diff options
Diffstat (limited to 'fs/udf/balloc.c')
| -rw-r--r-- | fs/udf/balloc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c index ec85aeaed54a..02f03fadb75b 100644 --- a/fs/udf/balloc.c +++ b/fs/udf/balloc.c @@ -325,6 +325,17 @@ got_block: newblock = bit + (block_group << (sb->s_blocksize_bits + 3)) - (sizeof(struct spaceBitmapDesc) << 3); + if (newblock >= sbi->s_partmaps[partition].s_partition_len) { + /* + * Ran off the end of the bitmap, and bits following are + * non-compliant (not all zero) + */ + udf_err(sb, "bitmap for partition %d corrupted (block %u marked" + " as free, partition length is %u)\n", partition, + newblock, sbi->s_partmaps[partition].s_partition_len); + goto error_return; + } + if (!udf_clear_bit(bit, bh->b_data)) { udf_debug("bit already cleared for block %d\n", bit); goto repeat; |