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([140.174.215.70]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4a779e90ffasm4502441cf.70.2025.06.19.20.11.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Jun 2025 20:11:36 -0700 (PDT) From: Emil Tsalapatis To: bpf@vger.kernel.org Cc: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, memxor@gmail.com, sched-ext@meta.com, Emil Tsalapatis Subject: [PATCH bpf-next 0/2] bpf/arena: Add kfunc for reserving arena guard memory regions Date: Thu, 19 Jun 2025 23:11:16 -0400 Message-ID: <20250620031118.245601-1-emil@etsalapatis.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add a new kfunc for BPF arenas that reserves a region of the mapping to prevent it from being mapped. These regions serve as guards against out-of-bounds accesses and are useful for debugging arena-related code. Emil Tsalapatis (2): bpf/arena: add bpf_arena_guard_pages kfunc selftests/bpf: add selftests for bpf_arena_guard_pages kernel/bpf/arena.c | 95 +++++++++++++++- .../testing/selftests/bpf/bpf_arena_common.h | 3 + .../selftests/bpf/progs/verifier_arena.c | 106 ++++++++++++++++++ .../bpf/progs/verifier_arena_large.c | 93 +++++++++++++++ 4 files changed, 294 insertions(+), 3 deletions(-) -- 2.49.0