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From: Joerg Roedel <joro@8bytes.org>
To: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org, Dmitry Safonov <0x7f454c46@gmail.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Joerg Roedel <jroedel@suse.de>,
	linux-kernel@vger.kernel.org, Borislav Petkov <bp@suse.de>
Subject: [PATCH] x86/signals: Fix lower/upper bound reporting in compat siginfo
Date: Tue,  4 Apr 2017 18:15:01 +0200	[thread overview]
Message-ID: <1491322501-5054-1-git-send-email-joro@8bytes.org> (raw)

From: Joerg Roedel <jroedel@suse.de>

Put the right values from the original siginfo into the
userspace compat-siginfo.

This fixes the 32-bit mpx tabletest on a 64-bit kernel.

Fixes: a4455082dc6f0 ('x86/signals: Add missing signal_compat code for x86 features')
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 arch/x86/kernel/signal_compat.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c
index ec1f756..71beb28 100644
--- a/arch/x86/kernel/signal_compat.c
+++ b/arch/x86/kernel/signal_compat.c
@@ -151,8 +151,8 @@ int __copy_siginfo_to_user32(compat_siginfo_t __user *to, const siginfo_t *from,
 
 				if (from->si_signo == SIGSEGV) {
 					if (from->si_code == SEGV_BNDERR) {
-						compat_uptr_t lower = (unsigned long)&to->si_lower;
-						compat_uptr_t upper = (unsigned long)&to->si_upper;
+						compat_uptr_t lower = (unsigned long)from->si_lower;
+						compat_uptr_t upper = (unsigned long)from->si_upper;
 						put_user_ex(lower, &to->si_lower);
 						put_user_ex(upper, &to->si_upper);
 					}
-- 
1.9.1

             reply	other threads:[~2017-04-04 16:15 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-04 16:15 Joerg Roedel [this message]
2017-04-04 16:56 ` [PATCH] x86/signals: Fix lower/upper bound reporting in compat siginfo Dave Hansen
2017-04-04 21:53   ` Joerg Roedel
2017-04-05 22:45     ` Dave Hansen
2017-04-05  8:58 ` [tip:x86/urgent] " tip-bot for Joerg Roedel

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