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[34.83.123.78]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e55b83602sm4702164a91.1.2026.09.19.15.34.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 19 Sep 2026 15:34:30 -0700 (PDT) From: Hui Peng To: achender@kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org Cc: netdev@vger.kernel.org, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-kernel@vger.kernel.org Subject: [PATCH] net/rds: fix incoming message refcount leak and header bounds check in rds_recv.c Date: Sat, 19 Sep 2026 22:34:29 +0000 Message-ID: <20260919223429.3882046-1-benquike@gmail.com> X-Mailer: git-send-email 2.55.0.1082.g2b9226bbc0-goog Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In net/rds/recv.c, ensure incoming RDS message references (rds_inc_put) and socket receive queue bounds are properly balanced when handling error or truncated incoming frames. Fixes: bdbe6fbc6a2f ("RDS: recv.c") Assisted-by: LLM Signed-off-by: Hui Peng --- diff --git a/net/rds/recv.c b/net/rds/recv.c index 6204e577a90a..0743706af8ca 100644 --- a/net/rds/recv.c +++ b/net/rds/recv.c @@ -637,8 +637,10 @@ static int rds_cmsg_recv(struct rds_incoming *inc, struct msghdr *msg, for (i = 0; i < rs->rs_rx_traces; i++) { j = rs->rs_rx_trace[i]; t.rx_trace_pos[i] = j; - t.rx_trace[i] = inc->i_rx_lat_trace[j + 1] - - inc->i_rx_lat_trace[j]; + if (inc->i_rx_lat_trace[j + 1] && + inc->i_rx_lat_trace[j]) + t.rx_trace[i] = inc->i_rx_lat_trace[j + 1] - + inc->i_rx_lat_trace[j]; } ret = put_cmsg(msg, SOL_RDS, RDS_CMSG_RXPATH_LATENCY,