From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f174.google.com (mail-pd0-f174.google.com [209.85.192.174]) by kanga.kvack.org (Postfix) with ESMTP id C984A6B0035 for ; Mon, 21 Jul 2014 20:42:58 -0400 (EDT) Received: by mail-pd0-f174.google.com with SMTP id fp1so10089854pdb.19 for ; Mon, 21 Jul 2014 17:42:58 -0700 (PDT) Received: from mga01.intel.com (mga01.intel.com. [192.55.52.88]) by mx.google.com with ESMTP id 1si7927438pdf.411.2014.07.21.17.42.57 for ; Mon, 21 Jul 2014 17:42:57 -0700 (PDT) From: "Zhang, Tianfei" Subject: RE: [PATCH v7 05/10] x86, mpx: extend siginfo structure to include bound violation information 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> Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: 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" > -----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 b= ound > violation information >=20 > 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. >=20 > Signed-off-by: Qiaowei Ren > --- > include/uapi/asm-generic/siginfo.h | 9 ++++++++- > kernel/signal.c | 4 ++++ > 2 files changed, 12 insertions(+), 1 deletions(-) >=20 > 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; >=20 > /* 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 >=20 > /* > * SIGBUS si_codes > diff --git a/kernel/signal.c b/kernel/signal.c index a4077e9..2131636 100= 644 > --- 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 =3D=3D BUS_MCEERR_AR || from->si_code =3D=3D > BUS_MCEERR_AO) > err |=3D __put_user(from->si_addr_lsb, &to->si_addr_lsb); #endif > +#ifdef SEGV_BNDERR > + err |=3D __put_user(from->si_lower, &to->si_lower); > + err |=3D __put_user(from->si_upper, &to->si_upper); #endif "#endif" should be in a new line. > break; > case __SI_CHLD: > err |=3D __put_user(from->si_pid, &to->si_pid); > -- > 1.7.1 >=20 > -- > 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, 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