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 DEBCB330B02; Tue, 16 Dec 2025 09:21:54 +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=1765876915; cv=none; b=CXqbn6GUPoA6IppjWuNiJOP8C1p3LeqzSJC1JGaqpcSmS+WrGkoFoIubzMWOSjA4lSfptzBzcKsxYKW170r1xA3FqEdf7NivHkSWI4Q31Xlta6pG4mfYz0I9b6xCTj5YtbHmMiehIyZ1V0JFDmpv4b5kcOXGmx6dEE3OtzGIfqc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765876915; c=relaxed/simple; bh=u6HWC/nUh3OKQvYFMbBVlQmz7mIz9B4bfR7y1Ey4mmg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=Biytp4dDTGr2RQZW+bt+KwK9csiufTayz2vJ/EYh1hOYDXfYVTgDjfA4u2o56wVJ6ClXOj/n2/3JVfCxYq1AGvZb6RwrjtRau5+/zMZqtuBWcSkkZvF45QzdMhaMuQDHJCsNi5CS7ftY7roexu7aOI9qfP2PyHOOUlGEixeoFxg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=f7vkOCHD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="f7vkOCHD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 05F3EC4CEF1; Tue, 16 Dec 2025 09:21:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765876914; bh=u6HWC/nUh3OKQvYFMbBVlQmz7mIz9B4bfR7y1Ey4mmg=; h=From:To:Cc:Subject:Date:From; b=f7vkOCHDLvhcOIBrjYT0KYltf2Snezc+3YiKEGf/yiS+VwNrJxP/Uoy6C2vDp+d+J fGYk4umUvA7Su0hOf97mxwODOcCUGjiPueDy/1l0t9A8nHvLK71B6Lysyec5L84nRm 3ZW7B48vQeowQhpWT56x+iW2ypxK0oh3W7ME4g2eNg8dyJZCZgQ4owun33SSIccUz0 jjkLzL1IYkE6EnutwiHO6L0LzwMrAifgcvt0SV2fJusSUDh5oBELiYgCr3CvLrHZDF nHIcsjgAeGVS9Ihlp2VEf+22DbPITzz2shzN+42g226OncKjWpUYP1MOw59Cjdlw3+ SEoc8vxH+p/Ig== From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: Jarkko Sakkinen , David Howells , Paul Moore , James Morris , "Serge E. Hallyn" , keyrings@vger.kernel.org (open list:KEYS/KEYRINGS), linux-security-module@vger.kernel.org (open list:SECURITY SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v8 00/12] Streamline TPM2 HMAC sessions Date: Tue, 16 Dec 2025 11:21:34 +0200 Message-Id: <20251216092147.2326606-1-jarkko@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-integrity@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This patch set contains accumulated patches, which gradually improve TPM2 HMAC session management and TPM driver memory management. RNG test ======== I run this test both TPM1 and TPM2 chips using QEMU and swtpm: #!/bin/sh ctrl_c() { set +e echo 0 > tracing_on echo nop > current_tracer echo BYE exit } trap ctrl_c EXIT INT mount -t tracefs none /sys/kernel/tracing set -e cd /sys/kernel/tracing echo function > current_tracer echo p:tpm_get_random tpm_get_random > kprobe_events echo tpm_get_random > set_ftrace_filter echo 1 > tracing_on cat /dev/hwrng > /dev/null & echo > trace cat trace_pipe & sleep 10 Change Log ========== v8: - Patch was a bit out-of-sync after piling new stuff. Now it is somewhat sane: RNG patches first, then tpm2-sessions and finally managed tpm_buf allocations. - I added inline comment on explaining why unconditional sha256_update() call is safe to do when managing only single authorization handle. v7: - Updated cover letter to match better the current state of the patch set. v6: - OK, so I decided to send one more update with managed allocations moved to the tail so that it does not block reviewing more trivial patches. - Trimmed some of the patches and improved commit messages. v5: - I decided to add the managed allocation patch to this and take it from the master branch for the time being, as it needs more eyes despite having already one reviewed-by tag (especially tested-by tags). Jarkko Sakkinen (12): KEYS: trusted: Use get_random-fallback for TPM KEYS: trusted: Use get_random_bytes_wait() instead of tpm_get_random() tpm: Orchestrate TPM commands in tpm_get_random() tpm: Change tpm_get_random() opportunistic tpm2-sessions: Define TPM2_NAME_MAX_SIZE KEYS: trusted: Open code tpm2_buf_append() KEYS: trusted: Remove dead branch from tpm2_unseal_cmd KEYS: trusted: Re-orchestrate tpm2_read_public() calls tpm2-sessions: Remove the support for more than one authorization tpm-buf: Remove tpm_buf_append_handle tpm-buf: Merge TPM_BUF_BOUNDARY_ERROR and TPM_BUF_OVERFLOW tpm-buf: Implement managed allocations drivers/char/tpm/tpm-buf.c | 156 ++++----- drivers/char/tpm/tpm-interface.c | 145 ++++++++- drivers/char/tpm/tpm-sysfs.c | 23 +- drivers/char/tpm/tpm.h | 3 - drivers/char/tpm/tpm1-cmd.c | 198 ++++-------- drivers/char/tpm/tpm2-cmd.c | 371 +++++++--------------- drivers/char/tpm/tpm2-sessions.c | 281 +++++++--------- drivers/char/tpm/tpm2-space.c | 44 ++- drivers/char/tpm/tpm_vtpm_proxy.c | 30 +- include/linux/tpm.h | 77 +++-- security/keys/trusted-keys/trusted_tpm1.c | 70 ++-- security/keys/trusted-keys/trusted_tpm2.c | 329 ++++++++++--------- 12 files changed, 783 insertions(+), 944 deletions(-) -- 2.39.5