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 5EF1D282F10 for ; Sat, 3 Oct 2026 13:20:33 +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=1791033634; cv=none; b=FC0d9O1xO1kQ2m5FOSjXXr8dCk7e7FNETDD5x7VzB+peDRwH4tCk8sna/XdDqV/4VOyyislEwjlsbfeyo/oEegPneG5kA3oi9YYfo15TyIGhbHT+WefeEN9MHujyquZhr0/vPhN47j0j817I8XuFCjAYfxlZffPV9JFllVyLnWI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791033634; c=relaxed/simple; bh=GfG2JPe0pBAEw91p3lnuUEjdHbzH76tWpdqFqOhK2wI=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=VldA5yDRnX8K7PnLxhCBqOWMJdtpcZpEzuANeR/7UHt7Kcp441DS+Q4OlwQjKIPx978nlES/5AlbLP6rPpSGEGWv6slIt162TownNAy+9go9YqGtGeWhHpzNTsXG39T4plRgDWlFTAs88onua6SH90iTV+MZlShA8LgdLVr42Yg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PFttDZuE; 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="PFttDZuE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B7EFF1F0089B; Sat, 3 Oct 2026 13:20:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1791033633; bh=OKPK5kUfEJii5bHSGFgnnGHmKb/8xx7qrLYz/vAnn2w=; h=Subject:To:Cc:From:Date; b=PFttDZuE3invMCpjreNjjyX4MbzRMfIEJgU/au95MZFUcsqAYyVnb5ifudzX4s1Ht p8cQmNwU10ZXHWVmUP7LhqAOkyRpq3BoKRnlGnfur+3AnKzQjbXYTRAwHyIeFUeu4g zJBGPYsTKa6ACHFtHKrfCLLFocPk3UGOFOnqdxrI= Subject: FAILED: patch "[PATCH] tpm: Fix auth session leak in tpm2_get_random() error path" failed to apply to 6.18-stable tree To: yijiangshan@kylinos.cn,jarkko@kernel.org Cc: From: Date: Sat, 03 Oct 2026 15:20:17 +0200 Message-ID: <2026100317-paging-handgrip-6a87@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.18-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y git checkout FETCH_HEAD git cherry-pick -x 1e2f9a611b334ce6ed1dc4a9e1587c7a11d2be30 # git commit -s git send-email --to '' --in-reply-to '2026100317-paging-handgrip-6a87@gregkh' --subject-prefix 'PATCH 6.18.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1e2f9a611b334ce6ed1dc4a9e1587c7a11d2be30 Mon Sep 17 00:00:00 2001 From: Jiangshan Yi Date: Wed, 2 Sep 2026 15:48:39 +0800 Subject: [PATCH] tpm: Fix auth session leak in tpm2_get_random() error path When tpm_buf_fill_hmac_session() fails in tpm2_get_random(), the error path returns without calling tpm2_end_auth_session(), leaking the auth session. All other error paths in the function handle this correctly. Fixes: 3d9e043dab0a ("tpm-buf: Memory-safe allocations") Cc: stable@vger.kernel.orga # v6.12+ Signed-off-by: Jiangshan Yi Link: https://lore.kernel.org/r/20260902074839.417419-1-yijiangshan@kylinos.cn Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 48cec39995fe..96e0e06bbbf0 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -281,8 +281,10 @@ int tpm2_get_random(struct tpm_chip *chip, u8 *dest, size_t max) } tpm_buf_append_u16(buf, num_bytes); err = tpm_buf_fill_hmac_session(chip, buf); - if (err) + if (err) { + tpm2_end_auth_session(chip); return err; + } err = tpm_transmit_cmd(chip, buf, offsetof(struct tpm2_get_random_out,