summaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
authorDavid Herrmann <dh.herrmann@gmail.com>2015-06-14 15:08:52 +0200
committerDavid Herrmann <dh.herrmann@gmail.com>2015-06-14 15:08:52 +0200
commite7e55dbdc38f929805ab2407fbd50886043a9e7c (patch)
tree8b159323816ae571765dbbd883f3f0d7a0ba3a4e /src
parentaa75494ad5cdf7bede947212ad8c8356d78580fa (diff)
tree-wide: fix memory leaks in users of bus_map_all_properties()
If you use bus_map_all_properties(), you must be aware that it might touch output variables even though it may fail. This is, because we parse many different bus-properties and cannot tell how to clean them up, in case we fail deep down in the parser. Fix all callers of bus_map_all_properties() to correctly cleanup any context structures at all times.
Diffstat (limited to 'src')
-rw-r--r--src/locale/localectl.c35
-rw-r--r--src/login/loginctl.c105
-rw-r--r--src/machine/machinectl.c48
-rw-r--r--src/systemctl/systemctl.c21
-rw-r--r--src/timedate/timedatectl.c17
5 files changed, 144 insertions, 82 deletions
diff --git a/src/locale/localectl.c b/src/locale/localectl.c
index 8c60339e3e..601839d5dc 100644
--- a/src/locale/localectl.c
+++ b/src/locale/localectl.c
@@ -69,14 +69,27 @@ static void polkit_agent_open_if_enabled(void) {
typedef struct StatusInfo {
char **locale;
- const char *vconsole_keymap;
- const char *vconsole_keymap_toggle;
- const char *x11_layout;
- const char *x11_model;
- const char *x11_variant;
- const char *x11_options;
+ char *vconsole_keymap;
+ char *vconsole_keymap_toggle;
+ char *x11_layout;
+ char *x11_model;
+ char *x11_variant;
+ char *x11_options;
} StatusInfo;
+static void status_info_clear(StatusInfo *info) {
+ if (info) {
+ strv_free(info->locale);
+ free(info->vconsole_keymap);
+ free(info->vconsole_keymap_toggle);
+ free(info->x11_layout);
+ free(info->x11_model);
+ free(info->x11_variant);
+ free(info->x11_options);
+ zero(*info);
+ }
+}
+
static void print_overridden_variables(void) {
int r;
char *variables[_VARIABLE_LC_MAX] = {};
@@ -150,7 +163,7 @@ static void print_status_info(StatusInfo *i) {
}
static int show_status(sd_bus *bus, char **args, unsigned n) {
- StatusInfo info = {};
+ _cleanup_(status_info_clear) StatusInfo info = {};
static const struct bus_properties_map map[] = {
{ "VConsoleKeymap", "s", NULL, offsetof(StatusInfo, vconsole_keymap) },
{ "VConsoleKeymap", "s", NULL, offsetof(StatusInfo, vconsole_keymap) },
@@ -171,16 +184,12 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
"/org/freedesktop/locale1",
map,
&info);
- if (r < 0) {
- log_error_errno(r, "Could not get properties: %m");
- goto fail;
- }
+ if (r < 0)
+ return log_error_errno(r, "Could not get properties: %m");
print_overridden_variables();
print_status_info(&info);
-fail:
- strv_free(info.locale);
return r;
}
diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 02d240c704..06208bc4b3 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -277,42 +277,81 @@ static int show_unit_cgroup(sd_bus *bus, const char *interface, const char *unit
}
typedef struct SessionStatusInfo {
- const char *id;
+ char *id;
uid_t uid;
- const char *name;
+ char *name;
struct dual_timestamp timestamp;
unsigned int vtnr;
- const char *seat;
- const char *tty;
- const char *display;
+ char *seat;
+ char *tty;
+ char *display;
bool remote;
- const char *remote_host;
- const char *remote_user;
- const char *service;
+ char *remote_host;
+ char *remote_user;
+ char *service;
pid_t leader;
- const char *type;
- const char *class;
- const char *state;
- const char *scope;
- const char *desktop;
+ char *type;
+ char *class;
+ char *state;
+ char *scope;
+ char *desktop;
} SessionStatusInfo;
typedef struct UserStatusInfo {
uid_t uid;
- const char *name;
+ char *name;
struct dual_timestamp timestamp;
- const char *state;
+ char *state;
char **sessions;
- const char *display;
- const char *slice;
+ char *display;
+ char *slice;
} UserStatusInfo;
typedef struct SeatStatusInfo {
- const char *id;
- const char *active_session;
+ char *id;
+ char *active_session;
char **sessions;
} SeatStatusInfo;
+static void session_status_info_clear(SessionStatusInfo *info) {
+ if (info) {
+ free(info->id);
+ free(info->name);
+ free(info->seat);
+ free(info->tty);
+ free(info->display);
+ free(info->remote_host);
+ free(info->remote_user);
+ free(info->service);
+ free(info->type);
+ free(info->class);
+ free(info->state);
+ free(info->scope);
+ free(info->desktop);
+ zero(*info);
+ }
+}
+
+static void user_status_info_clear(UserStatusInfo *info) {
+ if (info) {
+ free(info->name);
+ free(info->state);
+ strv_free(info->sessions);
+ free(info->display);
+ free(info->slice);
+ zero(*info);
+ }
+}
+
+static void seat_status_info_clear(SeatStatusInfo *info) {
+ if (info) {
+ free(info->id);
+ free(info->active_session);
+ strv_free(info->sessions);
+ zero(*info);
+ }
+}
+
static int prop_map_first_of_struct(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
const char *contents;
int r;
@@ -404,7 +443,7 @@ static int print_session_status_info(sd_bus *bus, const char *path, bool *new_li
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char since2[FORMAT_TIMESTAMP_MAX], *s2;
- SessionStatusInfo i = {};
+ _cleanup_(session_status_info_clear) SessionStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
@@ -532,14 +571,12 @@ static int print_user_status_info(sd_bus *bus, const char *path, bool *new_line)
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char since2[FORMAT_TIMESTAMP_MAX], *s2;
- UserStatusInfo i = {};
+ _cleanup_(user_status_info_clear) UserStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
- if (r < 0) {
- log_error_errno(r, "Could not get properties: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Could not get properties: %m");
if (*new_line)
printf("\n");
@@ -594,10 +631,7 @@ static int print_user_status_info(sd_bus *bus, const char *path, bool *new_line)
NULL);
}
-finish:
- strv_free(i.sessions);
-
- return r;
+ return 0;
}
static int print_seat_status_info(sd_bus *bus, const char *path, bool *new_line) {
@@ -609,14 +643,12 @@ static int print_seat_status_info(sd_bus *bus, const char *path, bool *new_line)
{}
};
- SeatStatusInfo i = {};
+ _cleanup_(seat_status_info_clear) SeatStatusInfo i = {};
int r;
r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
- if (r < 0) {
- log_error_errno(r, "Could not get properties: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Could not get properties: %m");
if (*new_line)
printf("\n");
@@ -653,10 +685,7 @@ static int print_seat_status_info(sd_bus *bus, const char *path, bool *new_line)
show_sysfs(i.id, "\t\t ", c);
}
-finish:
- strv_free(i.sessions);
-
- return r;
+ return 0;
}
static int show_properties(sd_bus *bus, const char *path, bool *new_line) {
diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c
index c86c36c2de..719eb10932 100644
--- a/src/machine/machinectl.c
+++ b/src/machine/machinectl.c
@@ -500,6 +500,18 @@ typedef struct MachineStatusInfo {
unsigned n_netif;
} MachineStatusInfo;
+static void machine_status_info_clear(MachineStatusInfo *info) {
+ if (info) {
+ free(info->name);
+ free(info->class);
+ free(info->service);
+ free(info->unit);
+ free(info->root_directory);
+ free(info->netif);
+ zero(*info);
+ }
+}
+
static void print_machine_status_info(sd_bus *bus, MachineStatusInfo *i) {
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char since2[FORMAT_TIMESTAMP_MAX], *s2;
@@ -636,7 +648,7 @@ static int show_machine_info(const char *verb, sd_bus *bus, const char *path, bo
{}
};
- MachineStatusInfo info = {};
+ _cleanup_(machine_status_info_clear) MachineStatusInfo info = {};
int r;
assert(verb);
@@ -658,13 +670,6 @@ static int show_machine_info(const char *verb, sd_bus *bus, const char *path, bo
print_machine_status_info(bus, &info);
- free(info.name);
- free(info.class);
- free(info.service);
- free(info.unit);
- free(info.root_directory);
- free(info.netif);
-
return r;
}
@@ -753,6 +758,15 @@ typedef struct ImageStatusInfo {
uint64_t limit_exclusive;
} ImageStatusInfo;
+static void image_status_info_clear(ImageStatusInfo *info) {
+ if (info) {
+ free(info->name);
+ free(info->path);
+ free(info->type);
+ zero(*info);
+ }
+}
+
static void print_image_status_info(sd_bus *bus, ImageStatusInfo *i) {
char ts_relative[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
char ts_absolute[FORMAT_TIMESTAMP_MAX], *s2;
@@ -823,7 +837,7 @@ static int show_image_info(sd_bus *bus, const char *path, bool *new_line) {
{}
};
- ImageStatusInfo info = {};
+ _cleanup_(image_status_info_clear) ImageStatusInfo info = {};
int r;
assert(bus);
@@ -844,10 +858,6 @@ static int show_image_info(sd_bus *bus, const char *path, bool *new_line) {
print_image_status_info(bus, &info);
- free(info.name);
- free(info.path);
- free(info.type);
-
return r;
}
@@ -857,6 +867,15 @@ typedef struct PoolStatusInfo {
uint64_t limit;
} PoolStatusInfo;
+static void pool_status_info_clear(PoolStatusInfo *info) {
+ if (info) {
+ free(info->path);
+ zero(*info);
+ info->usage = -1;
+ info->limit = -1;
+ }
+}
+
static void print_pool_status_info(sd_bus *bus, PoolStatusInfo *i) {
char bs[FORMAT_BYTES_MAX], *s;
@@ -881,7 +900,7 @@ static int show_pool_info(sd_bus *bus) {
{}
};
- PoolStatusInfo info = {
+ _cleanup_(pool_status_info_clear) PoolStatusInfo info = {
.usage = (uint64_t) -1,
.limit = (uint64_t) -1,
};
@@ -899,7 +918,6 @@ static int show_pool_info(sd_bus *bus) {
print_pool_status_info(bus, &info);
- free(info.path);
return 0;
}
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 5075e4e176..a2eb435fce 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -1678,17 +1678,23 @@ static const struct bus_properties_map machine_info_property_map[] = {
{}
};
+static void machine_info_clear(struct machine_info *info) {
+ if (info) {
+ free(info->name);
+ free(info->state);
+ free(info->control_group);
+ zero(*info);
+ }
+}
+
static void free_machines_list(struct machine_info *machine_infos, int n) {
int i;
if (!machine_infos)
return;
- for (i = 0; i < n; i++) {
- free(machine_infos[i].name);
- free(machine_infos[i].state);
- free(machine_infos[i].control_group);
- }
+ for (i = 0; i < n; i++)
+ machine_info_clear(&machine_infos[i]);
free(machine_infos);
}
@@ -4402,7 +4408,7 @@ static int show_all(
static int show_system_status(sd_bus *bus) {
char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], since2[FORMAT_TIMESTAMP_MAX];
_cleanup_free_ char *hn = NULL;
- struct machine_info mi = {};
+ _cleanup_(machine_info_clear) struct machine_info mi = {};
const char *on, *off;
int r;
@@ -4449,9 +4455,6 @@ static int show_system_status(sd_bus *bus) {
show_cgroup(SYSTEMD_CGROUP_CONTROLLER, strempty(mi.control_group), prefix, c, false, get_output_flags());
}
- free(mi.state);
- free(mi.control_group);
-
return 0;
}
diff --git a/src/timedate/timedatectl.c b/src/timedate/timedatectl.c
index 61b6e765c7..195d5f3892 100644
--- a/src/timedate/timedatectl.c
+++ b/src/timedate/timedatectl.c
@@ -73,6 +73,13 @@ typedef struct StatusInfo {
bool ntp_synced;
} StatusInfo;
+static void status_info_clear(StatusInfo *info) {
+ if (info) {
+ free(info->timezone);
+ zero(*info);
+ }
+}
+
static void print_status_info(const StatusInfo *i) {
char a[FORMAT_TIMESTAMP_MAX];
struct tm tm;
@@ -155,7 +162,7 @@ static void print_status_info(const StatusInfo *i) {
}
static int show_status(sd_bus *bus, char **args, unsigned n) {
- StatusInfo info = {};
+ _cleanup_(status_info_clear) StatusInfo info = {};
static const struct bus_properties_map map[] = {
{ "Timezone", "s", NULL, offsetof(StatusInfo, timezone) },
{ "LocalRTC", "b", NULL, offsetof(StatusInfo, rtc_local) },
@@ -175,15 +182,11 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
"/org/freedesktop/timedate1",
map,
&info);
- if (r < 0) {
- log_error_errno(r, "Failed to query server: %m");
- goto fail;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to query server: %m");
print_status_info(&info);
-fail:
- free(info.timezone);
return r;
}