linux-kernel - Re: [alsa-devel] [PATCH] opl3: Fix a possible sleep-in-atomic bug in snd_opl3_find

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: <45ffdd2f-ad74-c6fe-3788-da3f9e4df625@163.com>
Date:   Mon, 9 Oct 2017 15:51:36 +0800
From:   Jia-Ju Bai <baijiaju1990@....com>
To:     Clemens Ladisch <clemens@...isch.de>
Cc:     perex@...ex.cz, tiwai@...e.com, o-takashi@...amocchi.jp,
        elfring@...rs.sourceforge.net, fabf@...net.be,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [alsa-devel] [PATCH] opl3: Fix a possible sleep-in-atomic bug in
 snd_opl3_find_patch

Thanks for your reply :)
Yes, you are right. Sorry for this false positive.


Thanks,
Jia-Ju Bai

On 2017/10/9 14:32, Clemens Ladisch wrote:
> Jia-Ju Bai wrote:
>> The driver may sleep under a spinlock, and the function call path is:
>> snd_opl3_note_on (acquire the spinlock)
>>    snd_opl3_find_patch
>>      kzalloc(GFP_KERNEL) --> may sleep
> This call path is not possible because create_patch is not set.
>
>
> Regards,
> Clemens