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Change History

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: af_bluetooth: Fix deadlock

Attemting to do sock_lock on .recvmsg may cause a deadlock as shown
bellow, so instead of using sock_sock this uses sk_receive_queue.lock
on bt_sock_ioctl to avoid the UAF:

INFO: task kworker/u9:1:121 blocked for more than 30 seconds.
      Not tainted 6.7.6-lemon #183
Workqueue: hci0 hci_rx_work
Call Trace:
 <TASK>
 __schedule+0x37d/0xa00
 schedule+0x32/0xe0
 __lock_sock+0x68/0xa0
 ? __p

kernel.org https://git.kernel.org/stable/c/2c9e2df022ef8b9d7fac58a04a2ef4ed25288955 [No types assigned]

kernel.org https://git.kernel.org/stable/c/64be3c6154886200708da0dfe259705fb992416c [No types assigned]

kernel.org https://git.kernel.org/stable/c/817e8138ce86001b2fa5c63d6ede756e205a01f7 [No types assigned]

kernel.org https://git.kernel.org/stable/c/cb8adca52f306563d958a863bb0cbae9c184d1ae [No types assigned]

kernel.org https://git.kernel.org/stable/c/f7b94bdc1ec107c92262716b073b3e816d4784fb [No types assigned]