CVE-2023-52978: 
Linux Kernel vulnerability analysis and mitigation

A vulnerability was identified in the Linux kernel affecting the RISC-V kprobe functionality. The issue was discovered when probing an illegal position would cause a kernel panic, particularly when CONFIGRISCVISA_C is disabled (NVD).

The vulnerability occurs when the kprobe's ebreak instruction breaks the kernel's original code during probing of an illegal position. This can happen in scenarios such as when probing kernelclone+0x16 with CONFIGRISCVISAC disabled, leading to a kernel stack corruption and subsequent panic. The issue manifests with error messages indicating 'Kernel stack is corrupted in: _dosys_newfstatat+0xb8/0xb8' (NVD).

When exploited, this vulnerability results in a kernel panic, effectively causing a denial of service condition. The issue specifically affects systems running the Linux kernel on RISC-V architecture when using kprobes (NVD).

The vulnerability has been resolved by adding archcheckkprobe in archpreparekprobe to prevent probing of illegal positions, such as the middle of an instruction. This patch ensures that the kernel validates probe positions before execution (NVD).