From nobody Fri Apr 3 06:28:31 2026 Received: from mail-wm1-f73.google.com (mail-wm1-f73.google.com [209.85.128.73]) (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 CE40A36C595 for ; Tue, 17 Feb 2026 16:01:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771344118; cv=none; b=jl9Jav4bAhdgVPT3xf5Mu04m7UKE1432zmny5H5Apx9IGXNn4NuEtIfTCMZOzQIPLgu7ZyJOhAFoqi/JDXSLpOubYCXbd3HPc0xeZE+PD6U5rki+ejcCwSRwi05j5vHy0tZ6tLxgZa9dhdrSmzSD62cvqkwTPzGGrvlzCO0niuU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771344118; c=relaxed/simple; bh=Pz4lfEfYS4nyE/SQUqp3w27aSTJnY160w0WTT8a8SnM=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=bcAdBOrZKpjl4lTP2WjxP4LfUMqSkEcoNrpkqbmRcZ/+WTbWK0oNMLFi34rbDoPDAub3ssOnLj2fMvyKkKVudKIxWJZwB7GmP+CZFMFtddTpdb9pwaZtPWvTDG02xeVz1h5uKnL+EYo6V3ebKlhoSier/IVYTcIT/vyPMlUFXrQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--gnoack.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FKalUF5i; arc=none smtp.client-ip=209.85.128.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--gnoack.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FKalUF5i" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-4803e8b6007so37350155e9.0 for ; Tue, 17 Feb 2026 08:01:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1771344115; x=1771948915; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:from:to:cc:subject:date:message-id :reply-to; bh=vmHbHptT/xQLvcgY8qMF4oxcaID/3KLnmaRfPxMJwO0=; b=FKalUF5iO9+SSJphELBuNcNCB/8Mf/OBTBYb6GwzGyp63Mtb7Ka6r1R6iBUyaDxs0v vsboTvUUdqpw9CRpiiwGQPVb06TR4gXzPg9kkEL6KjhMYnf3VOTLgfYn0764GSB0mf8s f1wCTbke0g4fINm58ztaFg3LSk/XH2w3MTwJTT7b8PrGGU2a0cmIAa0X+4cwUWc/EAvP oQEHm0Chm0q6b37/rTRM2wzrXUn3P04eo0od1AoRD2RIn9YCzmlfUnCuBwytsRkQY763 VoQ9pGDdSOpeqO38OM1gjXNTT1KQlKBUWMo0+9i8ZEEE3RkV6h8NjiNKa7vd/hLnM3CN UY5Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771344115; x=1771948915; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=vmHbHptT/xQLvcgY8qMF4oxcaID/3KLnmaRfPxMJwO0=; b=kFvNScw1hcYA5W0qQGNu47n/9+NcfqOKksgffz2y8n+yfEz/MkTQ15Yf+liG9dLZ4H 0/iI+IdvFW1FWU+pElWew5gjtMPqIgoMiZ513Q1EAfhxk6Io2EvTvM+JiYJiwrHUEI0d Qyp5ladbX6YmqjL+abUI6oEI5G9ch2IpljeY9U4f5fIvoYJ7AQ8osuSXZUs/tkHnqMCG zd08wvVX7QPgpoeFlUUgq7j5Kd2XhXcE+ugJ7BND/+ErL/gAzo+Pk2mdTP4e/Xl0Ulmq rn9ljSKN8Rq2saTpZv7nI0gn3t6qA4VwUvGxo9RK4O6DITjwDJZ73/ulqxVlg0ZEu4um 565w== X-Forwarded-Encrypted: i=1; AJvYcCWQ5pXDN2b3LarYDdqqNwLSL57CXwj9mAvmRyb7P/5L/VVcgw/0QAr2yrHzdO4Th88TA+8ZhxgmK2J20Vc=@vger.kernel.org X-Gm-Message-State: AOJu0YyVSKXQbJFw/UbN8DRSQ8hFdFywug9pmthBJbHGiFzLbe+CRtt8 NrtK22G6n62mFepRmpnDO9d5T/0ay8UktjKOyh+dTITVd0HRVxfsV7O4liJQPVMQewTh0SA2Z1x 0P2nLqg== X-Received: from wmbhc11.prod.google.com ([2002:a05:600c:870b:b0:47e:da9a:d7da]) (user=gnoack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:1907:b0:479:3a86:dc1c with SMTP id 5b1f17b1804b1-48373a7a0eamr239685595e9.36.1771344115180; Tue, 17 Feb 2026 08:01:55 -0800 (PST) Date: Tue, 17 Feb 2026 17:01:24 +0100 In-Reply-To: <20260217160125.1097578-1-gnoack@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260217160125.1097578-1-gnoack@google.com> X-Mailer: git-send-email 2.53.0.335.g19a08e0c02-goog Message-ID: <20260217160125.1097578-3-gnoack@google.com> Subject: [PATCH 2/3] HID: magicmouse: avoid memory leak in magicmouse_report_fixup() From: "=?UTF-8?q?G=C3=BCnther=20Noack?=" To: Jiri Kosina Cc: Benjamin Tissoires , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, "=?UTF-8?q?G=C3=BCnther=20Noack?=" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The magicmouse_report_fixup() function was allocating a new buffer with kmemdup() but never freeing it. Since the caller already provides a writable buffer and allows returning a pointer within it, modify the descriptor in-place and return the adjusted pointer. Assisted-by: Gemini-CLI:Google Gemini 3 Signed-off-by: G=C3=BCnther Noack --- drivers/hid/hid-magicmouse.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c index 91f621ceb924..17908d52c027 100644 --- a/drivers/hid/hid-magicmouse.c +++ b/drivers/hid/hid-magicmouse.c @@ -994,9 +994,7 @@ static const __u8 *magicmouse_report_fixup(struct hid_d= evice *hdev, __u8 *rdesc, hid_info(hdev, "fixing up magicmouse battery report descriptor\n"); *rsize =3D *rsize - 1; - rdesc =3D kmemdup(rdesc + 1, *rsize, GFP_KERNEL); - if (!rdesc) - return NULL; + rdesc =3D rdesc + 1; =20 rdesc[0] =3D 0x05; rdesc[1] =3D 0x01; --=20 2.53.0.335.g19a08e0c02-goog