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From 6a50c735a3bbf98d06fbfa7815f7bdc14ea96f9f Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Wed, 14 Oct 2020 14:03:13 +0200
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Subject: [PATCH] sd-bus: break the loop in bus_ensure_running() if the bus is
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not connecting
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This might fix #17025:
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> the call trace is
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> bus_ensure_running -> sd_bus_process -> bus_process_internal -> process_closeing --> sd_bus_close
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> |
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> \-> process_match
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We ended doing callouts to the Disconnected matches from bus_ensure_running()
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and shouldn't. bus_ensure_running() should never do callouts. This change
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should fix this however: once we notice that the connection is going down we
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will now fail instantly with ENOTOCONN instead of calling any callbacks.
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(cherry picked from commit 93a59b1ae5d3bcb0ec1488ebc13d0d1ff4d1729a)
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Resolves: #1885553
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---
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src/libsystemd/sd-bus/sd-bus.c | 5 +++--
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1 file changed, 3 insertions(+), 2 deletions(-)
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diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c
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index a3509f7e89..c65e24b2d1 100644
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--- a/src/libsystemd/sd-bus/sd-bus.c
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+++ b/src/libsystemd/sd-bus/sd-bus.c
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@@ -2059,12 +2059,13 @@ int bus_ensure_running(sd_bus *bus) {
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assert(bus);
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- if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING))
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- return -ENOTCONN;
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if (bus->state == BUS_RUNNING)
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return 1;
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for (;;) {
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+ if (IN_SET(bus->state, BUS_UNSET, BUS_CLOSED, BUS_CLOSING))
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+ return -ENOTCONN;
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+
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r = sd_bus_process(bus, NULL);
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if (r < 0)
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return r;
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