[3.13.y-ckt stable] Patch "parisc: Fix __ARCH_SI_PREAMBLE_SIZE" has been added to the 3.13.y-ckt tree
Kamal Mostafa
kamal at canonical.com
Tue Feb 2 00:36:00 UTC 2016
This is a note to let you know that I have just added a patch titled
parisc: Fix __ARCH_SI_PREAMBLE_SIZE
to the linux-3.13.y-queue branch of the 3.13.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.13.y-queue
This patch is scheduled to be released in version 3.13.11-ckt34.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.13.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
---8<------------------------------------------------------------
>From 0db8936022fe096cbc5e3f6a4756a009b71eb9e4 Mon Sep 17 00:00:00 2001
From: Helge Deller <deller at gmx.de>
Date: Sun, 10 Jan 2016 09:30:42 +0100
Subject: parisc: Fix __ARCH_SI_PREAMBLE_SIZE
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 at gmx.de>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
arch/parisc/include/uapi/asm/siginfo.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/parisc/include/uapi/asm/siginfo.h b/arch/parisc/include/uapi/asm/siginfo.h
index d703472..1c75565 100644
--- 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
--
1.9.1
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