Pull request 2129: 6644-fix-nil-deref

Updates #6644.

Co-authored-by: Eugene Burkov <E.Burkov@AdGuard.COM>

Squashed commit of the following:

commit a79f4a35f811ab85302d266839f55143afc6fff8
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Jan 17 19:53:58 2024 +0300

    all: upd chlog

commit 9106dfb65dcfbbe40a0c97964279e8c35d4c8c00
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Jan 17 19:43:34 2024 +0300

    home: fix nil deref

CHANGELOG.md

@@ -71,6 +71,7 @@ In this release, the schema version has changed from 27 to 28.
 
 ### Fixed
 
+- Panic on using `--no-etc-hosts` flag ([#6644]).
 - Schedule display in the client settings after creating or updating.
 - Zero value in `querylog.size_memory` disables logging ([#6570]).
 - Non-anonymized IP addresses on the dashboard ([#6584]).
@@ -95,6 +96,7 @@ In this release, the schema version has changed from 27 to 28.
 [#6570]: https://github.com/AdguardTeam/AdGuardHome/issues/6570
 [#6574]: https://github.com/AdguardTeam/AdGuardHome/issues/6574
 [#6584]: https://github.com/AdguardTeam/AdGuardHome/issues/6584
+[#6644]: https://github.com/AdguardTeam/AdGuardHome/issues/6644
 
 [wiki-config]: https://github.com/AdguardTeam/AdGuardHome/wiki/Configuration
 

internal/home/home.go

@@ -360,6 +360,11 @@ func setupDNSFilteringConf(conf *filtering.Config) (err error) {
 	)
 
 	conf.EtcHosts = Context.etcHosts
+	// TODO(s.chzhen):  Use empty interface.
+	if Context.etcHosts == nil {
+		conf.EtcHosts = nil
+	}
+
 	conf.ConfigModified = onConfigModified
 	conf.HTTPRegister = httpRegister
 	conf.DataDir = Context.getDataDir()