Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751554AbaGVAm7 (ORCPT ); Mon, 21 Jul 2014 20:42:59 -0400 Received: from mga14.intel.com ([192.55.52.115]:25563 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750837AbaGVAm6 convert rfc822-to-8bit (ORCPT ); Mon, 21 Jul 2014 20:42:58 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,705,1400050800"; d="scan'208";a="565200337" From: "Zhang, Tianfei" To: "Ren, Qiaowei" , "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , "Hansen, Dave" CC: "x86@kernel.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "Ren, Qiaowei" Subject: RE: [PATCH v7 05/10] x86, mpx: extend siginfo structure to include bound violation information Thread-Topic: [PATCH v7 05/10] x86, mpx: extend siginfo structure to include bound violation information Thread-Index: AQHPpKamt4H7mx4sM0e/jI/UmwAjL5urQiZQ Date: Tue, 22 Jul 2014 00:42:53 +0000 Message-ID: References: <1405921124-4230-1-git-send-email-qiaowei.ren@intel.com> <1405921124-4230-6-git-send-email-qiaowei.ren@intel.com> In-Reply-To: <1405921124-4230-6-git-send-email-qiaowei.ren@intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.17.6.105] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: owner-linux-mm@kvack.org [mailto:owner-linux-mm@kvack.org] On > Behalf Of Qiaowei Ren > Sent: Monday, July 21, 2014 1:39 PM > To: H. Peter Anvin; Thomas Gleixner; Ingo Molnar; Hansen, Dave > Cc: x86@kernel.org; linux-kernel@vger.kernel.org; linux-mm@kvack.org; Ren, > Qiaowei > Subject: [PATCH v7 05/10] x86, mpx: extend siginfo structure to include bound > violation information > > This patch adds new fields about bound violation into siginfo structure. > si_lower and si_upper are respectively lower bound and upper bound when > bound violation is caused. > > Signed-off-by: Qiaowei Ren > --- > include/uapi/asm-generic/siginfo.h | 9 ++++++++- > kernel/signal.c | 4 ++++ > 2 files changed, 12 insertions(+), 1 deletions(-) > > diff --git a/include/uapi/asm-generic/siginfo.h > b/include/uapi/asm-generic/siginfo.h > index ba5be7f..1e35520 100644 > --- a/include/uapi/asm-generic/siginfo.h > +++ b/include/uapi/asm-generic/siginfo.h > @@ -91,6 +91,10 @@ typedef struct siginfo { > int _trapno; /* TRAP # which caused the signal */ > #endif > short _addr_lsb; /* LSB of the reported address */ > + struct { > + void __user *_lower; > + void __user *_upper; > + } _addr_bnd; > } _sigfault; > > /* SIGPOLL */ > @@ -131,6 +135,8 @@ typedef struct siginfo { > #define si_trapno _sifields._sigfault._trapno > #endif > #define si_addr_lsb _sifields._sigfault._addr_lsb > +#define si_lower _sifields._sigfault._addr_bnd._lower > +#define si_upper _sifields._sigfault._addr_bnd._upper > #define si_band _sifields._sigpoll._band > #define si_fd _sifields._sigpoll._fd > #ifdef __ARCH_SIGSYS > @@ -199,7 +205,8 @@ typedef struct siginfo { > */ > #define SEGV_MAPERR (__SI_FAULT|1) /* address not mapped to object > */ > #define SEGV_ACCERR (__SI_FAULT|2) /* invalid permissions for mapped > object */ > -#define NSIGSEGV 2 > +#define SEGV_BNDERR (__SI_FAULT|3) /* failed address bound checks */ > +#define NSIGSEGV 3 > > /* > * SIGBUS si_codes > diff --git a/kernel/signal.c b/kernel/signal.c index a4077e9..2131636 100644 > --- a/kernel/signal.c > +++ b/kernel/signal.c > @@ -2748,6 +2748,10 @@ int copy_siginfo_to_user(siginfo_t __user *to, > const siginfo_t *from) > if (from->si_code == BUS_MCEERR_AR || from->si_code == > BUS_MCEERR_AO) > err |= __put_user(from->si_addr_lsb, &to->si_addr_lsb); #endif > +#ifdef SEGV_BNDERR > + err |= __put_user(from->si_lower, &to->si_lower); > + err |= __put_user(from->si_upper, &to->si_upper); #endif "#endif" should be in a new line. > break; > case __SI_CHLD: > err |= __put_user(from->si_pid, &to->si_pid); > -- > 1.7.1 > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to > majordomo@kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: email@kvack.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/