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-rw-r--r--mm/vmalloc.c26
1 files changed, 22 insertions, 4 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 228a4a5312f2..ef8599d394fd 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -4278,14 +4278,32 @@ void pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
#ifdef CONFIG_PRINTK
bool vmalloc_dump_obj(void *object)
{
- struct vm_struct *vm;
void *objp = (void *)PAGE_ALIGN((unsigned long)object);
+ const void *caller;
+ struct vm_struct *vm;
+ struct vmap_area *va;
+ unsigned long addr;
+ unsigned int nr_pages;
- vm = find_vm_area(objp);
- if (!vm)
+ if (!spin_trylock(&vmap_area_lock))
+ return false;
+ va = __find_vmap_area((unsigned long)objp, &vmap_area_root);
+ if (!va) {
+ spin_unlock(&vmap_area_lock);
return false;
+ }
+
+ vm = va->vm;
+ if (!vm) {
+ spin_unlock(&vmap_area_lock);
+ return false;
+ }
+ addr = (unsigned long)vm->addr;
+ caller = vm->caller;
+ nr_pages = vm->nr_pages;
+ spin_unlock(&vmap_area_lock);
pr_cont(" %u-page vmalloc region starting at %#lx allocated at %pS\n",
- vm->nr_pages, (unsigned long)vm->addr, vm->caller);
+ nr_pages, addr, caller);
return true;
}
#endif