netdev - Re: [syzbot] memory leak in mgmt_cmd

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Date:   Tue, 24 Aug 2021 17:31:22 -0700
From:   syzbot <syzbot+4c4ffd1e1094dae61035@...kaller.appspotmail.com>
To:     davem@...emloft.net, johan.hedberg@...il.com, kuba@...nel.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        luiz.dentz@...il.com, marcel@...tmann.org, netdev@...r.kernel.org,
        phind.uet@...il.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] memory leak in mgmt_cmd_complete

syzbot has found a reproducer for the following issue on:

HEAD commit:    6e764bcd1cf7 Merge tag 'for-linus' of git://git.kernel.org..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=174af485300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=a938918bd15e088e
dashboard link: https://syzkaller.appspot.com/bug?extid=4c4ffd1e1094dae61035
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1355278d300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=150997c5300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+4c4ffd1e1094dae61035@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.730s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.730s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.780s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.780s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.840s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.840s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.900s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.900s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.950s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 25.950s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.010s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.010s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.060s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.070s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff88811858bb00 (size 232):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.120s)
  hex dump (first 32 bytes):
    d0 14 3d 18 81 88 ff ff d0 14 3d 18 81 88 ff ff  ..=.......=.....
    00 00 00 00 00 00 00 00 00 14 3d 18 81 88 ff ff  ..........=.....
  backtrace:
    [<ffffffff836e557f>] __alloc_skb+0x20f/0x280 net/core/skbuff.c:414
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

BUG: memory leak
unreferenced object 0xffff888111f7c600 (size 512):
  comm "kworker/u5:10", pid 8505, jiffies 4294950224 (age 26.120s)
  hex dump (first 32 bytes):
    01 00 03 00 07 00 05 00 00 82 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff836e544f>] kmalloc_reserve net/core/skbuff.c:355 [inline]
    [<ffffffff836e544f>] __alloc_skb+0xdf/0x280 net/core/skbuff.c:426
    [<ffffffff83d1c5ed>] alloc_skb include/linux/skbuff.h:1112 [inline]
    [<ffffffff83d1c5ed>] mgmt_cmd_complete+0x3d/0x1a0 net/bluetooth/mgmt_util.c:146
    [<ffffffff83cdc8ee>] send_settings_rsp net/bluetooth/mgmt.c:1129 [inline]
    [<ffffffff83cdc8ee>] settings_rsp+0x5e/0x170 net/bluetooth/mgmt.c:1282
    [<ffffffff83d1c8d6>] mgmt_pending_foreach+0x76/0xa0 net/bluetooth/mgmt_util.c:226
    [<ffffffff83ce80bc>] __mgmt_power_off+0x5c/0x1e0 net/bluetooth/mgmt.c:8583
    [<ffffffff83cb8786>] hci_dev_do_close+0x5b6/0x710 net/bluetooth/hci_core.c:1774
    [<ffffffff812636d9>] process_one_work+0x2c9/0x610 kernel/workqueue.c:2276
    [<ffffffff81263fc9>] worker_thread+0x59/0x5d0 kernel/workqueue.c:2422
    [<ffffffff8126d428>] kthread+0x188/0x1d0 kernel/kthread.c:319
    [<ffffffff810022cf>] ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295