etmem scan: fix memleak in vm_idle_read

euleros inclusion
category: feature
feature: etmem
bugzilla: 48246

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free pic before return from vm_idle_read in etmem scan
Signed-off-by: NKemeng Shi <shikemeng@huawei.com>
Reviewed-by: louhongxiang <louhongxiang@huawei.com
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

fs/proc/etmem_scan.c

@@ -892,6 +892,7 @@ static ssize_t vm_idle_read(struct file *file, char *buf,
 	ret = pic->bytes_copied;
 	*ppos = pic->next_hva;
 out_kvm:
+	kfree(pic);
 	return ret;
 
 }