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integration: add test for tagged→user-owned conversion panic

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Add TestTagsAuthKeyConvertToUserViaCLIRegister that reproduces the
exact panic from #3038: register a node with a tags-only PreAuthKey
(no user), force reauth with empty tags, then register via CLI with
a user. The mapper panics on node.Owner().Model().ID when User is nil.

The critical detail is using a tags-only PreAuthKey (User: nil). When
the key is created under a user, the node inherits the User pointer
from createAndSaveNewNode and the bug is masked.

Also add Owner() validity assertions to the existing unit test
TestTaggedNodeWithoutUserToDifferentUser to catch the nil pointer
at the unit test level.

Updates #3038
This commit is contained in:
Kristoffer Dalby
2026-02-02 14:53:27 +00:00
parent 80a34ec3c1
commit ea53078dde
3 changed files with 127 additions and 0 deletions
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7
hscontrol/auth_test.go
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@@ -3916,6 +3916,13 @@ func TestTaggedNodeWithoutUserToDifferentUser(t *testing.T) {
require.False(t, nodeAfterReauth.IsTagged(), "Node should no longer be tagged")
require.Empty(t, nodeAfterReauth.Tags().AsSlice(), "Node should have no tags")
// Verify Owner() works without panicking - this is what the mapper's
// generateUserProfiles calls, and it would panic with a nil pointer
// dereference if node.User was not set during the tag→user conversion.
owner := nodeAfterReauth.Owner()
require.True(t, owner.Valid(), "Owner should be valid after conversion (mapper would panic if nil)")
require.Equal(t, alice.ID, owner.Model().ID, "Owner should be alice")
t.Logf("Re-registration complete - Node ID: %d, Tags: %v, IsTagged: %t, UserID: %d",
nodeAfterReauth.ID().Uint64(), nodeAfterReauth.Tags().AsSlice(),
nodeAfterReauth.IsTagged(), nodeAfterReauth.UserID().Get())