From: Christoph Hellwig <hch@lst.de>
To: Nicolin Chen <nicoleotsuka@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>,
Christoph Hellwig <hch@lst.de>,
Linux Next Mailing List <linux-next@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: linux-next: boot failure after merge of the dma-mapping tree
Date: Thu, 20 Aug 2020 17:49:41 +0200 [thread overview]
Message-ID: <20200820154941.GA11349@lst.de> (raw)
In-Reply-To: <20200820083617.GA6124@Asurada>
On Thu, Aug 20, 2020 at 01:36:17AM -0700, Nicolin Chen wrote:
> Took a quick look -- the boundary_size is seemingly passed from
> https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/powerpc/kernel/iommu.c#n240
>
> boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1,
> 1 << tbl->it_page_shift);
>
> Looks like an overflow happens due to (ULONG_MAX + 1). Should
> we fix here instead (or also)?
Yes, please. I'll drop the patch again for now, but once we've
got this sorted out I'll readd it.
next prev parent reply other threads:[~2020-08-20 15:49 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-20 5:51 linux-next: boot failure after merge of the dma-mapping tree Stephen Rothwell
2020-08-20 8:36 ` Nicolin Chen
2020-08-20 15:49 ` Christoph Hellwig [this message]
2020-08-20 20:31 ` Nicolin Chen
-- strict thread matches above, loose matches on Subject: below --
2025-07-09 13:39 Stephen Rothwell
2025-07-09 17:41 ` Leon Romanovsky
2025-07-09 23:46 ` Stephen Rothwell
2025-07-09 18:16 ` Leon Romanovsky
2025-07-10 0:10 ` Stephen Rothwell
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