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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 7AC9AC43603 for ; Mon, 16 Dec 2019 07:55:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4E38A20725 for ; Mon, 16 Dec 2019 07:55:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726742AbfLPHzK (ORCPT ); Mon, 16 Dec 2019 02:55:10 -0500 Received: from mail-il1-f198.google.com ([209.85.166.198]:48119 "EHLO mail-il1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726054AbfLPHzK (ORCPT ); Mon, 16 Dec 2019 02:55:10 -0500 Received: by mail-il1-f198.google.com with SMTP id x69so5835542ill.14 for ; Sun, 15 Dec 2019 23:55:07 -0800 (PST) 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=DoFXJSJKMvoDM3LRXAT9KZk/64+PWGsl9OaFVHFDZvQ=; b=HiuDtSldNwBbMKLswqVQRiU9JTK6OVIFs2jtKdkR2tzJd2V5kp8Ch3ZjEfFn6hBwv5 mToZpHLuMtNqjfKLJm8ZW/T2bGLJyzUmCsqEG+OdTvYMcaomyANuiHqpJyZWNTBNjbWh PetptgE6RR0272Y4bnEFlk516EyrTxsGmJ/2oT+yosBn2RiLVOsIcYACBZQtaxpyZ8Vt +fp/U4D8BnE++XK5okUmUytll1ASbRtvGEeSUmC1BEd7W8fPJ7Q5h7KsHYUmouncye7L r2arG+BGqVWcbgJGDVBx3zg68F00AsrQLhtNR+DRZ8rt9ViItZdruUYrN8mJYXAmhRtG l61w== X-Gm-Message-State: APjAAAVJ2OKEclXprKROWuP6N0tlw/px9Bo0NwHEROukMlOIV/PucD0k s150q8jTGzWlhmbwvlcXy7qml/6p3w5HBUue0cFqOeVBVm6S X-Google-Smtp-Source: APXvYqx0uWwaLQvQEejqYGoCN4/q2wXWlIFpAXBYDSvNNvVldkxcbn1hXaXH3vJRow4HaZVJGld2E9n9p8gjVzIu8HqeHD86UAC/ MIME-Version: 1.0 X-Received: by 2002:a5d:8854:: with SMTP id t20mr15271401ios.121.1576482907559; Sun, 15 Dec 2019 23:55:07 -0800 (PST) Date: Sun, 15 Dec 2019 23:55:07 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b321f20599cd8725@google.com> Subject: upstream boot error: general protection fault in do_mount_root From: syzbot To: dhowells@redhat.com, linux-kernel@vger.kernel.org, linux@dominikbrodowski.net, pc@cjr.nz, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk 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: d1eef1c6 Linux 5.5-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11ff2fb1e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=dcf10bf83926432a dashboard link: https://syzkaller.appspot.com/bug?extid=958915844b296815c246 compiler: gcc (GCC) 9.0.0 20181231 (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+958915844b296815c246@syzkaller.appspotmail.com IPI shorthand broadcast: enabled AVX2 version of gcm_enc/dec engaged. AES CTR mode by8 optimization enabled registered taskstats version 1 Loading compiled-in X.509 certificates Loaded X.509 cert 'Build time autogenerated kernel key: 2a1122198a3e68692ac5775a16203e4f5f9d30c2' zswap: loaded using pool lzo/zbud Key type ._fscrypt registered Key type .fscrypt registered Btrfs loaded, crc32c=crc32c-intel Key type big_key registered Key type encrypted registered ima: No TPM chip found, activating TPM-bypass! ima: Allocated hash algorithm: sha256 ima: No architecture policies found evm: Initialising EVM extended attributes: evm: security.selinux evm: security.SMACK64 evm: security.SMACK64EXEC evm: security.SMACK64TRANSMUTE evm: security.SMACK64MMAP evm: security.apparmor evm: security.ima evm: security.capability evm: HMAC attrs: 0x1 PM: Magic number: 15:612:306 usb usb38: hash matches tty tty35: hash matches printk: console [netcon0] enabled netconsole: network logging started gtp: GTP module loaded (pdp ctx size 104 bytes) rdma_rxe: loaded cfg80211: Loading compiled-in X.509 certificates for regulatory database cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7' Unstable clock detected, switching default tracing clock to "global" If you want to keep using the local clock, then add: "trace_clock=local" on the kernel command line ALSA device list: #0: Dummy 1 #1: Loopback 1 #2: Virtual MIDI Card 1 #3: HDA Intel at 0xfebf0000 irq 31 md: Waiting for all devices to be available before autodetect md: If you don't use raid, use raid=noautodetect md: Autodetecting RAID arrays. md: autorun ... md: ... autorun DONE. kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 3 PID: 1 Comm: swapper/0 Not tainted 5.5.0-rc2-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 RIP: 0010:strncpy+0x35/0xc0 lib/string.c:119 Code: e5 41 56 41 55 4c 8d 34 17 49 bd 00 00 00 00 00 fc ff df 41 54 53 48 89 fb 48 83 ec 10 48 89 f2 48 89 f1 48 c1 ea 03 83 e1 07 <42> 0f b6 14 2a 38 ca 7f 04 84 d2 75 40 48 89 da 48 89 d9 44 0f b6 RSP: 0000:ffffc9000034fca8 EFLAGS: 00010246 RAX: ffff88807331f000 RBX: ffff88807331f000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807331f000 RBP: ffffc9000034fcd8 R08: ffff88807331f000 R09: ffffed1005a6703d R10: ffffed1005a6703c R11: ffff88802d3381e3 R12: ffffea0001ccc7c0 R13: dffffc0000000000 R14: ffff88807331ffff R15: ffff88801f1cb000 FS: 0000000000000000(0000) GS:ffff88802d300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000986d000 CR4: 0000000000340ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strncpy include/linux/string.h:281 [inline] do_mount_root+0x74/0x23b init/do_mounts.c:404 mount_block_root+0x342/0x51a init/do_mounts.c:438 mount_root+0x283/0x2cd init/do_mounts.c:628 prepare_namespace+0x26f/0x2a7 init/do_mounts.c:687 kernel_init_freeable+0x557/0x570 init/main.c:1231 kernel_init+0x12/0x1bf init/main.c:1110 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Modules linked in: ---[ end trace dc1d12e4189687e7 ]--- RIP: 0010:strncpy+0x35/0xc0 lib/string.c:119 Code: e5 41 56 41 55 4c 8d 34 17 49 bd 00 00 00 00 00 fc ff df 41 54 53 48 89 fb 48 83 ec 10 48 89 f2 48 89 f1 48 c1 ea 03 83 e1 07 <42> 0f b6 14 2a 38 ca 7f 04 84 d2 75 40 48 89 da 48 89 d9 44 0f b6 RSP: 0000:ffffc9000034fca8 EFLAGS: 00010246 RAX: ffff88807331f000 RBX: ffff88807331f000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807331f000 RBP: ffffc9000034fcd8 R08: ffff88807331f000 R09: ffffed1005a6703d R10: ffffed1005a6703c R11: ffff88802d3381e3 R12: ffffea0001ccc7c0 R13: dffffc0000000000 R14: ffff88807331ffff R15: ffff88801f1cb000 FS: 0000000000000000(0000) GS:ffff88802d300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000000986d000 CR4: 0000000000340ee0 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.