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| author | Anand Jain <anand.jain@oracle.com> | 2019-04-02 18:07:38 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-04-04 17:56:12 +0200 |
| commit | 50398fde997f6be8faebdb5f38e9c9c467370f51 (patch) | |
| tree | 993ba120f3debd0ff1503500b183fbeba8c3fc62 /fs/btrfs | |
| parent | f35f06c35560a86e841631f0243b83a984dc11a9 (diff) | |
| download | linux-50398fde997f6be8faebdb5f38e9c9c467370f51.tar.bz2 | |
btrfs: prop: fix zstd compression parameter validation
We let pass zstd compression parameter even if it is not fully valid.
For example:
$ btrfs prop set /btrfs compression zst
$ btrfs prop get /btrfs compression
compression=zst
zlib and lzo are fine.
Fix it by checking the correct prefix length.
Fixes: 5c1aab1dd544 ("btrfs: Add zstd support")
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/props.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c index dc6140013ae8..fd19f3078566 100644 --- a/fs/btrfs/props.c +++ b/fs/btrfs/props.c @@ -396,7 +396,7 @@ static int prop_compression_apply(struct inode *inode, btrfs_set_fs_incompat(fs_info, COMPRESS_LZO); } else if (!strncmp("zlib", value, 4)) { type = BTRFS_COMPRESS_ZLIB; - } else if (!strncmp("zstd", value, len)) { + } else if (!strncmp("zstd", value, 4)) { type = BTRFS_COMPRESS_ZSTD; btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD); } else { |