Return-Path: Received: from mail.kernel.org ([198.145.29.99]:48626 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730209AbeLFOoD (ORCPT ); Thu, 6 Dec 2018 09:44:03 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Arnd Bergmann , "David S. Miller" Subject: [PATCH 4.14 54/55] net: qed: use correct strncpy() size Date: Thu, 6 Dec 2018 15:39:28 +0100 Message-Id: <20181206143004.650713862@linuxfoundation.org> In-Reply-To: <20181206143001.749982936@linuxfoundation.org> References: <20181206143001.749982936@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann commit 11f711081af0eb54190dc0de96ba4a9cd494666b upstream. passing the strlen() of the source string as the destination length is pointless, and gcc-8 now warns about it: drivers/net/ethernet/qlogic/qed/qed_debug.c: In function 'qed_grc_dump': include/linux/string.h:253: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=] This changes qed_grc_dump_big_ram() to instead uses the length of the destination buffer, and use strscpy() to guarantee nul-termination. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/qlogic/qed/qed_debug.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/drivers/net/ethernet/qlogic/qed/qed_debug.c +++ b/drivers/net/ethernet/qlogic/qed/qed_debug.c @@ -3590,10 +3590,8 @@ static u32 qed_grc_dump_big_ram(struct q total_blocks = big_ram->num_of_blocks[dev_data->chip_id]; ram_size = total_blocks * BIG_RAM_BLOCK_SIZE_DWORDS; - strncpy(type_name, big_ram->instance_name, - strlen(big_ram->instance_name)); - strncpy(mem_name, big_ram->instance_name, - strlen(big_ram->instance_name)); + strscpy(type_name, big_ram->instance_name, sizeof(type_name)); + strscpy(mem_name, big_ram->instance_name, sizeof(mem_name)); /* Dump memory header */ offset += qed_grc_dump_mem_hdr(p_hwfn,