Below patch adds stricter checks in ext2fs_open() so that we catch bad
block sizes earlier than later.
============================================================================
Signed-off-by: "Manish Katiyar" <mkatiyar@xxxxxxxxx>
---
lib/ext2fs/openfs.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index fc54afe..670cc7c 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -233,7 +233,9 @@ errcode_t ext2fs_open2(const char *name, const
char *io_options,
}
fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
- if (fs->blocksize == 0) {
+ if ((fs->blocksize < EXT2_MIN_BLOCK_SIZE) ||
+ (fs->blocksize > EXT2_MAX_BLOCK_SIZE) ||
+ (fs->blocksize % EXT2_MIN_BLOCK_SIZE != 0)) {
retval = EXT2_ET_CORRUPT_SUPERBLOCK;
goto cleanup;
}
--
1.5.4.3
============================================================================
--
Thanks & Regards,
********************************************
Manish Katiyar ( http://mkatiyar.googlepages.com )
3rd Floor, Fair Winds Block
EGL Software Park
Off Intermediate Ring Road
Bangalore 560071, India
***********************************************
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