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_DIGITS, 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 C4904C10F00 for ; Sat, 7 Mar 2020 05:40:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A38FD2070A for ; Sat, 7 Mar 2020 05:40:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726252AbgCGFkN (ORCPT ); Sat, 7 Mar 2020 00:40:13 -0500 Received: from mail-il1-f197.google.com ([209.85.166.197]:48228 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726072AbgCGFkM (ORCPT ); Sat, 7 Mar 2020 00:40:12 -0500 Received: by mail-il1-f197.google.com with SMTP id c1so3246913ilj.15 for ; Fri, 06 Mar 2020 21:40:12 -0800 (PST) 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=qgfToczf7DEQuzSkGPQXLwPPopcDsBOkFi/RISrdjEg=; b=MVU+FGouo3vE8fajJzYoFWOeHf19vbGEpzAtQZVHZ9Q9igDinJf2iG43ONe1Vr1EDT L+jk4tgQRE76Qzu9gTZX0X0RpHLK+tEIDGi63LenZLKGq3k7JBWhE5LDdDGQyhaFMIPa Uti0ArJ0aB3Y/IIXQ0G6CL3NJh9zXnPQnOQi7SSvzC9V9Vf+WYVTDMjPq8CDcszX8bEW VLQjs/VHqAhTWAGQpVM5coNggMKqGdehrdrWbrd7/xkqoGtjOh+qFfDlQvsbhqh7oNIV 4O/QHyfQrA/SjRbeo7XLM5zvQL9Dg/LWLd/YePPr9270jj9m3dBA/dK8jsL5Qbct+ZGV 5zUg== X-Gm-Message-State: ANhLgQ1zIzEFyKG6QzIa21AsdRqY4uiIw58EUjXMRb5HTSEcci2F0nTP 1xWYLhjrpmn5ScGe/Auz8VMBkEw1ZckJQuAYS5j8fxqqpFAT X-Google-Smtp-Source: ADFU+vtm0KKw8dNW9tqKxlP/M6gMnwlkK7/bAKoxLPVsGLBR3MWu0u/FfLh16MY8r1ycH0aJdAbWPF2qmQDCK3Aq4zKV/2mFcVCE MIME-Version: 1.0 X-Received: by 2002:a6b:f60f:: with SMTP id n15mr5740254ioh.32.1583559612127; Fri, 06 Mar 2020 21:40:12 -0800 (PST) Date: Fri, 06 Mar 2020 21:40:12 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000295deb05a03d3415@google.com> Subject: WARNING: ODEBUG bug in rfcomm_dev_ioctl 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: 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: fb279f4e Merge branch 'i2c/for-current-fixed' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=168c481de00000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b13b05f0e61d957 dashboard link: https://syzkaller.appspot.com/bug?extid=4496e82090657320efc6 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) 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+4496e82090657320efc6@syzkaller.appspotmail.com ------------[ cut here ]------------ ODEBUG: free active (active state 0) object type: timer_list hint: rfcomm_dlc_timeout+0x0/0xc0 net/bluetooth/rfcomm/core.c:300 WARNING: CPU: 0 PID: 9181 at lib/debugobjects.c:488 debug_print_object lib/debugobjects.c:485 [inline] WARNING: CPU: 0 PID: 9181 at lib/debugobjects.c:488 __debug_check_no_obj_freed lib/debugobjects.c:967 [inline] WARNING: CPU: 0 PID: 9181 at lib/debugobjects.c:488 debug_check_no_obj_freed+0x45c/0x640 lib/debugobjects.c:998 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9181 Comm: syz-executor.3 Not tainted 5.6.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1e9/0x30e lib/dump_stack.c:118 panic+0x264/0x7a0 kernel/panic.c:221 __warn+0x209/0x210 kernel/panic.c:582 report_bug+0x1ac/0x2d0 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:267 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:debug_print_object lib/debugobjects.c:485 [inline] RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:967 [inline] RIP: 0010:debug_check_no_obj_freed+0x45c/0x640 lib/debugobjects.c:998 Code: 74 08 4c 89 f7 e8 64 2d 18 fe 4d 8b 06 48 c7 c7 53 10 d1 88 48 c7 c6 0f 01 cf 88 48 89 da 89 e9 4d 89 f9 31 c0 e8 c4 cd ae fd <0f> 0b 48 ba 00 00 00 00 00 fc ff df ff 05 c6 39 b1 05 48 8b 5c 24 RSP: 0018:ffffc90001907c88 EFLAGS: 00010046 RAX: 72f8f847df918a00 RBX: ffffffff88d4edca RCX: 0000000000040000 RDX: ffffc90011373000 RSI: 0000000000013ee9 RDI: 0000000000013eea RBP: 0000000000000000 R08: ffffffff815e1276 R09: ffffed1015d04592 R10: ffffed1015d04592 R11: 0000000000000000 R12: ffff88808ea6fbac R13: ffffffff8b592e40 R14: ffffffff890ddc78 R15: ffffffff873dcc50 kfree+0xfc/0x220 mm/slab.c:3756 rfcomm_dlc_put include/net/bluetooth/rfcomm.h:258 [inline] __rfcomm_create_dev net/bluetooth/rfcomm/tty.c:417 [inline] rfcomm_create_dev net/bluetooth/rfcomm/tty.c:486 [inline] rfcomm_dev_ioctl+0xe37/0x2340 net/bluetooth/rfcomm/tty.c:588 rfcomm_sock_ioctl+0x79/0xa0 net/bluetooth/rfcomm/sock.c:902 sock_do_ioctl+0x7b/0x260 net/socket.c:1053 sock_ioctl+0x4aa/0x690 net/socket.c:1204 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl fs/ioctl.c:763 [inline] __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:770 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c4a9 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:00007fd490578c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd4905796d4 RCX: 000000000045c4a9 RDX: 0000000020000100 RSI: 00000000400452c8 RDI: 0000000000000004 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000317 R14: 00000000004c5443 R15: 000000000076bf2c Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.