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From: "triegel at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug nptl/25847] pthread_cond_signal failed to wake up
 pthread_cond_wait due to a bug in undoing stealing
Date: Thu, 07 Jan 2021 20:43:31 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25847

--- Comment #22 from Torvald Riegel <triegel at redhat dot com> ---
(In reply to Manoj Gupta from comment #19)
> We are also hitting this bug in Chrome OS builders
> (https://bugs.chromium.org/p/chromium/issues/detail?id=3D1101625)

Have you confirmed that there is a thread that's stuck in a condvar wait, a=
nd
with a faulty state as described in this BZ?  Looking through this issue, I
only saw a futex waiter being mentioned (which could be any other
synchronization primitive that uses futexes, and could be due to buggy use =
of
that primitive by the program).

> @Malte, is your upstream patch accepted?

AFAIA, no.  (And I'm not an active member of the glibc community anymore, s=
o I
don't get to contribute to acceptance decisions.)

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