From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 92379156237; Mon, 6 Jan 2025 15:36:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736177807; cv=none; b=Lf/mMWpeGhnaPieAXWPxeigAlnK1TINX/2hI/R9Blh2GJBflcHViFBRpP5s8Lj62Z4Cir6Mg5nVv9ClKBE+FPwOdeykbfubv7JWj5j0XmGQiPrLoX5rqbWVQYJAb5l3FzkExFicSpBj6R528yINzsYFc4tRYUNBITkupyT/bF4I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736177807; c=relaxed/simple; bh=5g4dWCtd0Zrf9wyKXzWP4ddM0TOds4hw47Fax1T3vQo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=avs9B+5Ruo8osPCof0cplNthwCoPgVq+3AKl6IvPeJGwmucuRLM8oUIbhPpVu5WrGw6NpZsXFED3TDZ+o7mZZmCDE2Q1KVYJbSBoZu9qpsJvK9Va8fEnVQ/DbctnFPnF/j0IZFkuFwTdVZryoEbSmEWWIKOVl7MzIE/W6GSB0tg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TZ1YJ374; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="TZ1YJ374" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 183D1C4CED2; Mon, 6 Jan 2025 15:36:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736177807; bh=5g4dWCtd0Zrf9wyKXzWP4ddM0TOds4hw47Fax1T3vQo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TZ1YJ374zbddXqS0hUzAuz6zUzm1Nu5w8p4HZH+JxbTMcoYMDFoa1T3O4bxLLGS1T STbWJtf+e9AOV/xRRN+kWODhcTAD6zOX4seuHNXRTSPeq3WQDU/lHuYNzC8KLXsLqX /AkplIHL3vMUnpCQbcJM84Owm4LcdPwGz0w4hJUs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Li Zhijian , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.12 064/156] RDMA/rtrs: Ensure ib_sge list is accessible Date: Mon, 6 Jan 2025 16:15:50 +0100 Message-ID: <20250106151144.145933802@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250106151141.738050441@linuxfoundation.org> References: <20250106151141.738050441@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Li Zhijian [ Upstream commit fb514b31395946022f13a08e06a435f53cf9e8b3 ] Move the declaration of the 'ib_sge list' variable outside the 'always_invalidate' block to ensure it remains accessible for use throughout the function. Previously, 'ib_sge list' was declared within the 'always_invalidate' block, limiting its accessibility, then caused a 'BUG: kernel NULL pointer dereference'[1]. ? __die_body.cold+0x19/0x27 ? page_fault_oops+0x15a/0x2d0 ? search_module_extables+0x19/0x60 ? search_bpf_extables+0x5f/0x80 ? exc_page_fault+0x7e/0x180 ? asm_exc_page_fault+0x26/0x30 ? memcpy_orig+0xd5/0x140 rxe_mr_copy+0x1c3/0x200 [rdma_rxe] ? rxe_pool_get_index+0x4b/0x80 [rdma_rxe] copy_data+0xa5/0x230 [rdma_rxe] rxe_requester+0xd9b/0xf70 [rdma_rxe] ? finish_task_switch.isra.0+0x99/0x2e0 rxe_sender+0x13/0x40 [rdma_rxe] do_task+0x68/0x1e0 [rdma_rxe] process_one_work+0x177/0x330 worker_thread+0x252/0x390 ? __pfx_worker_thread+0x10/0x10 This change ensures the variable is available for subsequent operations that require it. [1] https://lore.kernel.org/linux-rdma/6a1f3e8f-deb0-49f9-bc69-a9b03ecfcda7@fujitsu.com/ Fixes: 9cb837480424 ("RDMA/rtrs: server: main functionality") Signed-off-by: Li Zhijian Link: https://patch.msgid.link/20241231013416.1290920-1-lizhijian@fujitsu.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/ulp/rtrs/rtrs-srv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c index e83d95647852..ef4abdea3c2d 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -349,6 +349,7 @@ static int send_io_resp_imm(struct rtrs_srv_con *con, struct rtrs_srv_op *id, struct rtrs_srv_mr *srv_mr; bool need_inval = false; enum ib_send_flags flags; + struct ib_sge list; u32 imm; int err; @@ -401,7 +402,6 @@ static int send_io_resp_imm(struct rtrs_srv_con *con, struct rtrs_srv_op *id, imm = rtrs_to_io_rsp_imm(id->msg_id, errno, need_inval); imm_wr.wr.next = NULL; if (always_invalidate) { - struct ib_sge list; struct rtrs_msg_rkey_rsp *msg; srv_mr = &srv_path->mrs[id->msg_id]; -- 2.39.5