CVE-2021-47165

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/meson: fix shutdown crash when component not probed<br /> <br /> When main component is not probed, by example when the dw-hdmi module is<br /> not loaded yet or in probe defer, the following crash appears on shutdown:<br /> <br /> Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038<br /> ...<br /> pc : meson_drv_shutdown+0x24/0x50<br /> lr : platform_drv_shutdown+0x20/0x30<br /> ...<br /> Call trace:<br /> meson_drv_shutdown+0x24/0x50<br /> platform_drv_shutdown+0x20/0x30<br /> device_shutdown+0x158/0x360<br /> kernel_restart_prepare+0x38/0x48<br /> kernel_restart+0x18/0x68<br /> __do_sys_reboot+0x224/0x250<br /> __arm64_sys_reboot+0x24/0x30<br /> ...<br /> <br /> Simply check if the priv struct has been allocated before using it.