linux-kernel - [kernel PATCH v2 0/1] Clear workqueue to avoid use-after-free

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 24 Feb 2023 11:53:12 -0800
From:   Zhengping Jiang <jiangzp@...gle.com>
To:     linux-bluetooth@...r.kernel.org, marcel@...tmann.org,
        luiz.dentz@...il.com
Cc:     mmandlik@...gle.com, chromeos-bluetooth-upstreaming@...omium.org,
        Zhengping Jiang <jiangzp@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [kernel PATCH v2 0/1] Clear workqueue to avoid use-after-free


After the hci_sync rework, cmd_sync_work was cleared when calling
hci_unregister_dev, but not when powering off the adapter.
Use-after-free errors happen when a work is still scheduled
when cmd is freed by __mgmt_power_off.

Changes in v2:
- Add function to clear the queue without stop the timer

Changes in v1:
- Clear cmd_sync_work queue before clearing the mgmt cmd list

Zhengping Jiang (1):
  Bluetooth: hci_sync: clear workqueue before clear mgmt cmd

 net/bluetooth/hci_sync.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

-- 
2.39.2.722.g9855ee24e9-goog