linux-kernel - Re: [PATCH v2] ipc/sem: do not sleep with a spin lock held

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Message-ID: <5818b7e5-5d21-9f80-3571-f0d34b4f5c23@colorfullife.com>
Date:   Tue, 4 Jan 2022 21:18:55 +0100
From:   Manfred Spraul <manfred@...orfullife.com>
To:     Shakeel Butt <shakeelb@...gle.com>, cgel.zte@...il.com
Cc:     stable <stable@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Arnd Bergmann <arnd@...db.de>, chi.minghao@....com.cn,
        Davidlohr Bueso <dbueso@...e.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Randy Dunlap <rdunlap@...radead.org>, unixbhaskar@...il.com,
        Vasily Averin <vvs@...tuozzo.com>, zealci@....com.cn
Subject: Re: [PATCH v2] ipc/sem: do not sleep with a spin lock held

On 1/4/22 19:20, Shakeel Butt wrote:
> On Wed, Dec 22, 2021 at 7:12 PM <cgel.zte@...il.com> wrote:
>> From: Minghao Chi <chi.minghao@....com.cn>
>>
>> We can't call kvfree() with a spin lock held, so defer it.
>> Fixes: fc37a3b8b438 ("[PATCH] ipc sem: use kvmalloc for sem_undo
>> allocation")
>>
>> Reported-by: Zeal Robot <zealci@....com.cn>
>> Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
> Reviewed-by: Shakeel Butt <shakeelb@...gle.com>

Reviewed-by: Manfred Spraul <manfred@...orfullife.com>

--

     Manfred