For details see:
https://downloads.isc.org/isc/bind9/9.16.49/doc/arm/html/notes.html#notes-for-bind-9-16-49
"Bug Fixes
A regression in cache-cleaning code enabled memory use to grow
significantly more quickly than before, until the configured
max-cache-size limit was reached. This has been fixed. [GL #4596]
Using rndc flush inadvertently caused cache cleaning to become
less effective. This could ultimately lead to the configured
max-cache-size limit being exceeded and has now been fixed. [GL #4621]
The logic for cleaning up expired cached DNS records was tweaked to be
more aggressive. This change helps with enforcing max-cache-ttl and
max-ncache-ttl in a timely manner. [GL #4591]
It was possible to trigger a use-after-free assertion when the overmem
cache cleaning was initiated. This has been fixed. [GL #4595]"
Signed-off-by: Matthias Fischer <matthias.fischer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
6f1b0fecd2