From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 523E0384258; Tue, 21 Jul 2026 20:47:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784666846; cv=none; b=kGaVeVsiegm4x9gOB9KIeySLsYzwd4HM33w85m4xcNePUxNi7SpGblEpIV+em01YaGa/aOYKRcqzy6L1/qgnoOpEEK27R458GQSYpg2fbnaUNlRupC4+8ZQuW55sp8miKxt4FW2ZycKutI0CDNnn1quGpOC2FKMQ4lKdH9SaYyw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784666846; c=relaxed/simple; bh=aJHu2EkD/tNeJc5ks+HnhKV3rkWqh1ox3P9N3S2yQs0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E6ZFqB41PsXJtzFLdLXf7/RIc7JQ7tsXVyA1qafSZlPGAVsa4pFVD40ZxoQeDNOEahCxTXDyC0nEq2UHv1q3dQFib95nMl3IGvCs3aCfCE946z+GDtATNsmwpGaIQ6m6xIPRpTHGplrgtkbENhYbvfM4VsGiutLm8Rqbuy+aBWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Z6lCJM/d; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Z6lCJM/d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B88171F00A3A; Tue, 21 Jul 2026 20:47:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784666845; bh=SFs7SSWpgErp94kwjFBGJClRmvH1Km0lW2RYxMOu85Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Z6lCJM/dvwK+M2PAuEQOOFfcTs46gYFqfsrfv468eO3HA5WCfAXaEf6tnmFhgc/7f do9/GTqHT6bKEpZZYZZeBM6E8tWjQfgvxbk1rAKXfFnNhpHJB+fCVRiaI7ksRn1jSz 8V0QKhvHxYgltDXhR3RlyIvxl+jQ4i18ycBfNcVY= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Lee Jones , Jiri Kosina , Sasha Levin Subject: [PATCH 6.6 0838/1266] HID: core: Fix OOB read in hid_get_report for numbered reports Date: Tue, 21 Jul 2026 17:21:15 +0200 Message-ID: <20260721152500.605815267@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lee Jones [ Upstream commit af1a9b65ebe8a948eda805c14b78d4d0767cb1b5 ] When a caller passes a size of 0 to hid_report_raw_event() for a numbered report, the function originally called hid_get_report() before performing any size validation. Inside hid_get_report(), if the report is numbered (report_enum->numbered is true), it unconditionally dereferences data[0] to extract the report ID. With a size of 0, this results in an out-of-bounds read or kernel panic. Fix this by moving the numbered report size validation check before the call to hid_get_report(), ensuring that size is at least 1 before dereferencing the data pointer. Fixes: 2c85c61d1332 ("HID: pass the buffer size to hid_report_raw_event") Signed-off-by: Lee Jones Signed-off-by: Jiri Kosina Signed-off-by: Sasha Levin --- drivers/hid/hid-core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c index 2de4d831c526a8..b3bcc0fdede7ff 100644 --- a/drivers/hid/hid-core.c +++ b/drivers/hid/hid-core.c @@ -1998,6 +1998,13 @@ int hid_report_raw_event(struct hid_device *hid, enum hid_report_type type, u8 * u8 *cdata = data; int ret = 0; + if (report_enum->numbered && (size < 1 || bufsize < 1)) { + hid_warn_ratelimited(hid, + "Event data for numbered report is too short (%d vs %zu)\n", + size, bufsize); + return -EINVAL; + } + report = hid_get_report(report_enum, data); if (!report) return 0; -- 2.53.0