From nobody Fri Apr 3 07:42:21 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 2E65834A3AC for ; Thu, 19 Feb 2026 15:43:51 +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=1771515832; cv=none; b=Nbsgh6fALw5JLQjNAllUGXCBnDYTVGzzD2ttWHV5ODCqj0VPjjafwM/anaOWcikhYz1sO6C+x3PYAFlsMiKjgTbw7or5P0oVJ4s2URA+j0CUhT0WXEDAk7844cLz9CRP9O+0ZV6w4S5J6Q2SDtwbHDp+GmwtMcrd5RTL+aIQPGc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771515832; c=relaxed/simple; bh=L3lZgJogZtRo+hrmpb9U1UPAKGerds0qMe0Up81PuIU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=htP0AOGFZg14zH9Gys2qSaOD/tsqzAzgGo4GtteQyCWzmrV4nhaDWUpncRk8vfNqs6tvnXhTbaidrYomg/+FHlWk2A4wBgOFdsbQZ6yF7bQKaqhFs7z7znzVuHXf6w/W0jWrqom3Xb8XZeKa4ljopIom9s9lul1T8vWlAW9XLr8= 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=bkXnnY3R; 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="bkXnnY3R" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-4806cfffca6so11106905e9.2 for ; Thu, 19 Feb 2026 07:43:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1771515829; x=1772120629; 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=Hyc0hh7Bv1PMxa3L5KyyOW4WOvgP8JpSIAxvqyUwZoc=; b=bkXnnY3R7wa2h+9ve/KZpE5j5fcrl22Oe/rO3ymln+dFTi1ZfjQNdlrmV+Hzcmkqu9 AHZppFB8QvwHWeCcNUa0V/z8pv5rnADPSb4Y8G7+HhSeIAOncEVb/vlCLqd/49RaRK+2 lbm/Pnag9/6ZHN2iWgDcVOF93SXeKyaycB56CNMlFFD87pE0CTO8DV/qL0URwLtenrWA ide7TIej6Swb7jql7KmW0GjQ0J+TNyLVZkcAfM6Pqf40pcugptU8aONyZFRXt8o4/vfh xIqIAUglNRfU+6KSmwnXKQYauG+ezyt5JuQ71y/JoWHA3NZjUURGn/ExIHVky+LfRSrU MvZw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771515829; x=1772120629; 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=Hyc0hh7Bv1PMxa3L5KyyOW4WOvgP8JpSIAxvqyUwZoc=; b=EeF/tYwJmgYvAAi14+PnWelNuUHDpPq4LkqLCTx/f3ZddMTYVmTU3X3dMRrcxa0BZn 5q7lIx4Y4/wMyPQ+56fmtExttwuVr/afxAtJ5jakSCgxBPYckqIG8wLGmLDC0KgOwDDT fnZhPmhN8YS7g5LkFEcZpclt38oa2nlQxJPCzvfng5DhAfeoCMWrJg4/fd0aijm8H5O9 H5UsvCf+498x4ANmAs1yQVEPGX+HzFNkVRqFrPhrDx3diP2MgrL3zDPH/BBl17FuDFGV RCM9ylVhPyRYc6IEWyqaezVMgpugc1K2ZVOccQpwYB9rrL3X5VjIbd0R6HOGSR6EBwHI VDbw== X-Forwarded-Encrypted: i=1; AJvYcCW5DffV5aiBisc7s8+kbvh6fa7IOcFE9vlDAYiomoH/DQwUynxPZ/EzC4XWIfVCdwHvLCMgkVbgrMT69ZI=@vger.kernel.org X-Gm-Message-State: AOJu0YzBo557hi69mYZhb+Nfre4EMwKrxKYwBcadtCCr/P74pgEM7gEP nYPU/9ObP6Nx7UMPI+IH/6ciJA+x3Po4CAePhOQIndCwasJ6vDhPxWHDdzQSYPDTKIypeAJSVTC wZIQnbg== X-Received: from wmjs18.prod.google.com ([2002:a7b:c392:0:b0:482:dff5:2424]) (user=gnoack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:314f:b0:483:6fe1:c057 with SMTP id 5b1f17b1804b1-48373a3f3bcmr344540285e9.21.1771515829387; Thu, 19 Feb 2026 07:43:49 -0800 (PST) Date: Thu, 19 Feb 2026 16:43:37 +0100 In-Reply-To: <20260219154338.786625-1-gnoack@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260219154338.786625-1-gnoack@google.com> X-Mailer: git-send-email 2.53.0.371.g1d285c8824-goog Message-ID: <20260219154338.786625-4-gnoack@google.com> Subject: [PATCH v2 3/4] HID: magicmouse: avoid memory leak in magicmouse_report_fixup() From: "=?UTF-8?q?G=C3=BCnther=20Noack?=" To: Jiri Kosina , Benjamin Tissoires Cc: 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 returning a newly kmemdup()-allocated buffer, but never freeing it. The caller of report_fixup() does not take ownership of the returned pointer, but it *is* permitted to return a sub-portion of the input rdesc, whose lifetime is managed by the caller. 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 2.53.0.371.g1d285c8824-goog