fs/file_table: fix adding missing kmemleak_not_leak()

Commit b42bc9a ("Fix regression due to "fs: move binfmt_misc sysctl
to its own file") fixed a regression, however it failed to add a
kmemleak_not_leak().

Fixes: b42bc9a ("Fix regression due to "fs: move binfmt_misc sysctl to its own file")
Reported-by: Tong Zhang <ztong0001@gmail.com>
Cc: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/file_table.c

@@ -27,6 +27,7 @@
 #include <linux/task_work.h>
 #include <linux/ima.h>
 #include <linux/swap.h>
+#include <linux/kmemleak.h>
 
 #include <linux/atomic.h>
 
@@ -119,8 +120,11 @@ static struct ctl_table fs_stat_sysctls[] = {
 static int __init init_fs_stat_sysctls(void)
 {
 	register_sysctl_init("fs", fs_stat_sysctls);
-	if (IS_ENABLED(CONFIG_BINFMT_MISC))
-		register_sysctl_mount_point("fs/binfmt_misc");
+	if (IS_ENABLED(CONFIG_BINFMT_MISC)) {
+		struct ctl_table_header *hdr;
+		hdr = register_sysctl_mount_point("fs/binfmt_misc");
+		kmemleak_not_leak(hdr);
+	}
 	return 0;
 }
 fs_initcall(init_fs_stat_sysctls);