linux-kernel - [PATCH] f2fs: fix to check compression feature before enabling file compression

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Date:   Thu,  4 Aug 2022 21:41:40 +0800
From:   Chao Yu <chao@...nel.org>
To:     jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org, Chao Yu <chao.yu@...o.com>
Subject: [PATCH] f2fs: fix to check compression feature before enabling file compression

From: Chao Yu <chao.yu@...o.com>

This patch disallow to enable file compression in image which doesn't
support compression feature.

Signed-off-by: Chao Yu <chao.yu@...o.com>
---
 fs/f2fs/file.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 24f5b02c78e7..4a3f4eaa3fc5 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1872,6 +1872,8 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
 			if (!f2fs_disable_compressed_file(inode))
 				return -EINVAL;
 		} else {
+			if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
+				return -EOPNOTSUPP;
 			if (!f2fs_may_compress(inode))
 				return -EINVAL;
 			if (S_ISREG(inode->i_mode) && F2FS_HAS_BLOCKS(inode))
-- 
2.36.1