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authorAnand Jain <anand.jain@oracle.com>2019-04-02 18:07:38 +0800
committerDavid Sterba <dsterba@suse.com>2019-04-04 17:56:12 +0200
commit50398fde997f6be8faebdb5f38e9c9c467370f51 (patch)
tree993ba120f3debd0ff1503500b183fbeba8c3fc62 /fs
parentf35f06c35560a86e841631f0243b83a984dc11a9 (diff)
downloadlinux-stericsson-50398fde997f6be8faebdb5f38e9c9c467370f51.tar.gz
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')
-rw-r--r--fs/btrfs/props.c2
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 {