linux-kernel - Re: [PATCH 2/2] f2fs: Add error handling for negative returns from do_garbage

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: Fri, 22 Dec 2023 17:42:26 +0800
From: Chao Yu <chao@...nel.org>
To: Yongpeng Yang <yangyongpeng1@...o.com>, Jaegeuk Kim <jaegeuk@...nel.org>
Cc: linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] f2fs: Add error handling for negative returns from
 do_garbage_collect

On 2023/12/22 11:29, Yongpeng Yang wrote:
> The function do_garbage_collect can return a value less than 0 due
> to f2fs_cp_error being true or page allocation failure, as a result
> of calling f2fs_get_sum_page. However, f2fs_gc does not account for
> such cases, which could potentially lead to an abnormal total_freed
> and thus cause subsequent code to behave unexpectedly. Given that
> an f2fs_cp_error is irrecoverable, and considering that
> do_garbage_collect already retries page allocation errors through
> its call to f2fs_get_sum_page->f2fs_get_meta_page_retry, any error
> reported by do_garbage_collect should immediately terminate the
> current GC.
> 
> Signed-off-by: Yongpeng Yang <yangyongpeng1@...o.com>

Reviewed-by: Chao Yu <chao@...nel.org>

Thanks,