3.16.83-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Gu Jinxiang <gujx@xxxxxxxxxxxxxx> commit 315409b0098fb2651d86553f0436b70502b29bb2 upstream. Reported in https://bugzilla.kernel.org/show_bug.cgi?id=199839, with an image that has an invalid chunk type but does not return an error. Add chunk type check in btrfs_check_chunk_valid, to detect the wrong type combinations. Link: https://bugzilla.kernel.org/show_bug.cgi?id=199839 Reported-by: Xu Wen <wen.xu@xxxxxxxxxx> Reviewed-by: Qu Wenruo <wqu@xxxxxxxx> Signed-off-by: Gu Jinxiang <gujx@xxxxxxxxxxxxxx> Signed-off-by: David Sterba <dsterba@xxxxxxxx> [bwh: Backported to 4.4: Use root->fs_info instead of fs_info] Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> --- fs/btrfs/volumes.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -5815,6 +5815,8 @@ static int btrfs_check_chunk_valid(struc u16 num_stripes; u16 sub_stripes; u64 type; + u64 features; + bool mixed = false; length = btrfs_chunk_length(leaf, chunk); stripe_len = btrfs_chunk_stripe_len(leaf, chunk); @@ -5855,6 +5857,32 @@ static int btrfs_check_chunk_valid(struc btrfs_chunk_type(leaf, chunk)); return -EIO; } + + if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) { + btrfs_err(root->fs_info, "missing chunk type flag: 0x%llx", type); + return -EIO; + } + + if ((type & BTRFS_BLOCK_GROUP_SYSTEM) && + (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) { + btrfs_err(root->fs_info, + "system chunk with data or metadata type: 0x%llx", type); + return -EIO; + } + + features = btrfs_super_incompat_flags(root->fs_info->super_copy); + if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) + mixed = true; + + if (!mixed) { + if ((type & BTRFS_BLOCK_GROUP_METADATA) && + (type & BTRFS_BLOCK_GROUP_DATA)) { + btrfs_err(root->fs_info, + "mixed chunk type in non-mixed mode: 0x%llx", type); + return -EIO; + } + } + if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) || (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) || (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
