Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752852AbaJLEyJ (ORCPT ); Sun, 12 Oct 2014 00:54:09 -0400 Received: from mga11.intel.com ([192.55.52.93]:38935 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751934AbaJLEvy (ORCPT ); Sun, 12 Oct 2014 00:51:54 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,703,1406617200"; d="scan'208";a="604027287" From: Qiaowei Ren To: "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , Dave Hansen Cc: x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@linux-mips.org, Qiaowei Ren Subject: [PATCH v9 06/12] mpx: extend siginfo structure to include bound violation information Date: Sun, 12 Oct 2014 12:41:49 +0800 Message-Id: <1413088915-13428-7-git-send-email-qiaowei.ren@intel.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1413088915-13428-1-git-send-email-qiaowei.ren@intel.com> References: <1413088915-13428-1-git-send-email-qiaowei.ren@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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/