diff --git a/kernel/fork.c b/kernel/fork.c
index 1ec0caea6a7e..db02a301d0c0 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1014,13 +1014,14 @@ static struct task_struct *dup_task_struct(struct task_struct *orig, int node)
 
 __cacheline_aligned_in_smp DEFINE_SPINLOCK(mmlist_lock);
 
-static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;
+static unsigned long coredump_filter = MMF_DUMP_FILTER_DEFAULT;
 
 static int __init coredump_filter_setup(char *s)
 {
-	default_dump_filter =
-		(simple_strtoul(s, NULL, 0) << MMF_DUMP_FILTER_SHIFT) &
-		MMF_DUMP_FILTER_MASK;
+	if (kstrtoul(s, 0, &coredump_filter))
+		return 0;
+	coredump_filter <<= MMF_DUMP_FILTER_SHIFT;
+	coredump_filter &= MMF_DUMP_FILTER_MASK;
 	return 1;
 }
 
@@ -1106,7 +1107,7 @@ static struct mm_struct *mm_init(struct mm_struct *mm, struct task_struct *p,
 		__mm_flags_overwrite_word(mm, mmf_init_legacy_flags(flags));
 		mm->def_flags = current->mm->def_flags & VM_INIT_DEF_MASK;
 	} else {
-		__mm_flags_overwrite_word(mm, default_dump_filter);
+		__mm_flags_overwrite_word(mm, coredump_filter);
 		mm->def_flags = 0;
 	}