From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 23 Aug 2021 16:55:31 +0000 (+0100)
Subject: libfstools: handle open() return value properly in F2FS check
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=50e6b20878cea96b7c4bc924c686ebee153874d5;p=project%2Ffstools.git

libfstools: handle open() return value properly in F2FS check

Coverity CID: 1490101 Argument cannot be negative

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---

diff --git a/libfstools/common.c b/libfstools/common.c
index f2d415d..c484776 100644
--- a/libfstools/common.c
+++ b/libfstools/common.c
@@ -90,8 +90,12 @@ static bool use_f2fs(struct volume *v, uint64_t offset, const char *bdev)
 	int fd;
 
 	fd = open(bdev, O_RDONLY);
+	if (fd < 0)
+		return false;
+
 	if (ioctl(fd, BLKGETSIZE64, &size) == 0)
 		ret = size - offset > F2FS_MINSIZE;
+
 	close(fd);
 
 	return ret;