linux-kernel - Re: [PATCH 1/2] hp100: Fix a possible sleep-in-atomic bug in hp100_login_to_vg

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Message-ID: <1513214467.27409.44.camel@perches.com>
Date:   Wed, 13 Dec 2017 17:21:07 -0800
From:   Joe Perches <joe@...ches.com>
To:     Jia-Ju Bai <baijiaju1990@...il.com>, perex@...ex.cz,
        floeff@...hematik.uni-stuttgart.de, acme@...ectiva.com.br
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] hp100: Fix a possible sleep-in-atomic bug in
 hp100_login_to_vg_hub

On Wed, 2017-12-13 at 17:47 +0800, Jia-Ju Bai wrote:
> The driver may sleep under a spinlock.
> The function call path is:
> hp100_set_multicast_list (acquire the spinlock)
>   hp100_login_to_vg_hub
>     schedule_timeout_interruptible --> may sleep
> 
> To fix it, schedule_timeout_interruptible is replaced with udelay.
> 
> This bug is found by my static analysis tool(DSAC) and checked by my code review.

Are there any current working VG/AnyLan network installations?
I rather doubt it.