From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 F38841A6192; Tue, 30 Jul 2024 16:35:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722357360; cv=none; b=Ou87LAdeXok8+rKkMuB1V8sf8kL/wlhGHDb2Zw5lFOT8S0AoEETqPBe2RPM3/rmg28cU1bpRfh5EUOjnJDbdcibmAox3vdg91TSupqmjKlR2HKealkZhFCzoJyS6Ix/ujbqqMypnRs/xU+tl//lh4sVmB9M+wN7eUwF8xXr/Xyc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722357360; c=relaxed/simple; bh=Ogz+kzssn0QchiFCKEiDRvcKcjk067GPSod8eNi2RMM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ksAyW6/dxiT9XMwhmqe1M4xxFKqBEGuVI4on0eZXT7IlyuowdE9zqovTkafn8LkPMw2V2r/YVCHv7CSYe7tOBdlH6SclFmNNEiFGhKR4EsEqhMwnhmma7hi1iPU6+kxMka/3LUehwXsMj9GwE+0RkKDOm37a8bzGiYTRmd9C9ZI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=oKlZqciG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="oKlZqciG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F240C4AF15; Tue, 30 Jul 2024 16:35:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1722357359; bh=Ogz+kzssn0QchiFCKEiDRvcKcjk067GPSod8eNi2RMM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=oKlZqciG1CSDvNPVQeToJ16UfU/BxNCjP4MbYQmDQm3EvAC4zRt3ngxkNzq1TMie6 7ybcVLvpRygw84Ih63kwlI+ztscayownSiGPUKjcKC6eDbebOXLvuRVE6nfoJVuLW7 gjEKPfmfJiN/2JDbyrOGGqlVcDa/ZP+WzA1KDoUU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Joe Hattori , Jarkko Sakkinen Subject: [PATCH 6.1 285/440] char: tpm: Fix possible memory leak in tpm_bios_measurements_open() Date: Tue, 30 Jul 2024 17:48:38 +0200 Message-ID: <20240730151626.962803606@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240730151615.753688326@linuxfoundation.org> References: <20240730151615.753688326@linuxfoundation.org> User-Agent: quilt/0.67 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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joe Hattori commit 5d8e2971e817bb64225fc0b6327a78752f58a9aa upstream. In tpm_bios_measurements_open(), get_device() is called on the device embedded in struct tpm_chip. In the error path, however, put_device() is not called. This results in a reference count leak, which prevents the device from being properly released. This commit makes sure to call put_device() when the seq_open() call fails. Cc: stable@vger.kernel.org # +v4.18 Fixes: 9b01b5356629 ("tpm: Move shared eventlog functions to common.c") Signed-off-by: Joe Hattori Signed-off-by: Jarkko Sakkinen Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/eventlog/common.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/char/tpm/eventlog/common.c +++ b/drivers/char/tpm/eventlog/common.c @@ -47,6 +47,8 @@ static int tpm_bios_measurements_open(st if (!err) { seq = file->private_data; seq->private = chip; + } else { + put_device(&chip->dev); } return err;