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The inode mode loaded from corrupted disk can be invalid. Do like what
commit 0a9e740513 ("isofs: Verify inode mode when loading from disk")
does.
Reported-by: syzbot <syzbot+895c23f6917da440ed0d@syzkaller.appspotmail.com>
Closes: https://syzkaller.appspot.com/bug?extid=895c23f6917da440ed0d
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Link: https://lore.kernel.org/ec982681-84b8-4624-94fa-8af15b77cbd2@I-love.SAKURA.ne.jp
Signed-off-by: Christian Brauner <brauner@kernel.org>