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From: Will Deacon <will@kernel.org>
To: Andre Przywara <andre.przywara@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>
Cc: catalin.marinas@arm.com, Will Deacon <will@kernel.org>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
Subject: Re: [PATCH kvmtool v2] net: uip: Fix GCC 10 warning about checksum calculation
Date: Tue, 19 May 2020 17:46:59 +0100	[thread overview]
Message-ID: <158990624263.2259.695515833438045756.b4-ty@kernel.org> (raw)
In-Reply-To: <20200518125649.216416-1-andre.przywara@arm.com>

On Mon, 18 May 2020 13:56:49 +0100, Andre Przywara wrote:
> GCC 10.1 generates a warning in net/ip/csum.c about exceeding a buffer
> limit in a memcpy operation:
> ------------------
> In function 'memcpy',
>     inlined from 'uip_csum_udp' at net/uip/csum.c:58:3:
> /usr/include/aarch64-linux-gnu/bits/string_fortified.h:34:10: error: writing 1 byte into a region of size 0 [-Werror=stringop-overflow=]
>    34 |   return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
>       |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from net/uip/csum.c:1:
> net/uip/csum.c: In function 'uip_csum_udp':
> include/kvm/uip.h:132:6: note: at offset 0 to object 'sport' with size 2 declared here
>   132 |  u16 sport;
> ------------------
> [...]

Applied to kvmtool (master), thanks!

[1/1] net: uip: Fix GCC 10 warning about checksum calculation



      reply	other threads:[~2020-05-19 16:47 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-18 12:56 [PATCH kvmtool v2] net: uip: Fix GCC 10 warning about checksum calculation Andre Przywara
2020-05-19 16:46 ` Will Deacon [this message]

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