ubsan and Dejagnu not having a big enough buffer in some cases

[Jeff Law]

On 07/20/2016 02:21 PM, Segher Boessenkool wrote:
> On Wed, Jul 20, 2016 at 12:48:09PM +0530, Senthil Kumar Selvaraj wrote:
>>> I see this for some of the larger C frontend tests with lots of expected errors/warnings as well.
>
> I also see this for tests with small output, but it happens more
> often for tests with big output.
>
>> Are you guys getting this everytime or is it sporadic?
>
> Not always, but usually.  It seems related to how busy the system is,
> but that could be my imagination.
>
> It usually happens for a bunch of tests at the same time.
>
> Not always is the output just cut short: some random characters
> are inserted sometimes (in the individual log files, the consolidated
> log file does not have those; it looks like pointers).
Hmm, there was a kernel bug a while back which had similar behavior. 
What kernel version are you running?

jeff