This is a note to let you know that I've just added the patch titled
parisc: Fix __ARCH_SI_PREAMBLE_SIZE
to the 4.4-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-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e60fc5aa608eb38b47ba4ee058f306f739eb70a0 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller@xxxxxx>
Date: Sun, 10 Jan 2016 09:30:42 +0100
Subject: parisc: Fix __ARCH_SI_PREAMBLE_SIZE
From: Helge Deller <deller@xxxxxx>
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@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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@xxxxxx are
queue-4.4/parisc-protect-huge-page-pte-changes-with-spinlocks.patch
queue-4.4/parisc-fix-__arch_si_preamble_size.patch
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