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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Chao Yu <yuchao0@huawei.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 014/149] f2fs: fix to recover inode->i_flags of inode block during POR
Date:   Mon,  4 Nov 2019 22:43:27 +0100
Message-Id: <20191104212133.874700194@linuxfoundation.org>
In-Reply-To: <20191104212126.090054740@linuxfoundation.org>
References: <20191104212126.090054740@linuxfoundation.org>
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From: Chao Yu <yuchao0@huawei.com>

[ Upstream commit 0c093b590efb5c1ccdc835868dc2ae94bd2e14dc ]

Testcase to reproduce this bug:
1. mkfs.f2fs /dev/sdd
2. mount -t f2fs /dev/sdd /mnt/f2fs
3. touch /mnt/f2fs/file
4. sync
5. chattr +a /mnt/f2fs/file
6. xfs_io -a /mnt/f2fs/file -c "fsync"
7. godown /mnt/f2fs
8. umount /mnt/f2fs
9. mount -t f2fs /dev/sdd /mnt/f2fs
10. xfs_io /mnt/f2fs/file

There is no error when opening this file w/o O_APPEND, but actually,
we expect the correct result should be:

/mnt/f2fs/file: Operation not permitted

The root cause is, in recover_inode(), we recover inode->i_flags more
than F2FS_I(inode)->i_flags, so fix it.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/f2fs/recovery.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index 281ba46b5b359..2c3be4c3c626f 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -226,6 +226,7 @@ static void recover_inode(struct inode *inode, struct page *page)
 
 	F2FS_I(inode)->i_advise = raw->i_advise;
 	F2FS_I(inode)->i_flags = le32_to_cpu(raw->i_flags);
+	f2fs_set_inode_flags(inode);
 	F2FS_I(inode)->i_gc_failures[GC_FAILURE_PIN] =
 				le16_to_cpu(raw->i_gc_failures);
 
-- 
2.20.1