Files
linux/include/trace/events
Kohei Enju 3bfcf39608 net: validate skb->napi_id in RX tracepoints
Since commit 2bd82484bb ("xps: fix xps for stacked devices"),
skb->napi_id shares storage with sender_cpu. RX tracepoints using
net_dev_rx_verbose_template read skb->napi_id directly and can therefore
report sender_cpu values as if they were NAPI IDs.

For example, on the loopback path this can report 1 as napi_id, where 1
comes from raw_smp_processor_id() + 1 in the XPS path:

  # bpftrace -e 'tracepoint:net:netif_rx_entry{ print(args->napi_id); }'
  # taskset -c 0 ping -c 1 ::1

Report only valid NAPI IDs in these tracepoints and use 0 otherwise.

Fixes: 2bd82484bb ("xps: fix xps for stacked devices")
Signed-off-by: Kohei Enju <kohei@enjuk.jp>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Link: https://patch.msgid.link/20260420105427.162816-1-kohei@enjuk.jp
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-22 20:15:50 -07:00
..
2024-11-22 11:43:27 -07:00
2026-04-10 16:53:39 +08:00
2025-08-26 17:34:31 -07:00
2024-05-08 10:39:26 +01:00
2023-12-29 11:58:27 -08:00
2023-07-17 08:18:17 -06:00
2024-11-11 00:26:46 -08:00
2025-07-09 22:41:55 -07:00
2024-05-14 07:22:35 -06:00
2024-09-11 20:44:31 -07:00
2025-09-13 16:55:07 -07:00
2025-11-14 17:05:53 +01:00
2024-09-28 15:13:56 +02:00
2025-11-04 08:32:14 +01:00
2024-06-19 12:44:22 +01:00
2025-04-11 18:58:10 -07:00
2025-10-27 11:10:50 +00:00
2025-07-14 12:46:48 -04:00
2023-07-17 08:18:17 -06:00
2023-09-19 07:04:49 +02:00