From 70bc558cc10685b1e67f493415de17ebfc5138c5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= Date: Thu, 19 Mar 2020 21:30:44 +0100 Subject: [PATCH] sd-bus: support SD_BUS_DEFAULT* and don't crash in functions where bus is optional In those functions where bus defaults to the m->bus, we should also resolve the magic parameters. And if neither called with bus=NULL and an unattached message, return properly instead of crashing in assert later. --- src/libsystemd/sd-bus/sd-bus.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) diff --git a/src/libsystemd/sd-bus/sd-bus.c b/src/libsystemd/sd-bus/sd-bus.c index acfff6d28e..58c4571819 100644 --- a/src/libsystemd/sd-bus/sd-bus.c +++ b/src/libsystemd/sd-bus/sd-bus.c @@ -1899,9 +1899,10 @@ _public_ int sd_bus_send(sd_bus *bus, sd_bus_message *_m, uint64_t *cookie) { assert_return(m, -EINVAL); - if (!bus) - bus = m->bus; - + if (bus) + assert_return(bus = bus_resolve(bus), -ENOPKG); + else + assert_return(bus = m->bus, -ENOTCONN); assert_return(!bus_pid_changed(bus), -ECHILD); if (!BUS_IS_OPEN(bus->state)) @@ -1983,9 +1984,10 @@ _public_ int sd_bus_send_to(sd_bus *bus, sd_bus_message *m, const char *destinat assert_return(m, -EINVAL); - if (!bus) - bus = m->bus; - + if (bus) + assert_return(bus = bus_resolve(bus), -ENOPKG); + else + assert_return(bus = m->bus, -ENOTCONN); assert_return(!bus_pid_changed(bus), -ECHILD); if (!BUS_IS_OPEN(bus->state)) @@ -2048,9 +2050,10 @@ _public_ int sd_bus_call_async( assert_return(m->header->type == SD_BUS_MESSAGE_METHOD_CALL, -EINVAL); assert_return(!m->sealed || (!!callback == !(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)), -EINVAL); - if (!bus) - bus = m->bus; - + if (bus) + assert_return(bus = bus_resolve(bus), -ENOPKG); + else + assert_return(bus = m->bus, -ENOTCONN); assert_return(!bus_pid_changed(bus), -ECHILD); if (!BUS_IS_OPEN(bus->state)) @@ -2154,9 +2157,10 @@ _public_ int sd_bus_call( bus_assert_return(!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED), -EINVAL, error); bus_assert_return(!bus_error_is_dirty(error), -EINVAL, error); - if (!bus) - bus = m->bus; - + if (bus) + assert_return(bus = bus_resolve(bus), -ENOPKG); + else + assert_return(bus = m->bus, -ENOTCONN); bus_assert_return(!bus_pid_changed(bus), -ECHILD, error); if (!BUS_IS_OPEN(bus->state)) {