From nobody Wed Apr 1 12:34:28 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 E84F33CD8D9 for ; Tue, 31 Mar 2026 07:40:58 +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=1774942863; cv=none; b=gdmvzYgMq/Me2KLUW9DNnU1xe4O7hmS7lfN42cZqaE+Cu29QGuS21cQ/8xZvN+J58g+W8cNFXvzu4pCD68s5MH5TbH5OpDI+zi/3OWlpX86MOdxket2aCG1megosAaYR+UCTYNjQ0ABiFkhoAlOkLLa7lF6wCT2TriaadeAad9o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774942863; c=relaxed/simple; bh=nSOeRy9yjh9m3FQneok9U0OvjSYiWqO2RbCLMu4zLnM=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=SovGsGTH03FEJrwWXCI0MUHqEN53qc0U1Empg8yifIHImZLQmF5Se+EGpV3qaSShJY7IYWu9G+JkWW6Tf5I49g6I79NaWLxCnzzpL8my85MeLVU+X9sIj2Tmqnwmhtg3lOh0rLt4RsrIjFjy/cA9+f994MgwvaQdJpiP4Lg7aDM= 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=KTM7ZsOk; 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="KTM7ZsOk" Received: by mail-wm1-f73.google.com with SMTP id 5b1f17b1804b1-48378df3469so36957955e9.1 for ; Tue, 31 Mar 2026 00:40:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1774942857; x=1775547657; darn=vger.kernel.org; h=content-transfer-encoding:cc:to:from:subject:message-id :mime-version:date:from:to:cc:subject:date:message-id:reply-to; bh=mMHyAJ93rDGMSG71PUrqZFXXLKPTxBZ/U5bGQv1HBLQ=; b=KTM7ZsOk3ML3QGj4L/R9CMG6U3kk/+syLp4P7RPrcdOiXmBqQxQ1zDNsYoaFEr2FxB X1w1gTFD3+I3mS3eaitk1v98u2mxWyQ6ahRaWVPZlkVvMdlPtSqSlSMoJDntrl357UzX Ye29/8JzkaqpEaL9ZR0J1zIDE9SyCBpgT22xN6V1vdbA0xQium+HGf4+54OnLdd4VMla Wyhzv6oca3Ur2EIi/Htb+cLnUY5T2H908nAx7+Tapx85vb1yrJ0t58RSgRXZw0Q0dM7p dQLWq8L7MxK3/bdgXt200yuM08u4gmHBGHfw0xR1S3xBPX9OW51TuI+CoaaEbAtIpvUB dXmw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774942857; x=1775547657; h=content-transfer-encoding:cc:to:from:subject:message-id :mime-version:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=mMHyAJ93rDGMSG71PUrqZFXXLKPTxBZ/U5bGQv1HBLQ=; b=estZXH8WqCvKaPjS9GIeQb2Df/568JU3+mHklC2xZrRT2QDxS4VaoFhsnk7tmmF8qf GfIwzORFs5jIoDDZHdN1WZMWklmhRBQrPq8kXPSONs2sBhAJh4+y+Y+zJDFqb8K38Pdn vvRQnXGyraZsQvOEDbLXCM7p6AjXDMTjegW4NX6lF2TuYG10SEQ+fivx3NO3oljugHF5 MwXChzqE0t+HvJCAiICHlii4GIzZQFZZgQIjFexQbgONv3CHk4x3v70k8dxzJiHs2rA6 r3GWZFZY5n/JB/T5zahiVQ0VgwZbOp6sPadChOqb3zVt8/w+okzVnndBmZsvItlxTHLE JRYg== X-Forwarded-Encrypted: i=1; AJvYcCWbvDW8ffMsDRLkwyxSNC2VetafiIiRQI4TerpiCeG2Y4io6vWViSsU+PN220gRQ9IDvwsPgf4uO3ApUag=@vger.kernel.org X-Gm-Message-State: AOJu0YxvoWbBEKP40labCm3BknsqYrtAJFq4LbLBkkDH9ySjTvk/1/jx bMhiLIJ1UYWAWGyOInYKlCwRWhMX0njY5YO4ay5gvpWlblXM/wWyNvepdlJzREMjU36JWRetorJ Yb+ceEQ== X-Received: from wmti11.prod.google.com ([2002:a05:600c:8b8b:b0:485:37cb:adc1]) (user=gnoack job=prod-delivery.src-stubby-dispatcher) by 2002:a05:600c:83c3:b0:485:3428:774c with SMTP id 5b1f17b1804b1-48878281a4cmr39196805e9.4.1774942857164; Tue, 31 Mar 2026 00:40:57 -0700 (PDT) Date: Tue, 31 Mar 2026 09:40:51 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.53.0.1018.g2bb0e51243-goog Message-ID: <20260331074052.194064-1-gnoack@google.com> Subject: [PATCH] HID: logitech-hidpp: Check bounds when deleting force-feedback effects From: "=?UTF-8?q?G=C3=BCnther=20Noack?=" To: "=?UTF-8?q?Filipe=20La=C3=ADns?=" , Bastien Nocera , Jiri Kosina , Benjamin Tissoires Cc: "=?UTF-8?q?G=C3=BCnther=20Noack?=" , Lee Jones , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Without this bounds check, this might otherwise overwrite index -1. Triggering this condition requires action both from the USB device and from userspace, which reduces the scenarios in which it can be exploited. Cc: Lee Jones Signed-off-by: G=C3=BCnther Noack Reviewed-by: Lee Jones --- drivers/hid/hid-logitech-hidpp.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hi= dpp.c index d1dea7297712..5f63f1d2303a 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -2502,12 +2502,15 @@ static void hidpp_ff_work_handler(struct work_struc= t *w) } break; case HIDPP_FF_DESTROY_EFFECT: - if (wd->effect_id >=3D 0) - /* regular effect destroyed */ - data->effect_ids[wd->params[0]-1] =3D -1; - else if (wd->effect_id >=3D HIDPP_FF_EFFECTID_AUTOCENTER) - /* autocenter spring destroyed */ - data->slot_autocenter =3D 0; + slot =3D wd->params[0]; + if (slot > 0 && slot <=3D data->num_effects) { + if (wd->effect_id >=3D 0) + /* regular effect destroyed */ + data->effect_ids[slot-1] =3D -1; + else if (wd->effect_id >=3D HIDPP_FF_EFFECTID_AUTOCENTER) + /* autocenter spring destroyed */ + data->slot_autocenter =3D 0; + } break; case HIDPP_FF_SET_GLOBAL_GAINS: data->gain =3D (wd->params[0] << 8) + wd->params[1]; --=20 2.53.0.1018.g2bb0e51243-goog