Re: [BUG] Race in online checksums launcher_exit()

Daniel Gustafsson <daniel@yesql.se>

From: Daniel Gustafsson <daniel@yesql.se>
To: Ayush Tiwari <ayushtiwari.slg01@gmail.com>
Cc: PostgreSQL Hackers <pgsql-hackers@postgresql.org>
Date: 2026-04-19T20:17:08Z
Lists: pgsql-hackers
> On 19 Apr 2026, at 22:09, Ayush Tiwari <ayushtiwari.slg01@gmail.com> wrote:
> 
> Hi hackers,
> 
> While using the pg_enable_data_checksums() feature, I found a likely bug, a race condition in  datachecksum_state.c's launcher_exit().

Thanks for your report.  Tomas and I have worked over the past couple of days
on a fixup series due to a rare race condition which was found after extensive
longrunning testing.  While hacking on that we identified what I believe is the
same bug you found and we have a fix for that, the patchset will be shared very
shortly (we am literally putting the final touches on it as I write this).
I'll compare notes and will if applicable incorporate your patch into it.

--
Daniel Gustafsson