diff options
| author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-06-01 00:11:32 +0200 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-06-01 00:13:24 +0200 |
| commit | fa7110a9c4bd0ece4be33998b6f9e7d4f528acc7 (patch) | |
| tree | 42a0d55c1a0f0414baee929bab84eeb48ad01564 | |
| parent | e2786de8c6c82d00b450faecff662d585f932286 (diff) | |
Fix: libsqfs: do not report out of bounds positions from meta reader
When asking the meta data reader for its current position and
we *just* read to the end of a block, report the start of the
next block as the current location.
Otherwise, trying to *seek* to the resulting position immediately
after reporting throws an out-of-bounds error.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
| -rw-r--r-- | lib/sqfs/meta_reader.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/sqfs/meta_reader.c b/lib/sqfs/meta_reader.c index a47c1e8..94da268 100644 --- a/lib/sqfs/meta_reader.c +++ b/lib/sqfs/meta_reader.c @@ -147,8 +147,13 @@ int sqfs_meta_reader_seek(sqfs_meta_reader_t *m, sqfs_u64 block_start, void sqfs_meta_reader_get_position(const sqfs_meta_reader_t *m, sqfs_u64 *block_start, size_t *offset) { - *block_start = m->block_offset; - *offset = m->offset; + if (m->offset == m->data_used) { + *block_start = m->next_block; + *offset = 0; + } else { + *block_start = m->block_offset; + *offset = m->offset; + } } int sqfs_meta_reader_read(sqfs_meta_reader_t *m, void *data, size_t size) |