From: "Alexis Lothoré (eBPF Foundation)" <alexis.lothore@bootlin•com>
To: Alexei Starovoitov <ast@kernel•org>,
Daniel Borkmann <daniel@iogearbox•net>,
Andrii Nakryiko <andrii@kernel•org>,
Martin KaFai Lau <martin.lau@linux•dev>,
Eduard Zingerman <eddyz87@gmail•com>,
Kumar Kartikeya Dwivedi <memxor@gmail•com>,
Song Liu <song@kernel•org>,
Yonghong Song <yonghong.song@linux•dev>,
Jiri Olsa <jolsa@kernel•org>,
John Fastabend <john.fastabend@gmail•com>,
Thomas Gleixner <tglx@kernel•org>,
Ingo Molnar <mingo@redhat•com>, Borislav Petkov <bp@alien8•de>,
Dave Hansen <dave.hansen@linux•intel.com>,
x86@kernel•org, "H. Peter Anvin" <hpa@zytor•com>,
Shuah Khan <shuah@kernel•org>,
Maxime Coquelin <mcoquelin.stm32@gmail•com>,
Alexandre Torgue <alexandre.torgue@foss•st.com>,
Ihor Solodrai <ihor.solodrai@linux•dev>
Cc: ebpf@linuxfoundation•org,
"Bastien Curutchet" <bastien.curutchet@bootlin•com>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin•com>,
bpf@vger•kernel.org, linux-kernel@vger•kernel.org,
linux-kselftest@vger•kernel.org,
linux-stm32@st-md-mailman•stormreply.com,
linux-arm-kernel@lists•infradead.org,
"Alexis Lothoré (eBPF Foundation)" <alexis.lothore@bootlin•com>
Subject: [PATCH bpf-next v2 7/8] selftests/bpf: add helper to check whether eBPF KASAN is active
Date: Thu, 04 Jun 2026 22:22:05 +0200 [thread overview]
Message-ID: <20260604-kasan-v2-7-c066e627fda8@bootlin.com> (raw)
In-Reply-To: <20260604-kasan-v2-0-c066e627fda8@bootlin.com>
Add a simple helper checking whether JIT compiler is able to insert
KASAN checks in programs. This will allow to conditionally run
selftests for KASAN checks in JITed programs.
Signed-off-by: Alexis Lothoré (eBPF Foundation) <alexis.lothore@bootlin•com>
---
Changes in v2:
- fix condition
---
tools/testing/selftests/bpf/unpriv_helpers.c | 5 +++++
tools/testing/selftests/bpf/unpriv_helpers.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/tools/testing/selftests/bpf/unpriv_helpers.c b/tools/testing/selftests/bpf/unpriv_helpers.c
index f997d7ec8fd0..11201b65a3d4 100644
--- a/tools/testing/selftests/bpf/unpriv_helpers.c
+++ b/tools/testing/selftests/bpf/unpriv_helpers.c
@@ -142,3 +142,8 @@ bool get_unpriv_disabled(void)
}
return mitigations_off;
}
+
+bool get_kasan_jit_enabled(void)
+{
+ return config_contains("CONFIG_BPF_JIT_KASAN=y") == 1;
+}
diff --git a/tools/testing/selftests/bpf/unpriv_helpers.h b/tools/testing/selftests/bpf/unpriv_helpers.h
index 151f67329665..bc5f4c953c9d 100644
--- a/tools/testing/selftests/bpf/unpriv_helpers.h
+++ b/tools/testing/selftests/bpf/unpriv_helpers.h
@@ -5,3 +5,4 @@
#define UNPRIV_SYSCTL "kernel/unprivileged_bpf_disabled"
bool get_unpriv_disabled(void);
+bool get_kasan_jit_enabled(void);
--
2.54.0
next prev parent reply other threads:[~2026-06-04 20:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-04 20:21 [PATCH bpf-next v2 0/8] bpf: add support for KASAN checks in JITed programs Alexis Lothoré (eBPF Foundation)
2026-06-04 20:21 ` [PATCH bpf-next v2 1/8] bpf: mark instructions accessing program stack Alexis Lothoré (eBPF Foundation)
2026-06-04 21:13 ` bot+bpf-ci
2026-06-04 20:22 ` [PATCH bpf-next v2 2/8] bpf: add BPF_JIT_KASAN for KASAN instrumentation of JITed programs Alexis Lothoré (eBPF Foundation)
2026-06-04 21:13 ` bot+bpf-ci
2026-06-04 20:22 ` [PATCH bpf-next v2 3/8] bpf, x86: add helper to emit kasan checks in x86 " Alexis Lothoré (eBPF Foundation)
2026-06-04 20:22 ` [PATCH bpf-next v2 4/8] bpf, x86: refactor BPF_ST management in do_jit Alexis Lothoré (eBPF Foundation)
2026-06-04 21:13 ` bot+bpf-ci
2026-06-04 20:22 ` [PATCH bpf-next v2 5/8] bpf, x86: emit KASAN checks into x86 JITed programs Alexis Lothoré (eBPF Foundation)
2026-06-04 20:22 ` [PATCH bpf-next v2 6/8] bpf, x86: enable KASAN for JITed programs on x86 Alexis Lothoré (eBPF Foundation)
2026-06-04 20:22 ` Alexis Lothoré (eBPF Foundation) [this message]
2026-06-04 20:22 ` [PATCH bpf-next v2 8/8] selftests/bpf: add tests to validate KASAN on JIT programs Alexis Lothoré (eBPF Foundation)
2026-06-04 21:45 ` bot+bpf-ci
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