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Thu, 19 Feb 2026 16:36:16 -0800 (PST) Message-ID: Subject: Re: [PATCH bpf v2 15/15] selftests/bpf: Don't override SIGSEGV handler with ASAN From: Eduard Zingerman To: Mykyta Yatsenko , Ihor Solodrai , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Jiri Olsa , Mykyta Yatsenko , Alexis =?ISO-8859-1?Q?Lothor=E9?= Cc: Amery Hung , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com Date: Thu, 19 Feb 2026 16:36:13 -0800 In-Reply-To: References: <20260218003041.1156774-1-ihor.solodrai@linux.dev> <20260218003041.1156774-16-ihor.solodrai@linux.dev> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.1 (3.58.1-1.fc43) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Wed, 2026-02-18 at 15:12 +0000, Mykyta Yatsenko wrote: > On 2/18/26 00:30, Ihor Solodrai wrote: > > test_progs has custom SIGSEGV handler, which interferes with the > > address sanitizer [1]. Add an #ifndef to avoid this. > >=20 > > [1] https://lore.kernel.org/bpf/73d832948b01dbc0ebc60d85574bdf8537f3a81= 0.camel@gmail.com/ > >=20 > > Signed-off-by: Ihor Solodrai > > --- > > =C2=A0 tools/testing/selftests/bpf/test_progs.c | 8 +++++--- > > =C2=A0 1 file changed, 5 insertions(+), 3 deletions(-) > >=20 > > diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/s= elftests/bpf/test_progs.c > > index 02a85dda30e6..b533cede933d 100644 > > --- a/tools/testing/selftests/bpf/test_progs.c > > +++ b/tools/testing/selftests/bpf/test_progs.c > > @@ -1944,13 +1944,15 @@ int main(int argc, char **argv) > > =C2=A0=C2=A0 .parser =3D parse_arg, > > =C2=A0=C2=A0 .doc =3D argp_program_doc, > > =C2=A0=C2=A0 }; > > + int err, i; > > + > > +#ifndef __SANITIZE_ADDRESS__ > > =C2=A0=C2=A0 struct sigaction sigact =3D { > > =C2=A0=C2=A0 .sa_handler =3D crash_handler, > > =C2=A0=C2=A0 .sa_flags =3D SA_RESETHAND, > > - }; > > - int err, i; > > - > > + }; > > =C2=A0=C2=A0 sigaction(SIGSEGV, &sigact, NULL); > > +#endif > > =C2=A0=20 > > =C2=A0=C2=A0 env.stdout_saved =3D stdout; > > =C2=A0=C2=A0 env.stderr_saved =3D stderr; > I think this is reasonable for the use case. We may try dumping logs > in |__asan_on_error(), if that proves useful. > Acked-by: Mykyta Yatsenko | Agree with Mykyta, crash_handler() can be split in two parts and __asan_on_error() can be defined, calling the part doing dump_test_log().