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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 A625CC10F25 for ; Mon, 9 Mar 2020 05:37:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7AB8820665 for ; Mon, 9 Mar 2020 05:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726217AbgCIFhM (ORCPT ); Mon, 9 Mar 2020 01:37:12 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:38447 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725796AbgCIFhM (ORCPT ); Mon, 9 Mar 2020 01:37:12 -0400 Received: by mail-io1-f72.google.com with SMTP id x2so5970596iog.5 for ; Sun, 08 Mar 2020 22:37:11 -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=qR7L3Mw/sXzOkxDD0WkoV3TAHZKs07cskY4mOVvSiC4=; b=ZRTaC0aClt5+rvVR/ugkXQT2t89Ns3B1S6hmp4flidyueqf3wOonZbLj6ux91LzInP StI3sNIhUnSJV9S61Hulo1jk3e5BAvWPfUVwV6rVCEZCuz7fxk+gwXMHykaRU+SOTS39 Bbnpin67jCSuah9FCqq0CXcX7etq9PLvqH7kHNgCLdFzBD0S7lKqw23RXWi0ML/kQKFO tukq3P9LLqiu5lBCqjcOsFWI2WWw5Q8dDud1Fwzc84Va9B7URzHtPSFpITJIy3FOppLm cdeNNIH0mJdK/Q690LcNbVpkhKrVIFhV/m7FRqlWlU4OeFPShD8JGl0xnlNZZPToZllh E6Bw== X-Gm-Message-State: ANhLgQ31dHZWne+klbSIju5VMz+yLN6wIWBKcdQbOK0FNLn0qj5np8T9 447r2tlRC3kSLgxqw2tkS+bFVfxdFhGIiusbEw3njs6GMlzm X-Google-Smtp-Source: ADFU+vum+r6hRGIYt4ee1APtBeB4MVtQKk1JWlXqJ8GrRMI4bdCX+pxHtkPSBAfALZTkbW8753D9sBQticAPB86qvseGjVvTv+5S MIME-Version: 1.0 X-Received: by 2002:a05:6638:68c:: with SMTP id i12mr6476138jab.95.1583732231265; Sun, 08 Mar 2020 22:37:11 -0700 (PDT) Date: Sun, 08 Mar 2020 22:37:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000010600905a06565a7@google.com> Subject: BUG: unable to handle kernel NULL pointer dereference in do_fast_syscall_32 (2) From: syzbot To: bp@alien8.de, hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8" 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: fb279f4e Merge branch 'i2c/for-current-fixed' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17d84f31e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=751a68849f797e8b dashboard link: https://syzkaller.appspot.com/bug?extid=7f0cd10fb4b63c9e7046 compiler: gcc (GCC) 9.0.0 20181231 (experimental) userspace arch: i386 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+7f0cd10fb4b63c9e7046@syzkaller.appspotmail.com BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 95be5067 P4D 95be5067 PUD a6eaf067 PMD 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 1 PID: 9527 Comm: syz-executor.3 Not tainted 5.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] RIP: 0010:do_fast_syscall_32+0x289/0xdfb arch/x86/entry/common.c:408 Code: 00 0f 85 a7 0a 00 00 48 89 ef ff 14 dd a0 79 00 88 48 8d 7d 50 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RSP: 0018:ffffc90002207f18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000000a2 RCX: 1ffff92000440ff5 RDX: dffffc0000000000 RSI: ffffffff8162df47 RDI: ffffc90002207fa8 RBP: ffffc90002207f58 R08: ffff8880613b2140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000f7f3be39 R13: ffffffff8973b288 R14: ffffc90002207fd8 R15: ffffc90002207fd0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000096ba900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000a70f6000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 Modules linked in: CR2: 0000000000000000 ---[ end trace e097d86a02851000 ]--- RIP: 0010:do_syscall_32_irqs_on arch/x86/entry/common.c:337 [inline] RIP: 0010:do_fast_syscall_32+0x289/0xdfb arch/x86/entry/common.c:408 Code: 00 0f 85 a7 0a 00 00 48 89 ef ff 14 dd a0 79 00 88 48 8d 7d 50 48 ba 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 11 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 RSP: 0018:ffffc90002207f18 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000000000a2 RCX: 1ffff92000440ff5 RDX: dffffc0000000000 RSI: ffffffff8162df47 RDI: ffffc90002207fa8 RBP: ffffc90002207f58 R08: ffff8880613b2140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000f7f3be39 R13: ffffffff8973b288 R14: ffffc90002207fd8 R15: ffffc90002207fd0 FS: 0000000000000000(0000) GS:ffff8880ae700000(0063) knlGS:00000000096ba900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000a70f6000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.