From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:33788 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965283AbeGAQ0G (ORCPT ); Sun, 1 Jul 2018 12:26:06 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org, "Eric W. Biederman" Subject: [PATCH 4.9 009/101] signal/xtensa: Consistenly use SIGBUS in do_unaligned_user Date: Sun, 1 Jul 2018 18:20:55 +0200 Message-Id: <20180701160757.514976203@linuxfoundation.org> In-Reply-To: <20180701160757.138608453@linuxfoundation.org> References: <20180701160757.138608453@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eric W. Biederman commit 7de712ccc096b81d23cc0a941cd9b8cb3956605d upstream. While working on changing this code to use force_sig_fault I discovered that do_unaliged_user is sets si_signo to SIGBUS and passes SIGSEGV to force_sig_info. Which is just b0rked. The code is reporting a SIGBUS error so replace the SIGSEGV with SIGBUS. Cc: Chris Zankel Cc: Max Filippov Cc: linux-xtensa@linux-xtensa.org Cc: stable@vger.kernel.org Acked-by: Max Filippov Fixes: 5a0015d62668 ("[PATCH] xtensa: Architecture support for Tensilica Xtensa Part 3") Signed-off-by: "Eric W. Biederman" Signed-off-by: Greg Kroah-Hartman --- arch/xtensa/kernel/traps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -334,7 +334,7 @@ do_unaligned_user (struct pt_regs *regs) info.si_errno = 0; info.si_code = BUS_ADRALN; info.si_addr = (void *) regs->excvaddr; - force_sig_info(SIGSEGV, &info, current); + force_sig_info(SIGBUS, &info, current); } #endif