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=ham 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 2C970C433E0 for ; Wed, 5 Aug 2020 16:23:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0E4E2206B6 for ; Wed, 5 Aug 2020 16:23:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726660AbgHEQXS (ORCPT ); Wed, 5 Aug 2020 12:23:18 -0400 Received: from mail-pf1-f197.google.com ([209.85.210.197]:50185 "EHLO mail-pf1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726335AbgHEQUC (ORCPT ); Wed, 5 Aug 2020 12:20:02 -0400 Received: by mail-pf1-f197.google.com with SMTP id 127so10091716pfx.17 for ; Wed, 05 Aug 2020 09:19:48 -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=avna9i89Ds5+HlHIO0jP2gsy42y6k6d4i5A6G0eC9Zg=; b=fTjhAqm1QW6o80ztM3Qix2gonIRfMfxyuP9X4K+nXlKbrfLKY/qqX/kCnLmJDLBxaM VYF/plLnXuJPZCRCEcgsfH9YZJM1vAzX87285XmNY9kJk+CwVUQRJQofQH470ekxkSRs mle7FlAR9l5Ul/sAjr97yfs4fqtLxciv9usHFzq34f2t8fsUNZGPnlP4sFc09oEDwiIE jTJaoJFm4h2nxsOjTGxNJdQA2m1wk21HTDCxeNhPmdZNDwTxqc8FDTfTqk83MEcVxpH9 48AGafwXD8by7CGP00iV2Skp4k8JO7WOpjm3d6BnHvRfItJJmBlDDcI23MP/G7Zl2yu2 NxXg== X-Gm-Message-State: AOAM532ov6o83ilY+vwiuEDrpCY6qzGHH0/hoISg42jibkIyo+TwnPsV PQpJnvzvUAG649/QjNg5lRBRPVPVJhg/9IRtJKpNfUcE+tFx X-Google-Smtp-Source: ABdhPJyx4yEzfPaYCDRlqOY3SOtYmFn8sbh8/x3+5nlNm2RDYZA9WGMYMn0ZKb0xJk3/Mq74bCnR7H5fZMI1spSxNxHREkmBWCcD MIME-Version: 1.0 X-Received: by 2002:a05:6602:24c2:: with SMTP id h2mr4088770ioe.198.1596643761947; Wed, 05 Aug 2020 09:09:21 -0700 (PDT) Date: Wed, 05 Aug 2020 09:09:21 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000438c6705ac23983f@google.com> Subject: BUG: unable to handle kernel paging request in lock_sock_nested From: syzbot To: davem@davemloft.net, johan.hedberg@gmail.com, kuba@kernel.org, linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, marcel@holtmann.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: ac3a0c84 Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=141a4c1a900000 kernel config: https://syzkaller.appspot.com/x/.config?x=c0cfcf935bcc94d2 dashboard link: https://syzkaller.appspot.com/bug?extid=3ea58ce4ad976e46ca65 compiler: gcc (GCC) 10.1.0-syz 20200507 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+3ea58ce4ad976e46ca65@syzkaller.appspotmail.com BUG: unable to handle page fault for address: fffffbfff32980d2 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 21ffe5067 P4D 21ffe5067 PUD 21ffe4067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 19427 Comm: kworker/0:15 Not tainted 5.8.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events l2cap_chan_timeout RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192 Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c RSP: 0018:ffffc90001ed78c0 EFLAGS: 00010082 RAX: fffffbfff32980d2 RBX: fffffbfff32980d3 RCX: ffffffff8159b005 RDX: fffffbfff32980d3 RSI: 0000000000000008 RDI: ffffffff994c0690 RBP: fffffbfff32980d2 R08: 0000000000000000 R09: ffffffff994c0697 R10: fffffbfff32980d2 R11: 0000000000000000 R12: ffff88806a3fc380 R13: ffff88806a3fcd12 R14: 0000000000000000 R15: ffff88806a3fcc50 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff32980d2 CR3: 000000009cb24000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:56 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] __lock_acquire+0x1025/0x56e0 kernel/locking/lockdep.c:4350 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:358 [inline] lock_sock_nested+0x3b/0x110 net/core/sock.c:3049 l2cap_sock_teardown_cb+0x88/0x400 net/bluetooth/l2cap_sock.c:1520 l2cap_chan_del+0xad/0x1300 net/bluetooth/l2cap_core.c:618 l2cap_chan_close+0x118/0xb10 net/bluetooth/l2cap_core.c:824 l2cap_chan_timeout+0x173/0x450 net/bluetooth/l2cap_core.c:436 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Modules linked in: CR2: fffffbfff32980d2 ---[ end trace 74995b61ea36495b ]--- RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0xdb/0x180 mm/kasan/generic.c:192 Code: 80 38 00 74 f2 48 89 c2 b8 01 00 00 00 48 85 d2 75 56 5b 5d 41 5c c3 48 85 d2 74 5e 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 50 <80> 38 00 74 f2 eb d4 41 bc 08 00 00 00 48 89 ea 45 29 dc 4d 8d 1c RSP: 0018:ffffc90001ed78c0 EFLAGS: 00010082 RAX: fffffbfff32980d2 RBX: fffffbfff32980d3 RCX: ffffffff8159b005 RDX: fffffbfff32980d3 RSI: 0000000000000008 RDI: ffffffff994c0690 RBP: fffffbfff32980d2 R08: 0000000000000000 R09: ffffffff994c0697 R10: fffffbfff32980d2 R11: 0000000000000000 R12: ffff88806a3fc380 R13: ffff88806a3fcd12 R14: 0000000000000000 R15: ffff88806a3fcc50 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff32980d2 CR3: 000000009cb24000 CR4: 00000000001406f0 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.