CVE-2022-50714

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mt76: mt7921e: fix rmmod crash in driver reload test<br /> <br /> In insmod/rmmod stress test, the following crash dump shows up immediately.<br /> The problem is caused by missing mt76_dev in mt7921_pci_remove(). We<br /> should make sure the drvdata is ready before probe() finished.<br /> <br /> [168.862789] ==================================================================<br /> [168.862797] BUG: KASAN: user-memory-access in try_to_grab_pending+0x59/0x480<br /> [168.862805] Write of size 8 at addr 0000000000006df0 by task rmmod/5361<br /> [168.862812] CPU: 7 PID: 5361 Comm: rmmod Tainted: G OE 5.19.0-rc6 #1<br /> [168.862816] Hardware name: Intel(R) Client Systems NUC8i7BEH/NUC8BEB, 05/04/2020<br /> [168.862820] Call Trace:<br /> [168.862822] <br /> [168.862825] dump_stack_lvl+0x49/0x63<br /> [168.862832] print_report.cold+0x493/0x6b7<br /> [168.862845] kasan_report+0xa7/0x120<br /> [168.862857] kasan_check_range+0x163/0x200<br /> [168.862861] __kasan_check_write+0x14/0x20<br /> [168.862866] try_to_grab_pending+0x59/0x480<br /> [168.862870] __cancel_work_timer+0xbb/0x340<br /> [168.862898] cancel_work_sync+0x10/0x20<br /> [168.862902] mt7921_pci_remove+0x61/0x1c0 [mt7921e]<br /> [168.862909] pci_device_remove+0xa3/0x1d0<br /> [168.862914] device_remove+0xc4/0x170<br /> [168.862920] device_release_driver_internal+0x163/0x300<br /> [168.862925] driver_detach+0xc7/0x1a0<br /> [168.862930] bus_remove_driver+0xeb/0x2d0<br /> [168.862935] driver_unregister+0x71/0xb0<br /> [168.862939] pci_unregister_driver+0x30/0x230<br /> [168.862944] mt7921_pci_driver_exit+0x10/0x1b [mt7921e]<br /> [168.862949] __x64_sys_delete_module+0x2f9/0x4b0<br /> [168.862968] do_syscall_64+0x38/0x90<br /> [168.862973] entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> Test steps:<br /> 1. insmode<br /> 2. do not ifup<br /> 3. rmmod quickly (within 1 second)