diff options
| author | Leon Hwang <leon.hwang@linux.dev> | 2026-01-31 22:49:48 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-01-31 13:51:04 -0800 |
| commit | 8798902f2b8bcae6f90229a1a1496b48ddda2972 (patch) | |
| tree | 6e0352a44fec38c2d0f430dd9ab3ddbb7aab9ddf /kernel | |
| parent | f0b5b3d6b56f8717e255406366d81bbcd3631660 (diff) | |
bpf: Add bpf_jit_supports_fsession()
The added fsession does not prevent running on those architectures, that
haven't added fsession support.
For example, try to run fsession tests on arm64:
test_fsession_basic:PASS:fsession_test__open_and_load 0 nsec
test_fsession_basic:PASS:fsession_attach 0 nsec
check_result:FAIL:test_run_opts err unexpected error: -14 (errno 14)
In order to prevent such errors, add bpf_jit_supports_fsession() to guard
those architectures.
Fixes: 2d419c44658f ("bpf: add fsession support")
Acked-by: Puranjay Mohan <puranjay@kernel.org>
Tested-by: Puranjay Mohan <puranjay@kernel.org>
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20260131144950.16294-2-leon.hwang@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/core.c | 5 | ||||
| -rw-r--r-- | kernel/bpf/verifier.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 5ebece600aeb..dc906dfdff94 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -3144,6 +3144,11 @@ bool __weak bpf_jit_supports_insn(struct bpf_insn *insn, bool in_arena) return false; } +bool __weak bpf_jit_supports_fsession(void) +{ + return false; +} + u64 __weak bpf_arch_uaddress_limit(void) { #if defined(CONFIG_64BIT) && defined(CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE) diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 256cc5c1a7df..6b62b6d57175 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -24828,6 +24828,11 @@ int bpf_check_attach_target(struct bpf_verifier_log *log, case BPF_TRACE_FENTRY: case BPF_TRACE_FEXIT: case BPF_TRACE_FSESSION: + if (prog->expected_attach_type == BPF_TRACE_FSESSION && + !bpf_jit_supports_fsession()) { + bpf_log(log, "JIT does not support fsession\n"); + return -EOPNOTSUPP; + } if (!btf_type_is_func(t)) { bpf_log(log, "attach_btf_id %u is not a function\n", btf_id); |