From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:45850 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934520AbcIVNhe (ORCPT ); Thu, 22 Sep 2016 09:37:34 -0400 Subject: Patch "perf/x86/intel/pt: Do validate the size of a kernel address filter" has been added to the 4.7-stable tree To: alexander.shishkin@linux.intel.com, a.p.zijlstra@chello.nl, acme@infradead.org, acme@redhat.com, adrian.hunter@intel.com, eranian@google.com, gregkh@linuxfoundation.org, jolsa@redhat.com, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de, torvalds@linux-foundation.org, vincent.weaver@maine.edu Cc: , From: Date: Thu, 22 Sep 2016 15:35:46 +0200 Message-ID: <1474551346153100@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled perf/x86/intel/pt: Do validate the size of a kernel address filter to the 4.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: perf-x86-intel-pt-do-validate-the-size-of-a-kernel-address-filter.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 1155bafcb79208abc6ae234c6e135ac70607755c Mon Sep 17 00:00:00 2001 From: Alexander Shishkin Date: Thu, 15 Sep 2016 18:13:52 +0300 Subject: perf/x86/intel/pt: Do validate the size of a kernel address filter From: Alexander Shishkin commit 1155bafcb79208abc6ae234c6e135ac70607755c upstream. Right now, the kernel address filters in PT are prone to integer overflow that may happen in adding filter's size to its offset to obtain the end of the range. Such an overflow would also throw a #GP in the PT event configuration path. Fix this by explicitly validating the result of this calculation. Reported-by: Adrian Hunter Signed-off-by: Alexander Shishkin Acked-by: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Vince Weaver Cc: vince@deater.net Link: http://lkml.kernel.org/r/20160915151352.21306-4-alexander.shishkin@linux.intel.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman --- arch/x86/events/intel/pt.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -1089,8 +1089,13 @@ static int pt_event_addr_filters_validat if (!filter->range || !filter->size) return -EOPNOTSUPP; - if (!filter->inode && !valid_kernel_ip(filter->offset)) - return -EINVAL; + if (!filter->inode) { + if (!valid_kernel_ip(filter->offset)) + return -EINVAL; + + if (!valid_kernel_ip(filter->offset + filter->size)) + return -EINVAL; + } if (++range > pt_cap_get(PT_CAP_num_address_ranges)) return -EOPNOTSUPP; Patches currently in stable-queue which might be from alexander.shishkin@linux.intel.com are queue-4.7/perf-x86-intel-pt-fix-an-off-by-one-in-address-filter-configuration.patch queue-4.7/perf-x86-intel-fix-pebsv3-record-drain.patch queue-4.7/perf-x86-intel-pt-do-validate-the-size-of-a-kernel-address-filter.patch queue-4.7/perf-x86-intel-pt-fix-kernel-address-filter-s-offset-validation.patch