linux-kernel - [PATCH 2/2] f2fs: fix to check pinfile flag in f2fs_move_file

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Message-Id: <20240403142420.2042498-2-chao@kernel.org>
Date: Wed,  3 Apr 2024 22:24:20 +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@...nel.org>
Subject: [PATCH 2/2] f2fs: fix to check pinfile flag in f2fs_move_file_range()

ioctl(F2FS_IOC_MOVE_RANGE) can truncate or punch hole on pinned file,
fix to disallow it.

Fixes: 5fed0be8583f ("f2fs: do not allow partial truncation on pinned file")
Signed-off-by: Chao Yu <chao@...nel.org>
---
 fs/f2fs/file.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 83a807e25e31..0d1bcdf61a09 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -2858,7 +2858,8 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
 			goto out;
 	}
 
-	if (f2fs_compressed_file(src) || f2fs_compressed_file(dst)) {
+	if (f2fs_compressed_file(src) || f2fs_compressed_file(dst) ||
+		f2fs_is_pinned_file(src) || f2fs_is_pinned_file(dst)) {
 		ret = -EOPNOTSUPP;
 		goto out_unlock;
 	}
-- 
2.40.1