CVE-2023-53694
- Source
- https://cve.org/CVERecord?id=CVE-2023-53694
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-53694.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-53694
- Downstream
- Published
- 2025-10-22T13:23:35.869Z
- Modified
- 2026-04-02T09:44:53.647197Z
- Summary
- riscv: ftrace: Fixup panic by disabling preemption
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
riscv: ftrace: Fixup panic by disabling preemption
In RISCV, we must use an AUIPC + JALR pair to encode an immediate, forming a jump that jumps to an address over 4K. This may cause errors if we want to enable kernel preemption and remove dependency from patching code with stop_machine(). For example, if a task was switched out on auipc. And, if we changed the ftrace function before it was switched back, then it would jump to an address that has updated 11:0 bits mixing with previous XLEN:12 part.
p: patched area performed by dynamic ftrace ftraceprologue: p| REGS ra, -SZREG(sp) p| auipc ra, 0x? ------------> preempted ... change ftrace function ... p| jalr -?(ra) <------------- switched back p| REG_L ra, -SZREG(sp) func: xxx ret
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53694.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/20a7510e781084364691b4962de31de758194cc9
- https://git.kernel.org/stable/c/84cfcf240f4a577733b1d98fcd2611a611612b03
- https://git.kernel.org/stable/c/8547649981e6631328cd64f583667501ae385531
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53694.json
- https://nvd.nist.gov/vuln/detail/CVE-2023-53694
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git