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 707D28F5D for ; Sun, 16 Jul 2023 20:40:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E6FC2C433C7; Sun, 16 Jul 2023 20:40:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689540037; bh=tDEY2Jg+E3JWJHtY7yGVeW6buAETziqXevjbXQJTiX4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1iwJpii0NBkUTSyIWanrVkyiPaID7B0N4uR7UpG/6fHaK3q/zS6rCwTvaj6PVMzG/ U8qJ6f7vrsG17nl5Q4UJdtn072V+4yR0M8SyuYOZLfX3KcMbwQmRSj2GRXHWfLCC5g SOymm0UMniFH69ESBQ/bWlim7UrYCDHbNmd4fvoA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arnd Bergmann , Shiraz Saleem , Jason Gunthorpe , Sasha Levin Subject: [PATCH 6.1 220/591] RDMA/irdma: avoid fortify-string warning in irdma_clr_wqes Date: Sun, 16 Jul 2023 21:45:59 +0200 Message-ID: <20230716194929.562766840@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194923.861634455@linuxfoundation.org> References: <20230716194923.861634455@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Arnd Bergmann [ Upstream commit b002760f877c0d91ecd3c78565b52f4bbac379dd ] Commit df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") triggers a warning for fortified memset(): In function 'fortify_memset_chk', inlined from 'irdma_clr_wqes' at drivers/infiniband/hw/irdma/uk.c:103:4: include/linux/fortify-string.h:493:25: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning] 493 | __write_overflow_field(p_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The problem here isthat the inner array only has four 8-byte elements, so clearing 4096 bytes overflows that. As this structure is part of an outer array, change the code to pass a pointer to the irdma_qp_quanta instead, and change the size argument for readability, matching the comment above it. Fixes: 551c46edc769 ("RDMA/irdma: Add user/kernel shared libraries") Link: https://lore.kernel.org/r/20230523111859.2197825-1-arnd@kernel.org Signed-off-by: Arnd Bergmann Acked-by: Shiraz Saleem Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- drivers/infiniband/hw/irdma/uk.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/irdma/uk.c b/drivers/infiniband/hw/irdma/uk.c index 16183e894da77..dd428d915c175 100644 --- a/drivers/infiniband/hw/irdma/uk.c +++ b/drivers/infiniband/hw/irdma/uk.c @@ -93,16 +93,18 @@ static int irdma_nop_1(struct irdma_qp_uk *qp) */ void irdma_clr_wqes(struct irdma_qp_uk *qp, u32 qp_wqe_idx) { - __le64 *wqe; + struct irdma_qp_quanta *sq; u32 wqe_idx; if (!(qp_wqe_idx & 0x7F)) { wqe_idx = (qp_wqe_idx + 128) % qp->sq_ring.size; - wqe = qp->sq_base[wqe_idx].elem; + sq = qp->sq_base + wqe_idx; if (wqe_idx) - memset(wqe, qp->swqe_polarity ? 0 : 0xFF, 0x1000); + memset(sq, qp->swqe_polarity ? 0 : 0xFF, + 128 * sizeof(*sq)); else - memset(wqe, qp->swqe_polarity ? 0xFF : 0, 0x1000); + memset(sq, qp->swqe_polarity ? 0xFF : 0, + 128 * sizeof(*sq)); } } -- 2.39.2