Bluetooth: btnxpuart: Fix btnxpuart_close

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btnxpuart: Fix btnxpuart_close Fix scheduling while atomic BUG in btnxpuart_close(), properly purge the transmit queue and free the receive skb. [ 10.973809] BUG: scheduling while atomic: kworker/u9:0/80/0x00000002 ... [ 10.980740] CPU: 3 PID: 80 Comm: kworker/u9:0 Not tainted 6.8.0-rc7-0.0.0-devel-00005-g61fdfceacf09 #1 [ 10.980751] Hardware name: Toradex Verdin AM62 WB on Dahlia Board (DT) [ 10.980760] Workqueue: hci0 hci_power_off [bluetooth] [ 10.981169] Call trace: ... [ 10.981363] uart_update_mctrl+0x58/0x78 [ 10.981373] uart_dtr_rts+0x104/0x114 [ 10.981381] tty_port_shutdown+0xd4/0xdc [ 10.981396] tty_port_close+0x40/0xbc [ 10.981407] uart_close+0x34/0x9c [ 10.981414] ttyport_close+0x50/0x94 [ 10.981430] serdev_device_close+0x40/0x50 [ 10.981442] btnxpuart_close+0x24/0x98 [btnxpuart] [ 10.981469] hci_dev_close_sync+0x2d8/0x718 [bluetooth] [ 10.981728] hci_dev_do_close+0x2c/0x70 [bluetooth] [ 10.981862] hci_power_off+0x20/0x64 [bluetooth]

References

• https://git.kernel.org/stable/c/d4e2365b07f1ae1f811a915b514caef5b2d6581e
• https://git.kernel.org/stable/c/586e099c93fe26b7bd40593979532f507ed9f6a4
• https://git.kernel.org/stable/c/74bcf708775c405f7fb6ed776ccd3e1957f38a52
• https://git.kernel.org/stable/c/664130c0b0309b360bc5bdd40a30604a9387bde8