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| author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2019-09-24 17:46:54 +0200 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2019-09-24 17:46:54 +0200 |
| commit | 8f60ea029a81e1419c4b6f95a1fdf4b166c4efd2 (patch) | |
| tree | 6b6eb840b3adf3a596da05749b91552c4c9d39ab /lib | |
| parent | 2354f7b5cfc289fdec95eeecb8d441c20513712b (diff) | |
Fix memory and pointer leaks in data reader error paths
Make sure that the block cache pointers are reset to NULL after
freeing them, the get_block function does not update them on failure.
Also, make sure all error paths in the get_block function actually
clean up the allocated memory.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sqfs/data_reader.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/lib/sqfs/data_reader.c b/lib/sqfs/data_reader.c index 2603cfe..19b416b 100644 --- a/lib/sqfs/data_reader.c +++ b/lib/sqfs/data_reader.c @@ -57,8 +57,10 @@ static int get_block(sqfs_data_reader_t *data, uint64_t off, uint32_t size, on_disk_size = SQFS_ON_DISK_BLOCK_SIZE(size); - if (on_disk_size > unpacked_size) + if (on_disk_size > unpacked_size) { + free(blk); return SQFS_ERROR_OVERFLOW; + } if (SQFS_IS_BLOCK_COMPRESSED(size)) { err = data->file->read_at(data->file, off, @@ -95,6 +97,7 @@ static int precache_data_block(sqfs_data_reader_t *data, uint64_t location, return 0; free(data->data_block); + data->data_block = NULL; ret = get_block(data, location, size, data->block_size, &data->data_block); @@ -119,6 +122,7 @@ static int precache_fragment_block(sqfs_data_reader_t *data, size_t idx) return SQFS_ERROR_OUT_OF_BOUNDS; free(data->frag_block); + data->frag_block = NULL; ret = get_block(data, data->frag[idx].start_offset, data->frag[idx].size, data->block_size, |