Instead of running all the cryptographic validation in a tight loop,
spread it out into multiple event loop "ticks", but moving every single
validation into own isc_async_run() asynchronous event. Move the
cryptographic operations - both verification and DNSKEY selection - to
the offloaded threads (isc_work_enqueue), this further limits the time
we spend doing expensive operations on the event loops that should be
fast.
Limit the impact of invalid or malicious RRSets that contain crafted
records causing the dns_validator to do many validations per single
fetch by adding a cap on the maximum number of validations and maximum
number of validation failures that can happen before the resolving
fails.
The fix for CVE-2023-4408 introduced a regression in the message
parser, which could cause a crash if an rdata type that can only
occur in the question was found in another section.
Use 'dns__message_putassociatedrdataset()' instead of
'dns__message_puttemprdataset()', because after calling the
'dns_rdatalist_tordataset()' function earlier the 'rdataset'
is associated.
the fix for CVE-2023-4408 introduced a regression in the message
parser, which could cause a crash if duplicate rdatasets were found
in the question section. this commit ensures that rdatasets are
correctly disassociated and freed when this occurs.
The logic contained in dangerfile.py incorrectly warns about missing
release note changes for merge requests preparing release documentation
as such merge requests rename files in the doc/notes/ directory. This
(correctly) causes these files to be passed to dangerfile.py via
danger.git.created_files and danger.git.deleted_files rather than via
danger.git.modified_files, which in turn causes the logic checking the
use of the "Release Notes" label to assume that no release notes are
added, removed, or modified by a given merge request.
Fix by considering all types of file changes (modifications, additions,
and removals - which also covers file renaming) when checking whether a
given merge request modifies release notes. Update the warning messages
accordingly.
However, when trying to find release notes added by a given merge
request, deleted files must not be considered. Tweak the logic looking
for GitLab identifiers in the release notes added by a given merge
request so that it only scans modified and added (or renamed) files.
Instead of issuing a separate isc_async_run() call for every RBTDB node
that triggers tree pruning, maintain a list of nodes from which tree
pruning can be started from and only issue an isc_async_run() call if
pruning has not yet been triggered by another RBTDB node.
In some older BIND 9 branches, the extra queuing overhead eliminated by
this change could be remotely exploited to cause excessive memory use.
Due to architectural shift, this branch is not vulnerable to that issue,
but applying the fix to the latter is nevertheless deemed prudent for
consistency and to make the code future-proof.
If we are in the process of looking for the A records as part of
dns64 processing and the server-stale timeout triggers, redo the
dns64 changes that had been made to the orignal qctx.
The wrong result value was being saved for resumption with
nxdomain-redirect when performing the fetch. This lead to an assert
when checking that RFC 1918 reverse queries where not leaking to
the global internet.
When parsing messages use a hashmap instead of a linear search to reduce
the amount of work done in findname when there's more than one name in
the section.
There are two hashmaps:
1) hashmap for owner names - that's constructed for each section when we
hit the second name in the section and destroyed right after parsing
that section;
2) per-name hashmap - for each name in the section, we construct a new
hashmap for that name if there are more than one rdataset for that
particular name.
1) Restart the process with a write lock if we discover an expired key
while holding the read lock.
2) Move incrementing the key reference inside the lock block of code.
isc/atomic.h and its defined macros should be preferred over
stdatomic.h and explicit atomic operations.
Fix the redundant stdatomic.h header in histo.c found by the introduced
check.
If the DNSKEY, CDNSKEY or CDS RRset had different TTLs then the
filtering of these RRset resulted in dns_diff_apply failing with
"not exact". Identify tuple pairs that are just TTL changes and
allow them through the filter.
If the dnskey-ttl in the dnssec-policy doesn't match the DNSKEY's
ttl then the DNSKEY, CDNSKEY and CDS rrset should be updated by
named to reflect the expressed policy. Check that named does this
by creating a zone with a TTL that does not match the policy's TTL
and check that it is correctly updated.
In Net::DNS 1.42 $ns->main_loop no longer loops. Use current methods
for starting the server, wait for SIGTERM then cleanup child processes
using $ns->stop_server(), then remove the pid file.
