[PATCH 5.7 132/204] f2fs: compress: fix to avoid memory leak on cc->cpages

Greg Kroah-Hartman
2020-08-20T12:58:20Z

From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit 02772fbfcba8597eef9d5c5f7f94087132d0c1d4 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/f2fs/compress.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index a5b2e72174bb1..527d50edcb956 100644
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1250,6 +1250,8 @@ 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);
--
2.25.1