[PATCH v3 RESEND] staging: erofs: fix an error handling in erofs_readdir()

[Chao Yu]

On 2019-8-18 11:21, Gao Xiang wrote:
> From: Gao Xiang <gaoxiang25 at huawei.com>
> 
> Richard observed a forever loop of erofs_read_raw_page() [1]
> which can be generated by forcely setting ->u.i_blkaddr
> to 0xdeadbeef (as my understanding block layer can
> handle access beyond end of device correctly).
> 
> After digging into that, it seems the problem is highly
> related with directories and then I found the root cause
> is an improper error handling in erofs_readdir().
> 
> Let's fix it now.
> 
> [1] https://lore.kernel.org/r/1163995781.68824.1566084358245.JavaMail.zimbra@nod.at/
> 
> Reported-by: Richard Weinberger <richard at nod.at>
> Fixes: 3aa8ec716e52 ("staging: erofs: add directory operations")
> Cc: <stable at vger.kernel.org> # 4.19+
> Signed-off-by: Gao Xiang <gaoxiang25 at huawei.com>

Reviewed-by: Chao Yu <yuchao0 at huawei.com>

Thanks,