f2fs: add sanity check on ei.len in __update_extent_tree_range()
Add a sanity check in __update_extent_tree_range() to detect any
zero-sized extent update.
Signed-off-by: wangzijie <wangzijie1@honor.com>
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index ba0a07b..33e09c4 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -670,6 +670,15 @@ static void __update_extent_tree_range(struct inode *inode,
if (!et)
return;
+ if (unlikely(len == 0)) {
+ f2fs_err_ratelimited(sbi, "%s: extent len is zero, type: %d, "
+ "extent [%u, %u, %u], age [%llu, %llu]",
+ __func__, type, tei->fofs, tei->blk, tei->len,
+ tei->age, tei->last_blocks);
+ f2fs_bug_on(sbi, 1);
+ return;
+ }
+
if (type == EX_READ)
trace_f2fs_update_read_extent_tree_range(inode, fofs, len,
tei->blk, 0);
