From 93f17ac5382be1102151fe1322ce90e85665e161 Mon Sep 17 00:00:00 2001 From: David Oberhollenzer Date: Sun, 22 Aug 2021 13:29:26 +0200 Subject: Fix half done initialization of sqfs_dir_reader_open_dir The sqfs_dir_reader_open_dir function tried to take a short-cut by returning early if the target directory is empty. However, this left some field unchanged from the previous directory. If iterating over a directory and then deciding to enter a sub-directory that happens to be empty, the directory reader will keep the settings for the current directory. After calling sqfs_dir_reader_rewind, the sub-directory will suddenly report the contents of the parent. A similar check is added to the rewind function to not track back on the meta data reader in that case. Signed-off-by: David Oberhollenzer --- lib/sqfs/dir_reader.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'lib') diff --git a/lib/sqfs/dir_reader.c b/lib/sqfs/dir_reader.c index 65962d8..e6467ef 100644 --- a/lib/sqfs/dir_reader.c +++ b/lib/sqfs/dir_reader.c @@ -145,15 +145,15 @@ int sqfs_dir_reader_open_dir(sqfs_dir_reader_t *rd, rd->size = size; rd->entries = 0; - if (rd->size <= sizeof(rd->hdr)) - return 0; - block_start += rd->super->directory_table_start; rd->dir_block_start = block_start; rd->dir_offset = offset; rd->start_size = size; + if (rd->size <= sizeof(rd->hdr)) + return 0; + return sqfs_meta_reader_seek(rd->meta_dir, block_start, offset); } @@ -200,6 +200,9 @@ int sqfs_dir_reader_rewind(sqfs_dir_reader_t *rd) rd->size = rd->start_size; rd->entries = 0; + if (rd->size <= sizeof(rd->hdr)) + return 0; + return sqfs_meta_reader_seek(rd->meta_dir, rd->dir_block_start, rd->dir_offset); } -- cgit v1.2.3