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 29E80547057; Mon, 19 Oct 2026 14:25:51 +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=1792419953; cv=none; b=oPLB1C/IyYh3fMovH43MkGdnZsyOeoDhYQ7TEqg4lTjv4HP0pvYqXci8Dn2OsSTFVbTVnMczIy5k+XpZzbOmabVSUySodGdZgJIN+4mjuitl6Bqv3CFIGFV/8k9Aet1vX+DgG2ITolMWdWB9EIbZGUA+rcWTjb7sWzJbb1fApDo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792419953; c=relaxed/simple; bh=FhD8cjOul20ufMRUv/7NkvhHhd+yl5KRS/rCOUo9Img=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hMUClN24vsb7JC6wHNTN9cGEpX2e7qctkqRlN6Tz6Zo6sXzyyKg92use66atk769FXZKnZSiQ+gXElpEdFNVONL87Zc7Z9Vnt05aG9cvHqznJckHqWCMn3J49bRGIFo/N7S9/hQKq8sfUiZY4QpcK8IdhhS+mT8JjPetshWLctA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=RLxtgJ4X; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="RLxtgJ4X" Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id 2CAC01F000C5; Mon, 19 Oct 2026 14:25:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792419951; bh=uJ9P9whz3YrqTRLsNq+bGdQfSSG5w1KiCyo/gM3zDYI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=RLxtgJ4XFOFx74Pb8d0wsC7YPGdGF42NsRmVXNKBB4rZur/D6goiGFFhd/nxBemEq wbuZMtkV+xtSdBQmQ/Ipgji6wuTYjKvmuuItZY68JjSpOo7jzmcyzxwPGka/aRmYWy AitYV85rqYP/dWFgbJg5IcQ5Y/UruBAmBZWueKPal5Q8X/bG5owlW/Yi7zR1TVK/Yx sPiNSs4Q2Ac1KF49tVf6UNqWdwD1V1igpKjmz7cS2pVkTdupiclCzuPGRoEWezNCeA +qSSUP4IfIXUqfhjpYfm/b2p4vyeYN8yZ6dixQR7/yvx3UZb9+gcz5be6W0Npc6TUL cWCVyJD/WBJyg== From: Jarkko Sakkinen To: David Howells Cc: keyrings@vger.kernel.org, Eric Biggers , Jarkko Sakkinen , stable@vger.kernel.org, Paul Moore , James Morris , "Serge E. Hallyn" , Andrew Morton , linux-security-module@vger.kernel.org (open list:SECURITY SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: [RFC PATCH 5/8] KEYS: Prevent overflow of quota in key_alloc() Date: Mon, 19 Oct 2026 17:25:05 +0300 Message-ID: <20261019142516.300040-6-jarkko@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261019142516.300040-1-jarkko@kernel.org> References: <20261019142516.300040-1-jarkko@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Check that the calculated quota length does not go over INT_MAX. Cc: stable@vger.kernel.org Assisted-by: LLM Fixes: 7e047ef5fe2d ("[PATCH] keys: sort out key quota system") Signed-off-by: Jarkko Sakkinen --- security/keys/key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/security/keys/key.c b/security/keys/key.c index 30f8a8dea206..18043251365f 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -245,7 +245,7 @@ struct key *key_alloc(struct key_type *type, const char *desc, } desclen = strlen(desc); - if (desclen > U16_MAX) + if (desclen > U16_MAX || type->def_datalen > INT_MAX - desclen - 1) goto error; quotalen = desclen + 1 + type->def_datalen; -- 2.47.3