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authorBob Copeland <me@bobcopeland.com>2008-08-14 18:43:59 -0400
committerBob Copeland <me@bobcopeland.com>2010-07-10 14:37:39 -0400
commit9442e54f433eff9b6fbd0836611df4c1919df370 (patch)
tree5740987b7a7fcb1511263435fbbf48cf15ff0814 /fs/omfs
parentf068272cb2f134a194b93e94a8e0672bfce48cd8 (diff)
downloadlinux-linaro-stable-9442e54f433eff9b6fbd0836611df4c1919df370.tar.gz
omfs: refuse to mount if bitmap pointer is obviously wrong
If the free space bitmap pointer is corrupted such that it lies outside of the number of blocks in the filesystem, print a message and fail the mount so the user can fix it offline. Signed-off-by: Bob Copeland <me@bobcopeland.com>
Diffstat (limited to 'fs/omfs')
-rw-r--r--fs/omfs/inode.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index bd4bf753a63b..0af5d0af9f32 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -509,6 +509,15 @@ static int omfs_fill_super(struct super_block *sb, void *data, int silent)
goto out_brelse_bh2;
}
+ if (sbi->s_bitmap_ino != ~0ULL &&
+ sbi->s_bitmap_ino > sbi->s_num_blocks) {
+ printk(KERN_ERR "omfs: free space bitmap location is corrupt "
+ "(%llx, total blocks %llx)\n",
+ (unsigned long long) sbi->s_bitmap_ino,
+ (unsigned long long) sbi->s_num_blocks);
+ goto out_brelse_bh2;
+ }
+
ret = omfs_get_imap(sb);
if (ret)
goto out_brelse_bh2;