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=-9.0 required=3.0 tests=BAYES_00,FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 43CCAC433E2 for ; Mon, 31 Aug 2020 19:48:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 277032083E for ; Mon, 31 Aug 2020 19:48:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728252AbgHaTsQ (ORCPT ); Mon, 31 Aug 2020 15:48:16 -0400 Received: from mail-il1-f199.google.com ([209.85.166.199]:48939 "EHLO mail-il1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727861AbgHaTsO (ORCPT ); Mon, 31 Aug 2020 15:48:14 -0400 Received: by mail-il1-f199.google.com with SMTP id p78so5940052ill.15 for ; Mon, 31 Aug 2020 12:48:14 -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=cK+cTlHrBH0I8dtFbbTlN1a0PMAtRS8/eA1z+aa58yA=; b=pQhuYk5Uo7WxKQyiVoi+LTPRGkHKlJPRNBHbG3BlygSm6zmup2+cP7uZukeI7HxWnX kP2vUq0deL0SBP9NjNuoDfUGPQD23u+1Phmlg48Hv0ggTnO/iMUitQO4aF4BIySD38a7 Oow+qRVxfTIncY+yFhHd73mytztIlhlQboYxIh+T5BMdAfSuZ0Hv81oi9fdMTXD0WlUg L0miww6m1hEhghXfqjjjMvsg2qOV3Omcx1jK+N/7rp//Hec4qPVEtV+OoaLGbEkKJr0z rSvyMvizV2/F/Km5CQa8Mv+sGdU5ua+udS+HT723Z68isorrAosUoWTzyXGHCeCbmmOO 5ROw== X-Gm-Message-State: AOAM5307FrxixvGYWn6H+NgpMxG0Q/FTMndO86pTYHyPmqbJTNzgleUn Adu404Gf0rZFScuW8GzWzs8qYfDtWQOxQQkwBnaAw0untYXN X-Google-Smtp-Source: ABdhPJxsRKfEFgHCrDNCyrUbVf348EO4W3juNVBYdrE4wLSpbYKHk4dges1Kr5WL+zj+suSdPTbaWeY9UumBHULiDtvlNB3TrhHL MIME-Version: 1.0 X-Received: by 2002:a92:d4cf:: with SMTP id o15mr2870758ilm.25.1598903293869; Mon, 31 Aug 2020 12:48:13 -0700 (PDT) Date: Mon, 31 Aug 2020 12:48:13 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000dc862405ae31ae9b@google.com> Subject: general protection fault in sock_close From: syzbot To: davem@davemloft.net, kuba@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, maz@kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8" Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 15bc20c6 Merge tag 'tty-5.9-rc3' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16a85669900000 kernel config: https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650 dashboard link: https://syzkaller.appspot.com/bug?extid=e24baf53dc389927a7c3 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=127d3c99900000 The issue was bisected to: commit a9ed4a6560b8562b7e2e2bed9527e88001f7b682 Author: Marc Zyngier Date: Wed Aug 19 16:12:17 2020 +0000 epoll: Keep a reference on files added to the check list bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1374d7c5900000 final oops: https://syzkaller.appspot.com/x/report.txt?x=10f4d7c5900000 console output: https://syzkaller.appspot.com/x/log.txt?x=1774d7c5900000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e24baf53dc389927a7c3@syzkaller.appspotmail.com Fixes: a9ed4a6560b8 ("epoll: Keep a reference on files added to the check list") general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 10933 Comm: syz-executor.0 Not tainted 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sock_release net/socket.c:596 [inline] RIP: 0010:sock_close+0xc5/0x260 net/socket.c:1277 Code: fc ff df 41 80 3c 04 00 74 08 4c 89 ff e8 e3 cf 49 fb 49 8b 1f 48 83 c3 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 bd cf 49 fb 4c 89 f7 ff 13 49 8d 5e RSP: 0018:ffffc9000535fe10 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffffff88bbc748 R08: dffffc0000000000 R09: ffffed1010361edf R10: ffffed1010361edf R11: 0000000000000000 R12: 1ffff11010361eac R13: ffff888081b0f6e0 R14: ffff888081b0f540 R15: ffff888081b0f560 FS: 00007fad45047700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fad45025db8 CR3: 0000000084c1d000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __fput+0x34f/0x7b0 fs/file_table.c:281 task_work_run+0x137/0x1c0 kernel/task_work.c:141 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:140 [inline] exit_to_user_mode_prepare+0xfa/0x1b0 kernel/entry/common.c:167 syscall_exit_to_user_mode+0x5e/0x1a0 kernel/entry/common.c:242 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45d5b9 Code: 5d b4 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 2b b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fad45046c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: 0000000000000000 RBX: 0000000000002ac0 RCX: 000000000045d5b9 RDX: 0000000000000004 RSI: 0000000000000001 RDI: 0000000000000005 RBP: 000000000118cf88 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200003c0 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffd8c03abcf R14: 00007fad450479c0 R15: 000000000118cf4c Modules linked in: ---[ end trace a8eab99154db8026 ]--- RIP: 0010:__sock_release net/socket.c:596 [inline] RIP: 0010:sock_close+0xc5/0x260 net/socket.c:1277 Code: fc ff df 41 80 3c 04 00 74 08 4c 89 ff e8 e3 cf 49 fb 49 8b 1f 48 83 c3 10 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 bd cf 49 fb 4c 89 f7 ff 13 49 8d 5e RSP: 0018:ffffc9000535fe10 EFLAGS: 00010202 RAX: 0000000000000002 RBX: 0000000000000010 RCX: dffffc0000000000 RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffffffff88bbc748 R08: dffffc0000000000 R09: ffffed1010361edf R10: ffffed1010361edf R11: 0000000000000000 R12: 1ffff11010361eac R13: ffff888081b0f6e0 R14: ffff888081b0f540 R15: ffff888081b0f560 FS: 00007fad45047700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e37205010 CR3: 0000000084c1d000 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches