Message-ID: <5818b7e5-5d21-9f80-3571-f0d34b4f5c23@colorfullife.com>
Date:   Tue, 4 Jan 2022 21:18:55 +0100
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Subject: Re: [PATCH v2] ipc/sem: do not sleep with a spin lock held
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To:     Shakeel Butt <shakeelb@google.com>, cgel.zte@gmail.com
Cc:     stable <stable@vger.kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Arnd Bergmann <arnd@arndb.de>, chi.minghao@zte.com.cn,
        Davidlohr Bueso <dbueso@suse.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Randy Dunlap <rdunlap@infradead.org>, unixbhaskar@gmail.com,
        Vasily Averin <vvs@virtuozzo.com>, zealci@zte.com.cn
References: <63840bf3-2199-3240-bdfa-abb55518b5f9@colorfullife.com>
 <20211223031207.556189-1-chi.minghao@zte.com.cn>
 <CALvZod7pTO6D5Lx62-eVWORSj4Q=Px2iu=qUgqA_9AZwQOKsUg@mail.gmail.com>
From:   Manfred Spraul <manfred@colorfullife.com>
In-Reply-To: <CALvZod7pTO6D5Lx62-eVWORSj4Q=Px2iu=qUgqA_9AZwQOKsUg@mail.gmail.com>
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On 1/4/22 19:20, Shakeel Butt wrote:
> On Wed, Dec 22, 2021 at 7:12 PM <cgel.zte@gmail.com> wrote:
>> From: Minghao Chi <chi.minghao@zte.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@zte.com.cn>
>> Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
> Reviewed-by: Shakeel Butt <shakeelb@google.com>

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

--

     Manfred