linux-ext4 - [PATCH] mke2fs: Make lost+found always have at least two blocks

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]

Date:	Thu, 6 Dec 2007 15:15:46 +0100
From:	Jan Kara <jack@...e.cz>
To:	tytso@....edu
Cc:	linux-ext4@...r.kernel.org
Subject: [PATCH] mke2fs: Make lost+found always have at least two blocks

  Hi,

  attached patch modifies mke2fs to always create lost+found with at least
two directory blocks. I think this could make sence not only for testing
but as a sanity check that 64KB support works for general e2fsprogs if
someone decides to use it...

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
---

From: Andreas Dilger <adilger@....com>

Make sure lost+found has always at least 2 disk blocks. This will provide at
least elementary test that we have not screwed-up support for 64KB blocks since
the second directory block will be empty.

Signed-off-by: Jan Kara <jack@...e.cz>

diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 98a4957..6249cc2 100644
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -534,7 +534,10 @@ static void create_lost_and_found(ext2_f
 	}
 	
 	for (i=1; i < EXT2_NDIR_BLOCKS; i++) {
-		if ((lpf_size += fs->blocksize) >= 16*1024)
+		/* Ensure that lost+found is at least 2 blocks, so we always
+		 * test large empty blocks for big-block filesystems.  */
+		if ((lpf_size += fs->blocksize) >= 16*1024 &&
+		    lpf_size >= 2 * fs->blocksize)
 			break;
 		retval = ext2fs_expand_dir(fs, ino);
 		if (retval) {
-
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