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[198.162.52.65]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-84f5a552859sm172922b3a.42.2026.08.06.17.44.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 17:44:07 -0700 (PDT) From: Ning Ding To: bpf@vger.kernel.org Cc: memxor@gmail.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, shuah@kernel.org, Ning Ding Subject: [PATCH bpf-next 0/2] bpf: Compare iterator types during state pruning Date: Thu, 6 Aug 2026 17:43:18 -0700 Message-ID: <20260807004320.134069-1-dingning04@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Iterator stack slots can be marked MEM_RCU or PTR_UNTRUSTED. The STACK_ITER check in stacksafe() does not compare this type, so state pruning can treat these states as equal and prune an unsafe path. Compare the type and add a test where RCU protection has a gap. Ning Ding (2): bpf: Compare iterator types during state pruning selftests/bpf: Test RCU iterator state pruning kernel/bpf/states.c | 3 ++- .../selftests/bpf/progs/iters_task_failure.c | 27 +++++++++++++++++++ 2 files changed, 29 insertions(+), 1 deletion(-) -- 2.43.0