linux-ext4 - [PATCH] quota: fix coredump if projid file dose not exist

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Date:	Tue,  5 Jul 2016 16:00:40 +0900
From:	Wang Shilong <wangshilong1991@...il.com>
To:	jack@...e.cz
Cc:	linux-ext4@...r.kernel.org, sihara@....com, lixi@....com,
	Wang Shilong <wshilong@....com>
Subject: [PATCH] quota: fix coredump if projid file dose not exist

From: Wang Shilong <wshilong@....com>

if '/etc/projid' dose not exist,@project_file will
be NULL pointer, fclose will cause coredump, add
check in endprent().

Signed-off-by: Wang Shilong <wshilong@....com>
---
 quotasys.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/quotasys.c b/quotasys.c
index c78e02c..d04f25a 100644
--- a/quotasys.c
+++ b/quotasys.c
@@ -98,8 +98,10 @@ void setprent(void)
 /* Close /etc/projid file */
 void endprent(void)
 {
-	fclose(project_file);
-	project_file = NULL;
+	if (project_file) {
+		fclose(project_file);
+		project_file = NULL;
+	}
 }
 
 /* Get next entry in /etc/projid */
-- 
2.7.4

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