UPSTREAM: selftests/bpf: validate that tail call invalidates packet pointers

commit d9706b56 upstream.

Add a test case with a tail call done from a global sub-program. Such
tails calls should be considered as invalidating packet pointers.

Change-Id: I4edd832d6acf01d9a61e3e74c5964932c4553cfb
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20241210041100.1898468-9-eddyz87@gmail.com


Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 1062b761)
Bug: 437846539
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>