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From 4e78db7126779a9f6432ead9a73cdab1087405bc Mon Sep 17 00:00:00 2001
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From: Lukas Nykryn <lnykryn@redhat.com>
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Date: Fri, 17 Apr 2015 15:12:00 +0200
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Subject: [PATCH] machine: do not rely on asprintf setting arg on error
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Strictly speaking, the output variable is undefined if asprintf fails.
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We use the return value not the arg everywhere, and should we do here.
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(Based on 2c07315225bef6be4830bce25a74da7f0ba4fcdc)
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---
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src/machine/machine-dbus.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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diff --git a/src/machine/machine-dbus.c b/src/machine/machine-dbus.c
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index b0f0f66e09..624a99f4e9 100644
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--- a/src/machine/machine-dbus.c
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+++ b/src/machine/machine-dbus.c
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@@ -438,6 +438,7 @@ int bus_machine_method_open_login(sd_bus *bus, sd_bus_message *message, void *us
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_cleanup_close_ int master = -1;
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Machine *m = userdata;
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const char *p;
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+ char *address;
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int r;
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if (m->class != MACHINE_CONTAINER)
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@@ -475,13 +476,14 @@ int bus_machine_method_open_login(sd_bus *bus, sd_bus_message *message, void *us
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return r;
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#ifdef ENABLE_KDBUS
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- asprintf(&container_bus->address, "x-machine-kernel:pid=" PID_FMT ";x-machine-unix:pid=" PID_FMT, m->leader, m->leader);
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+# define ADDRESS_FMT "x-machine-kernel:pid=%1$" PID_PRI ";x-machine-unix:pid=%1$" PID_PRI
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#else
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- asprintf(&container_bus->address, "x-machine-unix:pid=" PID_FMT, m->leader);
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+# define ADDRESS_FMT "x-machine-unix:pid=%1$" PID_PRI
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#endif
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- if (!container_bus->address)
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- return -ENOMEM;
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+ if (asprintf(&address, ADDRESS_FMT, m->leader) < 0)
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+ return log_oom();
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+ container_bus->address = address;
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container_bus->bus_client = true;
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container_bus->trusted = false;
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container_bus->is_system = true;
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