linux-ext4 - e2fsprogs coverity patch <cid-51.diff>

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <200702100211.l1A2BgSO007505@igsi.llnl.gov>
Date:	Fri, 9 Feb 2007 18:11:42 -0800
From:	"Brian D. Behlendorf" <behlendorf1@...l.gov>
To:	tytso@....edu
Cc:	linux-ext4@...r.kernel.org, adilger@...sterfs.com,
	behlendorf1@...l.gov, wartens2@...l.gov
Subject: e2fsprogs coverity patch <cid-51.diff>

Lawrence Livermore National Labs recently ran the source code
analysis tool Coverity over the e2fsprogs-1.39 source to see 
if it would identify any significant bugs.  The analysis
turned up 38 mostly minor issues which are enumerated here
with patches.  We went through and resolved these issues
but would love to see these mostly minor changes reviewed
and commited upstream.

Thanks,
Brian Behlendorf <behlendorf1@...l.gov>, and
Herb Wartens <wartens2@...l.gov>

-----------------------------------------------------------------------------
Coverity ID: 51: Use After Free

ext2fs_get_pathname() can return without having allocated memory for pathname.
Probably also should be more careful about using printf with NULL value as well
(even though GNU probably handles this well).

Index: e2fsprogs+chaos/debugfs/debugfs.c
===================================================================
--- e2fsprogs+chaos.orig/debugfs/debugfs.c
+++ e2fsprogs+chaos/debugfs/debugfs.c
@@ -950,15 +950,23 @@ void do_print_working_directory(int argc
 		com_err(argv[0], retval,
 			"while trying to get pathname of cwd");
 	}
-	printf("[pwd]   INODE: %6u  PATH: %s\n", cwd, pathname);
-	free(pathname);
+	printf("[pwd]   INODE: %6u  PATH: %s\n",
+	       cwd, pathname ? pathname : "NULL");
+        if(pathname) {
+		free(pathname);
+		pathname = NULL;
+        }
 	retval = ext2fs_get_pathname(current_fs, root, 0, &pathname);
 	if (retval) {
 		com_err(argv[0], retval,
 			"while trying to get pathname of root");
 	}
-	printf("[root]  INODE: %6u  PATH: %s\n", root, pathname);
-	free(pathname);
+	printf("[root]  INODE: %6u  PATH: %s\n",
+	       root, pathname ? pathname : "NULL");
+	if(pathname) {
+		free(pathname);
+		pathname = NULL;
+	}
 	return;
 }
 
-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html