CVE-2022-50657

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> riscv: mm: add missing memcpy in kasan_init<br /> <br /> Hi Atish,<br /> <br /> It seems that the panic is due to the missing memcpy during kasan_init.<br /> Could you please check whether this patch is helpful?<br /> <br /> When doing kasan_populate, the new allocated base_pud/base_p4d should<br /> contain kasan_early_shadow_{pud, p4d}&amp;#39;s content. Add the missing memcpy<br /> to avoid page fault when read/write kasan shadow region.<br /> <br /> Tested on:<br /> - qemu with sv57 and CONFIG_KASAN on.<br /> - qemu with sv48 and CONFIG_KASAN on.