erofs-utils: more sanity check for buffer allocation optimization
In case that new buffer allocation optimization logic is
potentially broken.
Link: https://lore.kernel.org/r/20210214153549.2454-2-hsiangkao@aol.com
Reviewed-by: Li Guifu <bluce.lee@aliyun.com>
Signed-off-by: Gao Xiang <hsiangkao@aol.com>
diff --git a/lib/cache.c b/lib/cache.c
index 6ae2b20..340dcdd 100644
--- a/lib/cache.c
+++ b/lib/cache.c
@@ -186,8 +186,14 @@
mapped_list);
/* last mapped block can be expended, don't handle it here */
- if (cur == last_mapped_block)
+ if (list_next_entry(cur, list)->blkaddr == NULL_ADDR) {
+ DBG_BUGON(cur != last_mapped_block);
continue;
+ }
+
+ DBG_BUGON(cur->type != type);
+ DBG_BUGON(cur->blkaddr == NULL_ADDR);
+ DBG_BUGON(used_before != cur->buffers.off % EROFS_BLKSIZ);
ret = __erofs_battach(cur, NULL, size, alignsize,
required_ext + inline_ext, true);
