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

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Message-ID: <CALvZod7pTO6D5Lx62-eVWORSj4Q=Px2iu=qUgqA_9AZwQOKsUg@mail.gmail.com>
Date:   Tue, 4 Jan 2022 10:20:51 -0800
From:   Shakeel Butt <shakeelb@...gle.com>
To:     cgel.zte@...il.com
Cc:     Manfred Spraul <manfred@...orfullife.com>,
        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 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>