[linus:master] [selftest] 400e658aa0: kernel-selftests-bpf.net.tun.fail

kernel test robot
2026-03-18T07:29:32Z

Hello,

kernel test robot noticed "kernel-selftests-bpf.net.tun.fail" on:

commit: 400e658aa096cda99b37ce806ed63cfe894c9566 ("selftest: tun: Add test for sending gso packet into tun")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master

[test failed on linus/master 80234b5ab240f52fa45d201e899e207b9265ef91]
[test failed on linux-next/master f90aadf1c67c8b4969d1e5e6d4fd7227adb6e4d7]

in testcase: kernel-selftests-bpf
version:
with following parameters:

group: net

config: x86_64-rhel-9.4-bpf
compiler: gcc-14
test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-9980XE CPU @ 3.00GHz (Skylake) with 32G memory

(please refer to attached dmesg/kmsg for entire log/backtrace)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <oliver.sang@intel.com>
| Closes: https://lore.kernel.org/oe-lkp/202603181411.24db1a78-lkp@intel.com

# timeout set to 3600
# selftests: net: tun
# TAP version 13
# 1..9
# # Starting 9 tests from 5 test cases.
# # RUN tun.delete_detach_close ...
# # OK tun.delete_detach_close
# ok 1 tun.delete_detach_close
# # RUN tun.detach_delete_close ...
# # OK tun.detach_delete_close
# ok 2 tun.detach_delete_close
# # RUN tun.detach_close_delete ...
# # OK tun.detach_close_delete
# ok 3 tun.detach_close_delete
# # RUN tun.reattach_delete_close ...
# # OK tun.reattach_delete_close
# ok 4 tun.reattach_delete_close
# # RUN tun.reattach_close_delete ...
# # OK tun.reattach_close_delete
# ok 5 tun.reattach_close_delete
# # RUN tun_vnet_udptnl.4in4_1mss.send_gso_packet ...
# # OK tun_vnet_udptnl.4in4_1mss.send_gso_packet
# ok 6 tun_vnet_udptnl.4in4_1mss.send_gso_packet
# # RUN tun_vnet_udptnl.6in4_1mss.send_gso_packet ...
# # tun.c:679:send_gso_packet:Expected ret (0) == variant->data_size (1402)
# # send_gso_packet: Test terminated by assertion
# # FAIL tun_vnet_udptnl.6in4_1mss.send_gso_packet
# not ok 7 tun_vnet_udptnl.6in4_1mss.send_gso_packet
# # RUN tun_vnet_udptnl.4in6_1mss.send_gso_packet ...
# # tun.c:679:send_gso_packet:Expected ret (0) == variant->data_size (1402)
# # send_gso_packet: Test terminated by assertion
# # FAIL tun_vnet_udptnl.4in6_1mss.send_gso_packet
# not ok 8 tun_vnet_udptnl.4in6_1mss.send_gso_packet
# # RUN tun_vnet_udptnl.6in6_1mss.send_gso_packet ...
# # tun.c:679:send_gso_packet:Expected ret (0) == variant->data_size (1382)
# # send_gso_packet: Test terminated by assertion
# # FAIL tun_vnet_udptnl.6in6_1mss.send_gso_packet
# not ok 9 tun_vnet_udptnl.6in6_1mss.send_gso_packet
# # FAILED: 6 / 9 tests passed.
# # Totals: pass:6 fail:3 xfail:0 xpass:0 skip:0 error:0
not ok 19 selftests: net: tun # exit=1
/bin/sh: 50: cannot create : Directory nonexistent
# timeout set to 3600
# selftests: net: altnames.sh
# TEST: altnames test [ OK ]
ok 20 selftests: net: altnames.sh
# timeout set to 3600
# selftests: net: amt.sh
# exec of "smcrouted" failed: No such file or directory
ok 21 selftests: net: amt.sh # SKIP
# timeout set to 3600

below [1] is from parent commit as a comparison.

The kernel config and materials to reproduce are available at:
https://download.01.org/0day-ci/archive/20260318/202603181411.24db1a78-lkp@intel.com

[1] from parent commit:
# timeout set to 3600
# selftests: net: tun
# TAP version 13
# 1..9
# # Starting 9 tests from 5 test cases.
# # RUN tun.delete_detach_close ...
# # OK tun.delete_detach_close
# ok 1 tun.delete_detach_close
# # RUN tun.detach_delete_close ...
# # OK tun.detach_delete_close
# ok 2 tun.detach_delete_close
# # RUN tun.detach_close_delete ...
# # OK tun.detach_close_delete
# ok 3 tun.detach_close_delete
# # RUN tun.reattach_delete_close ...
# # OK tun.reattach_delete_close
# ok 4 tun.reattach_delete_close
# # RUN tun.reattach_close_delete ...
# # OK tun.reattach_close_delete
# ok 5 tun.reattach_close_delete
# # RUN tun_vnet_udptnl.4in4udptnl.basic ...
# # OK tun_vnet_udptnl.4in4udptnl.basic
# ok 6 tun_vnet_udptnl.4in4udptnl.basic
# # RUN tun_vnet_udptnl.6in4udptnl.basic ...
# # OK tun_vnet_udptnl.6in4udptnl.basic
# ok 7 tun_vnet_udptnl.6in4udptnl.basic
# # RUN tun_vnet_udptnl.4in6udptnl.basic ...
# # OK tun_vnet_udptnl.4in6udptnl.basic
# ok 8 tun_vnet_udptnl.4in6udptnl.basic
# # RUN tun_vnet_udptnl.6in6udptnl.basic ...
# # OK tun_vnet_udptnl.6in6udptnl.basic
# ok 9 tun_vnet_udptnl.6in6udptnl.basic
# # PASSED: 9 / 9 tests passed.
# # Totals: pass:9 fail:0 xfail:0 xpass:0 skip:0 error:0
ok 19 selftests: net: tun

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