Btrfs: fix delalloc accounting leak caused by u32 overflow

[mirror_ubuntu-bionic-kernel.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 1e82516fe2d8f864d7cf1ded828e6f196a8d962c..43a8c42cdf072b21da896f8ddfcddd95b9d06ae7 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2564,7 +2564,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes);
 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
                                                 unsigned num_items)
 {
-       return fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
+       return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
 }
 
 /*
@@ -2574,7 +2574,7 @@ static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info,
 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info,
                                                 unsigned num_items)
 {
-       return fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
+       return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;
 }
 
 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans,