KVM: x86/PVM: Use 'current->active_mm' to obtain the host pgd

When building the PVM module as builtin, the 'current->mm' can be NULL since the current thread may be the swapper task, which is a kernel thread. Therefore, use 'current->active_mm' instead, as it should not be NULL. Signed-off-by: Hou Wenlong <[email protected]>
virt-pvm · Apr 25, 2024 · 312df69 · 312df69
1 parent 858242d
commit 312df69
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/arch/x86/kvm/pvm/host_mmu.c b/arch/x86/kvm/pvm/host_mmu.c
@@ -101,9  101,9 @@ int __init host_mmu_init(void)
 		return -ENOMEM;
 
 	if (!boot_cpu_has(X86_FEATURE_PTI))
-		host_pgd = (void *)current->mm->pgd;
 		host_pgd = (void *)current->active_mm->pgd;
 	else
-		host_pgd = (void *)kernel_to_user_pgdp(current->mm->pgd);
 		host_pgd = (void *)kernel_to_user_pgdp(current->active_mm->pgd);
 
 	host_mmu_root_pgd = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);