From 724f4de0b7c699fe04cae9dbfdf1c45156d63591 Mon Sep 17 00:00:00 2001
From: shenchenkai <shenchenkai@huawei.com>
Date: Fri, 22 Oct 2021 16:59:53 +0800
Subject: [PATCH] fixed c121d0e from
 https://gitee.com/shenchenkai/kernel_liteos_a/pulls/670 Description:[fix]
 clean hilog/hievent ring buffer after memory verification failed

Change-Id: I9310fe807ec95721be78deb60ed9728ef9b56e48
Signed-off-by: shenchenkai <shenchenkai@huawei.com>
---
 kernel/common/los_hilog.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/common/los_hilog.c b/kernel/common/los_hilog.c
index f4bc5f9d..6d9fbc6f 100644
--- a/kernel/common/los_hilog.c
+++ b/kernel/common/los_hilog.c
@@ -201,6 +201,13 @@ static ssize_t HiLogRead(struct file *filep, char *buffer, size_t bufLen)
     HiLogBufferDec(header.len);
     retval = header.len + sizeof(header);
 out:
+    if (retval == -ENOMEM) {
+        // clean ring buffer
+        g_hiLogDev.writeOffset = 0;
+        g_hiLogDev.headOffset = 0;
+        g_hiLogDev.size = 0;
+        g_hiLogDev.count = 0;
+    }
     (VOID)LOS_MuxRelease(&g_hiLogDev.mtx);
     return retval;
 }
-- 
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