From owner-svn-src-all@FreeBSD.ORG Tue Dec 8 20:18:54 2009 Return-Path: Delivered-To: svn-src-all@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E6AF8106566B; Tue, 8 Dec 2009 20:18:54 +0000 (UTC) (envelope-from marius@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id BBD1A8FC1D; Tue, 8 Dec 2009 20:18:54 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id nB8KIsZ2098723; Tue, 8 Dec 2009 20:18:54 GMT (envelope-from marius@svn.freebsd.org) Received: (from marius@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id nB8KIseI098720; Tue, 8 Dec 2009 20:18:54 GMT (envelope-from marius@svn.freebsd.org) Message-Id: <200912082018.nB8KIseI098720@svn.freebsd.org> From: Marius Strobl Date: Tue, 8 Dec 2009 20:18:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r200272 - in head/sys: sparc64/sparc64 sun4v/sun4v X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Dec 2009 20:18:55 -0000 Author: marius Date: Tue Dec 8 20:18:54 2009 New Revision: 200272 URL: http://svn.freebsd.org/changeset/base/200272 Log: Add additional checks of the kernel stack addresses in order to ensure we don't overrun the end of the call chain. MFC after: 1 week Modified: head/sys/sparc64/sparc64/stack_machdep.c head/sys/sun4v/sun4v/stack_machdep.c Modified: head/sys/sparc64/sparc64/stack_machdep.c ============================================================================== --- head/sys/sparc64/sparc64/stack_machdep.c Tue Dec 8 19:18:32 2009 (r200271) +++ head/sys/sparc64/sparc64/stack_machdep.c Tue Dec 8 20:18:54 2009 (r200272) @@ -36,15 +36,20 @@ __FBSDID("$FreeBSD$"); #include #include -static void stack_capture(struct stack *st, struct frame *fp); +static void stack_capture(struct stack *st, struct frame *frame); static void -stack_capture(struct stack *st, struct frame *fp) +stack_capture(struct stack *st, struct frame *frame) { + struct frame *fp; vm_offset_t callpc; stack_zero(st); - while (1) { + fp = frame; + for (;;) { + if (!INKERNEL((vm_offset_t)fp) || + !ALIGNED_POINTER(fp, uint64_t)) + break; callpc = fp->fr_pc; if (!INKERNEL(callpc)) break; @@ -56,6 +61,9 @@ stack_capture(struct stack *st, struct f break; if (stack_put(st, callpc) == -1) break; + if (v9next_frame(fp) <= fp || + v9next_frame(fp) >= frame + KSTACK_PAGES * PAGE_SIZE) + break; fp = v9next_frame(fp); } } Modified: head/sys/sun4v/sun4v/stack_machdep.c ============================================================================== --- head/sys/sun4v/sun4v/stack_machdep.c Tue Dec 8 19:18:32 2009 (r200271) +++ head/sys/sun4v/sun4v/stack_machdep.c Tue Dec 8 20:18:54 2009 (r200272) @@ -36,20 +36,28 @@ __FBSDID("$FreeBSD$"); #include #include -static void stack_capture(struct stack *st, struct frame *fp); +static void stack_capture(struct stack *st, struct frame *frame); static void -stack_capture(struct stack *st, struct frame *fp) +stack_capture(struct stack *st, struct frame *frame) { + struct frame *fp; vm_offset_t callpc; stack_zero(st); - while (1) { + fp = frame; + for (;;) { + if (!INKERNEL((vm_offset_t)fp) || + !ALIGNED_POINTER(fp, uint64_t)) + break; callpc = fp->fr_pc; if (!INKERNEL(callpc)) break; if (stack_put(st, callpc) == -1) break; + if (v9next_frame(fp) <= fp || + v9next_frame(fp) >= frame + KSTACK_PAGES * PAGE_SIZE) + break; fp = v9next_frame(fp); } }