ext4: add mask of ext4 flags to swap
commit abdc644e8cbac2e9b19763680e5a7cf9bab2bee7 upstream. The reason is that while swapping two inode, we swap the flags too. Some flags such as EXT4_JOURNAL_DATA_FL can really confuse the things since we're not resetting the address operations structure. The simplest way to keep things sane is to restrict the flags that can be swapped. Signed-off-by: Nyangerkun <yangerkun@huawei.com> Signed-off-by: NTheodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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