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
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events	net: validate skb->napi_id in RX tracepoints	2026-04-22 20:15:50 -07:00
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bpf_probe.h	…
define_custom_trace.h	…
define_trace.h	…
perf.h	…
syscall.h	…
trace_custom_events.h	…
trace_events.h	…