linux-stable.git/tools/testing/selftests/bpf/prog_tests/recursive_attach.c, branch linux-rolling-stable Linux kernel stable tree selftests/bpf: Stress test attaching a BPF prog to another BPF prog 2025-07-17T01:32:31+00:00 Ilya Leoshkevich iii@linux.ibm.com 2025-07-16T19:35:07+00:00 d459dbbbfa323165849451edb9690a933c210bac Add a test that invokes a BPF prog in a loop, while concurrently attaching and detaching another BPF prog to and from it. This helps identifying race conditions in bpf_arch_text_poke(). Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Link: https://lore.kernel.org/r/20250716194524.48109-3-iii@linux.ibm.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> 
Add a test that invokes a BPF prog in a loop, while concurrently
attaching and detaching another BPF prog to and from it. This helps
identifying race conditions in bpf_arch_text_poke().

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20250716194524.48109-3-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
selftests/bpf: Test re-attachment fix for bpf_tracing_prog_attach 2024-01-05T04:40:49+00:00 Dmitrii Dolgov 9erthalion6@gmail.com 2024-01-03T19:05:47+00:00 e02feb3f1f47509ec1e07b604bfbeff8c3b4e639 Add a test case to verify the fix for "prog->aux->dst_trampoline and tgt_prog is NULL" branch in bpf_tracing_prog_attach. The sequence of events: 1. load rawtp program 2. load fentry program with rawtp as target_fd 3. create tracing link for fentry program with target_fd = 0 4. repeat 3 Acked-by: Jiri Olsa <olsajiri@gmail.com> Acked-by: Song Liu <song@kernel.org> Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20240103190559.14750-5-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> 
Add a test case to verify the fix for "prog->aux->dst_trampoline and
tgt_prog is NULL" branch in bpf_tracing_prog_attach. The sequence of
events:

1. load rawtp program
2. load fentry program with rawtp as target_fd
3. create tracing link for fentry program with target_fd = 0
4. repeat 3

Acked-by: Jiri Olsa <olsajiri@gmail.com>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com>
Link: https://lore.kernel.org/r/20240103190559.14750-5-9erthalion6@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
selftests/bpf: Add test for recursive attachment of tracing progs 2024-01-05T04:40:14+00:00 Dmitrii Dolgov 9erthalion6@gmail.com 2024-01-03T19:05:45+00:00 5c5371e069e1ffc204dda8b20c609b170b823165 Verify the fact that only one fentry prog could be attached to another fentry, building up an attachment chain of limited size. Use existing bpf_testmod as a start of the chain. Acked-by: Jiri Olsa <olsajiri@gmail.com> Acked-by: Song Liu <song@kernel.org> Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com> Link: https://lore.kernel.org/r/20240103190559.14750-3-9erthalion6@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> 
Verify the fact that only one fentry prog could be attached to another
fentry, building up an attachment chain of limited size. Use existing
bpf_testmod as a start of the chain.

Acked-by: Jiri Olsa <olsajiri@gmail.com>
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: Dmitrii Dolgov <9erthalion6@gmail.com>
Link: https://lore.kernel.org/r/20240103190559.14750-3-9erthalion6@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>