linux-kernel - Re: [PATCH] erofs: avoid unnecessary loops in z_erofs_pcluster

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 10 Jul 2023 12:40:11 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     Chunhai Guo <guochunhai@...o.com>, xiang@...nel.org,
        chao@...nel.org
Cc:     huyue2@...lpad.com, jefflexu@...ux.alibaba.com,
        linux-erofs@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] erofs: avoid unnecessary loops in
 z_erofs_pcluster_readmore() when read page beyond EOF



On 2023/7/10 12:25, Chunhai Guo wrote:
> z_erofs_pcluster_readmore() may take a long time to loop when the page
> offset is large enough, which is unnecessary should be prevented.
> For example, when the following case is encountered, it will loop 4691368
> times, taking about 27 seconds.
>      - offset = 19217289215
>      - inode_size = 1442672
> 
> Signed-off-by: Chunhai Guo <guochunhai@...o.com>

It looks good to me,

Fixes: 386292919c25 ("erofs: introduce readmore decompression strategy")
Reviewed-by: Gao Xiang <hsiangkao@...ux.alibaba.com>

Thanks,
Gao Xiang