linux-kernel - Re: [v11 2/2] misc: pci_endpoint_test: Fix overflow of bar

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] [day] [month] [year] [list]

Message-ID: <Z4jTeNjl7ddfcQl1@ryzen>
Date: Thu, 16 Jan 2025 10:38:00 +0100
From: Niklas Cassel <cassel@...nel.org>
To: Krzysztof Wilczyński <kw@...ux.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Hans Zhang <18255117159@....com>, kishon@...nel.org, arnd@...db.de,
	gregkh@...uxfoundation.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, rockswang7@...il.com
Subject: Re: [v11 2/2] misc: pci_endpoint_test: Fix overflow of bar_size

On Thu, Jan 16, 2025 at 10:36:18AM +0100, Niklas Cassel wrote:
> Hello Krzysztof,
> 
> On Thu, Jan 16, 2025 at 11:03:00AM +0900, Krzysztof Wilczyński wrote:
> > Hello,
> > 
> > > I intended to stay silent, but considering that Mani gave additional
> > > feedback:
> > 
> > I am glad you didn't as feedback is always appreciated. :)
> > 
> > > - The Suggested-by tag should be in patch 1/2, not 2/2 :)
> > >   (Patch 2/2 was 100% you.)
> > 
> > I moved the Suggested-by tag around the correct patch.
> > 
> > Thank you!
> > 
> > 	Krzysztof
> 
> Since you have already applied this series, with my comment fixed up,
> could your perhaps add the following (or similar) to the commit message
> in patch 2/2:
> 
> 
> "
> By changing the type to resource_size_t, which is a typedef to phys_addr_t,
> which can be 64-bit in certain configurations (e.g. X86_PAE selects
> PHYS_ADDR_T_64BIT), even when the compiler is 32-bit. Thus, we also need to
> change the division to do_div(), to properly perform a 64-bit division when
> the compiler is 32-bit.
> "

s/do_div()/div_u64()/


Kind regards,
Niklas