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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18E6FC25B0D for ; Thu, 11 Aug 2022 07:29:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234280AbiHKH3j (ORCPT ); Thu, 11 Aug 2022 03:29:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234256AbiHKH3h (ORCPT ); Thu, 11 Aug 2022 03:29:37 -0400 Received: from mail-io1-f69.google.com (mail-io1-f69.google.com [209.85.166.69]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FB52923ED for ; Thu, 11 Aug 2022 00:29:35 -0700 (PDT) Received: by mail-io1-f69.google.com with SMTP id x2-20020a6bfe02000000b00682bffede8fso9117879ioh.2 for ; Thu, 11 Aug 2022 00:29:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc; bh=R8kRDpyv1KxLfdIZhodJDLBZ48C/DQoHZuuLF1/xG3w=; b=sXKxH65PM0WpUW0wI8NHuQEpfQrM0iD5lKOAUrVxsNjbxAKHl0MScCFTh6nTHF7w3m +XAg7eIlAs3UT/pbXBt4VBy+FTW9aRrCSC7jM/zbux6FQHwHOAxSY2nAHoc0ScnT7JcN Y3chLGN8GEFWMznyqHtoxwaItLC4N+7ZUy6HPIxf4Pn8g46u1Bm2whTkrhDnKYGYpwRu hbRQsqF3GDxRkeV8hIOqGTuQE+e25Iagk3QrLRWQPOnqiGLBP+HVXnRo4Mcs5jjIToNy 7fCx2ik5ELYT9TyD23DDeZgGr5qww/OhrzgENpLKeI4wA+Dcx3JlHe4JB4PZPCG5NO6O njJw== X-Gm-Message-State: ACgBeo2cJlYfhfcAgTEVcojsQOglmmR/9GejTzrbRAC9NCaTP+aJQN0B +cQku/N/Xv4TMTdrlO/IuOBvl82v9r8VMrefcbdWAIgJrbiG X-Google-Smtp-Source: AA6agR7L1DUjhU6F02s7AAt5sji6PtqXhx0b5pUdphzTPinmukU0FSYeGyQ2f6yixWmrnIjWMVWbP6Oy0XOovVCZUMBtMwb4ke+B MIME-Version: 1.0 X-Received: by 2002:a5d:8b8c:0:b0:67b:8779:753b with SMTP id p12-20020a5d8b8c000000b0067b8779753bmr12954415iol.57.1660202974446; Thu, 11 Aug 2022 00:29:34 -0700 (PDT) Date: Thu, 11 Aug 2022 00:29:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008c0ba505e5f22066@google.com> Subject: [syzbot] linux-next boot error: BUG: unable to handle kernel paging request in kernel_execve From: syzbot To: ebiederm@xmission.com, keescook@chromium.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-next@vger.kernel.org, sfr@canb.auug.org.au, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: bc6c6584ffb2 Add linux-next specific files for 20220810 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=115034c3080000 kernel config: https://syzkaller.appspot.com/x/.config?x=5784be4315a4403b dashboard link: https://syzkaller.appspot.com/bug?extid=3250d9c8925ef29e975f compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3250d9c8925ef29e975f@syzkaller.appspotmail.com BUG: unable to handle page fault for address: ffffdc0000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 11826067 P4D 11826067 PUD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 1100 Comm: kworker/u4:5 Not tainted 5.19.0-next-20220810-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:strnlen+0x3b/0x70 lib/string.c:504 Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83 RSP: 0000:ffffc90005c5fe10 EFLAGS: 00010246 RAX: ffff000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 1fffe00000000000 RSI: 0000000000020000 RDI: ffff000000000000 RBP: ffff000000020000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000000 R12: ffff000000000000 R13: ffff88814764cc00 R14: ffff000000000000 R15: ffff88814764cc00 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000000 CR3: 000000000bc8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: strnlen include/linux/fortify-string.h:119 [inline] copy_string_kernel+0x26/0x250 fs/exec.c:616 copy_strings_kernel+0xb3/0x190 fs/exec.c:655 kernel_execve+0x377/0x500 fs/exec.c:1998 call_usermodehelper_exec_async+0x2e3/0x580 kernel/umh.c:112 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Modules linked in: CR2: ffffdc0000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:strnlen+0x3b/0x70 lib/string.c:504 Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83 RSP: 0000:ffffc90005c5fe10 EFLAGS: 00010246 RAX: ffff000000000000 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 1fffe00000000000 RSI: 0000000000020000 RDI: ffff000000000000 RBP: ffff000000020000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000000 R12: ffff000000000000 R13: ffff88814764cc00 R14: ffff000000000000 R15: ffff88814764cc00 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffdc0000000000 CR3: 000000000bc8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 74 3c je 0x3e 2: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx 9: fc ff df c: 49 89 fc mov %rdi,%r12 f: 48 89 f8 mov %rdi,%rax 12: eb 09 jmp 0x1d 14: 48 83 c0 01 add $0x1,%rax 18: 48 39 e8 cmp %rbp,%rax 1b: 74 1e je 0x3b 1d: 48 89 c2 mov %rax,%rdx 20: 48 89 c1 mov %rax,%rcx 23: 48 c1 ea 03 shr $0x3,%rdx 27: 83 e1 07 and $0x7,%ecx * 2a: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx <-- trapping instruction 2e: 38 ca cmp %cl,%dl 30: 7f 04 jg 0x36 32: 84 d2 test %dl,%dl 34: 75 11 jne 0x47 36: 80 38 00 cmpb $0x0,(%rax) 39: 75 d9 jne 0x14 3b: 4c 29 e0 sub %r12,%rax 3e: 48 rex.W 3f: 83 .byte 0x83 --- 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.