From e75cd4c1e74bf004a1bea586bae72fb11ed35d9f Mon Sep 17 00:00:00 2001 From: Christian Hesse Date: Thu, 26 May 2016 15:57:37 +0200 Subject: {machine,system}ctl: always pass &changes and &n_changes (#3350) We have to pass addresses of changes and n_changes to bus_deserialize_and_dump_unit_file_changes(). Otherwise we are hit by missing information (subsequent calls to unit_file_changes_add() to not add anything). Also prevent null pointer dereference in bus_deserialize_and_dump_unit_file_changes() by asserting. Fixes #3339 --- src/machine/machinectl.c | 15 ++++++++--- src/shared/bus-unit-util.c | 5 ++++ src/systemctl/systemctl.c | 64 +++++++++++++++++++++++++++------------------- 3 files changed, 53 insertions(+), 31 deletions(-) diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c index 1165ab5afa..8e4ffa9a39 100644 --- a/src/machine/machinectl.c +++ b/src/machine/machinectl.c @@ -1602,6 +1602,8 @@ static int start_machine(int argc, char *argv[], void *userdata) { static int enable_machine(int argc, char *argv[], void *userdata) { _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; + UnitFileChange *changes = NULL; + unsigned n_changes = 0; int carries_install_info = 0; const char *method = NULL; sd_bus *bus = userdata; @@ -1662,9 +1664,9 @@ static int enable_machine(int argc, char *argv[], void *userdata) { return bus_log_parse_error(r); } - r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, NULL, NULL); + r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes); if (r < 0) - return r; + goto finish; r = sd_bus_call_method( bus, @@ -1677,10 +1679,15 @@ static int enable_machine(int argc, char *argv[], void *userdata) { NULL); if (r < 0) { log_error("Failed to reload daemon: %s", bus_error_message(&error, -r)); - return r; + goto finish; } - return 0; + r = 0; + +finish: + unit_file_changes_free(changes, n_changes); + + return r; } static int match_log_message(sd_bus_message *m, void *userdata, sd_bus_error *error) { diff --git a/src/shared/bus-unit-util.c b/src/shared/bus-unit-util.c index f6559cd854..f68c4a41ac 100644 --- a/src/shared/bus-unit-util.c +++ b/src/shared/bus-unit-util.c @@ -865,6 +865,11 @@ int bus_deserialize_and_dump_unit_file_changes(sd_bus_message *m, bool quiet, Un const char *type, *path, *source; int r; + /* changes is dereferenced when calling unit_file_dump_changes() later, + * so we have to make sure this is not NULL. */ + assert(changes); + assert(n_changes); + r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sss)"); if (r < 0) return bus_log_parse_error(r); diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c index b943c68e1b..0500593d06 100644 --- a/src/systemctl/systemctl.c +++ b/src/systemctl/systemctl.c @@ -2058,6 +2058,8 @@ static int get_default(int argc, char *argv[], void *userdata) { static int set_default(int argc, char *argv[], void *userdata) { _cleanup_free_ char *unit = NULL; + UnitFileChange *changes = NULL; + unsigned n_changes = 0; int r; assert(argc >= 2); @@ -2068,13 +2070,8 @@ static int set_default(int argc, char *argv[], void *userdata) { return log_error_errno(r, "Failed to mangle unit name: %m"); if (install_client_side()) { - UnitFileChange *changes = NULL; - unsigned n_changes = 0; - r = unit_file_set_default(arg_scope, arg_root, unit, true, &changes, &n_changes); unit_file_dump_changes(r, "set default", changes, n_changes, arg_quiet); - unit_file_changes_free(changes, n_changes); - return r; } else { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; @@ -2098,9 +2095,9 @@ static int set_default(int argc, char *argv[], void *userdata) { if (r < 0) return log_error_errno(r, "Failed to set default target: %s", bus_error_message(&error, r)); - r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, NULL, NULL); + r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes); if (r < 0) - return r; + goto finish; /* Try to reload if enabled */ if (!arg_no_reload) @@ -2109,6 +2106,9 @@ static int set_default(int argc, char *argv[], void *userdata) { r = 0; } +finish: + unit_file_changes_free(changes, n_changes); + return r; } @@ -5650,6 +5650,8 @@ static int add_dependency(int argc, char *argv[], void *userdata) { _cleanup_strv_free_ char **names = NULL; _cleanup_free_ char *target = NULL; const char *verb = argv[0]; + UnitFileChange *changes = NULL; + unsigned n_changes = 0; UnitDependency dep; int r = 0; @@ -5672,13 +5674,8 @@ static int add_dependency(int argc, char *argv[], void *userdata) { assert_not_reached("Unknown verb"); if (install_client_side()) { - UnitFileChange *changes = NULL; - unsigned n_changes = 0; - r = unit_file_add_dependency(arg_scope, arg_runtime, arg_root, names, target, dep, arg_force, &changes, &n_changes); unit_file_dump_changes(r, "add dependency on", changes, n_changes, arg_quiet); - unit_file_changes_free(changes, n_changes); - return r; } else { _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL, *m = NULL; _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; @@ -5712,27 +5709,32 @@ static int add_dependency(int argc, char *argv[], void *userdata) { if (r < 0) return log_error_errno(r, "Failed to add dependency: %s", bus_error_message(&error, r)); - r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, NULL, NULL); + r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes); if (r < 0) - return r; + goto finish; - if (arg_no_reload) - return 0; - return daemon_reload(argc, argv, userdata); + if (arg_no_reload) { + r = 0; + goto finish; + } + + r = daemon_reload(argc, argv, userdata); } + +finish: + unit_file_changes_free(changes, n_changes); + + return r; } static int preset_all(int argc, char *argv[], void *userdata) { + UnitFileChange *changes = NULL; + unsigned n_changes = 0; int r; if (install_client_side()) { - UnitFileChange *changes = NULL; - unsigned n_changes = 0; - r = unit_file_preset_all(arg_scope, arg_runtime, arg_root, arg_preset_mode, arg_force, &changes, &n_changes); unit_file_dump_changes(r, "preset", changes, n_changes, arg_quiet); - unit_file_changes_free(changes, n_changes); - return r; } else { _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; @@ -5759,14 +5761,22 @@ static int preset_all(int argc, char *argv[], void *userdata) { if (r < 0) return log_error_errno(r, "Failed to preset all units: %s", bus_error_message(&error, r)); - r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, NULL, NULL); + r = bus_deserialize_and_dump_unit_file_changes(reply, arg_quiet, &changes, &n_changes); if (r < 0) - return r; + goto finish; - if (arg_no_reload) - return 0; - return daemon_reload(argc, argv, userdata); + if (arg_no_reload) { + r = 0; + goto finish; + } + + r = daemon_reload(argc, argv, userdata); } + +finish: + unit_file_changes_free(changes, n_changes); + + return r; } static int unit_is_enabled(int argc, char *argv[], void *userdata) { -- cgit v1.2.3-54-g00ecf