From nobody Thu Apr 9 18:54:23 2026 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4611366DA6 for ; Fri, 6 Mar 2026 06:35:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772778942; cv=none; b=HkAVUB5o75g71q3C6QcHZNHUYt+SeIVK8yoJwPia9sR0sjTlzt+l2XZjkq+KCQ0KhvmPRHjXwElYfkB4xKCOVVj0yHdjuj9UirSsaROmtxDuefSkh7IU9fCjMWA2WW/ZnQ9GEy5PX2TGPiLqg0rC1Rwon3H8Qr4QjzoCd10GcBw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772778942; c=relaxed/simple; bh=9cQdIdDbfHBxQdVjl1wma1djHdHSQkCaWml9R0EIOqw=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=djbJ23vi6uIdzT3pVZoVXjQNbSdkZcf5Ej7j+gFihA1VmCK0oloaEnaQw+7TiJCzQ8udx09qQyyqKcw1otMFPq+OF2CyESgLTjNppO4LDYibTo+CUCROJWRHope+10JW3H6/1cKjY0vzOu/7fgYv94vu/BKCDdym2ZZrrl1UFWU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=ElgVPC8s; arc=none smtp.client-ip=209.85.214.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ElgVPC8s" Received: by mail-pl1-f178.google.com with SMTP id d9443c01a7336-2ae505619baso31798465ad.2 for ; Thu, 05 Mar 2026 22:35:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1772778941; x=1773383741; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=O00SvXmF1/neLG6bXArW7CD/JczRf42amEzXY9wGYt8=; b=ElgVPC8sKDMRj4sc7J22emogY1ycBWQ/bj+kzeMim6SLxqBP6Zj3JTxvi/UZRuwg83 KT7M9Y2MEjT5Ywz/SNDT+mZt0PIVYcanrtiS7PX5jWABI9cPru8+o5nBqVc+Tg36biaS eOnas/+TUq+P1mVyUD8VMwqFzxSjCT0IdSJ5FG8sDeEjaHkQugnZKQCOEZC9fOgmMyaK tptdlEydMT6+l/RDj7yG0difu1toTc/rwy5kEOmCckRR77IRLHhDnlKzUkTZN22Ibfd5 IuHCakZelZeCOwDupwWmx66/PNV7kL7w6DfyNjUsf+mktwu8ZcCG3HXgOGcST+d28fIv 6ztw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772778941; x=1773383741; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=O00SvXmF1/neLG6bXArW7CD/JczRf42amEzXY9wGYt8=; b=ctctHqMujKApT2sDtwb5HTL5vv7KLK0FuvqX9It/EnA1VfgSYjEJOBOdyL+FT7l6ex EpwTX0/3Ac5+W/soibZpWZftaIZDUOvmda4QKPuBtH4/oA3tDgsxmqU5y0cQzIe2bMfW kwQXJMU2g4y5WZIiI4Ivg70h2VDg30fbXBRGg6UyiWFWRpo8JvHZ9/k9ulOZ+/bdOBJ0 qr0Krclcviu6/UWCiiENa2EJJH16/HlTHUTVsg5s+pcOJLDpebzhqZOAUrKJ7roE+C4T 9u9aP7ttHDZ1Bt7+1M6+aIxAIHvp0v40Jfr/4fdWs9MWSomF9E5K8TIHkdG+5mgkDQ+K 2btw== X-Forwarded-Encrypted: i=1; AJvYcCX6L/waPn/mBwLb/Ew88rPwzG8s7sAHmpQ2tN7qxF1AHGwlj63djr8XZu8xkNYNkOY1Lw34SHTOrFnHCwc=@vger.kernel.org X-Gm-Message-State: AOJu0YwHBLzwh5vMprJxlxeaJ5bKtI5YjkI6lbKQVHG0kPppwM8zujJ8 vbbudZPSrZ2xj+1SSwaUv3lVhVjV8hUk0j2weqYzk5HIlJjbrmVuProg X-Gm-Gg: ATEYQzxyJg4z/dvYEoKs+b3+5wVk65jUJRgl6610h3azFm5l/IBJOv/UbFdgpx03i+J oUpzprn5auHw8nJpaH1+XJrqI/uAIxBeib+ESCX04Quxs/CULB0K60HHgnod81hZAFOnZPaT+LA UV1wW0KkMTeLaSVE/lGDwaY1aVkFqcOzB2Wm643if7934qBi2nSu34psjlQ/zMruFIYBJMI2kPs 0pEP92omVtDjpV+1uNXV8+qrdYO+LJQOzfu8+6UH60J1qNyibmbdr8kt2S3036BOEEDoFkj0jKR agWBtV8tDfIXkbWJoqpYHSAU3p66pQXHiCIw3qvqT8cFSgY4LGgYDr1or+g6EBjZEg3tcfh/1CV lClHfOo9as/yKW95oJsfAFNWFNSgBRJf+GXNbIL036ZkZy0tnQCmJh+69QCcom4d4m7GNx0hYc6 3j9Pi0I/zEO+0m03SXULB8gPqsjldYKjD4dRD51Lt/pEyHg4bCVGAAxEQ= X-Received: by 2002:a17:903:46c4:b0:2ae:5063:b3e0 with SMTP id d9443c01a7336-2ae823febb1mr13075235ad.9.1772778941243; Thu, 05 Mar 2026 22:35:41 -0800 (PST) Received: from ryzen ([2601:644:8000:56f5::8bd]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ae83f752bfsm9788055ad.60.2026.03.05.22.35.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Mar 2026 22:35:39 -0800 (PST) From: Rosen Penev To: linux-cifs@vger.kernel.org Cc: Namjae Jeon , Steve French , Sergey Senozhatsky , Tom Talpey , Kees Cook , "Gustavo A. R. Silva" , linux-kernel@vger.kernel.org (open list), linux-hardening@vger.kernel.org (open list:KERNEL HARDENING (not covered by other areas):Keyword:\b__counted_by(_le|_be)?\b) Subject: [PATCH] ksmbd: ipc: use kzalloc_flex and __counted_by Date: Thu, 5 Mar 2026 22:35:22 -0800 Message-ID: <20260306063522.439782-1-rosenp@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The former is just a nice macro and the latter allows runtime analysis of the allocation and its size. Signed-off-by: Rosen Penev --- fs/smb/server/transport_ipc.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/smb/server/transport_ipc.c b/fs/smb/server/transport_ipc.c index 2dbabe2d8005..f7aa427a06fe 100644 --- a/fs/smb/server/transport_ipc.c +++ b/fs/smb/server/transport_ipc.c @@ -55,7 +55,7 @@ static bool ksmbd_ipc_validate_version(struct genl_info *= m) struct ksmbd_ipc_msg { unsigned int type; unsigned int sz; - unsigned char payload[]; + unsigned char payload[] __counted_by(sz); }; =20 struct ipc_msg_table_entry { @@ -242,9 +242,8 @@ static void ipc_update_last_active(void) static struct ksmbd_ipc_msg *ipc_msg_alloc(size_t sz) { struct ksmbd_ipc_msg *msg; - size_t msg_sz =3D sz + sizeof(struct ksmbd_ipc_msg); =20 - msg =3D kvzalloc(msg_sz, KSMBD_DEFAULT_GFP); + msg =3D kvzalloc_flex(*msg, payload, sz, KSMBD_DEFAULT_GFP); if (msg) msg->sz =3D sz; return msg; --=20 2.53.0