From: "Doug Smythies" <dsmythies@telus.net>
To: "'Borislav Petkov'" <bp@alien8.de>
Cc: <linux-kernel@vger.kernel.org>, "Doug Smythies" <dsmythies@telus.net>
Subject: RE: As of kernel 4.4-rc1 segmentation fault if msr module not loaded. [REGRESSION][BISECTED]
Date: Fri, 27 Nov 2015 08:12:59 -0800 [thread overview]
Message-ID: <000401d1292e$7c50ce80$74f26b80$@net> (raw)
In-Reply-To: <20151126180934.GB18183@pd.tnic>
On 2015.11.26 10:10 Borislav Petkov wrote:
> On Thu, Nov 26, 2015 at 08:25:43AM -0800, Doug Smythies wrote:
>>
>> In some distros, the msr module is not loaded by default.
>> (I guess not built in by default, would be more correct.)
>> I often forget to load it before using "rdmsr" or "wrmsr".
>> It was never an issue before, but as of Kernel 4.4-rc1
>> it causes a segmentation fault crash. Example:
>>
>> # rdmsr -a 0x19a
>> Segmentation fault (core dumped)
> You can either cherrypick
> http://git.kernel.org/tip/2d5be37d686c4dae8e60d20283d6f44ac2c44f65
Just for completeness:
I confirm that the above commit fixes the issue raised herein.
Thanks.
... Doug
prev parent reply other threads:[~2015-11-27 16:13 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-26 16:25 As of kernel 4.4-rc1 segmentation fault if msr module not loaded. [REGRESSION][BISECTED] Doug Smythies
2015-11-26 18:09 ` Borislav Petkov
2015-11-27 16:12 ` Doug Smythies [this message]
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='000401d1292e$7c50ce80$74f26b80$@net' \
--to=dsmythies@telus.net \
--cc=bp@alien8.de \
--cc=linux-kernel@vger.kernel.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.