Bug#967938: libc6: systemd-sysusers SEGV due to glibc bug in fgetgsent
* Jinpu Wang:
> Dear Maintainer:
>
> Sorry, add some missing information below:
>
> After update to Buster, the systemd-sysusers are segfaulting every time.
> After search around, I found following bugreport in glibc
> https://sourceware.org/legacy-ml/libc-alpha/2016-06/msg01015.html
>
> I backported to the fix to 2.28-10, it fixed the problem.
>
> glibc upstream have a different fix for it in 2.32, see
> https://sourceware.org/bugzilla/show_bug.cgi?id=20338
>
> I think it's still easier to backport the fix in msg01015.html to 2.28 version,
> patch attached in the initial report.
The patch from 2016 is incomplete because it does not seek back to the
original file position, so the next call of fgetsgent_r skips over the
entry that could not be fully parsed.
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