Your message dated Wed, 26 Feb 2020 23:44:31 +0100
with message-id <8642cc10-4785-48ba-abb3-64373c767...@sury.org>
and subject line Re: Bug#952609: libc6: pthread_rwlock_trywrlock hangs
has caused the Debian Bug report #952609,
regarding libc6: pthread_rwlock_trywrlock hangs
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
952609: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=952609
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Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: libc6
Version: 2.28-10
Severity: important
Tags: upstream patch

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Dear Maintainer,

glibc after 2.26 (included) and before 2.30 hangs in pthread_rwlock_tryrwlock
and pthread_rwlock_tryrdlock, the details and test cases can be found in
https://sourceware.org/bugzilla/show_bug.cgi?id=23844#c14

This especially hits BIND 9.16 when using pthread_rwlock (instead of custom ISC
rwlock).

So, could you please fix this in buster?  For sid, this will get fixed as part
of regular updated to 2.30,

The patch is quite small and the impact of pthread_rwlock_try(rw|rd)lock()
hanging is pretty severe.  Also quite hard to find - we spent couple of days
hunting the bug in BIND 9 and it turned to be problem in glibc.

Thanks,
Ondrej

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  APT policy: (500, 'stable-updates'), (500, 'stable')
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--- End Message ---
--- Begin Message ---
Control: fixed -1 glibc/2.28-8
Control: notfound -1 glibc/2.28-10
Control: found -1 glibc/2.27-1

Thanks Aurelien, so it’s actually only Ubuntu Bionic that’s being affected
by the bug.

Ondrej
--
Ondřej Surý
ond...@sury.org



> On 26 Feb 2020, at 23:29, Aurelien Jarno <aurel...@aurel32.net> wrote:
> 
> On 2020-02-26 17:07, Ondřej Surý wrote:
>> Package: libc6
>> Version: 2.28-10
>> Severity: important
>> Tags: upstream patch
>> 
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA512
>> 
>> Dear Maintainer,
>> 
>> glibc after 2.26 (included) and before 2.30 hangs in pthread_rwlock_tryrwlock
>> and pthread_rwlock_tryrdlock, the details and test cases can be found in
>> https://sourceware.org/bugzilla/show_bug.cgi?id=23844#c14
>> 
>> This especially hits BIND 9.16 when using pthread_rwlock (instead of custom 
>> ISC
>> rwlock).
>> 
>> So, could you please fix this in buster?  For sid, this will get fixed as 
>> part
>> of regular updated to 2.30,
> 
> This patch is already included since glibc 2.28-8 as part of pulling the
> upstream stable branch. So it should already be fixed in buster, bullseye
> and sid.
> 
> At least I confirm that the bug23844.wr.c testcase from the upstream bug
> report sometimes fail with glibc 2.28-7, but never fails with glibc
> 2.28-8.
> 
> Regards,
> Aurelien
> 
> -- 
> Aurelien Jarno                          GPG: 4096R/1DDD8C9B
> aurel...@aurel32.net                 http://www.aurel32.net

--- End Message ---

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