In below error path, tpages[i] could be NULL, fix to check it before
releasing it.
- f2fs_read_multi_pages
- f2fs_alloc_dic
- f2fs_free_dic
Fixes: 61fbae2b2b12 ("f2fs: fix to avoid NULL pointer dereference")
Signed-off-by: Chao Yu <yuch...@huawei.com>
---
fs/f2fs/compress.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 1d692108dbbb..8d025fe6d60c 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1339,6 +1339,8 @@ void f2fs_free_dic(struct decompress_io_ctx *dic)
for (i = 0; i < dic->cluster_size; i++) {
if (dic->rpages[i])
continue;
+ if (!dic->tpages[i])
+ continue;
unlock_page(dic->tpages[i]);
put_page(dic->tpages[i]);
}
--
2.18.0.rc1
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