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parisc: Fix __ARCH_SI_PREAMBLE_SIZE

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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>
Cc: stable@vger.kernel.org
This commit is contained in:
Helge Deller
2016-01-10 09:30:42 +01:00
parent fc63257503
commit e60fc5aa60
1 changed files with 4 additions and 0 deletions
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4
arch/parisc/include/uapi/asm/siginfo.h
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@@ -1,6 +1,10 @@
#ifndef _PARISC_SIGINFO_H #ifndef _PARISC_SIGINFO_H
#define _PARISC_SIGINFO_H #define _PARISC_SIGINFO_H
#if defined(__LP64__)
#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
#endif
#include <asm-generic/siginfo.h> #include <asm-generic/siginfo.h>
#undef NSIGTRAP #undef NSIGTRAP