btrfs: add checks for sys_chunk_array sizes
Verify that possible minimum and maximum size is set, validity of contents is checked in btrfs_read_sys_array. Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
parent
75d6ad382b
commit
ce7fca5f57
|
@ -3910,6 +3910,25 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info,
|
|||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Obvious sys_chunk_array corruptions, it must hold at least one key
|
||||
* and one chunk
|
||||
*/
|
||||
if (btrfs_super_sys_array_size(sb) > BTRFS_SYSTEM_CHUNK_ARRAY_SIZE) {
|
||||
printk(KERN_ERR "BTRFS: system chunk array too big %u > %u\n",
|
||||
btrfs_super_sys_array_size(sb),
|
||||
BTRFS_SYSTEM_CHUNK_ARRAY_SIZE);
|
||||
ret = -EINVAL;
|
||||
}
|
||||
if (btrfs_super_sys_array_size(sb) < sizeof(struct btrfs_disk_key)
|
||||
+ sizeof(struct btrfs_chunk)) {
|
||||
printk(KERN_ERR "BTRFS: system chunk array too small %u < %lu\n",
|
||||
btrfs_super_sys_array_size(sb),
|
||||
sizeof(struct btrfs_disk_key)
|
||||
+ sizeof(struct btrfs_chunk));
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
/*
|
||||
* The generation is a global counter, we'll trust it more than the others
|
||||
* but it's still possible that it's the one that's wrong.
|
||||
|
|
Loading…
Reference in a new issue