CVE-2022-50468

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> platform/chrome: cros_usbpd_notify: Fix error handling in cros_usbpd_notify_init()<br /> <br /> The following WARNING message was given when rmmod cros_usbpd_notify:<br /> <br /> Unexpected driver unregister!<br /> WARNING: CPU: 0 PID: 253 at drivers/base/driver.c:270 driver_unregister+0x8a/0xb0<br /> Modules linked in: cros_usbpd_notify(-)<br /> CPU: 0 PID: 253 Comm: rmmod Not tainted 6.1.0-rc3 #24<br /> ...<br /> Call Trace:<br /> <br /> cros_usbpd_notify_exit+0x11/0x1e [cros_usbpd_notify]<br /> __x64_sys_delete_module+0x3c7/0x570<br /> ? __ia32_sys_delete_module+0x570/0x570<br /> ? lock_is_held_type+0xe3/0x140<br /> ? syscall_enter_from_user_mode+0x17/0x50<br /> ? rcu_read_lock_sched_held+0xa0/0xd0<br /> ? syscall_enter_from_user_mode+0x1c/0x50<br /> do_syscall_64+0x37/0x90<br /> entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> RIP: 0033:0x7f333fe9b1b7<br /> <br /> The reason is that the cros_usbpd_notify_init() does not check the return<br /> value of platform_driver_register(), and the cros_usbpd_notify can<br /> install successfully even if platform_driver_register() failed.<br /> <br /> Fix by checking the return value of platform_driver_register() and<br /> unregister cros_usbpd_notify_plat_driver when it failed.