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From:   Namjae Jeon <linkinjeon@kernel.org>
Date:   Fri, 30 Dec 2022 10:33:29 +0900
Message-ID: <CAKYAXd9QLm29mR_FMhEriozHRczkx3A=9CmVWC1KOPGJDwhitQ@mail.gmail.com>
Subject: Re: [PATCH v1] exfat: fix unexpected EOF while reading dir
To:     "Yuezhang.Mo@sony.com" <Yuezhang.Mo@sony.com>
Cc:     "sj1557.seo@samsung.com" <sj1557.seo@samsung.com>,
        "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "Andy.Wu@sony.com" <Andy.Wu@sony.com>,
        "Wataru.Aoyama@sony.com" <Wataru.Aoyama@sony.com>,
        Wang Yugui <wangyugui@e16-tech.com>
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2022-12-26 16:23 GMT+09:00, Yuezhang.Mo@sony.com <Yuezhang.Mo@sony.com>:
> If the position is not aligned with the dentry size, the return
> value of readdir() will be NULL and errno is 0, which means the
> end of the directory stream is reached.
>
> If the position is aligned with dentry size, but there is no file
> or directory at the position, exfat_readdir() will continue to
> get dentry from the next dentry. So the dentry gotten by readdir()
> may not be at the position.
>
> After this commit, if the position is not aligned with the dentry
> size, round the position up to the dentry size and continue to get
> the dentry.
>
> Fixes: ca06197382bd ("exfat: add directory operations")
>
> Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
> Reviewed-by: Andy Wu <Andy.Wu@sony.com>
> Reviewed-by: Aoyama Wataru <wataru.aoyama@sony.com>
> Reported-by: Wang Yugui <wangyugui@e16-tech.com>
Applied, Thanks for your patch!