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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-23 23:17:47 +0100 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-12-30 19:14:12 +0100 |
| commit | 4aa69d5667914dd0844d98ad84804b79a4845fa3 (patch) | |
| tree | 16b2012fcf7aa4718999d1f38b31d63eb44f01a4 /fs/f2fs | |
| parent | f2fs: introduce prepare_write_begin to clean up (diff) | |
| download | linux-4aa69d5667914dd0844d98ad84804b79a4845fa3.tar.xz linux-4aa69d5667914dd0844d98ad84804b79a4845fa3.zip | |
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>
Diffstat (limited to 'fs/f2fs')
| -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 341de5d2353b..929265d20c32 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) |