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[2a01:cb08:8949:7e00:50f5:e208:50bb:f776]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48541b7f406sm156122585e9.13.2026.03.11.09.13.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Mar 2026 09:13:33 -0700 (PDT) Date: Wed, 11 Mar 2026 17:13:31 +0100 From: Paul Chaignon To: Tiezhu Yang Cc: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Hengqi Chen , loongarch@lists.linux.dev, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH bpf-next v1 2/2] selftests/bpf: Add alignment flag for test_verifier 190 testcase Message-ID: References: <20260310064507.4228-1-yangtiezhu@loongson.cn> <20260310064507.4228-3-yangtiezhu@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260310064507.4228-3-yangtiezhu@loongson.cn> On Tue, Mar 10, 2026 at 02:45:07PM +0800, 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 > --- > 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 = "R0 invalid mem access 'scalar'", > .result_unpriv = REJECT, > .errstr_unpriv = "invalid read from stack R7 off=-16 size=8", > + .flags = F_NEEDS_EFFICIENT_UNALIGNED_ACCESS, > }, Acked-by: Paul Chaignon > { > "calls: two calls that receive map_value via arg=ptr_stack_of_caller. test1", > -- > 2.42.0 > >