From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792433881; b=KdFNEmfhuhtbFDlwtPqmwPdHyZSuRRIiFfM67czS28R/2rA7VHLNZafZrQRv5wbZvTv9 xuNUR1u7DQw+m5fhGnMeNtakrl2iu3YX5uhVYOhCmmqbKYwZizRhijUj1xSLYTo9p9W7b jqzxhtH6jlv8Pc85nmehAUWodmpUirqDKPFKOOlL7AyZ/FUTM37g6jAFoTd116EfkqhRf l6cU8d8Zckoxnifir7c86qRqBOWeja2Th2DmX6+x6kp0pcuCdI+AqjEcpD2LBGytdg8yR YXdju1S655y4rPDJfR+yxDMdAbqhKbRsM9jVBIWjhy9oDTKEJNcCRukcIAIY/ZBxftg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792433881; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=acg8T1h3CP9b+Pbi7wYrl5dgPp8n7OnwctjB/+c79FI=; b=in6fqTMAcDhTFKljkMwngVXReOFW6Aybm9tfA3PSh+Ndv10AQiMpLGMFTQahZQjfrAX6 c+yn5l1ycHtj0NHpoaPKMzsutLlvnXEEZwGKmSVQveqNB06/LYm+6TsCKNJE0IdKkN1Tw 40Qvw6PyM56QOV6G2rZCMYAiIHwoxFJ+7vvojDPJ4RPAItUEMyGmXSs59xBvCSAowjPN6 Pn3TLCCqvId9CDU3y7f0UO/iAUazXXbZxQwtTkffDA6Bat7JNHSSvEYFG2RU7uV9KxlQ0 MFGlwCBaNDZR5fRb4GzSZU+sYVOVbIW6o2NQoqH7OoJ6lOhbYnXwlNOmmkLhhE2veaA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="k/C5fKB/"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with UTF8SMTPS id 789D3606A319; Mon, 19 Oct 2026 18:18:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=k/C5fKB/ Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id C48591F000C6; Mon, 19 Oct 2026 18:18:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792433881; bh=acg8T1h3CP9b+Pbi7wYrl5dgPp8n7OnwctjB/+c79FI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=k/C5fKB/vJ25NS3VOcEi5R5Yn0aZiY51Nz1m708LNtFtIBQ8SS4qeCGdF0dfZXMrs uiHg15Lo+SkFXVeNpBvC8skmG4mfIrnb86dY766mac6TYW+U+UdMdk2QtEaZ2Gdr8s TFBCpyaKlP+7dM5fhVTtKScatovVDJ+ERRHzxNAglEV0S0KU5z6nlpr7rcj7MbDGmQ 93Vn62qGM3sviYkIhF1TNX0aZ1Xth+9GZsS7QyoL9JN2fSpy8qJGkP45Oiif4dza/E sWMAFw4FJ/jz1Wyey2Jr04td/3g4++Lz7WXXi0dogRTR/8BOBvL869DD9cK3eBb/1S XaXDMYAvJ5qVA== 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" , linux-security-module@vger.kernel.org (open list:SECURITY SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2 5/6] KEYS: Reject @datalen values over INT_MAX Date: Mon, 19 Oct 2026 21:17:25 +0300 Message-ID: <20261019181732.449591-6-jarkko@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261019181732.449591-1-jarkko@kernel.org> References: <20261019181732.449591-1-jarkko@kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Protect quota from overflowing by rejecting @datalen values that surpass over INT_MAX. Cc: stable@vger.kernel.org Assisted-by: LLM Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reviewed-by: David Howells Signed-off-by: Jarkko Sakkinen --- security/keys/key.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/security/keys/key.c b/security/keys/key.c index dbf5626a48b7..fbd608634bde 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -384,6 +384,9 @@ int key_payload_reserve(struct key *key, size_t datalen) key_check(key); + if (datalen > INT_MAX) + return -EINVAL; + /* contemplate the quota adjustment */ if (delta != 0 && test_bit(KEY_FLAG_IN_QUOTA, &key->flags)) { unsigned maxbytes = uid_eq(key->user->uid, GLOBAL_ROOT_UID) ? -- 2.47.3