x86/mm: Recompute physical address for every page of per-CPU CEA mapping

Recompute the physical address for each per-CPU page in the CPU entry area, a recent commit inadvertantly modified cea_map_percpu_pages() such that every PTE is mapped to the physical address of the first page. Fixes: 9fd429c ("x86/kasan: Map shadow for percpu pages on demand") Cc: Andrey Ryabinin <[email protected]> Signed-off-by: Sean Christopherson <[email protected]>
sean-jc · Nov 9, 2022 · 34a85ba · 34a85ba
1 parent 0008712
commit 34a85ba
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c
@@ -97,7 +97,7 @@ cea_map_percpu_pages(void *cea_vaddr, void *ptr, int pages, pgprot_t prot)
 					early_pfn_to_nid(PFN_DOWN(pa)));
 
 	for ( ; pages; pages--, cea_vaddr+= PAGE_SIZE, ptr += PAGE_SIZE)
-		cea_set_pte(cea_vaddr, pa, prot);
+		cea_set_pte(cea_vaddr, per_cpu_ptr_to_phys(ptr), prot);
 }
 
 static void __init percpu_setup_debug_store(unsigned int cpu)