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Wed, 11 Mar 2026 08:57:51 -0700 (PDT) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Wed, 11 Mar 2026 11:57:50 -0400 Message-Id: Cc: , , Subject: Re: [PATCH bpf-next v1 2/2] selftests/bpf: Add alignment flag for test_verifier 190 testcase From: "Emil Tsalapatis" To: "Tiezhu Yang" , "Alexei Starovoitov" , "Daniel Borkmann" , "Andrii Nakryiko" , "Hengqi Chen" X-Mailer: aerc 0.20.1 References: <20260310064507.4228-1-yangtiezhu@loongson.cn> <20260310064507.4228-3-yangtiezhu@loongson.cn> In-Reply-To: <20260310064507.4228-3-yangtiezhu@loongson.cn> On Tue Mar 10, 2026 at 2:45 AM EDT, Tiezhu Yang wrote: > There exists failure when executing the testcase "./test_verifier 190" if > CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS is not set on LoongArch. > > #190/p calls: two calls that return map_value with incorrect bool check= FAIL > ... > misaligned access off (0x0; 0xffffffffffffffff)+0 size 8 > ... > Summary: 0 PASSED, 0 SKIPPED, 1 FAILED > > It means that the program has unaligned accesses, but the kernel sets > CONFIG_ARCH_STRICT_ALIGN by default to enable -mstrict-align to prevent > unaligned accesses, so add a flag F_NEEDS_EFFICIENT_UNALIGNED_ACCESS > into the testcase to avoid the failure. > > This is somehow similar with the commit ce1f289f541e ("selftests/bpf: > Add F_NEEDS_EFFICIENT_UNALIGNED_ACCESS to some tests"). > > Signed-off-by: Tiezhu Yang Reviewed-by: Emil Tsalapatis > --- > tools/testing/selftests/bpf/verifier/calls.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/tools/testing/selftests/bpf/verifier/calls.c b/tools/testing= /selftests/bpf/verifier/calls.c > index 86887130a0ef..29e57f0e56c3 100644 > --- a/tools/testing/selftests/bpf/verifier/calls.c > +++ b/tools/testing/selftests/bpf/verifier/calls.c > @@ -1521,6 +1521,7 @@ > .errstr =3D "R0 invalid mem access 'scalar'", > .result_unpriv =3D REJECT, > .errstr_unpriv =3D "invalid read from stack R7 off=3D-16 size=3D8", > + .flags =3D F_NEEDS_EFFICIENT_UNALIGNED_ACCESS, > }, > { > "calls: two calls that receive map_value via arg=3Dptr_stack_of_caller.= test1",