lkml.org 
[lkml]   [2016]   [Feb]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Date
Subject[PATCH 3.2 45/87] parisc: Fix __ARCH_SI_PREAMBLE_SIZE
3.2.77-rc1 review patch.  If anyone has any objections, please let me know.

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

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>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
arch/parisc/include/asm/siginfo.h | 4 ++++
1 file changed, 4 insertions(+)

--- a/arch/parisc/include/asm/siginfo.h
+++ b/arch/parisc/include/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
\
 
 \ /
  Last update: 2016-02-09 01:21    [W:0.294 / U:0.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site