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 2860739FCE; Mon, 6 Jan 2025 15:57:04 +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=1736179025; cv=none; b=UfvS2HvDvn2usJ5nVLsW+cSfltahZ0rQ6TARUhkLrdpW1g35QC/Ac9eW+To6lWaQhJWTjGjRdKHkuHLpSgrzBcynZzS1LdceJ1GPR91nkoADbWBk27aRBp9eR9+IFIiWQb4bR5IrkJouwCPWCZNO7GB1dOqVXzbiOt5QFDehHX0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736179025; c=relaxed/simple; bh=/43JuC+WiLBEtPmtnJbm04CyuFYEUWIl9LuHH3E5epI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rKFqtkwC2Aarf7QfGKW6KHK3DyPhmmO8z2AiM/rhfOk4LsxO78anMxfM/o8gTnfoT7p0/UneySSzP7kL0go5frluAGb/6dZa+1Dkxci0O8msd8aXC6LSlVmxICcW1L6jg6Tz1+EbXuG8JFKaKeR1AkyH66ZVWZJ9aOI4K80NKRo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=lRofcHBj; 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="lRofcHBj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5ADD2C4CED2; Mon, 6 Jan 2025 15:57:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1736179024; bh=/43JuC+WiLBEtPmtnJbm04CyuFYEUWIl9LuHH3E5epI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lRofcHBj7MFv7XLTp5IzzMseqoXR2pBiZxiBcAZhtP5E8XEkW2I1dg+Wszptnydx/ kzuCTbyg8MxwMKy1gzUED5Zao3QhCUpkFhRmsWcYRa+dK0uHpqK6jx+0P5PSKU1SYv O7YYKbes7kfcfOmCB4UjVDGQ97V1h2OBnuV3KQEY= 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 5.15 139/168] RDMA/rtrs: Ensure ib_sge list is accessible Date: Mon, 6 Jan 2025 16:17:27 +0100 Message-ID: <20250106151143.686471598@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250106151138.451846855@linuxfoundation.org> References: <20250106151138.451846855@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 5.15-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 4fa916a8f386..96fe7c97bc71 100644 --- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c +++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c @@ -353,6 +353,7 @@ 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; @@ -403,7 +404,6 @@ 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