Patch "parisc: Fix __ARCH_SI_PREAMBLE_SIZE" has been added to the 3.14-stable tree

Patch "parisc: Fix __ARCH_SI_PREAMBLE_SIZE" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    parisc: Fix __ARCH_SI_PREAMBLE_SIZE

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     parisc-fix-__arch_si_preamble_size.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From e60fc5aa608eb38b47ba4ee058f306f739eb70a0 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@gmx.de>
Date: Sun, 10 Jan 2016 09:30:42 +0100
Subject: parisc: Fix __ARCH_SI_PREAMBLE_SIZE

From: Helge Deller <deller@gmx.de>

commit e60fc5aa608eb38b47ba4ee058f306f739eb70a0 upstream.

On a 64bit kernel build the compiler aligns the _sifields union in the
struct siginfo_t on a 64bit address. The __ARCH_SI_PREAMBLE_SIZE define
compensates for this alignment and thus fixes the wait testcase of the
strace package.

The symptoms of a wrong __ARCH_SI_PREAMBLE_SIZE value is that
_sigchld.si_stime variable is missed to be copied and thus after a
copy_siginfo() will have uninitialized values.

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/parisc/include/uapi/asm/siginfo.h |    4 ++++
 1 file changed, 4 insertions(+)

--- a/arch/parisc/include/uapi/asm/siginfo.h
+++ b/arch/parisc/include/uapi/asm/siginfo.h
@@ -1,6 +1,10 @@
 #ifndef _PARISC_SIGINFO_H
 #define _PARISC_SIGINFO_H
 
+#if defined(__LP64__)
+#define __ARCH_SI_PREAMBLE_SIZE   (4 * sizeof(int))
+#endif
+
 #include <asm-generic/siginfo.h>
 
 #undef NSIGTRAP


Patches currently in stable-queue which might be from deller@gmx.de are

queue-3.14/parisc-drop-unused-madv_xxxk_pages-flags-from-asm-mman.h.patch
queue-3.14/parisc-fix-syscall-restarts.patch
queue-3.14/parisc-fix-__arch_si_preamble_size.patch