commit 1b796c3fa88f0d3101f3dd979d9f8b511fd93086
from: Stefan Sperling <stsp@stsp.name>
date: Sat Sep 11 08:06:47 2021 UTC

fix a null-pointer deref in 'got fetch -d'; reported by Omar Polo

commit - 678d8c1fe20f1eab5a3568135b24f00c9d22c33c
commit + 1b796c3fa88f0d3101f3dd979d9f8b511fd93086
blob - 5f3984d14029304bc35fa0a2ae1caeff8de74a69
blob + b1b444cf1fc04c7930365cd15df8871bd7a5ee3d
--- got/got.c
+++ got/got.c
@@ -2020,8 +2020,11 @@ delete_missing_refs(struct got_pathlist_head *their_re
 
 	TAILQ_FOREACH(re, &my_refs, entry) {
 		const char *refname = got_ref_get_name(re->ref);
+		const char *their_refname;
 
-		if (!remote->mirror_references) {
+		if (remote->mirror_references) {
+			their_refname = refname;
+		} else {
 			if (strncmp(refname, remote_namespace,
 			    strlen(remote_namespace)) == 0) {
 				if (strcmp(refname + strlen(remote_namespace),
@@ -2034,17 +2037,19 @@ delete_missing_refs(struct got_pathlist_head *their_re
 				}
 			} else if (strncmp(refname, "refs/tags/", 10) != 0)
 				continue;
-		}
 
+			their_refname = local_refname;
+		}
+	
 		TAILQ_FOREACH(pe, their_refs, entry) {
-			if (strcmp(local_refname, pe->path) == 0)
+			if (strcmp(their_refname, pe->path) == 0)
 				break;
 		}
 		if (pe != NULL)
 			continue;
 
 		TAILQ_FOREACH(pe, their_symrefs, entry) {
-			if (strcmp(local_refname, pe->path) == 0)
+			if (strcmp(their_refname, pe->path) == 0)
 				break;
 		}
 		if (pe != NULL)
blob - e0587383f411d35c4be341e74b562fba63fbfbf8
blob + 5b536e8cfc092fb0ac4d203d6360716d2f94ff5b
--- regress/cmdline/fetch.sh
+++ regress/cmdline/fetch.sh
@@ -508,7 +508,103 @@ test_fetch_delete_branch() {
 	test_done "$testroot" "$ret"
 
 }
+
+test_fetch_delete_branch_mirror() {
+	local testroot=`test_init fetch_delete_branch_mirror`
+	local testurl=ssh://127.0.0.1/$testroot
+	local commit_id=`git_show_head $testroot/repo`
+
+	got branch -r $testroot/repo -c $commit_id foo
+	got ref -r $testroot/repo -c $commit_id refs/hoo/boo/zoo
+	got tag -r $testroot/repo -c $commit_id -m tag "1.0" >/dev/null
+	local tag_id=`got ref -r $testroot/repo -l \
+		| grep "^refs/tags/$tag" | tr -d ' ' | cut -d: -f2`
+
+	got clone -a -m -q $testurl/repo $testroot/repo-clone
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		echo "got clone command failed unexpectedly" >&2
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	got ref -l -r $testroot/repo-clone > $testroot/stdout
+
+	echo "HEAD: refs/heads/master" > $testroot/stdout.expected
+	echo "refs/heads/foo: $commit_id" >> $testroot/stdout.expected
+	echo "refs/heads/master: $commit_id" >> $testroot/stdout.expected
+	# refs/hoo/boo/zoo is missing because it is outside of refs/heads
+	echo "refs/tags/1.0: $tag_id" >> $testroot/stdout.expected
 
+	cmp -s $testroot/stdout $testroot/stdout.expected
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	got branch -r $testroot/repo -d foo >/dev/null
+
+	got fetch -q -r $testroot/repo-clone
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		echo "got fetch command failed unexpectedly" >&2
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	got ref -l -r $testroot/repo-clone > $testroot/stdout
+
+	echo "HEAD: refs/heads/master" > $testroot/stdout.expected
+	echo "refs/heads/foo: $commit_id" >> $testroot/stdout.expected
+	echo "refs/heads/master: $commit_id" >> $testroot/stdout.expected
+	# refs/hoo/boo/zoo is missing because it is outside of refs/heads
+	echo "refs/tags/1.0: $tag_id" >> $testroot/stdout.expected
+
+	cmp -s $testroot/stdout $testroot/stdout.expected
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	got fetch -d -q -r $testroot/repo-clone > $testroot/stdout
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		echo "got fetch command failed unexpectedly" >&2
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	echo -n > $testroot/stdout.expected
+
+	cmp -s $testroot/stdout $testroot/stdout.expected
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+		test_done "$testroot" "$ret"
+		return 1
+	fi
+
+	got ref -l -r $testroot/repo-clone > $testroot/stdout
+
+	echo "HEAD: refs/heads/master" > $testroot/stdout.expected
+	# refs/heads/foo is now deleted
+	echo "refs/heads/master: $commit_id" >> $testroot/stdout.expected
+	# refs/hoo/boo/zoo is missing because it is outside of refs/heads
+	echo "refs/tags/1.0: $tag_id" >> $testroot/stdout.expected
+
+	cmp -s $testroot/stdout $testroot/stdout.expected
+	ret="$?"
+	if [ "$ret" != "0" ]; then
+		diff -u $testroot/stdout.expected $testroot/stdout
+	fi
+	test_done "$testroot" "$ret"
+
+}
+
 test_fetch_update_tag() {
 	local testroot=`test_init fetch_update_tag`
 	local testurl=ssh://127.0.0.1/$testroot
@@ -1191,6 +1287,7 @@ run_test test_fetch_branch
 run_test test_fetch_all
 run_test test_fetch_empty_packfile
 run_test test_fetch_delete_branch
+run_test test_fetch_delete_branch_mirror
 run_test test_fetch_update_tag
 run_test test_fetch_reference
 run_test test_fetch_replace_symref