From a313f4c55d4952f2105fe33a4957ed858e998359 Mon Sep 17 00:00:00 2001
From: Will Deacon <will.deacon@arm.com>
Date: Tue, 8 Nov 2011 04:51:19 +0000
Subject: [PATCH] powerpc/signal32: Fix sigset_t conversion when copying to
user
On PPC64, put_sigset_t converts a sigset_t to a compat_sigset_t
before copying it to userspace. There is a typo in the case that
we have 4 words to copy, meaning that we corrupt the compat_sigset_t.
It appears that _NSIG_WORDS can't be greater than 2 at the moment
so this code is probably always optimised away anyway.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/kernel/signal_32.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 78b76dc54dfb2..836a5a19eb2c3 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -97,7 +97,7 @@ static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set)
compat_sigset_t cset;
switch (_NSIG_WORDS) {
- case 4: cset.sig[5] = set->sig[3] & 0xffffffffull;
+ case 4: cset.sig[6] = set->sig[3] & 0xffffffffull;
cset.sig[7] = set->sig[3] >> 32;
case 3: cset.sig[4] = set->sig[2] & 0xffffffffull;
cset.sig[5] = set->sig[2] >> 32;
--
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