On Mon, Dec 03, 2018 at 11:31:22AM +0000, Lorenz Bauer wrote: > Right now, there is no safe way to use BPF_PROG_TEST_RUN with data_out. > This is because bpf_test_finish copies the output buffer to user space > without checking its size. This can lead to the kernel overwriting > data in user space after the buffer if xdp_adjust_head and friends are > in play. > > Thanks to everyone for their advice and patience with this patch set! > > Changes in v5: > * Fix up libbpf.map > > Changes in v4: > * Document bpf_prog_test_run and bpf_prog_test_run_xattr > * Use struct bpf_prog_test_run_attr for return values > > Changes in v3: > * Introduce bpf_prog_test_run_xattr instead of modifying the existing > function > > Changes in v2: > * Make the syscall return ENOSPC if data_size_out is too small > * Make bpf_prog_test_run return EINVAL if size_out is missing > * Document the new behaviour of data_size_out Applied, Thanks
