From: Chao Yu <yuchao0@huawei.com>
Date: Mon, 20 Jul 2020 08:52:50 +0000 (+0800)
Subject: f2fs: compress: fix to avoid memory leak on cc->cpages
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=02772fbfcba8597eef9d5c5f7f94087132d0c1d4;p=linux.git

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 3a847bc367482..a20c9f3272af1 100644
--- 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);