linux-kernel - Re: [PATCH v2] vmxnet3: avoid assumption about invalid dma_pa in vmxnet3_set

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Date:   Sat, 15 Oct 2016 17:48:25 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     khoroshilov@...ras.ru
Cc:     skhare@...are.com, pv-drivers@...are.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ldv-project@...uxtesting.org
Subject: Re: [PATCH v2] vmxnet3: avoid assumption about invalid dma_pa in
 vmxnet3_set_mc()

From: Alexey Khoroshilov <khoroshilov@...ras.ru>
Date: Sat, 15 Oct 2016 00:01:20 +0300

> vmxnet3_set_mc() checks new_table_pa returned by dma_map_single()
> with dma_mapping_error(), but even there it assumes zero is invalid pa
> (it assumes dma_mapping_error(...,0) returns true if new_table is NULL).
> 
> The patch adds an explicit variable to track status of new_table_pa.
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> v2: use "bool" and "true"/"false" for boolean variables.
> Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>

Applied.