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[2603:8081:1405:679b:740c:28cd:7fdb:8de1]) by smtp.gmail.com with ESMTPSA id bd15-20020a056808220f00b003a75593746asm1510230oib.57.2023.09.25.08.25.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 25 Sep 2023 08:25:57 -0700 (PDT) Message-ID: <53244849-efeb-a56b-55e1-417a19d2000a@gmail.com> Date: Mon, 25 Sep 2023 10:25:56 -0500 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.15.1 Subject: Re: [bug report] blktests srp/002 hang To: Bart Van Assche , "Daisuke Matsuda (Fujitsu)" , 'Rain River' Cc: Zhu Yanjun , Jason Gunthorpe , "leon@kernel.org" , Shinichiro Kawasaki , RDMA mailing list , "linux-scsi@vger.kernel.org" References: <5a4efe6f-d8c6-84ce-377e-eb64bcad706c@linux.dev> <6fc3b524-af7d-43ce-aa05-5c44ec850b9b@acm.org> <02d7cbf2-b17b-488a-b6e9-ebb728b51c94@acm.org> <8aff9124-85c0-8e3b-dc35-1017b1540037@gmail.com> <3c84da83-cdbb-3326-b3f0-b2dee5f014e0@linux.dev> <4e7aac82-f006-aaa7-6769-d1c9691a0cec@gmail.com> <29c5de53-cc61-4efc-8e8d-690e27756a16@acm.org> Content-Language: en-US From: Bob Pearson In-Reply-To: <29c5de53-cc61-4efc-8e8d-690e27756a16@acm.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On 9/25/23 10:00, Bart Van Assche wrote: > On 9/24/23 21:47, Daisuke Matsuda (Fujitsu) wrote: >> As Bob wrote above, nobody has found any logical failure in rxe >> driver. > > That's wrong. In case you would not yet have noticed my latest email in > this thread, please take a look at > https://lore.kernel.org/linux-rdma/e8b76fae-780a-470e-8ec4-c6b650793d10@leemhuis.info/T/#m0fd8ea8a4cbc27b37b042ae4f8e9b024f1871a73. I think the report in that email is a 100% proof that there is a use-after-free issue in the rdma_rxe driver. Use-after-free issues have security implications and also can cause data corruption. I propose to revert the commit that introduced the rdma_rxe use-after-free unless someone comes up with a fix for the rdma_rxe driver. > > Bart. Thanks Bart, I missed that. This will give me a better target to try to track this down. Bob