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Miller" , Allison Henderson , Jakub Kicinski , Paolo Abeni , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, rds-devel@oss.oracle.com, "Gustavo A. R. Silva" , linux-next@vger.kernel.org, linux-hardening@vger.kernel.org Subject: Coverity: __rds_rdma_map(): Null pointer dereferences Message-ID: <202403071132.37BBF46E@keescook> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hello! This is an experimental semi-automated report about issues detected by Coverity from a scan of next-20240307 as part of the linux-next scan project: https://scan.coverity.com/projects/linux-next-weekly-scan You're getting this email because you were associated with the identified lines of code (noted below) that were touched by commits: Wed Mar 6 11:58:42 2024 +0000 c055fc00c07b ("net/rds: fix WARNING in rds_conn_connect_if_down") Coverity reported the following: *** CID 1584247: Null pointer dereferences (FORWARD_NULL) net/rds/rdma.c:306 in __rds_rdma_map() 300 unpin_user_pages(pages, nr_pages); 301 kfree(sg); 302 } 303 ret = PTR_ERR(trans_private); 304 /* Trigger connection so that its ready for the next retry */ 305 if (ret == -ENODEV) vvv CID 1584247: Null pointer dereferences (FORWARD_NULL) vvv Dereferencing null pointer "cp". 306 rds_conn_connect_if_down(cp->cp_conn); 307 goto out; 308 } 309 310 mr->r_trans_private = trans_private; 311 If this is a false positive, please let us know so we can mark it as such, or teach the Coverity rules to be smarter. If not, please make sure fixes get into linux-next. :) For patches fixing this, please include these lines (but double-check the "Fixes" first): Reported-by: coverity-bot Addresses-Coverity-ID: 1584247 ("Null pointer dereferences") Fixes: c055fc00c07b ("net/rds: fix WARNING in rds_conn_connect_if_down") Thanks for your attention! -- Coverity-bot