Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761604AbXIXXvN (ORCPT ); Mon, 24 Sep 2007 19:51:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757935AbXIXXu6 (ORCPT ); Mon, 24 Sep 2007 19:50:58 -0400 Received: from mx1.redhat.com ([66.187.233.31]:51019 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757899AbXIXXu5 (ORCPT ); Mon, 24 Sep 2007 19:50:57 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit From: Roland McGrath To: Paul Mackerras , linuxppc-dev@ozlabs.org Cc: Andrew Morton , Linus Torvalds , linux-kernel@vger.kernel.org Cc: David Woodhouse Subject: [PATCH 1/2] powerpc: ptrace CHECK_FULL_REGS X-Fcc: ~/Mail/linus X-Shopping-List: (1) Trenchant catatonic aluminum (2) Televised baskets (3) Parliamentary bums (4) Olympic Slanty-wise longitudes Message-Id: <20070924235052.5AFC24D04B7@magilla.localdomain> Date: Mon, 24 Sep 2007 16:50:52 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4720 Lines: 122 This restores the CHECK_FULL_REGS sanity check to every place that can access the nonvolatile GPRs for ptrace. This is already done for native-bitwidth PTRACE_PEEKUSR, but was omitted for many other cases (32-bit ptrace, PTRACE_GETREGS, etc.); I think there may have been more uniform checks before that were lost in the recent cleanup of GETREGS et al. Signed-off-by: Roland McGrath --- arch/powerpc/kernel/ptrace.c | 4 ++++ arch/powerpc/kernel/ptrace32.c | 8 ++++++++ 2 files changed, 12 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 8a177bd..40d34b3 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c @@ -331,6 +331,7 @@ static long arch_ptrace_old(struct task_struct *child, long request, long addr, unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; unsigned long __user *tmp = (unsigned long __user *)addr; + CHECK_FULL_REGS(child->thread.regs); for (i = 0; i < 32; i++) { ret = put_user(*reg, tmp); if (ret) @@ -346,6 +347,7 @@ static long arch_ptrace_old(struct task_struct *child, long request, long addr, unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; unsigned long __user *tmp = (unsigned long __user *)addr; + CHECK_FULL_REGS(child->thread.regs); for (i = 0; i < 32; i++) { ret = get_user(*reg, tmp); if (ret) @@ -517,6 +519,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = -EIO; break; } + CHECK_FULL_REGS(child->thread.regs); ret = 0; for (ui = 0; ui < PT_REGS_COUNT; ui ++) { ret |= __put_user(ptrace_get_reg(child, ui), @@ -537,6 +540,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) ret = -EIO; break; } + CHECK_FULL_REGS(child->thread.regs); ret = 0; for (ui = 0; ui < PT_REGS_COUNT; ui ++) { ret = __get_user(tmp, (unsigned long __user *) data); diff --git a/arch/powerpc/kernel/ptrace32.c b/arch/powerpc/kernel/ptrace32.c index 9e6baea..6b86960 100644 --- a/arch/powerpc/kernel/ptrace32.c +++ b/arch/powerpc/kernel/ptrace32.c @@ -53,6 +53,7 @@ static long compat_ptrace_old(struct task_struct *child, long request, unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; unsigned int __user *tmp = (unsigned int __user *)addr; + CHECK_FULL_REGS(child->thread.regs); for (i = 0; i < 32; i++) { ret = put_user(*reg, tmp); if (ret) @@ -68,6 +69,7 @@ static long compat_ptrace_old(struct task_struct *child, long request, unsigned long *reg = &((unsigned long *)child->thread.regs)[0]; unsigned int __user *tmp = (unsigned int __user *)addr; + CHECK_FULL_REGS(child->thread.regs); for (i = 0; i < 32; i++) { ret = get_user(*reg, tmp); if (ret) @@ -164,6 +166,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, if ((addr & 3) || (index > PT_FPSCR32)) break; + CHECK_FULL_REGS(child->thread.regs); if (index < PT_FPR0) { tmp = ptrace_get_reg(child, index); } else { @@ -210,6 +213,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, if ((addr & 3) || numReg > PT_FPSCR) break; + CHECK_FULL_REGS(child->thread.regs); if (numReg >= PT_FPR0) { flush_fp_to_thread(child); tmp = ((unsigned long int *)child->thread.fpr)[numReg - PT_FPR0]; @@ -270,6 +274,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, if ((addr & 3) || (index > PT_FPSCR32)) break; + CHECK_FULL_REGS(child->thread.regs); if (index < PT_FPR0) { ret = ptrace_put_reg(child, index, data); } else { @@ -307,6 +312,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, */ if ((addr & 3) || (numReg > PT_FPSCR)) break; + CHECK_FULL_REGS(child->thread.regs); if (numReg < PT_FPR0) { unsigned long freg = ptrace_get_reg(child, numReg); if (index % 2) @@ -342,6 +348,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, ret = -EIO; break; } + CHECK_FULL_REGS(child->thread.regs); ret = 0; for (ui = 0; ui < PT_REGS_COUNT; ui ++) { ret |= __put_user(ptrace_get_reg(child, ui), @@ -359,6 +366,7 @@ long compat_sys_ptrace(int request, int pid, unsigned long addr, ret = -EIO; break; } + CHECK_FULL_REGS(child->thread.regs); ret = 0; for (ui = 0; ui < PT_REGS_COUNT; ui ++) { ret = __get_user(tmp, (unsigned int __user *) data); - 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/