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[Bug 1319288] segv in libpcp during discovery error processing

To: pcp@xxxxxxxxxxx
Subject: [Bug 1319288] segv in libpcp during discovery error processing
From: bugzilla@xxxxxxxxxx
Date: Fri, 18 Mar 2016 20:31:31 +0000
Auto-submitted: auto-generated
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <bug-1319288-355098@xxxxxxxxxxxxxxxxxxx>
References: <bug-1319288-355098@xxxxxxxxxxxxxxxxxxx>
https://bugzilla.redhat.com/show_bug.cgi?id=1319288



--- Comment #3 from Dave Brolley <brolley@xxxxxxxxxx> ---
(In reply to Frank Ch. Eigler from comment #2)
> - The actual crash appears to occur during a callq instruction, as it's
> writing the return-pc into the stack.  I don't have a theory as to why that
> should be bad; the stack pointer etc. look ok.  Continuing investigation.

Because the program uses potentially 1024 threads, the size of the stack for
each thread has been limited (PTHREAD_STACK_MIN). Unexpected and
undeterministic behaviour can occur if the stack is too small.

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