From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f49.google.com (mail-pa0-f49.google.com [209.85.220.49]) by kanga.kvack.org (Postfix) with ESMTP id 10B0A6B0044 for ; Thu, 11 Sep 2014 04:54:13 -0400 (EDT) Received: by mail-pa0-f49.google.com with SMTP id lf10so7457764pab.8 for ; Thu, 11 Sep 2014 01:54:12 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com. [192.55.52.115]) by mx.google.com with ESMTP id v3si274639pds.170.2014.09.11.01.54.11 for ; Thu, 11 Sep 2014 01:54:12 -0700 (PDT) From: Qiaowei Ren Subject: [PATCH v8 05/10] x86, mpx: extend siginfo structure to include bound violation information Date: Thu, 11 Sep 2014 16:46:45 +0800 Message-Id: <1410425210-24789-6-git-send-email-qiaowei.ren@intel.com> In-Reply-To: <1410425210-24789-1-git-send-email-qiaowei.ren@intel.com> References: <1410425210-24789-1-git-send-email-qiaowei.ren@intel.com> Sender: owner-linux-mm@kvack.org List-ID: To: "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , Dave Hansen Cc: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Qiaowei Ren 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 8f0876f..2c403a4 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 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