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=2.1 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SORTED_RECIPS,SPF_PASS, URIBL_BLOCKED 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 8D1E9C1B0F2 for ; Wed, 20 Jun 2018 06:04:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3A5E020652 for ; Wed, 20 Jun 2018 06:04:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3A5E020652 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752903AbeFTGED (ORCPT ); Wed, 20 Jun 2018 02:04:03 -0400 Received: from mail-it0-f72.google.com ([209.85.214.72]:37644 "EHLO mail-it0-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751092AbeFTGEC (ORCPT ); Wed, 20 Jun 2018 02:04:02 -0400 Received: by mail-it0-f72.google.com with SMTP id p130-v6so2105268itp.2 for ; Tue, 19 Jun 2018 23:04:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=QOUp1Icm6xlMt66F0NEhVvPiqPJx7MX2n25DhGPeD9Y=; b=cIwVuXgHZFBkC7/kIVpGLHb+PZTd/3qqxIYH9EGKjHvWDW0WE67TKuEJGSv6G0dI99 qLXRGJIofpqR+USyJAEMctjeclVah+010t+mNDZlvEW6Gyfc4ks8hxIrkFc/kBo90nSQ TTodX1n5aJG9bFj4cjvyjmircwW5phn8jFPo1wQ/k44+NPuUnKiovQ60LP+RSarf2yZX jx/dp/lczNh6RGW3StgEfpbHK0+cytszTl3IuLKL9en3Z3kCupnZ8uC24OZjHvACUdLl 9MLqNT72UH0Jm2xhsTaEMSkWGdR9LiaaSy4fleX2mbvQeWEHIxNDtPrqI/WD4R7nPogv CH5Q== X-Gm-Message-State: APt69E0JChU7qpBT+wDYctn88AfrlOTiqnDlDKGb/eo3A7nm0Qm7JG8C WZ/PwPzXFoCf8O/e/Rv+/resO0BpY4Jn8n4D6L2UVlxAnza+ X-Google-Smtp-Source: ADUXVKIVOY3iADZzF1h/FOVUlWirnURafQUPsiDFTblbSz/3bP1nxYbGBOMgGpZyYwh12FiGuCjqehb4BLZB5HLHgS0NKgup5eSm MIME-Version: 1.0 X-Received: by 2002:a24:5083:: with SMTP id m125-v6mr238745itb.26.1529474641744; Tue, 19 Jun 2018 23:04:01 -0700 (PDT) Date: Tue, 19 Jun 2018 23:04:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b6dcad056f0c9089@google.com> Subject: KASAN: stack-out-of-bounds Read in unwind_next_frame From: syzbot To: hpa@zytor.com, jpoimboe@redhat.com, linux-kernel@vger.kernel.org, mhiramat@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: ba4dbdedd3ed Merge tag 'jfs-4.18' of git://github.com/klei.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17fe8bd8400000 kernel config: https://syzkaller.appspot.com/x/.config?x=f390986c4f7cd566 dashboard link: https://syzkaller.appspot.com/bug?extid=3ae3575e398ca1d88e5d compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+3ae3575e398ca1d88e5d@syzkaller.appspotmail.com kvm: pic: single mode not supported ================================================================== BUG: KASAN: stack-out-of-bounds in __read_once_size include/linux/compiler.h:188 [inline] BUG: KASAN: stack-out-of-bounds in unwind_next_frame.part.7+0x801/0x9e0 arch/x86/kernel/unwind_frame.c:326 Read of size 8 at addr ffff88017c386c78 by task syz-executor0/22016 CPU: 1 PID: 22016 Comm: syz-executor0 Not tainted 4.18.0-rc1+ #109 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_address_description+0x6c/0x20b mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 __read_once_size include/linux/compiler.h:188 [inline] unwind_next_frame.part.7+0x801/0x9e0 arch/x86/kernel/unwind_frame.c:326 unwind_next_frame+0x3e/0x50 arch/x86/kernel/unwind_frame.c:287 __save_stack_trace+0x7d/0xf0 arch/x86/kernel/stacktrace.c:44 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_trace+0xe0/0x290 kernel/locking/lockdep.c:404 check_prev_add kernel/locking/lockdep.c:1915 [inline] check_prevs_add kernel/locking/lockdep.c:1980 [inline] validate_chain kernel/locking/lockdep.c:2421 [inline] __lock_acquire+0x39a8/0x5020 kernel/locking/lockdep.c:3435 lock_acquire+0x1e4/0x540 kernel/locking/lockdep.c:3924 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 vprintk_emit+0x191/0xdf0 kernel/printk/printk.c:1848 vprintk_default+0x28/0x30 kernel/printk/printk.c:1948 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:382 printk+0xa7/0xcf kernel/printk/printk.c:1981 kasan_die_handler.cold.22+0x11/0x30 arch/x86/mm/kasan_init_64.c:251 notifier_call_chain+0x180/0x390 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x98/0x190 kernel/notifier.c:193 notify_die+0x1be/0x2e0 kernel/notifier.c:549 do_general_protection+0x248/0x2f0 arch/x86/kernel/traps.c:559 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1159 RIP: 0010:msr_write_intercepted arch/x86/kvm/vmx.c:2327 [inline] RIP: 0010:vmx_vcpu_run+0x131a/0x2600 arch/x86/kvm/vmx.c:10149 Code: 00 00 10 89 de e8 36 65 5c 00 85 db 0f 84 91 00 00 00 e8 19 64 5c 00 48 8b 54 24 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8c 10 00 00 48 8b 04 24 48 8b 98 40 57 00 00 48 RSP: 0018:ffff88017c387370 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000010000000 RCX: ffffffff811f467a RDX: 000000000000045b RSI: ffffffff811f4687 RDI: 0000000000000005 RBP: ffff88017c3873a8 R08: ffff8801b0e4a080 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the page: page:ffffea0005f0e180 count:0 mapcount:0 mapping:0000000000000000 index:0xffff88017c386940 flags: 0x2fffc0000000000() raw: 02fffc0000000000 0000000000000000 dead000000000200 0000000000000000 raw: ffff88017c386940 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88017c386b00: f2 f2 f8 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 ffff88017c386b80: f2 f2 f8 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 > ffff88017c386c00: f2 f2 f8 f2 f2 f2 00 00 00 00 00 00 00 f2 f2 f2 ^ ffff88017c386c80: 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f1 f1 f1 f1 00 f2 ffff88017c386d00: f2 f2 f2 f2 f2 f2 f8 f2 f2 f2 f2 f2 00 00 00 00 ================================================================== --- This bug is generated by a bot. 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