From a313f4c55d4952f2105fe33a4957ed858e998359 Mon Sep 17 00:00:00 2001 From: Will Deacon 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 Signed-off-by: Benjamin Herrenschmidt --- 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 78b76dc54df..836a5a19eb2 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; -- 2.39.2