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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , linux-kernel@vger.kernel.org, Henry Martin Subject: [PATCH 0/3] rxrpc: fix three bugs found by autokbug fuzzing Date: Sun, 23 Aug 2026 13:53:15 +0800 Message-ID: <20260823055318.371374-1-bsdhenrymartin@gmail.com> X-Mailer: git-send-email 2.43.7 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit These three patches fix independent rxrpc bugs found by the autokbug dynamic kernel fuzzer at Tencent Yunding Lab. [1/3] Stack OOB read in TLP soft-ACK processing. A malicious peer can deterministically trigger it over an unencrypted (security-none) AF_RXRPC association - an immediate KASAN stack-out-of-bounds report even at the minimum offset. [2/3] kernel BUG in netns teardown: the conn_proc_list assertion in rxrpc_destroy_all_connections() races with connection destructors deferred to system_wq and fires on a healthy state, killing the cleanup_net kworker. Unprivileged userns+netns reachable. [3/3] WARN_ON in rxrpc_alloc_txqueue(): the TX_NO_MORE entry check from commit ae4f89989479 ("rxrpc: Fix ability to add more data to a call once MSG_MORE deasserted") is not re-done after sleeping in wait_for_space, so a racing sendmsg on the same call reaches the WARN on a legal finalized-call state (spurious splat and -ENOMEM; panic_on_warn DoS). Thanks, Henry Henry Martin (3): rxrpc: fix stack OOB read in TLP soft-ACK processing rxrpc: wait for deferred conn destruction before conn_proc_list check rxrpc: recheck RXRPC_CALL_TX_NO_MORE after sleeping in rxrpc_send_data() net/rxrpc/ar-internal.h | 3 ++- net/rxrpc/conn_object.c | 10 ++++++---- net/rxrpc/sendmsg.c | 8 ++++++++ 3 files changed, 16 insertions(+), 5 deletions(-) -- 2.43.0