Puranjay Mohan
86f2225065
selftests/bpf: Add tests for arena fault reporting
...
Add selftests for testing the reporting of arena page faults through BPF
streams. Two new bpf programs are added that read and write to an
unmapped arena address and the fault reporting is verified in the
userspace through streams.
The added bpf programs need to access the user_vm_start in struct
bpf_arena, this is done by casting &arena to struct bpf_arena *, but
barrier_var() is used on this ptr before accessing ptr->user_vm_start;
to stop GCC from issuing an out-of-bound access due to the cast from
smaller map struct to larger "struct bpf_arena"
Signed-off-by: Puranjay Mohan <puranjay@kernel.org >
Acked-by: Eduard Zingerman <eddyz87@gmail.com >
Link: https://lore.kernel.org/r/20250911145808.58042-7-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2025-09-11 13:00:44 -07:00
Puranjay Mohan
edd03fcd76
selftests: bpf: use __stderr in stream error tests
...
Start using __stderr directly in the bpf programs to test the reporting
of may_goto timeout detection and spin_lock dead lock detection.
Signed-off-by: Puranjay Mohan <puranjay@kernel.org >
Acked-by: Eduard Zingerman <eddyz87@gmail.com >
Link: https://lore.kernel.org/r/20250911145808.58042-6-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2025-09-11 13:00:44 -07:00
Puranjay Mohan
22b22bf9ee
selftests/bpf: Enable timed may_goto tests for arm64
...
As arm64 JIT now supports timed may_goto instruction, make sure all
relevant tests run on this architecture. Some tests were enabled and
other required modifications to work properly on arm64.
$ ./test_progs -a "stream*","*may_goto*",verifier_bpf_fastcall
#404 stream_errors:OK
[...]
#406/2 stream_success/stream_cond_break:OK
[...]
#494/23 verifier_bpf_fastcall/may_goto_interaction_x86_64:SKIP
#494/24 verifier_bpf_fastcall/may_goto_interaction_arm64:OK
[...]
#539/1 verifier_may_goto_1/may_goto 0:OK
#539/2 verifier_may_goto_1/batch 2 of may_goto 0:OK
#539/3 verifier_may_goto_1/may_goto batch with offsets 2/1/0:OK
#539/4 verifier_may_goto_1/may_goto batch with offsets 2/0:OK
#539 verifier_may_goto_1:OK
#540/1 verifier_may_goto_2/C code with may_goto 0:OK
#540 verifier_may_goto_2:OK
Summary: 7/16 PASSED, 25 SKIPPED, 0 FAILED
Signed-off-by: Puranjay Mohan <puranjay@kernel.org >
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com >
Acked-by: Xu Kuohai <xukuohai@huawei.com >
Link: https://lore.kernel.org/r/20250827113245.52629-3-puranjay@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2025-08-27 17:16:22 -07:00
Ilya Leoshkevich
7197dbcba2
selftests/bpf: Enable timed may_goto verifier tests on s390x
...
Now that the timed may_goto implementation is available on s390x,
enable the respective verifier tests.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com >
Link: https://lore.kernel.org/r/20250821113339.292434-5-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2025-08-26 16:51:52 -07:00
Kumar Kartikeya Dwivedi
5697683e13
selftests/bpf: Add tests for prog streams
...
Add selftests to stress test the various facets of the stream API,
memory allocation pattern, and ensuring dumping support is tested and
functional.
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com >
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com >
Link: https://lore.kernel.org/r/20250703204818.925464-13-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
2025-07-03 19:30:07 -07:00
