On Sat, Jul 27, 2019 at 12:02 PM Andrii Nakryiko <andriin@xxxxxx> wrote: > > This patch set makes a number of changes to test_progs selftest, which is > a collection of many other tests (and sometimes sub-tests as well), to provide > better testing experience and allow to start convering many individual test > programs under selftests/bpf into a single and convenient test runner. I really like the patches, but something isn't right: #16 raw_tp_writable_reject_nbd_invalid:OK #17 raw_tp_writable_test_run:OK #18 reference_tracking:OK [ 87.715996] test_progs[2200]: segfault at 2f ip 00007f56aeea347b sp 00007ffce9720980 error 4 in libc-2.23.so[7f56aee5b000+198000] [ 87.717316] Code: ff ff 44 89 8d 30 fb ff ff e8 01 74 fd ff 44 8b 8d 30 fb ff ff 4c 8b 85 28 fb ff ff e9 fd eb ff ff 31 c0 48 83 c9 ff 4c 89 df <f2> ae c7 85 28 fb ff ff 00 00 00 00 48 89 c8 48 f7 d0 4c 8f [ 87.719493] audit: type=1701 audit(1564276195.971:5): auid=0 uid=0 gid=0 ses=1 subj=kernel pid=2200 comm="test_progs" exe="/data/users/ast/net-next/tools/testing/selftests/bpf/test_progs" sig=11 res=1 Segmentation fault (core dumped) Under gdb fault is different: #23 stacktrace_build_id:OK Detaching after fork from child process 2276. Detaching after fork from child process 2278. [ 149.013116] perf: interrupt took too long (6799 > 6713), lowering kernel.perf_event_max_sample_rate to 29000 [ 149.014634] perf: interrupt took too long (8511 > 8498), lowering kernel.perf_event_max_sample_rate to 23000 [ 149.017038] perf: interrupt took too long (10649 > 10638), lowering kernel.perf_event_max_sample_rate to 18000 [ 149.021901] perf: interrupt took too long (13322 > 13311), lowering kernel.perf_event_max_sample_rate to 15000 [ 149.042946] perf: interrupt took too long (16660 > 16652), lowering kernel.perf_event_max_sample_rate to 12000 Detaching after fork from child process 2279. #24 stacktrace_build_id_nmi:OK #25 stacktrace_map:OK #26 stacktrace_map_raw_tp:OK Program received signal SIGSEGV, Segmentation fault. 0x00007ffff723f47b in vfprintf () from /usr/lib/libc.so.6 (gdb) bt #0 0x00007ffff723f47b in vfprintf () from /usr/lib/libc.so.6 #1 0x00007ffff72655a9 in vsnprintf () from /usr/lib/libc.so.6 #2 0x0000000000403100 in test__vprintf (fmt=0x426754 "%s:PASS:%s %d nsec\n", args=0x7fffffffe878) at test_progs.c:114 #3 0x000000000040325c in test__printf (fmt=fmt@entry=0x426754 "%s:PASS:%s %d nsec\n") at test_progs.c:147 #4 0x000000000042222d in test_task_fd_query_rawtp () at prog_tests/task_fd_query_rawtp.c:19 #5 0x0000000000402c76 in main (argc=<optimized out>, argv=<optimized out>) at test_progs.c:501 (gdb) info threads Id Target Id Frame * 1 Thread 0x7ffff7fea700 (LWP 2245) "test_progs" 0x00007ffff723f47b in vfprintf () from /usr/lib/libc.so.6
