CVE-2026-43292 mm/vmalloc: prevent RCU stalls in kasan_release_vmalloc_node

In the Linux kernel, the following vulnerability has been resolved: mm/vmalloc: prevent RCU stalls in kasanreleasevmallocnode When CONFIGPAGEOWNER is enabled, freeing KASAN shadow pages during vmalloc cleanup triggers expensive stack unwinding that acquires RCU read locks. Processing a large...