diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-23 14:17:47 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:32:39 +0200 |
| commit | ff1961b0822b78fc893d9504e441a1c5d411cd5b (patch) | |
| tree | e8c6dde999b60648fbdafe69cfd0ce54e8c8e222 | |
| parent | 489d5c9a12ce266f776e8beab99607b97116106e (diff) | |
f2fs: return early when trying to read null nid
If get_node_page() gets zero nid, we can return early without getting a wrong
page. For example, get_dnode_of_data() can try to do that.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/node.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index 976890301..b18fa830c 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1059,6 +1059,10 @@ struct page *get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid) { struct page *page; int err; + + if (!nid) + return ERR_PTR(-ENOENT); + f2fs_bug_on(sbi, check_nid_range(sbi, nid)); repeat: page = grab_cache_page(NODE_MAPPING(sbi), nid); if (!page) |