[PATCH bpf-next v2 0/2] bpf: cpumap: improve error propagation in cpu_map_update_elem()

[Kohei Enju <enjuk@amazon.com>]

This series improves error propagation in cpumap and adds selftests that
cover the failure cases.

Currently, failures returned from __cpu_map_entry_alloc() are ignored
and always converted to -ENOMEM by cpu_map_update_elem(). This series
ensures the correct error propagation and adds selftests.

Changes:
  v2:
    - send to bpf-next, not to bpf
    - drop Fixes: tag
  v1: https://lore.kernel.org/bpf/20251128160504.57844-1-enjuk@amazon.com/

Kohei Enju (2):
  bpf: cpumap: propagate underlying error in cpu_map_update_elem()
  selftests/bpf: add tests for attaching invalid fd

 kernel/bpf/cpumap.c                           | 21 ++++++++++++-------
 .../bpf/prog_tests/xdp_cpumap_attach.c        | 19 +++++++++++++++--
 2 files changed, 30 insertions(+), 10 deletions(-)

-- 
2.51.0