From mboxrd@z Thu Jan 1 00:00:00 1970
Return-Path: <jblunck@gmail.com>
Received: from mail-wi0-f179.google.com (mail-wi0-f179.google.com
[209.85.212.179]) by dpdk.org (Postfix) with ESMTP id CE45658E4
for <dev@dpdk.org>; Fri, 29 May 2015 12:35:25 +0200 (CEST)
Received: by wizo1 with SMTP id o1so18063009wiz.1
for <dev@dpdk.org>; Fri, 29 May 2015 03:35:25 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
h=sender:from:to:subject:date:message-id;
bh=BTBbDKfMcNtJyDkE+oYJCGnaLicmoq8NGeFczomseZM=;
b=HqmDRAFpHJtHIRSJkvsrWwU5lfuBkSho2+kcahR09Zzub0BSwrCT+WyfR9s3ewtQ8f
DLr6bv/aSzx2fJnjE/ZYNnIoPxL9/H1WfV/BbPN+9gv5qZm4GYYQ0JZlO8xP0eaJw8GO
UvhcYVq+g6hrrt74ZuazDYMcK0qlotp3B3uQ7TmEg1abHV+7gI4Hg3/4/g3BvO+EX9B2
kp7S0Iby27kfbwJk0AC4bQtFdndldm7/NIrRNFGhKreSEaCCsGbfhMqHxPdpLgpuPfj6
qyszaPF9mIpJGaz9FVyhx07InB5HZW8yen61oJU5jFyrQPsG6OYc9gzUlasArTJXeRqg
iHMQ==
X-Received: by 10.180.14.193 with SMTP id r1mr5015645wic.47.1432895725657;
Fri, 29 May 2015 03:35:25 -0700 (PDT)
Received: from linux-04uu.site.eng.vyatta.net
(port-92-196-75-134.dynamic.qsc.de. [92.196.75.134])
by mx.google.com with ESMTPSA id ny7sm2463585wic.11.2015.05.29.03.35.24
for <dev@dpdk.org>
(version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128);
Fri, 29 May 2015 03:35:25 -0700 (PDT)
Sender: Jan Blunck <jblunck@gmail.com>
From: Jan Blunck <jblunck@infradead.org>
To: dev@dpdk.org
Date: Fri, 29 May 2015 12:34:48 +0200
Message-Id: <1432895688-1728-1-git-send-email-jblunck@infradead.org>
X-Mailer: git-send-email 2.1.4
Subject: [dpdk-dev] [PATCH] log: Properly reset log_history_size in
rte_log_dump_history()
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: patches and discussions about DPDK <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
<mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
<mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Fri, 29 May 2015 10:35:26 -0000
In rte_log_dump_history() the log_history list is reinitialized without
resetting the log_history_size. In the next call to rte_log_add_in_history()
the log_history_size > RTE_LOG_HISTORY and the code unconditionally tries
to remove the first entry:
Program received signal SIGSEGV, Segmentation fault.
rte_log_add_in_history (
buf=buf@entry=0x7f02035cd000 "DATAPLANE: 9:dp0s7 link RTM_NEWLINK [dp0s7] <UP,BROADCAST,RUNNING,MULTICAST,LOWER_UP>\nCAST,LOWER_UP>\n", size=size@entry=86)
at /usr/src/packages/BUILD/lib/librte_eal/common/eal_common_log.c:122
Signed-off-by: Jan Blunck <jblunck@infradead.org>
---
lib/librte_eal/common/eal_common_log.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index fe3d7d5..cb4311c 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -119,7 +119,8 @@ rte_log_add_in_history(const char *buf, size_t size)
/* get a buffer for adding in history */
if (log_history_size > RTE_LOG_HISTORY) {
hist_buf = STAILQ_FIRST(&log_history);
- STAILQ_REMOVE_HEAD(&log_history, next);
+ if (hist_buf)
+ STAILQ_REMOVE_HEAD(&log_history, next);
}
else {
if (rte_mempool_mc_get(log_history_mp, &obj) < 0)
@@ -234,6 +235,7 @@ rte_log_dump_history(FILE *out)
rte_spinlock_lock(&log_list_lock);
tmp_log_history = log_history;
STAILQ_INIT(&log_history);
+ log_history_size = 0;
rte_spinlock_unlock(&log_list_lock);
for (i=0; i<RTE_LOG_HISTORY; i++) {
--
2.1.4