CVE-2022-49001 riscv: fix race when vmap stack overflow

In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the getoverflowstack to get the overflow stack...

CVE-2022-49001 riscv: fix race when vmap stack overflow

In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the getoverflowstack to get the overflow stack...