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=-3.7 required=3.0 tests=BAYES_00,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 B2648C07E99 for ; Sat, 3 Jul 2021 05:41:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F703613F9 for ; Sat, 3 Jul 2021 05:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229823AbhGCFnx (ORCPT ); Sat, 3 Jul 2021 01:43:53 -0400 Received: from mail-io1-f71.google.com ([209.85.166.71]:46728 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229797AbhGCFnu (ORCPT ); Sat, 3 Jul 2021 01:43:50 -0400 Received: by mail-io1-f71.google.com with SMTP id a24-20020a5d95580000b029044cbcdddd23so8518604ios.13 for ; Fri, 02 Jul 2021 22:41:16 -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=Xjufe8/uupoFVmY21qWlSTgp8wySY2FRac9z3X1dg2M=; b=gtQptB+M+n+ceXbomD543FzyxobaAp8iUvv2RxQdXgjQe9r8zIZA9Fh/YSMBhT5NGr XGdYeyxxtFb7tQHhHsY37KRxnLnTtimNVCwBMcX64h2hBTHCQ948PWHej9sXB4eQocAN RDNZgw0hf8DAnJI1dgg3BPoeaRxF9O5hP5iKnXFMz+8NrhW0FbjxwHbVj7lx5ZW49QZz NLx6uJwv44/Abfkdw3qZg8Y0hdeyRoSa4AMZpaqkzlAtSHsmrz2rZiXaz+oJThdMJhCA VlJK30LGxdxpF7ai6RuNz1a2upq3eR4i/VyaN5txDMrdYw7QEdH5AU2H5NVvqXuTUC/Z h9kw== X-Gm-Message-State: AOAM532myX6nRtVCTc9cWHAwX/xaZZdJv4nmzc7d0Zv48rHp34x2ZPp/ 8eA3YxKDf5IITxXp6wfaztNuZU7lOLdhtXjL3p7KLiULGpTR X-Google-Smtp-Source: ABdhPJyBRnciPv1NG7xfwO9BqI/DpEyU8Cq8H8+tMFgcY3CRTskWYCOzaqpOwJKI6155yjxPsscpSXoMOZrf0hHU1tI8KdgREr35 MIME-Version: 1.0 X-Received: by 2002:a92:de05:: with SMTP id x5mr2293951ilm.260.1625290875752; Fri, 02 Jul 2021 22:41:15 -0700 (PDT) Date: Fri, 02 Jul 2021 22:41:15 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004e5ec705c6318557@google.com> Subject: [syzbot] general protection fault in legacy_parse_param From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 62fb9874 Linux 5.13 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ffa118300000 kernel config: https://syzkaller.appspot.com/x/.config?x=19404adbea015a58 dashboard link: https://syzkaller.appspot.com/bug?extid=d1e3b1d92d25abf97943 compiler: Debian clang version 11.0.1-2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d1e3b1d92d25abf97943@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 20300 Comm: syz-executor.1 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memchr+0x2f/0x70 lib/string.c:1054 Code: 41 54 53 48 89 d3 41 89 f7 45 31 f6 49 bc 00 00 00 00 00 fc ff df 0f 1f 44 00 00 48 85 db 74 3b 48 89 fd 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 0f 48 ff cb 48 8d 7d 01 44 38 7d 00 75 db RSP: 0018:ffffc90001dafd00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000013 RCX: dffffc0000000000 RDX: 0000000000000013 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e171bf R09: ffffffff81e16f95 R10: 0000000000000002 R11: ffff88807e96b880 R12: dffffc0000000000 R13: ffff888020894000 R14: 0000000000000000 R15: 000000000000002c FS: 00007fe01ae27700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005645a8 CR3: 0000000018afc000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: legacy_parse_param+0x461/0x7e0 fs/fs_context.c:537 vfs_parse_fs_param+0x1e5/0x460 fs/fs_context.c:117 vfs_fsconfig_locked fs/fsopen.c:265 [inline] __do_sys_fsconfig fs/fsopen.c:439 [inline] __se_sys_fsconfig+0xba9/0xff0 fs/fsopen.c:314 do_syscall_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe01ae27188 EFLAGS: 00000246 ORIG_RAX: 00000000000001af RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 00000000200002c0 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000300 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd4bb7c5bf R14: 00007fe01ae27300 R15: 0000000000022000 Modules linked in: ---[ end trace 5d7119165725bd63 ]--- RIP: 0010:memchr+0x2f/0x70 lib/string.c:1054 Code: 41 54 53 48 89 d3 41 89 f7 45 31 f6 49 bc 00 00 00 00 00 fc ff df 0f 1f 44 00 00 48 85 db 74 3b 48 89 fd 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 0f 48 ff cb 48 8d 7d 01 44 38 7d 00 75 db RSP: 0018:ffffc90001dafd00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000013 RCX: dffffc0000000000 RDX: 0000000000000013 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e171bf R09: ffffffff81e16f95 R10: 0000000000000002 R11: ffff88807e96b880 R12: dffffc0000000000 R13: ffff888020894000 R14: 0000000000000000 R15: 000000000000002c FS: 00007fe01ae27700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da0 CR3: 0000000018afc000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.