diff options
Diffstat (limited to 'fs/erofs/decompressor.c')
| -rw-r--r-- | fs/erofs/decompressor.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c index 93411e9df9b6..97538ff24a19 100644 --- a/fs/erofs/decompressor.c +++ b/fs/erofs/decompressor.c @@ -29,9 +29,20 @@ struct z_erofs_decompressor { }; int z_erofs_load_lz4_config(struct super_block *sb, - struct erofs_super_block *dsb) + struct erofs_super_block *dsb, + struct z_erofs_lz4_cfgs *lz4, int size) { - u16 distance = le16_to_cpu(dsb->lz4_max_distance); + u16 distance; + + if (lz4) { + if (size < sizeof(struct z_erofs_lz4_cfgs)) { + erofs_err(sb, "invalid lz4 cfgs, size=%u", size); + return -EINVAL; + } + distance = le16_to_cpu(lz4->max_distance); + } else { + distance = le16_to_cpu(dsb->lz4_max_distance); + } EROFS_SB(sb)->lz4.max_distance_pages = distance ? DIV_ROUND_UP(distance, PAGE_SIZE) + 1 : |