From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-186.mta0.migadu.com (out-186.mta0.migadu.com [91.218.175.186]) (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 76C35371069 for ; Thu, 26 Feb 2026 21:50:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.186 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772142653; cv=none; b=elPMi7MMviPnw3OnnYB2MwWA8BRThizN2SWuUF1p+sGMNCcfrI4uKSGoYKSKeOnDgNtKqsU6nrhZ2YwbA0v8RmTEWJh7iUVjEliDHctR2l3avrYvD/2j+wRS5NbCCqPrQoaZ/zwApttZERnG+wGBmRfN5On6Hz4WoAYCMvB5YPQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772142653; c=relaxed/simple; bh=CSV+m72mnmToW621YIZp9bVTf9rkjaYunWFtN8HQugQ=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lItIm4fUD8h1brFh0IYigcuBeNOdCr3E6o8RttiAUumG++mp4mI20XsJhJaIzeMab1jFqFm4384sftke3zBoMhEgmi3iX/kMtUljx+F8DF2CZp9M4FGw+u/h2zHjt2gjDnR8rEOQEAc/BLUGmloE4ysexJkdHaZcs/mtAak9K5o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=pr0erWDl; arc=none smtp.client-ip=91.218.175.186 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="pr0erWDl" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1772142640; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=m/VMPk7L7XpjPfDSURdzShzsddu6apjP5T3tDOQx7t8=; b=pr0erWDlUPPP+oGucNUxBaN2jRJPc47A5aB15bfRuRvzvyQtS30XpoNR0muDG1Rc3itcmh vKFRONKkXHzSTG0J9GS/p4Btu1zWYMsZ9ItPLStDysoGlvXLLmrfb8GAXyd8cnR3789rQu XuQRYxsRJmxzI9K1BAplD8gJmmAS3R8= From: Thorsten Blum To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: linux-hardening@vger.kernel.org, Thorsten Blum , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next] keys, dns: Use kmalloc_flex to improve dns_resolver_preparse Date: Thu, 26 Feb 2026 22:49:29 +0100 Message-ID: <20260226214930.785423-3-thorsten.blum@linux.dev> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT Use kmalloc_flex() when allocating a new 'struct user_key_payload' in dns_resolver_preparse() to replace the open-coded size arithmetic. Signed-off-by: Thorsten Blum --- net/dns_resolver/dns_key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c index c42ddd85ff1f..891287a86979 100644 --- a/net/dns_resolver/dns_key.c +++ b/net/dns_resolver/dns_key.c @@ -215,7 +215,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep) kdebug("store result"); prep->quotalen = result_len; - upayload = kmalloc(sizeof(*upayload) + result_len + 1, GFP_KERNEL); + upayload = kmalloc_flex(*upayload, data, result_len + 1); if (!upayload) { kleave(" = -ENOMEM"); return -ENOMEM; -- Thorsten Blum GPG: 1D60 735E 8AEF 3BE4 73B6 9D84 7336 78FD 8DFE EAD4