44 lines
1.6 KiB
Diff
44 lines
1.6 KiB
Diff
From 14d3ca976102d1c013b4b634586a365aadcd94c4 Mon Sep 17 00:00:00 2001
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From: Michal Sekletar <msekleta@redhat.com>
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Date: Mon, 22 May 2023 17:44:30 +0200
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Subject: [PATCH] core/service: when resetting PID also reset known flag
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Re-watching pids on cgroup v1 (needed because of unreliability of cgroup
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empty notifications in containers) is handled bellow at the end of
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service_sigchld_event() and depends on value main_pid_known flag.
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In CentOS Stream 8 container on cgroup v1 the stop action would get stuck
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indefinitely on unit like this,
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$ cat /run/systemd/system/foo.service
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[Service]
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ExecStart=/bin/bash -c 'trap "nohup sleep 1 & exit 0" TERM; sleep infinity'
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ExecStop=/bin/bash -c 'kill -s TERM $MAINPID'
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TimeoutSec=0
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However, upstream works "fine" because in upstream version of systemd we
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actually never wait on processes killed in containers and proceed
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immediately to sending SIGKILL hence re-watching of pids in the cgroup
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is not necessary. But for the sake of correctness we should merge the
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patch also upstream.
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(cherry picked from commit ff32060f2ed37b68dc26256b05e2e69013b0ecfe)
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Resolves: #2210237
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---
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src/core/service.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/core/service.c b/src/core/service.c
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index 1e14cdc6ca..e5127a4ccf 100644
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--- a/src/core/service.c
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+++ b/src/core/service.c
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@@ -3507,6 +3507,7 @@ static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
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return;
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s->main_pid = 0;
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+ s->main_pid_known = false;
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exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
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if (s->main_command) {
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