CVE-2022-49298

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

staging: rtl8712: fix uninit-value in r871xudrvinit()

When 'tmpU1b' returns from r8712read8(padapter, EE9346CR) is 0, 'mac[6]' will not be initialized.

BUG: KMSAN: uninit-value in r871xudrvinit+0x2d54/0x3070 drivers/staging/rtl8712/usbintf.c:541 r871xudrvinit+0x2d54/0x3070 drivers/staging/rtl8712/usbintf.c:541 usbprobeinterface+0xf19/0x1600 drivers/usb/core/driver.c:396 reallyprobe+0x653/0x14b0 drivers/base/dd.c:596 _driverprobedevice+0x3e9/0x530 drivers/base/dd.c:752 driverprobedevice drivers/base/dd.c:782 [inline] _deviceattachdriver+0x79f/0x1120 drivers/base/dd.c:899 busforeachdrv+0x2d6/0x3f0 drivers/base/bus.c:427 _deviceattach+0x593/0x8e0 drivers/base/dd.c:970 deviceinitialprobe+0x4a/0x60 drivers/base/dd.c:1017 busprobedevice+0x17b/0x3e0 drivers/base/bus.c:487 deviceadd+0x1fff/0x26e0 drivers/base/core.c:3405 usbsetconfiguration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 usbgenericdriverprobe+0x13c/0x300 drivers/usb/core/generic.c:238 usbprobedevice+0x309/0x570 drivers/usb/core/driver.c:293 reallyprobe+0x653/0x14b0 drivers/base/dd.c:596 _driverprobedevice+0x3e9/0x530 drivers/base/dd.c:752 driverprobedevice drivers/base/dd.c:782 [inline] _deviceattachdriver+0x79f/0x1120 drivers/base/dd.c:899 busforeachdrv+0x2d6/0x3f0 drivers/base/bus.c:427 _deviceattach+0x593/0x8e0 drivers/base/dd.c:970 deviceinitialprobe+0x4a/0x60 drivers/base/dd.c:1017 busprobedevice+0x17b/0x3e0 drivers/base/bus.c:487 deviceadd+0x1fff/0x26e0 drivers/base/core.c:3405 usbnewdevice+0x1b8e/0x2950 drivers/usb/core/hub.c:2566 hubportconnect drivers/usb/core/hub.c:5358 [inline] hubportconnectchange drivers/usb/core/hub.c:5502 [inline] portevent drivers/usb/core/hub.c:5660 [inline] hubevent+0x58e3/0x89e0 drivers/usb/core/hub.c:5742 processonework+0xdb6/0x1820 kernel/workqueue.c:2307 workerthread+0x10b3/0x21e0 kernel/workqueue.c:2454 kthread+0x3c7/0x500 kernel/kthread.c:377 retfrom_fork+0x1f/0x30

Local variable mac created at: r871xudrvinit+0x1771/0x3070 drivers/staging/rtl8712/usbintf.c:394 usbprobe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396

KMSAN: uninit-value in r871xudrvinit https://syzkaller.appspot.com/bug?id=3cd92b1d85428b128503bfa7a250294c9ae00bd8