x86/kexec: Fix bug with call depth tracking
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Fix bug with call depth tracking The call to cc_platform_has() triggers a fault and system crash if call depth tracking is active because the GS segment has been reset by load_segments() and GS_BASE is now 0 but call depth tracking uses per-CPU variables to operate. Call cc_platform_has() earlier in the function when GS is still valid. [ bp: Massage. ]
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Fix bug with call depth tracking The call to cc_platform_has() triggers a fault and system crash if call depth tracking is active because the GS segment has been reset by load_segments() and GS_BASE is now 0 but call depth tracking uses per-CPU variables to operate. Call cc_platform_has() earlier in the function when GS is still valid. [ bp: Massage. ]
05 / REFERENCES
Further evidence
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/2cfb464669b645a9b98478b74f2bcea9860dcff1
- https://git.kernel.org/stable/c/93c1800b3799f17375989b0daf76497dd3e80922
- https://git.kernel.org/stable/c/d91ddd05082691e69b30744825d18ae799293258
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/40xxx/CVE-2024-40944.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-40944