From 9303cb3468517e129d1d4ce2b0c8d271eda6281b Mon Sep 17 00:00:00 2001
From: Jianglei Nie <niejianglei2021@163.com>
Date: Sun, 9 Jan 2022 22:54:18 +0800
Subject: [PATCH] device_qemu: Fix memory leak in ConfigQueue()
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253行调用calloc函数为base分配了内存空间，但是在261行返回ERR_IF前没有对base进行释放，这将会导致内存泄露。

可以通过在261行函数返回ERR_IF前调用free()对base进行释放来修复这个漏洞。

Signed-off-by: Jianglei Nie <niejianglei2021@163.com>
---
 drivers/virtio/virtnet.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/virtio/virtnet.c b/drivers/virtio/virtnet.c
index 7230fa9..7b6ee62 100644
--- a/drivers/virtio/virtnet.c
+++ b/drivers/virtio/virtnet.c
@@ -258,6 +258,7 @@ static err_t ConfigQueue(struct VirtNetif *nic)
 
     buf = VirtmmioConfigQueue(&nic->dev, (VADDR_T)base, qsz, VIRTQ_NUM_NET);
     if (buf == 0) {
+        free(base);
         return ERR_IF;
     }
 
-- 
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