[PATCH] bpf: cpumap: add missing XDP_ABORTED handling in xdp prog runner

[Anand Kumar Shaw <anandkrshawheritage@gmail.com>]

cpu_map_bpf_prog_run_xdp() does not handle XDP_ABORTED, causing it
to fall through to the default case which calls
bpf_warn_invalid_xdp_action(). XDP_ABORTED is a valid action that
signals an exception in the BPF program — it should fire
trace_xdp_exception() and drop the frame without a spurious warning.

The SKB path in the same file (cpu_map_bpf_prog_run_skb) and devmap's
dev_map_bpf_prog_run() both handle XDP_ABORTED correctly. Add the
missing case to match.

Signed-off-by: Anand Kumar Shaw <anandkrshawheritage@gmail.com>
---
 kernel/bpf/cpumap.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index 04171fbc3..b1fe83eeb 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -223,6 +223,9 @@ static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,
 		default:
 			bpf_warn_invalid_xdp_action(NULL, rcpu->prog, act);
 			fallthrough;
+		case XDP_ABORTED:
+			trace_xdp_exception(xdpf->dev_rx, rcpu->prog, act);
+			fallthrough;
 		case XDP_DROP:
 			xdp_return_frame(xdpf);
 			stats->drop++;
-- 
2.39.5 (Apple Git-154)