4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: David Howells <dhowe...@redhat.com>

commit 20f06ed9f61a185c6dabd662c310bed6189470df upstream.

MIPS64 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 <smuel...@chronox.de>
Signed-off-by: David Howells <dhowe...@redhat.com>
Cc: linux-m...@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-security-mod...@vger.kernel.org
Cc: keyri...@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13832/
Signed-off-by: Ralf Baechle <r...@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 arch/mips/kernel/scall64-n32.S |    2 +-
 arch/mips/kernel/scall64-o32.S |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -344,7 +344,7 @@ EXPORT(sysn32_call_table)
        PTR     sys_ni_syscall                  /* available, was setaltroot */
        PTR     sys_add_key
        PTR     sys_request_key
-       PTR     sys_keyctl                      /* 6245 */
+       PTR     compat_sys_keyctl               /* 6245 */
        PTR     sys_set_thread_area
        PTR     sys_inotify_init
        PTR     sys_inotify_add_watch
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -500,7 +500,7 @@ EXPORT(sys32_call_table)
        PTR     sys_ni_syscall                  /* available, was setaltroot */
        PTR     sys_add_key                     /* 4280 */
        PTR     sys_request_key
-       PTR     sys_keyctl
+       PTR     compat_sys_keyctl
        PTR     sys_set_thread_area
        PTR     sys_inotify_init
        PTR     sys_inotify_add_watch           /* 4285 */


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