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. ]
Product status
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before 62f12cde10118253348a7540e85606869bd69432
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before 873f32201df8876bdb2563e3187e79149427cab4
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before fb81222c1559f89bfe3aa1010f6d112531d55353
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before 7207923d8453ebfb35667c1736169f2dd796772e
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before a9e5924daa954c9f585c1ca00358afe71d6781c4
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before d23264c257a70dbe021b43b3bc2ee16134cd2c69
923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (git) before d8df126349dad855cdfedd6bbf315bad2e901c2f
5.8
Any version before 5.8
5.10.242 (semver)
5.15.190 (semver)
6.1.149 (semver)
6.6.103 (semver)
6.12.44 (semver)
6.16.4 (semver)
6.17 (original_commit_for_fix)
References
git.kernel.org/...c/62f12cde10118253348a7540e85606869bd69432
git.kernel.org/...c/873f32201df8876bdb2563e3187e79149427cab4
git.kernel.org/...c/fb81222c1559f89bfe3aa1010f6d112531d55353
git.kernel.org/...c/7207923d8453ebfb35667c1736169f2dd796772e
git.kernel.org/...c/a9e5924daa954c9f585c1ca00358afe71d6781c4
git.kernel.org/...c/d23264c257a70dbe021b43b3bc2ee16134cd2c69
git.kernel.org/...c/d8df126349dad855cdfedd6bbf315bad2e901c2f
