Jiexun Wang d9ce4de05d Bluetooth: serialize accept_q access ...

[ Upstream commit e83f5e24da ]

bt_sock_poll() walks the accept queue without synchronization, while
child teardown can unlink the same socket and drop its last reference.
The unsynchronized accept queue walk has existed since the initial
Bluetooth import.

Protect accept_q with a dedicated lock for queue updates and polling.
Also rework bt_accept_dequeue() to take temporary child references under
the queue lock before dropping it and locking the child socket.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Reported-by: Jann Horn <jannh@google.com>
Reported-by: Yuan Tan <yuantan098@gmail.com>
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Reported-by: Xin Liu <bird@lzu.edu.cn>
Signed-off-by: Jiexun Wang <wangjiexun2025@gmail.com>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Signed-off-by: Jiexun Wang <wangjiexun2025@gmail.com>
Reviewed-by: Jann Horn <jannh@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2026-06-19 13:21:45 +02:00

..

bluetooth.h

Bluetooth: serialize accept_q access

2026-06-19 13:21:45 +02:00

hci_core.h

Bluetooth: hci_core: Fix use-after-free in vhci_flush()

2026-06-19 13:21:32 +02:00

hci_mon.h

…

hci_sock.h

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hci.h

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l2cap.h

Bluetooth: L2CAP: reject BR/EDR signaling packets over MTUsig

2026-06-19 13:21:37 +02:00

mgmt.h

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rfcomm.h

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sco.h

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