As Thadeu mentioned, this happens because the test_bpf module doesn't go through the verifier causing the failure when the code is not jitted. Upstream fixed the testcase with 21ccaf21497b (bpf: add further test cases around div/mod and others) by replacing "INT: DIV by zero" by "INT: DIV by -1" on test_bpf and moving/adding the div by zero tests to tools/testing/selftests/bpf/test_verifier.c.
Changing the div test from zero to -1 in bionic is trivial, however this would leave the zero case uncovered. Making the proper fix would require backporting 21ccaf21497b, which in turn would need at least 87c1793b1b7f (bpf: add couple of test cases for div/mod by zero) and 111e6b45315c (selftests/bpf: make test_verifier run most programs) but possibly many others. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1934414 Title: test_bpf.sh from ubuntu_kernel_selftests.net from linux ADT test failure with linux/4.15.0-149.153 i386 (Segmentation fault) Status in ubuntu-kernel-tests: New Status in linux package in Ubuntu: Invalid Status in linux source package in Bionic: In Progress Bug description: This is a scripted bug report about ADT failures while running linux tests for linux/4.15.0-149.153 on bionic. Whether this is caused by the dep8 tests of the tested source or the kernel has yet to be determined. Testing failed on: i386: https://autopkgtest.ubuntu.com/results/autopkgtest-bionic/bionic/i386/l/linux/20210702_010055_445cd@/log.gz 03:37:02 DEBUG| [stdout] selftests: test_bpf.sh 03:37:02 DEBUG| [stdout] ======================================== 03:37:03 ERROR| [stderr] Segmentation fault 03:37:03 DEBUG| [stdout] test_bpf: [FAIL] 03:37:03 DEBUG| [stdout] not ok 1..8 selftests: test_bpf.sh [FAIL] 03:37:03 DEBUG| [stdout] selftests: netdevice.sh 03:37:03 DEBUG| [stdout] ======================================== To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1934414/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
