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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS autolearn=unavailable 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 A5648C18E5B for ; Tue, 17 Mar 2020 16:46:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8337E20724 for ; Tue, 17 Mar 2020 16:46:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726809AbgCQQqR (ORCPT ); Tue, 17 Mar 2020 12:46:17 -0400 Received: from mail-io1-f69.google.com ([209.85.166.69]:52638 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726016AbgCQQqQ (ORCPT ); Tue, 17 Mar 2020 12:46:16 -0400 Received: by mail-io1-f69.google.com with SMTP id e21so1703137ios.19 for ; Tue, 17 Mar 2020 09:46:14 -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=yjQuUX6jv/gljx+7zPrg/SXXV6Qnx8ZlLfuj0BggKs0=; b=LOiOPGmxsLje6Umis/ex6L/gooXsqtN1BbNMlwaKvDj6sxFuiwN+16F1bedsLEVx8q IjaOEV9+4gLe44ZwKoGt7Y/2Z2ygL+v5Hy60FjCLHNPLvaTYz2enxQSL8pjRHv5tO0gx 7+xYQc17hqeTuz8IFQO+XS5Nu3ZP1IvnqUcYZ2ueoiOYtmukNrvHhaHidPljA8Xs59do LZErtJoTyxPsyyaKTVubbqwjKHaxFyGn1oUIMgGvcPdLylkHzBKSLJw36zSp7q3PUAFL OB7twjiuFiX/KNCOk8agWpLVOrwhVXZPZragNZHFvIkjIaAtjun/RrvsKP2PAKKklfe6 /exw== X-Gm-Message-State: ANhLgQ14xhoEiG0cqo9KvhIRUxiUauvbMp93lAHiAjLrnnocjuWrSEe0 jty06sCddoFxs0fVHaoNn36um6WIvOqPs4qXt6n6qUBqLr/G X-Google-Smtp-Source: ADFU+vuluMugisi1KFOmKHsMKGe677zO6tUUtJeBPH/BSb7LzPkFrVkws6nHHfjdJJ8p+kc7TsLXloh6ylH3Sc2eFyJJ+uGo23m6 MIME-Version: 1.0 X-Received: by 2002:a6b:d207:: with SMTP id q7mr4871624iob.49.1584463573936; Tue, 17 Mar 2020 09:46:13 -0700 (PDT) Date: Tue, 17 Mar 2020 09:46:13 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007bf0e105a10facff@google.com> Subject: general protection fault in tlb_finish_mmu From: syzbot To: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, npiggin@gmail.com, peterz@infradead.org, syzkaller-bugs@googlegroups.com, will@kernel.org 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: 3cc6e2c5 Merge tag 'for-linus-5.6-2' of git://github.com/c.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16e3bb65e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=c2e311dba9a02ba9 dashboard link: https://syzkaller.appspot.com/bug?extid=dd9e89c646e1d8c05c62 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+dd9e89c646e1d8c05c62@syzkaller.appspotmail.com general protection fault, probably for non-canonical address 0xe0000a0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000700000000000-0x0000700000000007] CPU: 0 PID: 9753 Comm: syz-executor.2 Not tainted 5.6.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tlb_batch_list_free mm/mmu_gather.c:60 [inline] RIP: 0010:tlb_finish_mmu+0xd8/0x3c0 mm/mmu_gather.c:331 Code: 85 99 02 00 00 49 bd 00 00 00 00 00 fc ff df 49 8b 6c 24 30 48 85 ed 75 05 eb 2d 48 89 dd e8 8f 23 d0 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 4f 02 00 00 48 8b 5d 00 31 f6 48 89 ef e8 9f RSP: 0018:ffffc900062efc30 EFLAGS: 00010206 RAX: 00000e0000000000 RBX: 0000700000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81a1f201 RDI: 0000000000000282 RBP: 0000700000000000 R08: ffff88804a694540 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900062efc80 R13: dffffc0000000000 R14: ffffc900062efc80 R15: ffff888045d94500 FS: 00000000020f0940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc866ef000 CR3: 00000000a916c000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: exit_mmap+0x2ca/0x510 mm/mmap.c:3128 __mmput kernel/fork.c:1082 [inline] mmput+0x168/0x4b0 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0xa51/0x2dd0 kernel/exit.c:788 do_group_exit+0x125/0x340 kernel/exit.c:899 __do_sys_exit_group kernel/exit.c:910 [inline] __se_sys_exit_group kernel/exit.c:908 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:908 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c679 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:0000000000c7fae8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000000045c679 RDX: 0000000000416151 RSI: 0000000000c870f0 RDI: 0000000000000000 RBP: 00000000004c2040 R08: 000000000000000c R09: 0000000000c7fbf0 R10: 00000000020f0940 R11: 0000000000000246 R12: 000000000076bfa0 R13: 0000000000000003 R14: 0000000000000001 R15: 000000000076bfac Modules linked in: ---[ end trace cb94cd759cc2503d ]--- RIP: 0010:tlb_batch_list_free mm/mmu_gather.c:60 [inline] RIP: 0010:tlb_finish_mmu+0xd8/0x3c0 mm/mmu_gather.c:331 Code: 85 99 02 00 00 49 bd 00 00 00 00 00 fc ff df 49 8b 6c 24 30 48 85 ed 75 05 eb 2d 48 89 dd e8 8f 23 d0 ff 48 89 e8 48 c1 e8 03 <42> 80 3c 28 00 0f 85 4f 02 00 00 48 8b 5d 00 31 f6 48 89 ef e8 9f RSP: 0018:ffffc900062efc30 EFLAGS: 00010206 RAX: 00000e0000000000 RBX: 0000700000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff81a1f201 RDI: 0000000000000282 RBP: 0000700000000000 R08: ffff88804a694540 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900062efc80 R13: dffffc0000000000 R14: ffffc900062efc80 R15: ffff888045d94500 FS: 00000000020f0940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc866ef000 CR3: 00000000a916c000 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.