netdev - Re: [PATCH 0/2] swiotlb: Cleanup and consistency fix

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20190611184834.GD12859@char.us.oracle.com>
Date:   Tue, 11 Jun 2019 14:48:34 -0400
From:   Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        "open list:DMA MAPPING HELPERS" <iommu@...ts.linux-foundation.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>
Subject: Re: [PATCH 0/2] swiotlb: Cleanup and consistency fix

On Tue, Jun 11, 2019 at 10:58:23AM -0700, Florian Fainelli wrote:
> Hi Christoph,

I pulled the patches in my tree. 
> 
> Still with my contrived memory layout where there is no physical memory
> the kernel can use below 4GB, it was possible to fail swiotlb_init(),
> but still not hit swiotlb_map_single() since all peripherals have a
> DMA_BIT_MASK() that is within the remaining addressable physical memory.
> 
> The second path could be backported to stable, but for the same reasons
> as the one we had just discussed before, this requires a very contrived
> test case that is not necessarily realistic or would warrant a stable
> backport IMHO.
> 
> Thanks!
> 
> Florian Fainelli (2):
>   swiotlb: Group identical cleanup in swiotlb_cleanup()
>   swiotlb: Return consistent SWIOTLB segments/nr_tbl
> 
>  kernel/dma/swiotlb.c | 26 ++++++++++++++------------
>  1 file changed, 14 insertions(+), 12 deletions(-)
> 
> -- 
> 2.17.1
>