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, URIBL_BLOCKED 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 7037AC38A2B for ; Sat, 18 Apr 2020 06:44:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 59FBD221F7 for ; Sat, 18 Apr 2020 06:44:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725970AbgDRGoQ (ORCPT ); Sat, 18 Apr 2020 02:44:16 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:33536 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725782AbgDRGoP (ORCPT ); Sat, 18 Apr 2020 02:44:15 -0400 Received: by mail-il1-f199.google.com with SMTP id l18so4813671ilg.0 for ; Fri, 17 Apr 2020 23:44:15 -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=Ju0UyNHzm8Bxnt/XyLuQ0hyMzA9hpJAW3BaCNcJ4ArM=; b=pQR/80IrPtS8WZs3AKInDeOy1gNpZ7Nk4eGW4iLW/wBTju6TIOuguGwWLDe45E6umd n74+1X3+hkhOwVV5VVxrd35U7/lQGJ8Oz/CM1JyDxpCDm+1wLPlWAI/CUvqSXpIoVOR9 mlJZJKnSlGktgLVWvtzmrjrKDpUPQFh3VygMafyESjwfALb9DzF3jRdsfkmaU/igtKkR 5XAzpU/N6DVuIXKqJO+/BwprZjnc2hLlkHr+wLk/j/tdicRMUfCJrS30CYDpWuN0i+dP C0Km/SO0v553FKnvpoSgtvhGPZU5ZKexB5+JD4gEeGwA2Nqmf2Bq5CXY4/Kg4Ok1YpqL y8Gw== X-Gm-Message-State: AGi0PuY0731R1aQqnWlus+U7Qao60SFjeegHU1Au9jITssjhypelkn6o 4Bi7LxcCtK256pjw7Ah5ShKB0jni0ynwytUweHOYlMB1vQJ5 X-Google-Smtp-Source: APiQypKLjqiahVpx7Ssk+DzJg3tnzwqCO8ZGkJ4yIyyU8M19id4dsEYzaiAe+mpnwnxq7/wezasK2+7SZ5P5R+GnoF4bJ34PHCSK MIME-Version: 1.0 X-Received: by 2002:a05:6e02:e03:: with SMTP id a3mr387477ilk.239.1587192254704; Fri, 17 Apr 2020 23:44:14 -0700 (PDT) Date: Fri, 17 Apr 2020 23:44:14 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008832a805a38afe44@google.com> Subject: general protection fault in mm_update_next_owner (2) From: syzbot To: christian@brauner.io, ebiederm@xmission.com, linux-kernel@vger.kernel.org, mingo@kernel.org, oleg@redhat.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de 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: 8f3d9f35 Linux 5.7-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=119a1c07e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d351a1019ed81a2 dashboard link: https://syzkaller.appspot.com/bug?extid=a0f91e07da410c63b9c3 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+a0f91e07da410c63b9c3@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xf1918d9191919193: 0000 [#1] PREEMPT SMP KASAN KASAN: maybe wild-memory-access in range [0x8c8c8c8c8c8c8c98-0x8c8c8c8c8c8c8c9f] CPU: 0 PID: 933 Comm: syz-executor.0 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline] RIP: 0010:mm_update_next_owner+0x49b/0x7a0 kernel/exit.c:385 Code: 48 8d bd 48 03 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f4 02 00 00 48 8b ad 48 03 00 00 4c 8d 7d 10 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 cb 02 00 00 48 8b 45 10 48 8d a8 68 fa ff ff 49 RSP: 0018:ffffc90018517d20 EFLAGS: 00010a07 RAX: 1191919191919193 RBX: dffffc0000000000 RCX: ffffffff81459ed3 RDX: 0000000000000000 RSI: ffffffff81459ee1 RDI: ffff88800013e8e0 RBP: 8c8c8c8c8c8c8c8c R08: ffff8882123f0580 R09: fffffbfff1301219 R10: ffffffff898090c3 R11: fffffbfff1301218 R12: ffff88809552f800 R13: ffff88800013e1c0 R14: 0000000000000000 R15: 8c8c8c8c8c8c8c9c FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000400200 CR3: 000000020b913000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exit_mm kernel/exit.c:478 [inline] do_exit+0xa49/0x2dd0 kernel/exit.c:782 do_group_exit+0x125/0x340 kernel/exit.c:893 __do_sys_exit_group kernel/exit.c:904 [inline] __se_sys_exit_group kernel/exit.c:902 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:902 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45c889 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd4c670f58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000001e RCX: 000000000045c889 RDX: 0000000000416421 RSI: fffffffffffffff7 RDI: 0000000000000000 RBP: 0000000000000000 R08: 01ffffffffffffff R09: 00007ffd4c670fb0 R10: 00000000007702b0 R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffd4c670fb0 R14: 0000000000000000 R15: 00007ffd4c670fc0 Modules linked in: ---[ end trace 30f7c81df55d5d82 ]--- RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline] RIP: 0010:mm_update_next_owner+0x49b/0x7a0 kernel/exit.c:385 Code: 48 8d bd 48 03 00 00 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 f4 02 00 00 48 8b ad 48 03 00 00 4c 8d 7d 10 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 0f 85 cb 02 00 00 48 8b 45 10 48 8d a8 68 fa ff ff 49 RSP: 0018:ffffc90018517d20 EFLAGS: 00010a07 RAX: 1191919191919193 RBX: dffffc0000000000 RCX: ffffffff81459ed3 RDX: 0000000000000000 RSI: ffffffff81459ee1 RDI: ffff88800013e8e0 RBP: 8c8c8c8c8c8c8c8c R08: ffff8882123f0580 R09: fffffbfff1301219 R10: ffffffff898090c3 R11: fffffbfff1301218 R12: ffff88809552f800 R13: ffff88800013e1c0 R14: 0000000000000000 R15: 8c8c8c8c8c8c8c9c FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000400200 CR3: 000000020b913000 CR4: 00000000001426f0 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.