Description
In the Linux kernel, the following vulnerability has been resolved: x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper Since 923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot") resctrl_cpu_detect() has been moved from common CPU initialization code to the vendor-specific BSP init helper, while Hygon didn't put that call in their code. This triggers a division by zero fault during early booting stage on our machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale. Add the missing resctrl_cpu_detect() in the Hygon BSP init helper. [ bp: Massage commit message. ]
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < 62f12cde10118253348a7540e85606869bd69432affected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < 873f32201df8876bdb2563e3187e79149427cab4affected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < fb81222c1559f89bfe3aa1010f6d112531d55353affected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < 7207923d8453ebfb35667c1736169f2dd796772eaffected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < a9e5924daa954c9f585c1ca00358afe71d6781c4affected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < d23264c257a70dbe021b43b3bc2ee16134cd2c69affected923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 to < d8df126349dad855cdfedd6bbf315bad2e901c2faffected
Linux Linux
Default version status: affected
5.8affected0 to < 5.8unaffected5.10.242 to ≤ 5.10.*unaffected5.15.190 to ≤ 5.15.*unaffected6.1.149 to ≤ 6.1.*unaffected6.6.103 to ≤ 6.6.*unaffected6.12.44 to ≤ 6.12.*unaffected6.16.4 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/62f12cde10118253348a7540e85606869bd69432 ↗
- https://git.kernel.org/stable/c/873f32201df8876bdb2563e3187e79149427cab4 ↗
- https://git.kernel.org/stable/c/fb81222c1559f89bfe3aa1010f6d112531d55353 ↗
- https://git.kernel.org/stable/c/7207923d8453ebfb35667c1736169f2dd796772e ↗
- https://git.kernel.org/stable/c/a9e5924daa954c9f585c1ca00358afe71d6781c4 ↗
- https://git.kernel.org/stable/c/d23264c257a70dbe021b43b3bc2ee16134cd2c69 ↗
- https://git.kernel.org/stable/c/d8df126349dad855cdfedd6bbf315bad2e901c2f ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗