From: Mikhail <mp39590@gmail.com>
Subject: Re: gotd crash while requesting non-existent commit id
To: gameoftrees@openbsd.org
Date: Sun, 4 Dec 2022 15:15:58 +0300

On Fri, Nov 04, 2022 at 01:47:43PM +0100, Stefan Sperling wrote:
> On Fri, Nov 04, 2022 at 03:37:12PM +0300, Mikhail wrote:
> > While doing some kind of "manual stress testing" with gotd it crashed
> > for me. Crashes are repeatable.
> 
> Thanks, there was a simple coding error.
> Should be fixed by commit 36c7cfbb2a9b646bfb1658fca4e34bc63a46ec42

Here is a test case for this bug.

Can it be useful?

diff /home/misha/work/got
commit - 24b7de1c04072bf25db2df8acbf93a7ba7bbabfd
path + /home/misha/work/got
blob - cd20ee9bf8631fcd757767edf78df5f410e56161
file + regress/gotd/Makefile
--- regress/gotd/Makefile
+++ regress/gotd/Makefile
@@ -1,7 +1,7 @@
 REGRESS_TARGETS=test_repo_read test_repo_read_group \
 	test_repo_read_denied_user test_repo_read_denied_group \
 	test_repo_read_bad_user test_repo_read_bad_group \
-	test_repo_write test_repo_write_empty
+	test_repo_write test_repo_write_empty repo_req_wrong_commit
 NOOBJ=Yes
 
 .PHONY: ensure_root prepare_test_repo check_test_repo start_gotd
@@ -28,6 +28,7 @@ GOTD_TEST_ENV=GOTD_TEST_ROOT=$(GOTD_TEST_ROOT) \
 	GOTD_TEST_REPO_URL=$(GOTD_TEST_REPO_URL) \
 	GOTD_TEST_REPO=$(GOTD_TEST_REPO) \
 	GOTD_SOCK=$(GOTD_SOCK) \
+	GOTD_STOP_CMD="$(GOTD_STOP_CMD)" \
 	GOTD_DEVUSER=$(GOTD_DEVUSER) \
 	HOME=$(GOTD_TEST_USER_HOME) \
 	PATH=$(GOTD_TEST_USER_HOME)/bin:$(PATH)
@@ -177,4 +178,8 @@ test_repo_write_empty: prepare_test_repo_empty start_g
 	@$(GOTD_STOP_CMD) 2>/dev/null
 	@su -m ${GOTD_USER} -c 'env $(GOTD_TEST_ENV) sh ./check_test_repo.sh'
 	
+repo_req_wrong_commit: prepare_test_repo_empty start_gotd_ro
+	@-$(GOTD_TRAP); su ${GOTD_TEST_USER} -c \
+		'env $(GOTD_TEST_ENV) sh ./repo_req_wrong_commit.sh'
+
 .include <bsd.regress.mk>
blob - /dev/null
file + regress/gotd/repo_req_wrong_commit.sh (mode 644)
--- /dev/null
+++ regress/gotd/repo_req_wrong_commit.sh
@@ -0,0 +1,47 @@
+#!/bin/sh
+#
+# Copyright (c) 2022 Mikhail Pchelin <misha@freebsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+. ../cmdline/common.sh
+. ./common.sh
+
+test_wrong_commit() {
+	local testroot=`test_init wrong_commit`
+
+	echo "0054want aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa multi_ack \
+side-band-64k ofs-delta" | ssh ${GOTD_DEVUSER}@127.0.0.1 \
+		git-upload-pack '/test-repo' > $testroot/stdout
+
+	echo -n "0041ERR object aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \
+not found" > $testroot/stdout.expected
+
+	cmp -s $testroot/stdout $testroot/stdout.expected 112 0
+	ret=$?
+	if [ $ret -ne 0 ]; then
+		echo "comparison doesn't match" >&2
+		test_done "$testroot" "1"
+		return 1
+	fi
+
+	# Before 36c7cfbb2a gotd was crashing after invalid commit in "want"
+	# line, here we check that we can successfully stop working gotd.
+	$GOTD_STOP_CMD
+	ret=$?
+
+	test_done "$testroot" "$ret"
+}
+
+test_parseargs "$@"
+run_test test_wrong_commit