netdev - [TEST] tcp_zerocopy_maxfrags.pkt fails

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Message-ID: <20251124071831.4cbbf412@kernel.org>
Date: Mon, 24 Nov 2025 07:18:31 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Willem de Bruijn <willemb@...gle.com>
Cc: netdev@...r.kernel.org
Subject: [TEST] tcp_zerocopy_maxfrags.pkt fails

Hi Willem!

I migrated netdev CI to our own infra now, and the slightly faster,
Fedora-based system is failing tcp_zerocopy_maxfrags.pkt:

# tcp_zerocopy_maxfrags.pkt:56: error handling packet: incorrect outbound data payload
# script packet:  1.000237 P. 36:37(1) ack 1 
# actual packet:  1.000235 P. 36:37(1) ack 1 win 1050 
# not ok 1 ipv4
# tcp_zerocopy_maxfrags.pkt:56: error handling packet: incorrect outbound data payload
# script packet:  1.000209 P. 36:37(1) ack 1 
# actual packet:  1.000208 P. 36:37(1) ack 1 win 1050 
# not ok 2 ipv6
# # Totals: pass:0 fail:2 xfail:0 xpass:0 skip:0 error:0

https://netdev-ctrl.bots.linux.dev/logs/vmksft/packetdrill/results/399942/13-tcp-zerocopy-maxfrags-pkt/stdout

This happens on both debug and non-debug kernel (tho on the former 
the failure is masked due to MACHINE_SLOW).