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 0A581C43334 for ; Mon, 13 Jun 2022 06:47:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237405AbiFMGrl (ORCPT ); Mon, 13 Jun 2022 02:47:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230320AbiFMGrh (ORCPT ); Mon, 13 Jun 2022 02:47:37 -0400 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F05C611151 for ; Sun, 12 Jun 2022 23:47:26 -0700 (PDT) Received: by mail-io1-f72.google.com with SMTP id s189-20020a6b2cc6000000b00669add3c306so2183363ios.21 for ; Sun, 12 Jun 2022 23:47:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=H900RnRQx9SNLesxaLHwkfzFlgaP9mV0xRwQtd1BOOo=; b=F8MbTDWFSqdf+MFLR2toYSr6Dqal83hw8LQbi2IzVdckDx1MFXveWgY+QzTANW0xso 8hirF5H6RaLDG1S/Msp5VifOvR2nEdXfItbeRITEW2sMXi6F8iKMxQRicbsCFIhiONA8 pGdrHQ27qUS7fjE0bj6vWq3pLkmg1J+38A9RvDnTJ68y+M6Z2g6EUwIQ/LzQc2Q12/9w GZVQ2A1f2OsxaQ6utZjhTbkooFiTWMZ5mHPSrBsO2B/+06iHWO3BrHXXm7dX1s8HagMW W4NtaZFmfkIsi7jT7DynbR5IF8P8emsYjpzOirCwfxYhzwb/s8TpXG8UqTkguEWR8K8T W7DA== X-Gm-Message-State: AOAM5300rMYbaZfhcnhM92Fj0F0/tnrQsfzjJnuQywjdmfr2cFdQVL03 2nm5eCu3gDNhl1SgznVZ7UZOaWAj3ghRYvf2U/aVCB3a778D X-Google-Smtp-Source: ABdhPJwaxGwpZ0AOKZKkKNBlaJ1Hv2ZZ0b7REnUXwS2C2krIZujQL9+DfC80DLBkMg9iwS6zfvJ16p1uigg5l1pVWmD6gRbsOlJr MIME-Version: 1.0 X-Received: by 2002:a6b:2b42:0:b0:669:ba8d:faa4 with SMTP id r63-20020a6b2b42000000b00669ba8dfaa4mr8349074ior.190.1655102846383; Sun, 12 Jun 2022 23:47:26 -0700 (PDT) Date: Sun, 12 Jun 2022 23:47:26 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000039bfb905e14ea9d0@google.com> Subject: [syzbot] kernel BUG in mcopy_continue From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 6d0c80680317 Add linux-next specific files for 20220610 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=13a777f7f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=a30d6e3e814e5931 dashboard link: https://syzkaller.appspot.com/bug?extid=3f1e5c1dea3a2e66ea9a compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 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+3f1e5c1dea3a2e66ea9a@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at mm/userfaultfd.c:642! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 14685 Comm: syz-executor.4 Not tainted 5.19.0-rc1-next-20220610-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__mcopy_atomic mm/userfaultfd.c:642 [inline] RIP: 0010:mcopy_continue+0x80f/0x1360 mm/userfaultfd.c:699 Code: a8 ff 49 83 fd fe 0f 85 bd fd ff ff e8 ba ca a8 ff 0f 1f 44 00 00 e8 b0 ca a8 ff e8 ab ca a8 ff 48 8b 7c 24 20 e8 51 76 8b ff <0f> 0b e8 9a ca a8 ff 0f 0b e8 93 ca a8 ff 4d 89 ee 31 ff 41 81 e6 RSP: 0018:ffffc900058f7b70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff8880226dee58 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a0b4228 RBP: 0000000020531000 R08: 0000000000000001 R09: ffff88801a0b422f R10: ffffed1003416845 R11: 0000000000000001 R12: 0000000000000000 R13: fffffffffffffffe R14: 00000000fffffffe R15: ffff88801a0b4140 FS: 00007f91409ee700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2c522000 CR3: 000000001d578000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: userfaultfd_continue fs/userfaultfd.c:1893 [inline] userfaultfd_ioctl+0x1818/0x41f0 fs/userfaultfd.c:2017 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f913f889109 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f91409ee168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f913f99c030 RCX: 00007f913f889109 RDX: 0000000020000040 RSI: 00000000c020aa07 RDI: 0000000000000004 RBP: 00007f913f8e30ad R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcb29c401f R14: 00007f91409ee300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__mcopy_atomic mm/userfaultfd.c:642 [inline] RIP: 0010:mcopy_continue+0x80f/0x1360 mm/userfaultfd.c:699 Code: a8 ff 49 83 fd fe 0f 85 bd fd ff ff e8 ba ca a8 ff 0f 1f 44 00 00 e8 b0 ca a8 ff e8 ab ca a8 ff 48 8b 7c 24 20 e8 51 76 8b ff <0f> 0b e8 9a ca a8 ff 0f 0b e8 93 ca a8 ff 4d 89 ee 31 ff 41 81 e6 RSP: 0018:ffffc900058f7b70 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff8880226dee58 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801a0b4228 RBP: 0000000020531000 R08: 0000000000000001 R09: ffff88801a0b422f R10: ffffed1003416845 R11: 0000000000000001 R12: 0000000000000000 R13: fffffffffffffffe R14: 00000000fffffffe R15: ffff88801a0b4140 FS: 00007f91409ee700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f91409cd718 CR3: 000000001d578000 CR4: 00000000003526f0 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.