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portabled: refuse queries for empty image name

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I took inspiration from pid1:
bus_unit_find()
  → find_unit()
    → manager_load_unit_from_dbus_path()
      → unit_name_from_dbus_path()
        → !startswith(path, "/org/freedesktop/systemd1/unit/")
          → return -EINVAL
          ←
        ←
      ←
    ← if (r < 0) return 0
  ← 0
←

i.e. we return 0 when queried for "/org/freedesktop/systemd1/unit".

Fixes #23445.

(cherry picked from commit 4313e2b69f)
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2022-05-20 14:53:22 +02:00
parent 7ff8ddd623
commit a03ce6d1a2
1 changed files with 3 additions and 0 deletions
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3
src/portable/portabled-image-bus.c
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@ -1093,6 +1093,9 @@ int bus_image_object_find(
return 0;
if (r == 0)
goto not_found;
if (isempty(e))
/* The path is "/org/freedesktop/portable1/image" itself */
goto not_found;
r = bus_image_acquire(m, sd_bus_get_current_message(bus), e, NULL, BUS_IMAGE_REFUSE_BY_PATH, NULL, &image, error);
if (r == -ENOENT)