From cc37f75a9ffbbfcb1c3297534f293c8284e3c5a6 Mon Sep 17 00:00:00 2001
From: Phillip Lougher <phillip@squashfs.org.uk>
Date: Mon, 2 Jan 2012 17:47:14 +0000
Subject: [PATCH] Squashfs: fix mount time sanity check for corrupted
superblock
A Squashfs filesystem containing nothing but an empty directory,
although unusual and ultimately pointless, is still valid.
The directory_table >= next_table sanity check rejects these
filesystems as invalid because the directory_table is empty and
equal to next_table.
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
---
fs/squashfs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 2da1715452ac..4619247d74ed 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -290,7 +290,7 @@ handle_fragments:
check_directory_table:
/* Sanity check directory_table */
- if (msblk->directory_table >= next_table) {
+ if (msblk->directory_table > next_table) {
err = -EINVAL;
goto failed_mount;
}
--
2.34.1