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Wed, 06 Aug 2025 04:45:16 -0700 (PDT) Received: from localhost ([196.207.164.177]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-459c58ed07fsm142317845e9.22.2025.08.06.04.45.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Aug 2025 04:45:16 -0700 (PDT) Date: Wed, 6 Aug 2025 14:45:13 +0300 From: Dan Carpenter To: Stefan Metzmacher Cc: Steve French , Paulo Alcantara , Ronnie Sahlberg , Shyam Prasad N , Tom Talpey , Bharath SM , linux-cifs@vger.kernel.org, samba-technical@lists.samba.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org Subject: [PATCH next] smb: client: Fix use after free in send_done() Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline X-Mailer: git-send-email haha only kidding Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The mempool_free() function frees "request". Don't free the request until after smbd_disconnect_rdma_connection() to avoid a use after free bug. Fixes: 5e65668c75c0 ("smb: client: let send_done() cleanup before calling s= mbd_disconnect_rdma_connection()") Signed-off-by: Dan Carpenter --- fs/smb/client/smbdirect.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/smb/client/smbdirect.c b/fs/smb/client/smbdirect.c index 58321e483a1a..162f8d1c548a 100644 --- a/fs/smb/client/smbdirect.c +++ b/fs/smb/client/smbdirect.c @@ -286,8 +286,8 @@ static void send_done(struct ib_cq *cq, struct ib_wc *w= c) if (wc->status !=3D IB_WC_SUCCESS || wc->opcode !=3D IB_WC_SEND) { log_rdma_send(ERR, "wc->status=3D%d wc->opcode=3D%d\n", wc->status, wc->opcode); - mempool_free(request, request->info->request_mempool); smbd_disconnect_rdma_connection(request->info); + mempool_free(request, request->info->request_mempool); return; } =20 --=20 2.47.2