linux-ext4 - [PATCH 03/47] dumpe2fs: don't crash when the user provides no block device argument

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Date:	Fri, 07 Nov 2014 13:51:02 -0800
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	tytso@....edu, darrick.wong@...cle.com
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH 03/47] dumpe2fs: don't crash when the user provides no block
 device argument

If the user doesn't provide any arguments, the guard fails to run and
the whole thing segfaults on ext2fs_open2().  Don't do that.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 misc/dumpe2fs.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/misc/dumpe2fs.c b/misc/dumpe2fs.c
index e565f2d..26f2e37 100644
--- a/misc/dumpe2fs.c
+++ b/misc/dumpe2fs.c
@@ -656,7 +656,7 @@ int main (int argc, char ** argv)
 			usage();
 		}
 	}
-	if (argc - 1 > optind) {
+	if (optind != argc - 1) {
 		usage();
 		exit(1);
 	}

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