From: Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Mike Marciniszyn
<mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Dennis Dalessandro
<dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Hal Rosenstock
<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Ira Weiny <ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Jubin John <jubin.john-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Jianxin Xiong
<jianxin.xiong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] IB/hfi1: use size_t for passing array length
Date: Sun, 19 Feb 2017 08:56:35 -0500 [thread overview]
Message-ID: <1487512595.86943.112.camel@redhat.com> (raw)
In-Reply-To: <20170214212358.2730288-1-arnd-r2nGTMty4D4@public.gmane.org>
[-- Attachment #1: Type: text/plain, Size: 1099 bytes --]
On Tue, 2017-02-14 at 22:23 +0100, Arnd Bergmann wrote:
> gcc-7 produces a mysterious warning about the size argument being
> potentially out
> of range:
>
> drivers/infiniband/hw/hfi1/verbs.c: In function 'init_cntr_names':
> drivers/infiniband/hw/hfi1/verbs.c:1644:2: error: 'memcpy': specified
> size between 18446744071562067968 and 18446744073709551615 exceeds
> maximum object size 9223372036854775807 [-Werror=stringop-overflow=]
>
> This seems to refer to a the case where an 64-bit size_t gets
> truncated
> into a negative 'int' and subsequently turned into a high 64-bit
> number
> again.
>
> The fix is clearly to use size_t here, which matches the type that
> gets
> used for this value elsewhere.
>
> Fixes: b7481944b06e ("IB/hfi1: Show statistics counters under IB
> stats interface")
> Signed-off-by: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Thanks, applied.
--
Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
GPG KeyID: B826A3330E572FDD
Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Doug Ledford <dledford@redhat.com>
To: Arnd Bergmann <arnd@arndb.de>,
Mike Marciniszyn <mike.marciniszyn@intel.com>,
Dennis Dalessandro <dennis.dalessandro@intel.com>
Cc: Sean Hefty <sean.hefty@intel.com>,
Hal Rosenstock <hal.rosenstock@gmail.com>,
Ira Weiny <ira.weiny@intel.com>,
Jubin John <jubin.john@intel.com>,
Jianxin Xiong <jianxin.xiong@intel.com>,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] IB/hfi1: use size_t for passing array length
Date: Sun, 19 Feb 2017 08:56:35 -0500 [thread overview]
Message-ID: <1487512595.86943.112.camel@redhat.com> (raw)
In-Reply-To: <20170214212358.2730288-1-arnd@arndb.de>
[-- Attachment #1: Type: text/plain, Size: 1050 bytes --]
On Tue, 2017-02-14 at 22:23 +0100, Arnd Bergmann wrote:
> gcc-7 produces a mysterious warning about the size argument being
> potentially out
> of range:
>
> drivers/infiniband/hw/hfi1/verbs.c: In function 'init_cntr_names':
> drivers/infiniband/hw/hfi1/verbs.c:1644:2: error: 'memcpy': specified
> size between 18446744071562067968 and 18446744073709551615 exceeds
> maximum object size 9223372036854775807 [-Werror=stringop-overflow=]
>
> This seems to refer to a the case where an 64-bit size_t gets
> truncated
> into a negative 'int' and subsequently turned into a high 64-bit
> number
> again.
>
> The fix is clearly to use size_t here, which matches the type that
> gets
> used for this value elsewhere.
>
> Fixes: b7481944b06e ("IB/hfi1: Show statistics counters under IB
> stats interface")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Thanks, applied.
--
Doug Ledford <dledford@redhat.com>
GPG KeyID: B826A3330E572FDD
Key fingerprint = AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FDD
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2017-02-19 13:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-14 21:23 [PATCH] IB/hfi1: use size_t for passing array length Arnd Bergmann
2017-02-14 21:23 ` Arnd Bergmann
2017-02-15 5:24 ` Leon Romanovsky
[not found] ` <20170214212358.2730288-1-arnd-r2nGTMty4D4@public.gmane.org>
2017-02-19 13:56 ` Doug Ledford [this message]
2017-02-19 13:56 ` Doug Ledford
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1487512595.86943.112.camel@redhat.com \
--to=dledford-h+wxahxf7alqt0dzr+alfa@public.gmane.org \
--cc=arnd-r2nGTMty4D4@public.gmane.org \
--cc=dennis.dalessandro-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
--cc=ira.weiny-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=jianxin.xiong-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=jubin.john-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=mike.marciniszyn-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.