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Diffstat (limited to 'lib/ext2fs/punch.c')
| -rw-r--r-- | lib/ext2fs/punch.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/ext2fs/punch.c b/lib/ext2fs/punch.c index effa1e2d..e2543e1e 100644 --- a/lib/ext2fs/punch.c +++ b/lib/ext2fs/punch.c @@ -200,6 +200,10 @@ static errcode_t punch_extent_blocks(ext2_filsys fs, ext2_ino_t ino, __u32 cluster_freed; errcode_t retval = 0; + if (free_start < fs->super->s_first_data_block || + (free_start + free_count) >= ext2fs_blocks_count(fs->super)) + return EXT2_ET_BAD_BLOCK_NUM; + /* No bigalloc? Just free each block. */ if (EXT2FS_CLUSTER_RATIO(fs) == 1) { *freed += free_count; |