This is what I ended up checking into my tree:
From: Manish Katiyar <mkatiyar@xxxxxxxxx>
Date: Fri, 11 Jul 2008 17:45:07 -0400
Subject: [PATCH] libext2fs: Add stricter/earlier tests for blocksize in ext2fs_open()
Signed-off-by: "Manish Katiyar" <mkatiyar@xxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
lib/ext2fs/openfs.c | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index fc54afe..525693e 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -232,11 +232,12 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
}
}
- fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
- if (fs->blocksize == 0) {
+ if ((fs->super->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
+ EXT2_MAX_BLOCK_LOG_SIZE) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
+ fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
--
1.5.6.1.205.ge2c7.dirty
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