_set_context(), to represent it's inner workings properly.

Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
auditsc: remove audit_set_context() altogether - fold it into its caller

>   In function audit_alloc_context(), use kzalloc, instead of kmalloc+memset. Patch also renames audit_zero_context() to
> audit_set_context(), to represent it's inner workings properly.

Fair enough.  I'd go futher...

Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Eric Paris <eparis@redhat.com>
Cc: Rakib Mullick <rakib.mullick@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Eric Paris <eparis@redhat.com>
audit: use data= not msg= for AUDIT_USER_TTY messages

Userspace parsing libraries assume that msg= is only for userspace audit
records, not for user tty records.  Make this consistent with the other
tty records.

Reported-by: Steve Grubb <sgrubb@redhat.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
Audit: do not print error when LSMs disabled

RHBZ: 785936

If the audit system collects a record about one process sending a signal
to another process it includes in that collection the 'secid' or 'an int
used to represet an LSM label.'  If there is no LSM enabled it will
collect a 0.  The problem is that when we attempt to print that record
we ask the LSM to convert the secid back to a string.  Since there is no
LSM it returns EOPNOTSUPP.

Most code in the audit system checks if the secid is 0 and does not
print LSM info in that case.  The signal information code however forgot
that check.  Thus users will see a message in syslog indicating that
converting the sid to string failed.  Add the right check.

Signed-off-by: Eric Paris <eparis@redhat.com>