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 AA72C436BC6; Tue, 21 Jul 2026 19:57:38 +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=1784663859; cv=none; b=RsV2uY8s0ayZZDVq0X8N86OCw+jCRt+kORk4HwytflV0ygXSFsPo+BqZYm3qP0l8y/JckgNEOz/I0x2wxcMnUwSuFdCAHYCXj061cozPB57srkWm6V9DFb75uUG4bjeF3hFUY/yz3t0PfVgEY1EFsR5iyYiaAC/xkGQwlkdLiIA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784663859; c=relaxed/simple; bh=2BnhLJP09CtT8Tb8C1G3t8dixa9qutQ+fbs18hE3xTA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b5Ok71ynQDFRSRYoFzA59GrmWsmawMc3r3miA6GcZCAWZAxezybGDHwbfTIA3NHFXo/w0icOW+wCN9MpoAVu0CZvp/5Aq/OskTEQ/FdeIVsicx095llYmUTcl7VADiOqspceCDjQvVbwYUQJd7Gj3HQiAZVCFSXH1n360ody1XU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=yQ6B8UCS; 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="yQ6B8UCS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1B5E71F000E9; Tue, 21 Jul 2026 19:57:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784663858; bh=d5byEv6JQRWD1PnM4BIv7f8SgoZxmumpKFDjszMurp4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=yQ6B8UCSbHtEkzOV7MZp/i7gox6yLubbQ1eK7oFkRVlcHbMoF6oUoAYfgmKtSI9nr kkx9kyEXFRpZjRzqUQ0pKKKornw+ZWK5JIfcxuhKtsOfb/HuS1vgfDvcQiTVe86swn W+MGB0hdvfO5TS19QExs687HzoFkd81KBkVU9wnQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Thorsten Blum , Jarkko Sakkinen Subject: [PATCH 6.12 0983/1276] tpm: fix event_size output in tpm1_binary_bios_measurements_show Date: Tue, 21 Jul 2026 17:23:46 +0200 Message-ID: <20260721152508.013550731@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Thorsten Blum commit 1a58f6115bfb34eabcc7de8a3a9745b219179781 upstream. Commit 186d124f07da ("tpm_eventlog.c: fix binary_bios_measurements") split the output to write the endian-converted event header first and then the variable-length event data. However, the split was at sizeof(struct tcpa_event) - 1, even though event_data was a zero-length array, and later a flexible array member, both of which already excluded the event data. Therefore, the current code writes the first three bytes of event_size from the endian-converted header and then the last byte from the raw header, which can emit a corrupted event_size on PPC64, where do_endian_conversion() maps to be32_to_cpu(). Split one byte later to write the full endian-converted header first, followed by the variable-length event->event_data. Fixes: 186d124f07da ("tpm_eventlog.c: fix binary_bios_measurements") Cc: stable@vger.kernel.org # v5.10+ Signed-off-by: Thorsten Blum Signed-off-by: Jarkko Sakkinen Signed-off-by: Greg Kroah-Hartman --- drivers/char/tpm/eventlog/tpm1.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/char/tpm/eventlog/tpm1.c +++ b/drivers/char/tpm/eventlog/tpm1.c @@ -236,12 +236,12 @@ static int tpm1_binary_bios_measurements temp_ptr = (char *) &temp_event; - for (i = 0; i < (sizeof(struct tcpa_event) - 1) ; i++) + for (i = 0; i < sizeof(struct tcpa_event); i++) seq_putc(m, temp_ptr[i]); temp_ptr = (char *) v; - for (i = (sizeof(struct tcpa_event) - 1); + for (i = sizeof(struct tcpa_event); i < (sizeof(struct tcpa_event) + temp_event.event_size); i++) seq_putc(m, temp_ptr[i]);