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From: tip-bot for Joerg Roedel <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: luto@kernel.org, jroedel@suse.de, linux-kernel@vger.kernel.org,
	brgerst@gmail.com, 0x7f454c46@gmail.com, peterz@infradead.org,
	bp@alien8.de, bp@suse.de, hpa@zytor.com, dvlasenk@redhat.com,
	tglx@linutronix.de, dave.hansen@linux.intel.com,
	jpoimboe@redhat.com, mingo@kernel.org,
	torvalds@linux-foundation.org
Subject: [tip:x86/urgent] x86/signals: Fix lower/upper bound reporting in compat siginfo
Date: Wed, 5 Apr 2017 01:58:21 -0700	[thread overview]
Message-ID: <tip-cfac6dfa42bddfa9711b20d486e521d1a41ab09f@git.kernel.org> (raw)
In-Reply-To: <1491322501-5054-1-git-send-email-joro@8bytes.org>

Commit-ID:  cfac6dfa42bddfa9711b20d486e521d1a41ab09f
Gitweb:     http://git.kernel.org/tip/cfac6dfa42bddfa9711b20d486e521d1a41ab09f
Author:     Joerg Roedel <jroedel@suse.de>
AuthorDate: Tue, 4 Apr 2017 18:15:01 +0200
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Wed, 5 Apr 2017 10:16:43 +0200

x86/signals: Fix lower/upper bound reporting in compat siginfo

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

This fixes the 32-bit MPX "tabletest" testcase on 64-bit kernels.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.8+
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: a4455082dc6f0 ('x86/signals: Add missing signal_compat code for x86 features')
Link: http://lkml.kernel.org/r/1491322501-5054-1-git-send-email-joro@8bytes.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 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);
 					}

      parent reply	other threads:[~2017-04-05  9:04 UTC|newest]

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

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