- Linux-kselftest-mirror - lists.linaro.org

[PATCH 0/3] firmware: selftest for request_firmware_into_buf

by Scott Branden

This patch series adds kernel selftest of request_firmware_into_buf. The API was added to the kernel previously untested. Also included in this patch series is a fix for a race condition discovered while testing request_firmware_into_buf. Mutex may not be correct final solution but demonstrates a fix to a race condition new test exposes. Scott Branden (3): test_firmware: add support for request_firmware_into_buf selftest: firmware: Add request_firmware_into_buf tests firmware: add mutex fw_lock_fallback for race condition drivers/base/firmware_loader/main.c | 15 +++++ lib/test_firmware.c | 50 +++++++++++++++- .../selftests/firmware/fw_filesystem.sh | 57 ++++++++++++++++++- tools/testing/selftests/firmware/fw_lib.sh | 11 ++++ 4 files changed, 129 insertions(+), 4 deletions(-) -- 2.17.1

6 years

4
15
0 0

[PATCH v14 00/18] kunit: introduce KUnit, the Linux kernel unit testing framework

by Brendan Higgins

## TL;DR This revision addresses comments from Shuah by removing two macros that were causing checkpatch errors. No API or major structual changes have been made since v13. ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM (however, KUnit still allows you to run tests on test machines or in VMs if you want[1]) and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in about a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ### What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ### Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ### More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here[2]. Additionally for convenience, I have applied these patches to a branch[3]. The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/rfc/v5.3/v14 branch. ## Changes Since Last Version - Removed to macros which helped define expectation and assertion macros; these values are now just copied and pasted. Change was made to fix checkpatch error, as suggested by Shuah. [1] https://google.github.io/kunit-docs/third_party/kernel/docs/usage.html#kuni… [2] https://google.github.io/kunit-docs/third_party/kernel/docs/ [3] https://kunit.googlesource.com/linux/+/kunit/rfc/v5.3/v14 -- 2.23.0.rc1.153.gdeed80330f-goog

6 years

2
33
0 0

next-20190823 kselftest results

by ci_notify＠linaro.org

Summary ------------------------------------------------------------------------ kernel: 5.3.0-rc5 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git branch: master git commit: 9733a7c62c66722bcfdb1a6fe4d35c497312d59a git describe: next-20190823 Test details: https://qa-reports.linaro.org/lkft/linux-next-oe/build/next-20190823 Regressions (compared to build next-20190819) ------------------------------------------------------------------------ i386: kselftest: * bpf_test_skb_cgroup_id.sh * cpufreq_main.sh juno-r2 - arm64: kselftest: * bpf_test_sock_addr.sh * cgroup_test_freezer qemu_arm: kselftest: * bpf_test_sock_addr.sh * timers_rtcpie qemu_x86_64: kselftest: * cgroup_test_freezer x15 - arm: kselftest: * cgroup_test_freezer * net_so_txtime.sh x86_64: kselftest: * bpf_test_skb_cgroup_id.sh * bpf_test_sock_addr.sh * cpufreq_main.sh Fixes (compared to build next-20190819) ------------------------------------------------------------------------ i386: kselftest: * bpf_test_xdp_vlan_mode_generic.sh juno-r2 - arm64: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh qemu_arm: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh qemu_arm64: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh qemu_i386: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh qemu_x86_64: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh * net_udpgso_bench.sh x15 - arm: kselftest: * bpf_test_sock_addr.sh * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh x86_64: kselftest: * bpf_test_xdp_vlan_mode_generic.sh * bpf_test_xdp_vlan_mode_native.sh In total: ------------------------------------------------------------------------ Ran 1384 total tests in the following environments and test suites. pass 776 fail 499 xfail 0 skip 109 Environments -------------- - dragonboard-410c - arm64 - hi6220-hikey - arm64 - i386 - juno-r2 - arm64 - qemu_arm - qemu_arm64 - qemu_i386 - qemu_x86_64 - x15 - arm - x86_64 Test Suites ----------- * boot-lkft-kselftests-master-591 * kselftest Failures ------------------------------------------------------------------------ dragonboard-410c: qemu_x86_64: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cgroup_test_freezer * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/x86_fsgsbase_64 x86: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_skb_cgroup_id.sh * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh qemu_arm64: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_verifier * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cgroup_test_freezer * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_mmio_warning_test * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/netfilter_conntrack_icmp_related.sh * kselftest/netfilter_nft_nat.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/pidfd_pidfd_test * kselftest/pidfd_pidfd_wait * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh juno-r2: * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_verifier * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cgroup_test_freezer * kselftest/cpufreq_main.sh i386: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_hashmap * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_skb_cgroup_id.sh * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_mmio_warning_test * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/timestamping_txtimestamp.sh hi6220-hikey: * boot-lkft-kselftests-master-591/hi6220-hikey-r2 x15: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_verifier * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cgroup_test_freezer * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_mmio_warning_test * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/netfilter_conntrack_icmp_related.sh * kselftest/netfilter_nft_nat.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_so_txtime.sh * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh qemu_arm: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_sock_addr.sh * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcp_check_syncookie.sh * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_verifier * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_mmio_warning_test * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_rule_tests.sh * kselftest/net_fib_tests.sh * kselftest/netfilter_conntrack_icmp_related.sh * kselftest/netfilter_nft_nat.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_reuseport_bpf_numa * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/timers_rtcpie * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh qemu_i386: * kselftest/binderfs_binderfs_test * kselftest/bpf_get_cgroup_id_user * kselftest/bpf_test_btf_dump * kselftest/bpf_test_flow_dissector.sh * kselftest/bpf_test_libbpf.sh * kselftest/bpf_test_lwt_ip_encap.sh * kselftest/bpf_test_lwt_seg6local.sh * kselftest/bpf_test_maps * kselftest/bpf_test_netcnt * kselftest/bpf_test_progs * kselftest/bpf_test_select_reuseport * kselftest/bpf_test_socket_cookie * kselftest/bpf_test_sock_fields * kselftest/bpf_test_sockmap * kselftest/bpf_test_sockopt_inherit * kselftest/bpf_test_sockopt_sk * kselftest/bpf_test_sysctl * kselftest/bpf_test_tc_edt.sh * kselftest/bpf_test_tcpbpf_user * kselftest/bpf_test_tcpnotify_user * kselftest/bpf_test_tcp_rtt * kselftest/bpf_test_tc_tunnel.sh * kselftest/bpf_test_tunnel.sh * kselftest/bpf_test_xdping.sh * kselftest/bpf_xdping * kselftest/cpufreq_main.sh * kselftest/firmware_fw_run_tests.sh * kselftest/ftrace_ftracetest * kselftest/kvm_clear_dirty_log_test * kselftest/kvm_cr4_cpuid_sync_test * kselftest/kvm_dirty_log_test * kselftest/kvm_evmcs_test * kselftest/kvm_hyperv_cpuid * kselftest/kvm_kvm_create_max_vcpus * kselftest/kvm_mmio_warning_test * kselftest/kvm_platform_info_test * kselftest/kvm_set_sregs_test * kselftest/kvm_smm_test * kselftest/kvm_state_test * kselftest/kvm_sync_regs_test * kselftest/kvm_vmx_close_while_nested_test * kselftest/kvm_vmx_set_nested_state_test * kselftest/kvm_vmx_tsc_adjust_test * kselftest/lib_bitmap.sh * kselftest/lib_prime_numbers.sh * kselftest/lib_printf.sh * kselftest/lib_strscpy.sh * kselftest/net_fib-onlink-tests.sh * kselftest/net_fib_tests.sh * kselftest/netfilter_conntrack_icmp_related.sh * kselftest/netfilter_nft_nat.sh * kselftest/net_ip_defrag.sh * kselftest/net_l2tp.sh * kselftest/net_pmtu.sh * kselftest/net_psock_snd.sh * kselftest/net_run_netsocktests * kselftest/net_tcp_fastopen_backup_key.sh * kselftest/net_test_vxlan_under_vrf.sh * kselftest/net_xfrm_policy.sh * kselftest/pidfd_pidfd_open_test * kselftest/pidfd_pidfd_poll_test * kselftest/proc_proc-self-map-files-002 * kselftest/proc_proc-self-syscall * kselftest/pstore_pstore_tests * kselftest/seccomp_seccomp_bpf * kselftest/size_get_size * kselftest/timestamping_txtimestamp.sh * kselftest/tpm2_test_smoke.sh * kselftest/tpm2_test_space.sh * kselftest/x86_sigreturn_32 Skips ------------------------------------------------------------------------ No skips -- Linaro LKFT https://lkft.linaro.org

6 years

1
0
0 0

Regression in 5.3-rc1 and later

by Chris Clayton

Hi everyone, Firstly, apologies to anyone on the long cc list that turns out not to be particularly interested in the following, but you were all marked as cc'd in the commit message below. I've found a problem that isn't present in 5.2 series or 4.19 series kernels, and seems to have arrived in 5.3-rc1. The problem is that if I suspend (to ram) my laptop, on resume 14 minutes or more after suspending, I have no networking functionality. If I resume the laptop after 13 minutes or less, networking works fine. I haven't tried to get finer grained timings between 13 and 14 minutes, but can do if it would help. ifconfig shows that wlan0 is still up and still has its assigned ip address but, for instance, a ping of any other device on my network, fails as does pinging, say, kernel.org. I've tried "downing" the network with (/sbin/ifdown) and unloading the iwlmvm module and then reloading the module and "upping" (/sbin/ifup) the network, but my network is still unusable. I should add that the problem also manifests if I hibernate the laptop, although my testing of this has been minimal. I can do more if required. As I say, the problem first appears in 5.3-rc1, so I've bisected between 5.2.0 and 5.3-rc1 and that concluded with: [chris:~/kernel/linux]$ git bisect good 7ac8707479886c75f353bfb6a8273f423cfccb23 is the first bad commit commit 7ac8707479886c75f353bfb6a8273f423cfccb23 Author: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Date: Fri Jun 21 10:52:49 2019 +0100 x86/vdso: Switch to generic vDSO implementation The x86 vDSO library requires some adaptations to take advantage of the newly introduced generic vDSO library. Introduce the following changes: - Modification of vdso.c to be compliant with the common vdso datapage - Use of lib/vdso for gettimeofday [ tglx: Massaged changelog and cleaned up the function signature formatting ] Signed-off-by: Vincenzo Frascino <vincenzo.frascino(a)arm.com> Signed-off-by: Thomas Gleixner <tglx(a)linutronix.de> Cc: linux-arch(a)vger.kernel.org Cc: linux-arm-kernel(a)lists.infradead.org Cc: linux-mips(a)vger.kernel.org Cc: linux-kselftest(a)vger.kernel.org Cc: Catalin Marinas <catalin.marinas(a)arm.com> Cc: Will Deacon <will.deacon(a)arm.com> Cc: Arnd Bergmann <arnd(a)arndb.de> Cc: Russell King <linux(a)armlinux.org.uk> Cc: Ralf Baechle <ralf(a)linux-mips.org> Cc: Paul Burton <paul.burton(a)mips.com> Cc: Daniel Lezcano <daniel.lezcano(a)linaro.org> Cc: Mark Salyzyn <salyzyn(a)android.com> Cc: Peter Collingbourne <pcc(a)google.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: Dmitry Safonov <0x7f454c46(a)gmail.com> Cc: Rasmus Villemoes <linux(a)rasmusvillemoes.dk> Cc: Huw Davies <huw(a)codeweavers.com> Cc: Shijith Thotton <sthotton(a)marvell.com> Cc: Andre Przywara <andre.przywara(a)arm.com> Link: https://lkml.kernel.org/r/20190621095252.32307-23-vincenzo.frascino@arm.com arch/x86/Kconfig | 3 + arch/x86/entry/vdso/Makefile | 9 ++ arch/x86/entry/vdso/vclock_gettime.c | 245 ++++--------------------------- arch/x86/entry/vdso/vdsox32.lds.S | 1 + arch/x86/entry/vsyscall/Makefile | 2 - arch/x86/entry/vsyscall/vsyscall_gtod.c | 83 ----------- arch/x86/include/asm/pvclock.h | 2 +- arch/x86/include/asm/vdso/gettimeofday.h | 191 ++++++++++++++++++++++++ arch/x86/include/asm/vdso/vsyscall.h | 44 ++++++ arch/x86/include/asm/vgtod.h | 75 +--------- arch/x86/include/asm/vvar.h | 7 +- arch/x86/kernel/pvclock.c | 1 + 12 files changed, 284 insertions(+), 379 deletions(-) delete mode 100644 arch/x86/entry/vsyscall/vsyscall_gtod.c create mode 100644 arch/x86/include/asm/vdso/gettimeofday.h create mode 100644 arch/x86/include/asm/vdso/vsyscall.h To confirm my bisection was correct, I did a git checkout of 7ac8707479886c75f353bfb6a8273f423cfccb2. As expected, the kernel exhibited the problem I've described. However, a kernel built at the immediately preceding (parent?) commit (bfe801ebe84f42b4666d3f0adde90f504d56e35b) has a working network after a (>= 14minute) suspend/resume cycle. As the module name implies, I'm using wireless networking. The hardware is detected as "Intel(R) Wireless-AC 9260 160MHz, REV=0x324" by iwlwifi. I'm more than happy to provide additional diagnostics (but may need a little hand-holding) and to apply diagnostic or fix patches, but please cc me on any reply as I'm not subscribed to any of the kernel-related mailing lists. Chris

6 years

5
7
0 0

[PATCH v2 0/2] firmware: selftest for request_firmware_into_buf

by Scott Branden

This patch series adds kernel selftest of request_firmware_into_buf. The API was added to the kernel previously untested. Changes from v1: - Dropped demonstration patch for a race condition discovered while testing request_firmare_into_buf. The new test exposes a kernel opps with the firmware fallback mechanism that may be fixed separate from these tests. - minor whitespace formatting in patch - added Ack's - added "s" in commit message (changed selftest: to selftests:) Scott Branden (2): test_firmware: add support for request_firmware_into_buf selftests: firmware: Add request_firmware_into_buf tests lib/test_firmware.c | 50 +++++++++++++++- .../selftests/firmware/fw_filesystem.sh | 57 ++++++++++++++++++- tools/testing/selftests/firmware/fw_lib.sh | 11 ++++ 3 files changed, 114 insertions(+), 4 deletions(-) -- 2.17.1

6 years

1
2
0 0

[PATCH] selftests: net: add missing NFT_FWD_NETDEV to config

by Anders Roxell

When running xfrm_policy.sh we see the following # sysctl cannot stat /proc/sys/net/ipv4/conf/eth1/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv4/conf/eth1/forwarding # # sysctl cannot stat /proc/sys/net/ipv4/conf/veth0/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv4/conf/veth0/forwarding # # sysctl cannot stat /proc/sys/net/ipv4/conf/eth1/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv4/conf/eth1/forwarding # # sysctl cannot stat /proc/sys/net/ipv4/conf/veth0/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv4/conf/veth0/forwarding # # sysctl cannot stat /proc/sys/net/ipv6/conf/eth1/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv6/conf/eth1/forwarding # # sysctl cannot stat /proc/sys/net/ipv6/conf/veth0/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv6/conf/veth0/forwarding # # sysctl cannot stat /proc/sys/net/ipv6/conf/eth1/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv6/conf/eth1/forwarding # # sysctl cannot stat /proc/sys/net/ipv6/conf/veth0/forwarding No such file or directory cannot: stat_/proc/sys/net/ipv6/conf/veth0/forwarding # # modprobe FATAL Module ip_tables not found in directory /lib/modules/5.3.0-rc5-next-20190820+ FATAL: Module_ip_tables # # iptables v1.6.2 can't initialize iptables table `filter' Table does not exist (do you need to insmod?) v1.6.2: can't_initialize # Rework to enable CONFIG_NF_TABLES_NETDEV and CONFIG_NFT_FWD_NETDEV. Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org> --- tools/testing/selftests/net/config | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/net/config b/tools/testing/selftests/net/config index b8503a8119b0..e30b0ae5d474 100644 --- a/tools/testing/selftests/net/config +++ b/tools/testing/selftests/net/config @@ -29,3 +29,5 @@ CONFIG_NET_SCH_FQ=m CONFIG_NET_SCH_ETF=m CONFIG_TEST_BLACKHOLE_DEV=m CONFIG_KALLSYMS=y +CONFIG_NF_TABLES_NETDEV=y +CONFIG_NFT_FWD_NETDEV=m -- 2.20.1

6 years

2
1
0 0

[PATCH] selftests: bpf: install files test_xdp_vlan.sh

by Anders Roxell

When ./test_xdp_vlan_mode_generic.sh runs it complains that it can't find file test_xdp_vlan.sh. # selftests: bpf: test_xdp_vlan_mode_generic.sh # ./test_xdp_vlan_mode_generic.sh: line 9: ./test_xdp_vlan.sh: No such file or directory Rework so that test_xdp_vlan.sh gets installed, added to the variable TEST_PROGS_EXTENDED. Fixes: d35661fcf95d ("selftests/bpf: add wrapper scripts for test_xdp_vlan.sh") Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org> --- tools/testing/selftests/bpf/Makefile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile index 1faad0c3c3c9..d7968e20463c 100644 --- a/tools/testing/selftests/bpf/Makefile +++ b/tools/testing/selftests/bpf/Makefile @@ -68,7 +68,8 @@ TEST_PROGS := test_kmod.sh \ TEST_PROGS_EXTENDED := with_addr.sh \ with_tunnels.sh \ tcp_client.py \ - tcp_server.py + tcp_server.py \ + test_xdp_vlan.sh # Compile but not part of 'make run_tests' TEST_GEN_PROGS_EXTENDED = test_libbpf_open test_sock_addr test_skb_cgroup_id_user \ -- 2.20.1

6 years

3
2
0 0

[PATCH] selftests: bpf: add config fragment BPF_JIT

by Anders Roxell

When running test_kmod.sh the following shows up # sysctl cannot stat /proc/sys/net/core/bpf_jit_enable No such file or directory cannot: stat_/proc/sys/net/core/bpf_jit_enable # # sysctl cannot stat /proc/sys/net/core/bpf_jit_harden No such file or directory cannot: stat_/proc/sys/net/core/bpf_jit_harden # Rework to enable CONFIG_BPF_JIT to solve "No such file or directory" Signed-off-by: Anders Roxell <anders.roxell(a)linaro.org> --- tools/testing/selftests/bpf/config | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/testing/selftests/bpf/config b/tools/testing/selftests/bpf/config index f7a0744db31e..5dc109f4c097 100644 --- a/tools/testing/selftests/bpf/config +++ b/tools/testing/selftests/bpf/config @@ -34,3 +34,4 @@ CONFIG_NET_MPLS_GSO=m CONFIG_MPLS_ROUTING=m CONFIG_MPLS_IPTUNNEL=m CONFIG_IPV6_SIT=m +CONFIG_BPF_JIT=y -- 2.20.1

6 years

2
1
0 0

[PATCH v13 00/18] kunit: introduce KUnit, the Linux kernel unit testing framework

by Brendan Higgins

## TL;DR This revision addresses comments from Stephen and Bjorn Helgaas. Most changes are pretty minor stuff that doesn't affect the API in anyway. One significant change, however, is that I added support for freeing kunit_resource managed resources before the test case is finished via kunit_resource_destroy(). Additionally, Bjorn pointed out that I broke KUnit on certain configurations (like the default one for x86, whoops). Based on Stephen's feedback on the previous change, I think we are pretty close. I am not expecting any significant changes from here on out. ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM (however, KUnit still allows you to run tests on test machines or in VMs if you want[1]) and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in about a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ### What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ### Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ### More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here[2]. Additionally for convenience, I have applied these patches to a branch[3]. The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/rfc/v5.3/v13 branch. ## Changes Since Last Version - Added support for freeing kunit_resources (KUnit managed resources) via kunit_resource_destroy() as suggested by Stephen. - Promoted WARN() after __noreturn function to BUG() in "[PATCH v13 09/18] kunit: test: add support for test abort" as suggested by Stephen. - Dropped concept of death test since I am not actually using it yet as pointed out by Stephen. - Replaced usage of warn_slowpath_fmt with WARN in kunit_do_assertion since warn_slowpath_fmt is not available on some build configurations, as pointed out by Bjorn. - Lots of other minor changes suggested by Stephen. [1] https://google.github.io/kunit-docs/third_party/kernel/docs/usage.html#kuni… [2] https://google.github.io/kunit-docs/third_party/kernel/docs/ [3] https://kunit.googlesource.com/linux/+/kunit/rfc/v5.3/v13 -- 2.23.0.rc1.153.gdeed80330f-goog

6 years

3
30
0 0

general protection fault in tls_setsockopt

by syzbot

Hello, syzbot found the following crash on: HEAD commit: a131c2bf Merge tag 'acpi-5.3-rc1-2' of git://git.kernel.or.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1603e9c0600000 kernel config: https://syzkaller.appspot.com/x/.config?x=8bff73c5ba9e876 dashboard link: https://syzkaller.appspot.com/bug?extid=23d9570edec63669d890 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13560870600000 The bug was bisected to: commit 7c85c448e7d74c4ddd759440a2141eab663567cf Author: Prashant Bhole <bhole_prashant_q7(a)lab.ntt.co.jp> Date: Tue Oct 9 01:04:54 2018 +0000 selftests/bpf: test_verifier, check bpf_map_lookup_elem access in bpf prog bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17000114600000 final crash: https://syzkaller.appspot.com/x/report.txt?x=14800114600000 console output: https://syzkaller.appspot.com/x/log.txt?x=10800114600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+23d9570edec63669d890(a)syzkaller.appspotmail.com Fixes: 7c85c448e7d7 ("selftests/bpf: test_verifier, check bpf_map_lookup_elem access in bpf prog") kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9098 Comm: syz-executor.2 Not tainted 5.2.0+ #65 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tls_setsockopt+0x87/0x8c0 net/tls/tls_main.c:592 Code: 80 3c 02 00 0f 85 a5 07 00 00 49 8b 84 24 b0 06 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 88 00 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 85 07 00 00 41 89 d8 4c 89 f1 44 89 ea 44 89 fe RSP: 0018:ffff88809b2e7d30 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000011 RDX: dffffc0000000000 RSI: ffffffff86186a84 RDI: 0000000000000088 RBP: ffff88809b2e7d80 R08: ffff888098896480 R09: ffff888098896d08 R10: ffffed1015d06c83 R11: ffff8880ae83641b R12: ffff888099d86d00 R13: 000000000000001f R14: 0000000020000340 R15: 0000000000000006 FS: 00007f29b1f6b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffb5492d518 CR3: 00000000a49ea000 CR4: 00000000001406f0 Call Trace: sock_common_setsockopt+0x94/0xd0 net/core/sock.c:3130 __sys_setsockopt+0x253/0x4b0 net/socket.c:2080 __do_sys_setsockopt net/socket.c:2096 [inline] __se_sys_setsockopt net/socket.c:2093 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:2093 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459819 Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f29b1f6ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459819 RDX: 000000000000001f RSI: 0000000000000006 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000340 R11: 0000000000000246 R12: 00007f29b1f6b6d4 R13: 00000000004c7cb9 R14: 00000000004dd878 R15: 00000000ffffffff Modules linked in: ---[ end trace 1e30f09ab6b57d8c ]--- RIP: 0010:tls_setsockopt+0x87/0x8c0 net/tls/tls_main.c:592 Code: 80 3c 02 00 0f 85 a5 07 00 00 49 8b 84 24 b0 06 00 00 48 ba 00 00 00 00 00 fc ff df 48 8d b8 88 00 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 85 07 00 00 41 89 d8 4c 89 f1 44 89 ea 44 89 fe RSP: 0018:ffff88809b2e7d30 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 0000000000000011 RDX: dffffc0000000000 RSI: ffffffff86186a84 RDI: 0000000000000088 RBP: ffff88809b2e7d80 R08: ffff888098896480 R09: ffff888098896d08 R10: ffffed1015d06c83 R11: ffff8880ae83641b R12: ffff888099d86d00 R13: 000000000000001f R14: 0000000020000340 R15: 0000000000000006 FS: 00007f29b1f6b700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000007126b4 CR3: 00000000a49ea000 CR4: 00000000001406f0 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller(a)googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches

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