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=1792433876; b=0qeMo4Qh0+HOx5Xdyfkopkbs78gZq6uQtjuFpp0Gm5YBGDmEIJ7cw68SHsRZgKgKPpf9 NW2R8fCUUp6G5l//N/MHAkceBptxCUHIYhQRno0gnS3jhMGOGFtk9Yr9KqyWTEdm6vW/Z DlniCX+MgsaAm63be2ScODLpZt+piSfMPwKN9CZEAx45OXqT/0sR5irudlIBLHvEtMm4L eQ9y7WRp5+1t3L+464z0I/S+5bWOMIf4gxJxZhPmt5fyft7agF0CuIFlFqBXuZmaMyd1g FK4E7ZXtKtPl4f6YVnCij2Arq1Sok9qoNEeaFzbVzqUM3gJMr+tvduJY9Z5U3NmbBSw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792433876; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:Content-Transfer-Encoding; bh=TxT5MkEpHy2GUxsA9o7iiZv/Vrk1zXGXHdpML8q2bwU=; b=uUzcO8HNI0Sev0eMhZDzHg2St25+BDO2aFKSHoY4CbfFe/uajjHS3DTEJydYotVi1U5h zVweNZjVwgSgIpEq0phtSF5FGdLAsTWF6rMI6mxPHspN30NqNqaSHvQJnqf4Mksa7nJ/8 WLicwVAWbllhLwk+mGfoLsBGrgvrBsoE9F3ERNHPbXRs1hSMG4Panxzcn0Iy/nh4+2Ssx 50doLV+ixTtVo3g8vH08o3cyxEzydUHzgpYKIuXhTQKNBlQkNyDdyFcaDo0VMLXlThw0/ HJTZhyDxuwIU0KSQxn3XDroAgp/MGG8qQjdpg7NYynbXcb6T5paser63cWVlbYb3lQg== 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="CP/rIHgJ"; 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 4107D606A31D; Mon, 19 Oct 2026 18:17:55 +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=CP/rIHgJ Received: by smtp.kernel.org (Postfix) with UTF8SMTPSA id 48EE81F000C6; Mon, 19 Oct 2026 18:17:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792433875; bh=TxT5MkEpHy2GUxsA9o7iiZv/Vrk1zXGXHdpML8q2bwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CP/rIHgJgbyuPLLhLxhHSzJqxyorPHg+KuaqpZvyF7/dRlyrUzRiHaECHVwfw8eM+ UAsASneoN57gOu09dxpGc/Sa6spO7cpaitneKPo057o7GjFEcT/Y/SSBO4iYqCvrPZ Z1mGM2pNSV3otVdKMit0ykVWVeVkXYewRqWWaFNlmH0FgtTyh2sAkEtqCArIfej/fl pqUIHrsu4RlCv7wjYPSFFbDPJzPxwTMzbmRYeXzLJvaGCeOXdLI+jTzzuyAxX2UWOc xlKxiCVux323Lo7w2nEB9KQkaAcXj3YzSn3UUL1//QGlceKcWjdJfNtlrH1dBdTTMh q8s6oV0MSMA0A== 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: [PATCH v2 4/6] KEYS: Prevent overflow of quota in key_alloc() Date: Mon, 19 Oct 2026 21:17:24 +0300 Message-ID: <20261019181732.449591-5-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 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") Reviewed-by: David Howells 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 d4e4a2e89a20..dbf5626a48b7 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 >= KEY_MAX_DESC_SIZE) + if (desclen >= KEY_MAX_DESC_SIZE || type->def_datalen > INT_MAX - desclen - 1) goto error; quotalen = desclen + 1 + type->def_datalen; -- 2.47.3