linux-stable.git/arch/x86/entry/syscalls, branch linux-4.9.y

x86, pkeys: remove cruft from never-merged syscalls

2016-10-17T21:16:13+00:00

pkey_set() and pkey_get() were syscalls present in older versions
of the protection keys patches.  The syscall number definitions
were inadvertently left in place.  This patch removes them.

I did a git grep and verified that these are the last places in
the tree that these appear, save for the protection_keys.c tests
and Documentation.  Those spots talk about functions called
pkey_get/set() which are wrappers for the direct PKRU
instructions, not the syscalls.

Signed-off-by: Dave Hansen 
Cc: Thomas Gleixner 
Cc: linux-arch@vger.kernel.org
Cc: mgorman@techsingularity.net
Cc: arnd@arndb.de
Cc: linux-api@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: luto@kernel.org
Cc: akpm@linux-foundation.org
Fixes: f9afc6197e9bb ("x86: Wire up protection keys system calls")
Signed-off-by: Linus Torvalds

Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-10T18:01:51+00:00

Pull protection keys syscall interface from Thomas Gleixner:
 "This is the final step of Protection Keys support which adds the
  syscalls so user space can actually allocate keys and protect memory
  areas with them. Details and usage examples can be found in the
  documentation.

  The mm side of this has been acked by Mel"

* 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/pkeys: Update documentation
  x86/mm/pkeys: Do not skip PKRU register if debug registers are not used
  x86/pkeys: Fix pkeys build breakage for some non-x86 arches
  x86/pkeys: Add self-tests
  x86/pkeys: Allow configuration of init_pkru
  x86/pkeys: Default to a restrictive init PKRU
  pkeys: Add details of system call use to Documentation/
  generic syscalls: Wire up memory protection keys syscalls
  x86: Wire up protection keys system calls
  x86/pkeys: Allocation/free syscalls
  x86/pkeys: Make mprotect_key() mask off additional vm_flags
  mm: Implement new pkey_mprotect() system call
  x86/pkeys: Add fault handling for PF_PK page fault bit

x86/syscalls: Remove bash-isms in syscall table generator

2016-10-05T09:34:25+00:00

Signed-off-by: Sylvain BERTRAND 
Link: http://lkml.kernel.org/r/20160929162234.GA29592@freedom
Signed-off-by: Thomas Gleixner

x86: Wire up protection keys system calls

2016-09-09T11:02:27+00:00

This is all that we need to get the new system calls themselves
working on x86.

Signed-off-by: Dave Hansen 
Cc: linux-arch@vger.kernel.org
Cc: Dave Hansen 
Cc: mgorman@techsingularity.net
Cc: arnd@arndb.de
Cc: linux-api@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: luto@kernel.org
Cc: akpm@linux-foundation.org
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/20160729163017.E3C06FD2@viggo.jf.intel.com
Signed-off-by: Thomas Gleixner

x86/syscalls/64: Add compat_sys_keyctl for 32-bit userspace

2016-08-01T09:31:24+00:00

x86_64 needs to use compat_sys_keyctl for 32-bit userspace rather than
calling sys_keyctl(). The latter will work in a lot of cases, thereby
hiding the issue.

Reported-by: Stephan Mueller 
Tested-by: Stephan Mueller 
Signed-off-by: David Howells 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: keyrings@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/146961615805.14395.5581949237156769439.stgit@warthog.procyon.org.uk
Signed-off-by: Ingo Molnar

x86/syscalls: Add compat_sys_preadv64v2/compat_sys_pwritev64v2

2016-07-15T08:30:26+00:00

Don't use the same syscall numbers for 2 different syscalls:

 534	x32	preadv			compat_sys_preadv64
 535	x32	pwritev			compat_sys_pwritev64
 534	x32	preadv2			compat_sys_preadv2
 535	x32	pwritev2		compat_sys_pwritev2

Add compat_sys_preadv64v2() and compat_sys_pwritev64v2() so that 64-bit offset
is passed in one 64-bit register on x32, similar to compat_sys_preadv64()
and compat_sys_pwritev64().

Signed-off-by: H.J. Lu 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Christoph Hellwig 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/CAMe9rOovCMf-RQfx_n1U_Tu_DX1BYkjtFr%3DQ4-_PFVSj9BCzUA@mail.gmail.com
Signed-off-by: Ingo Molnar

x86/syscalls: Wire up compat readv2/writev2 syscalls

2016-04-13T08:31:26+00:00

Reported-by: David Smith 
Tested-by: David Smith 
Signed-off-by: Christoph Hellwig 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20160407204359.GA3720@lst.de
Signed-off-by: Ingo Molnar

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-03-20T01:52:29+00:00

Pull vfs updates from Al Viro:

 - Preparations of parallel lookups (the remaining main obstacle is the
   need to move security_d_instantiate(); once that becomes safe, the
   rest will be a matter of rather short series local to fs/*.c

 - preadv2/pwritev2 series from Christoph

 - assorted fixes

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (32 commits)
  splice: handle zero nr_pages in splice_to_pipe()
  vfs: show_vfsstat: do not ignore errors from show_devname method
  dcache.c: new helper: __d_add()
  don't bother with __d_instantiate(dentry, NULL)
  untangle fsnotify_d_instantiate() a bit
  uninline d_add()
  replace d_add_unique() with saner primitive
  quota: use lookup_one_len_unlocked()
  cifs_get_root(): use lookup_one_len_unlocked()
  nfs_lookup: don't bother with d_instantiate(dentry, NULL)
  kill dentry_unhash()
  ceph_fill_trace(): don't bother with d_instantiate(dn, NULL)
  autofs4: don't bother with d_instantiate(dentry, NULL) in ->lookup()
  configfs: move d_rehash() into configfs_create() for regular files
  ceph: don't bother with d_rehash() in splice_dentry()
  namei: teach lookup_slow() to skip revalidate
  namei: massage lookup_slow() to be usable by lookup_one_len_unlocked()
  lookup_one_len_unlocked(): use lookup_dcache()
  namei: simplify invalidation logics in lookup_dcache()
  namei: change calling conventions for lookup_{fast,slow} and follow_managed()
  ...

x86: wire up preadv2 and pwritev2

2016-03-04T17:20:10+00:00

Signed-off-by: Milosz Tanski 
[hch: rebased due to newly added syscalls]
Reviewed-by: Stephen Bates 
Tested-by: Stephen Bates 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Al Viro

x86/syscalls/64: Mark sys_iopl() as using ptregs

2016-02-01T07:53:25+00:00

sys_iopl() both reads and writes pt_regs->flags.  Mark it as using ptregs.

This isn't strictly necessary, as pt_regs->flags is available
even in the fast path, but this is very lightweight now that we
have syscall qualifiers and it could avoid some pain down the
road.

Reported-and-tested-by: Borislav Petkov 
Signed-off-by: Andy Lutomirski 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/3de0ca692fa8bf414c5e3d7afe3e6195d1a10e1f.1454261517.git.luto@kernel.org
Signed-off-by: Ingo Molnar