From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2105C7618F for ; Tue, 16 Jul 2019 19:03:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A21382173E for ; Tue, 16 Jul 2019 19:03:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563303812; bh=SlLad1gTFetYn90NL50+Q9zL3TJWm2yntm0wRhOd1Lo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=FMIrqCukIUYN2dJKvDjfkABfLG1NuIkCO3lkJob2fO0RhIWW4BUqX4ApfoOaVO/mx eaJY1EACyFALHrv5dhi90Bv5m1jaPmyh7Drh10AnD/e42ur4//EpdpKLyPQcJk73fc TvtiW9L8rp2IHBqa4piUEPkAmoybG2pwqoZR690g= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728137AbfGPTDc (ORCPT ); Tue, 16 Jul 2019 15:03:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:39984 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726213AbfGPTDc (ORCPT ); Tue, 16 Jul 2019 15:03:32 -0400 Received: from localhost (unknown [113.157.217.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8FAF420665; Tue, 16 Jul 2019 19:03:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563303811; bh=SlLad1gTFetYn90NL50+Q9zL3TJWm2yntm0wRhOd1Lo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=av/PpkucEGO4jBghtD17yRpzR4sC+JMV19GsYGDwHEaCbm4illzuWzXOzNuv5cY7k iq/v1sqByCpGOLqQB28FcoMcABAv1jchyNmDepDPO1moNpRUPPUnKUgYvfRBWTIrWe WqfPJpkFLXNMtu0oHNIBiP3iDjigC6d9Xur5VHsQ= Date: Wed, 17 Jul 2019 04:03:28 +0900 From: Greg KH To: Zubin Mithra Cc: stable@vger.kernel.org, groeck@chromium.org, pbonzini@redhat.com, rkrcmar@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com Subject: Re: b21629da120d ("kvm: x86: avoid warning on repeated KVM_SET_TSS_ADDR") Message-ID: <20190716190328.GA20227@kroah.com> References: <20190716171247.GA7816@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190716171247.GA7816@google.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Jul 16, 2019 at 10:12:48AM -0700, Zubin Mithra wrote: > Hello, > > Syzkaller has triggered a kernel WARNING when fuzzing a 4.4 kernel with the following stacktrace. > Call Trace: > [] __dump_stack lib/dump_stack.c:15 [inline] > [] dump_stack+0xbf/0x113 lib/dump_stack.c:51 > [] panic+0x1a6/0x361 kernel/panic.c:116 > [] __warn+0x168/0x1b0 kernel/panic.c:470 > [] warn_slowpath_null+0x3c/0x40 kernel/panic.c:514 > [] __x86_set_memory_region+0x1c2/0x3ef arch/x86/kvm/x86.c:7792 > [] x86_set_memory_region+0x45/0x5c arch/x86/kvm/x86.c:7838 > [] vmx_set_tss_addr+0x8c/0x246 arch/x86/kvm/vmx.c:5171 > [] kvm_vm_ioctl_set_tss_addr arch/x86/kvm/x86.c:3520 [inline] > [] kvm_arch_vm_ioctl+0x26b/0x17db arch/x86/kvm/x86.c:3788 > [] kvm_vm_ioctl+0xb7d/0xbfa arch/x86/kvm/../../../virt/kvm/kvm_main.c:2959 > [] vfs_ioctl fs/ioctl.c:43 [inline] > [] do_vfs_ioctl+0xcb0/0xd0f fs/ioctl.c:630 > [] SYSC_ioctl fs/ioctl.c:645 [inline] > [] SyS_ioctl+0x71/0xad fs/ioctl.c:636 > [] tracesys_phase2+0xa3/0xa8 > > Could the following patch be applied to v4.4.y. The patch is present in v4.9.y. > * b21629da120d ("kvm: x86: avoid warning on repeated KVM_SET_TSS_ADDR") > > Tests run: > * Syzkaller reproducer > * Chrome OS tryjobs Now queued up, thanks. greg k-h