* [PATCH] parisc: Fix __ARCH_SI_PREAMBLE_SIZE on parisc
@ 2016-01-10 8:30 Helge Deller
0 siblings, 0 replies; only message in thread
From: Helge Deller @ 2016-01-10 8:30 UTC (permalink / raw)
To: linux-parisc, James Bottomley, John David Anglin
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
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
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2016-01-10 8:30 [PATCH] parisc: Fix __ARCH_SI_PREAMBLE_SIZE on parisc Helge Deller
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