bus: send attach flags on BUS_MAKE

Make sure to set send-attach-flags on BUS_MAKE. These control which
information is revealed about the bus-owner.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index d910d8e49..cdca48d92 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -1510,6 +1510,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         make = alloca0_align(offsetof(struct kdbus_cmd_make, items) +
                              ALIGN8(offsetof(struct kdbus_item, bloom_parameter) + sizeof(struct kdbus_bloom_parameter)) +
                              ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)) +
+                             ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)) +
                              ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + l + 1),
                              8);
 
@@ -1536,6 +1537,13 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         n->data64[0] = _KDBUS_ATTACH_ANY;
         make->size += ALIGN8(n->size);
 
+        /* Provide all metadata via bus-owner queries */
+        n = KDBUS_ITEM_NEXT(n);
+        n->type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
+        n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t);
+        n->data64[0] = _KDBUS_ATTACH_ANY;
+        make->size += ALIGN8(n->size);
+
         /* Set the a good name */
         n = KDBUS_ITEM_NEXT(n);
         sprintf(n->str, UID_FMT "-%s", getuid(), name);