Now that the log message has been printed set the result code to
DNS_R_FORMERR. We don't do this via dns_result_torcode() as we
don't want upstream errors to produce FORMERR if that processing
end with DNS_R_BADTSIG.
(cherry picked from commit 20488d6ad3)
Running system tests with root privileges is potentially dangerous.
Only allow it when explicitly requested (by building with
--enable-developer).
(cherry picked from commit 3ef106f69d)
server might be created, but not yet fully initialized, when fatal
function is called. Check both server and task before attaching
exclusive task.
(cherry picked from commit c5e7152cf0)
it was possible for the count_newzones() function to try to
unlock view->new_zone_lock on return before locking it, which
caused a crash on shutdown.
(cherry picked from commit ed37c63e2b)
When "rndc reconfig" is run, named first configures a fresh set of views
and then tears down the old views. Consider what happens for a single
view with LMDB enabled; "envA" is the pointer to the LMDB environment
used by the original/old version of the view, "envB" is the pointer to
the same LMDB environment used by the new version of that view:
1. mdb_env_open(envA) is called when the view is first created.
2. "rndc reconfig" is called.
3. mdb_env_open(envB) is called for the new instance of the view.
4. mdb_env_close(envA) is called for the old instance of the view.
This seems to have worked so far. However, an upstream change [1] in
LMDB which will be part of its 0.9.26 release prevents the above
sequence of calls from working as intended because the locktable mutexes
will now get destroyed by the mdb_env_close() call in step 4 above,
causing any subsequent mdb_txn_begin() calls to fail (because all of the
above steps are happening within a single named process).
Preventing the above scenario from happening would require either
redesigning the way we use LMDB in BIND, which is not something we can
easily backport, or redesigning the way BIND carries out its
reconfiguration process, which would be an even more severe change.
To work around the problem, set MDB_NOLOCK when calling mdb_env_open()
to stop LMDB from controlling concurrent access to the database and do
the necessary locking in named instead. Reuse the view->new_zone_lock
mutex for this purpose to prevent the need for modifying struct dns_view
(which would necessitate library API version bumps). Drop use of
MDB_NOTLS as it is made redundant by MDB_NOLOCK: MDB_NOTLS only affects
where LMDB reader locktable slots are stored while MDB_NOLOCK prevents
the reader locktable from being used altogether.
[1] https://git.openldap.org/openldap/openldap/-/commit/2fd44e325195ae81664eb5dc36e7d265927c5ebc
(cherry picked from commit 53120279b5)
Make yaml.load_all() use yaml.SafeLoader to address a warning currently
emitted when bin/tests/system/dnstap/ydump.py is run:
ydump.py:28: YAMLLoadWarning: calling yaml.load_all() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
for l in yaml.load_all(f.stdout):
(cherry picked from commit 62f631f798)
Add a note why we don't have a test case for the issue.
It is tricky to write a good test case for this if our tools are
not allowed to create signatures for unsupported algorithms.
(cherry picked from commit c6345fffe9)
enough buffer space. Also change named_os_uname() prototype so
that it is now returning (const char *) rather than (char *). If
uname() is not supported on a UNIX build prepopulate unamebuf[]
with "unknown architecture".
(cherry picked from commit 4bc3de070f)
It might be possible some pending task would run when kserver is already
cleaned up. Postpone gsstsig structures cleanup after task and timer
managers are destroyed. No pending threads are possible after it.
Make action in maybeshutdown only if doshutdown was not already called.
Might be called from getinput event.
(cherry picked from commit 2685e69be8)
In [RT #43367], the BIND 9 changed the strictness of address / prefix
length checks:
Check prefixes in acls to make sure the address and
prefix lengths are consistent. Warn only in
BIND 9.11 and earlier.
Unfortunately, a regression slipped in and the check was made an error
also in the BIND 9.11. This commit fixes the regression, but turning
the error into a warning.
Add a system test that counts how many address fetches are made
for different numbers of NS records and checks that the number
are successfully limited.
as the update triggers by the rndc command to clear the signing records
may not have completed by the time the subsequent rndc command to test
that the records have been removed is commenced. Loop several times to
prevent false negative.
(cherry picked from commit 353018c0e5)
There a race between when the delta is logged and when the
server returns signed record. Retry the queries if the
lookups fail to meet expectations.
(cherry picked from commit 46c4e5d96f)
the CHECK() macro resets result, so an error code from an earlier
view could be erased if the last view loaded had no errors.
(cherry picked from commit 7e73660206)
Test zones with various escape sequences and filesystem seperator
characters.
* escaped double quote (\")
* escaped escape (\\)
* escaped decimal byte value (\032)
* slash seperator (/)
(cherry picked from commit 5ab9b5b1e6)
named_os_openfile was being called with switch_user set to true
unconditionally leading to log messages about being unable to
switch user identity from named when regenerating the key.
(cherry picked from commit 071bc29962)
When running on Linux and system capabilities are available, named will
drop the extra capabilities before loading the configuration. This led
to spurious warnings from `seteuid()` because named already dropped
CAP_SETUID and CAP_GETUID capabilities.
The fix removes setting the effective uid/gid when capabilities are
available, and adds a check that we are running under the user we were
requested to run.
(cherry picked from commit 6c82e2af92)
All our MSVS Project files share the same intermediate directory. We
know that this doesn't cause any problems, so we can just disable the
detection in the project files.
Example of the warning:
warning MSB8028: The intermediate directory (.\Release\) contains files shared from another project (dnssectool.vcxproj). This can lead to incorrect clean and rebuild behavior.
(cherry picked from commit b6c2012d93)
Our vcxproj files set the WarningLevel to Level3, which is too verbose
for a code that needs to be portable. That basically leads to ignoring
all the errors that MSVC produces. This commits downgrades the
WarningLevel to Level1 and enables treating warnings as errors for
Release builds. For the Debug builds the WarningLevel got upgraded to
Level4, and treating warnings as errors is explicitly disabled.
We should eventually make the code clean of all MSVC warnings, but it's
a long way to go for Level4, so it's more reasonable to start at Level1.
For reference[1], these are the warning levels as described by MSVC
documentation:
* /W0 suppresses all warnings. It's equivalent to /w.
* /W1 displays level 1 (severe) warnings. /W1 is the default setting
in the command-line compiler.
* /W2 displays level 1 and level 2 (significant) warnings.
* /W3 displays level 1, level 2, and level 3 (production quality)
warnings. /W3 is the default setting in the IDE.
* /W4 displays level 1, level 2, and level 3 warnings, and all level 4
(informational) warnings that aren't off by default. We recommend
that you use this option to provide lint-like warnings. For a new
project, it may be best to use /W4 in all compilations. This option
helps ensure the fewest possible hard-to-find code defects.
* /Wall displays all warnings displayed by /W4 and all other warnings
that /W4 doesn't include — for example, warnings that are off by
default.
* /WX treats all compiler warnings as errors. For a new project, it
may be best to use /WX in all compilations; resolving all warnings
ensures the fewest possible hard-to-find code defects.
1. https://docs.microsoft.com/en-us/cpp/build/reference/compiler-option-warning-level?view=vs-2019
(cherry picked from commit 789d253e3d)
This test asserts that option "deny-answer-aliases" works correctly
when forwarding requests.
As a matter of example, the behavior expected for a forwarder BIND
instance, having an option such as deny-answer-aliases { "domain"; }
is that when forwarding a request for *.anything-but-domain, it is
expected that it will return SERVFAIL if any answer received has a CNAME
for "*.domain".
These are mostly false positives, the clang-analyzer FAQ[1] specifies
why and how to fix it:
> The reason the analyzer often thinks that a pointer can be null is
> because the preceding code checked compared it against null. So if you
> are absolutely sure that it cannot be null, remove the preceding check
> and, preferably, add an assertion as well.
The 2 warnings reported are:
byname_test.c:308:34: warning: Access to field 'fwdtable' results in a dereference of a null pointer (loaded from variable 'view')
RUNTIME_CHECK(dns_fwdtable_add(view->fwdtable, dns_rootname,
^~~~~~~~~~~~~~
/builds/isc-projects/bind9/lib/isc/include/isc/util.h:318:52: note: expanded from macro 'RUNTIME_CHECK'
^~~~
/builds/isc-projects/bind9/lib/isc/include/isc/error.h:50:21: note: expanded from macro 'ISC_ERROR_RUNTIMECHECK'
((void)(ISC_LIKELY(cond) || \
^~~~
/builds/isc-projects/bind9/lib/isc/include/isc/likely.h:23:43: note: expanded from macro 'ISC_LIKELY'
^
1 warning generated.
--
./rndc.c:255:6: warning: Dereference of null pointer (loaded from variable 'host')
if (*host == '/') {
^~~~~
1 warning generated.
References:
1. https://clang-analyzer.llvm.org/faq.html#null_pointer
(cherry picked from commit ddd0d356e5)
Mark AndrewsandMichał Kępień
Michal Nowak
Diego FronzaandEvan Hunt
Petr MenšíkandMark Andrews
Matthijs MekkingandMark Andrews
Stephen MorrisandMichał Kępień
Tinderbox UserandMichał Kępień