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Mon, 06 Apr 2026 12:44:09 -0700 (PDT) Received: from localhost ([2a03:2880:10ff:8::]) by smtp.gmail.com with ESMTPSA id 46e09a7af769-7dbb5c96485sm8368068a34.22.2026.04.06.12.44.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Apr 2026 12:44:09 -0700 (PDT) From: Kumar Kartikeya Dwivedi To: bpf@vger.kernel.org Cc: Emil Tsalapatis , Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Martin KaFai Lau , Eduard Zingerman , Tejun Heo , Dan Schatzberg , kkd@meta.com, kernel-team@meta.com Subject: [PATCH bpf-next v5 2/7] bpf: Enable unaligned accesses for syscall ctx Date: Mon, 6 Apr 2026 21:43:56 +0200 Message-ID: <20260406194403.1649608-3-memxor@gmail.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260406194403.1649608-1-memxor@gmail.com> References: <20260406194403.1649608-1-memxor@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=791; h=from:subject; bh=NRGoKvu5ZhkzjVJydlyhFleI0DNN1HXfpOCVOcpw4Bk=; b=owGbwMvMwCXmrmtenRyi38x4Wi2JIfMKD9ulzPUFfv5Wlbm1N54ILdT6/Zw5VreUYTvDhoshlRvP 6vt0lLIwiHExyIopspT838dkfKLyd6DtMm6YOaxMIEMYuDgFYCKcSxn+l8vfPH9psoa+/DfJKVNX35 9i9fGetXHD/X/neqZovYrVd2Rk+OCtncP1m/FyS+BduQDd+3cvz839q1O2qJdHdu5zSesnnAA= X-Developer-Key: i=memxor@gmail.com; a=openpgp; fpr=B34BD741DE8494B76E2F717880EF20021D46C59B Content-Transfer-Encoding: 8bit Don't reject usage of fixed unaligned offsets for syscall ctx. Tests will be added in later commits. Unaligned offsets already work for variable offsets. Reviewed-by: Emil Tsalapatis Signed-off-by: Kumar Kartikeya Dwivedi --- kernel/bpf/syscall.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 810991709da7..f1044ab9b03b 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -6386,8 +6386,7 @@ static bool syscall_prog_is_valid_access(int off, int size, { if (off < 0 || off >= U16_MAX) return false; - if (off % size != 0) - return false; + /* No alignment requirements for syscall ctx accesses. */ return true; } -- 2.52.0