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[Magali Lemes do Sacramento <2067642@xxxxxxxxxxxxxxxxxx>]

This seems to have emerged with the addition of -D_FORTIFY_SOURCE=3 to the default build flags of gcc in 24.04.
With that flag set, a buffer overflow is detected at strcpy[1], which could (seems to) be a false positive. Unsure if a proper fix would be changing that to memcpy or even understanding gcc's assumptions here 😀

[1]: https://git.launchpad.net/~ubuntu-
kernel/ubuntu/+source/linux/+git/noble/tree/tools/testing/selftests/net/tap.c?h=Ubuntu-6.8.0-38.38#n70

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https://bugs.launchpad.net/bugs/2067642

Title:
  net:tap in ubuntu_kselftests_net fails on Noble

Status in ubuntu-kernel-tests:
  New

Bug description:
  The following issue has been found in net:tap in ubuntu_kselftests_net
  on multiple noble kernels (including generic, realtime, and ibm):

   8819  14:42:24 DEBUG| [stdout] TAP version 13
   8820  14:42:24 DEBUG| [stdout] 1..1
   8821  14:42:24 DEBUG| [stdout] # timeout set to 0
   8822  14:42:24 DEBUG| [stdout] # selftests: net: tap
   8823  14:42:24 DEBUG| [stdout] # TAP version 13
   8824  14:42:24 DEBUG| [stdout] # 1..3
   8825  14:42:24 DEBUG| [stdout] # # Starting 3 tests from 1 test cases.
   8826  14:42:24 DEBUG| [stdout] # #  RUN           tap.test_packet_valid_udp_gso ...
   8827  14:42:24 DEBUG| [stdout] # *** buffer overflow detected ***: terminated
   8828  14:42:24 DEBUG| [stdout] # # test_packet_valid_udp_gso: Test terminated by assertion
   8829  14:42:24 DEBUG| [stdout] # #          FAIL  tap.test_packet_valid_udp_gso
   8830  14:42:24 DEBUG| [stdout] # not ok 1 tap.test_packet_valid_udp_gso
   8831  14:42:24 DEBUG| [stdout] # #  RUN           tap.test_packet_valid_udp_csum ...
   8832  14:42:24 DEBUG| [stdout] # *** buffer overflow detected ***: terminated
   8833  14:42:25 DEBUG| [stdout] # # test_packet_valid_udp_csum: Test terminated by assertion
   8834  14:42:25 DEBUG| [stdout] # #          FAIL  tap.test_packet_valid_udp_csum
   8835  14:42:25 DEBUG| [stdout] # not ok 2 tap.test_packet_valid_udp_csum
   8836  14:42:25 DEBUG| [stdout] # #  RUN           tap.test_packet_crash_tap_invalid_eth_proto ...
   8837  14:42:25 DEBUG| [stdout] # *** buffer overflow detected ***: terminated
   8838  14:42:25 DEBUG| [stdout] # # test_packet_crash_tap_invalid_eth_proto: Test terminated by assertion
   8839  14:42:25 DEBUG| [stdout] # #          FAIL  tap.test_packet_crash_tap_invalid_eth_proto
   8840  14:42:25 DEBUG| [stdout] # not ok 3 tap.test_packet_crash_tap_invalid_eth_proto
   8841  14:42:25 DEBUG| [stdout] # # FAILED: 0 / 3 tests passed.
   8842  14:42:25 DEBUG| [stdout] # # Totals: pass:0 fail:3 xfail:0 xpass:0 skip:0 error:0

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