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From 3bcdd03212c6f0a849a4fbdf3cc7cb99fb7327cb Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekletar@users.noreply.github.com>
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Date: Fri, 25 Aug 2017 15:36:10 +0200
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Subject: [PATCH] service: attempt to execute next main command only for
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oneshot services (#6619)
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This commit fixes crash described in
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https://github.com/systemd/systemd/issues/6533
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Multiple ExecStart lines are allowed only for oneshot services
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anyway so it doesn't make sense to call service_run_next_main() with
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services of type other than SERVICE_ONESHOT.
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Referring back to reproducer from the issue, previously we didn't observe
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this problem because s->main_command was reset after daemon-reload hence
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we never reached the assert statement in service_run_next_main().
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Fixes #6533
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(cherry picked from commit b58aeb70dbd1cab5908b003ef5187da1fc241839)
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Related: #1404657, #1471230
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---
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src/core/service.c | 1 +
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test/test-exec-deserialization.py | 31 +++++++++++++++++++++++++++++++
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2 files changed, 32 insertions(+)
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diff --git a/src/core/service.c b/src/core/service.c
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index 9ad3a0eb0..ceed1cc2e 100644
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--- a/src/core/service.c
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+++ b/src/core/service.c
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@@ -2612,6 +2612,7 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
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if (s->main_command &&
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s->main_command->command_next &&
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+ s->type == SERVICE_ONESHOT &&
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f == SERVICE_SUCCESS) {
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/* There is another command to *
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diff --git a/test/test-exec-deserialization.py b/test/test-exec-deserialization.py
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index 859778a7a..61623da99 100755
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--- a/test/test-exec-deserialization.py
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+++ b/test/test-exec-deserialization.py
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@@ -178,6 +178,37 @@ class ExecutionResumeTest(unittest.TestCase):
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self.assertTrue(not os.path.exists(self.output_file))
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+ def test_issue_6533(self):
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+ unit = "test-issue-6533.service"
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+ unitfile_path = "/run/systemd/system/{}".format(unit)
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+
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+ content = '''
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+ [Service]
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+ ExecStart=/bin/sleep 5
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+ '''
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+
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+ with open(unitfile_path, 'w') as f:
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+ f.write(content)
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+
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+ self.reload()
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+
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+ subprocess.check_call(['systemctl', '--job-mode=replace', '--no-block', 'start', unit])
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+ time.sleep(2)
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+
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+ content = '''
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+ [Service]
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+ ExecStart=/bin/sleep 5
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+ ExecStart=/bin/true
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+ '''
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+
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+ with open(unitfile_path, 'w') as f:
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+ f.write(content)
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+
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+ self.reload()
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+ time.sleep(5)
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+
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+ self.assertTrue(subprocess.call("journalctl -b _PID=1 | grep -q 'Freezing execution'", shell=True) != 0)
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+
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def tearDown(self):
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for f in [self.output_file, self.unitfile_path]:
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try:
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