CVE-2021-47165
Description
In the Linux kernel, the following vulnerability has been resolved: drm/meson: fix shutdown crash when component not probed When main component is not probed, by example when the dw-hdmi module is not loaded yet or in probe defer, the following crash appears on shutdown: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000038 ... pc : meson_drv_shutdown+0x24/0x50 lr : platform_drv_shutdown+0x20/0x30 ... Call trace: meson_drv_shutdown+0x24/0x50 platform_drv_shutdown+0x20/0x30 device_shutdown+0x158/0x360 kernel_restart_prepare+0x38/0x48 kernel_restart+0x18/0x68 __do_sys_reboot+0x224/0x250 __arm64_sys_reboot+0x24/0x30 ... Simply check if the priv struct has been allocated before using it.
How to fix
- linux linux_kernel4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.14.226 ≤ v < 4.14.235, 4.19.181 ≤ v < 4.19.193, 5.4.106 ≤ v < 5.4.124, 5.10.24 ≤ v < 5.10.42, 5.12 ≤ v < 5.12.9, 5.13 | 4.14.235, 4.19.193, 5.4.124, 5.10.42, 5.12.9 |
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