linux-kernel - Re: [PATCH -next] block: fix uaf for flush rq while iterating tags

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] [day] [month] [year] [list]

Message-Id: <173197993988.55577.13579029777446587026.b4-ty@kernel.dk>
Date: Mon, 18 Nov 2024 18:32:19 -0700
From: Jens Axboe <axboe@...nel.dk>
To: ming.lei@...hat.com, Yu Kuai <yukuai1@...weicloud.com>
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
 yukuai3@...wei.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH -next] block: fix uaf for flush rq while iterating tags


On Mon, 04 Nov 2024 19:00:05 +0800, Yu Kuai wrote:
> blk_mq_clear_flush_rq_mapping() is not called during scsi probe, by
> checking blk_queue_init_done(). However, QUEUE_FLAG_INIT_DONE is cleared
> in del_gendisk by commit aec89dc5d421 ("block: keep q_usage_counter in
> atomic mode after del_gendisk"), hence for disk like scsi, following
> blk_mq_destroy_queue() will not clear flush rq from tags->rqs[] as well,
> cause following uaf that is found by our syzkaller for v6.6:
> 
> [...]

Applied, thanks!

[1/1] block: fix uaf for flush rq while iterating tags
      commit: 3802f73bd80766d70f319658f334754164075bc3

Best regards,
-- 
Jens Axboe