f2fs: compress: fix to avoid memory leak on cc->cpages

Memory allocated for storing compressed pages' poitner should be
released after f2fs_write_compressed_pages(), otherwise it will
cause memory leak issue.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index 3a847bc..a20c9f3 100644 (file)
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1385,6 +1385,8 @@ int f2fs_write_multi_pages(struct compress_ctx *cc,
                err = f2fs_write_compressed_pages(cc, submitted,
                                                        wbc, io_type);
                cops->destroy_compress_ctx(cc);
+               kfree(cc->cpages);
+               cc->cpages = NULL;
                if (!err)
                        return 0;
                f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN);