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[Qemu-trivial] [PATCH v7] block/vvfat: assert return value of fopen whic

From: zhanghailiang
Subject: [Qemu-trivial] [PATCH v7] block/vvfat: assert return value of fopen which may fail
Date: Mon, 18 Aug 2014 16:00:31 +0800

From: Li Liu <address@hidden>

fopen() may return NULL which will cause setbuf() segmentfault

Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Li Liu <address@hidden>
 block/vvfat.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/vvfat.c b/block/vvfat.c
index 70176b1..62023e1 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -1084,6 +1084,7 @@ static int vvfat_open(BlockDriverState *bs, QDict 
*options, int flags,
 DLOG(if (stderr == NULL) {
     stderr = fopen("vvfat.log", "a");
+    assert(stderr);
     setbuf(stderr, NULL);

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