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=1794064144; b=KCTREHSi//s9fK41QaVzPoQx3vIZYPMjzfnXx5yoIznaZebg38Fbn0MjOz7Nz5IX8ZOT cDmdI24EINKLRsSU47k45tt3LdTaS1TiJSdVTuJKbtCS46d1Kn7VasxswqA/3AFE5XRpa J1GEsx/KkUWszse20EdQJZ4w8/AfwXQwwQNHJ+VS908lYF4eo/UkS/lAxwIXdAe/l7w7B FiRid17ZHv8AZVLimk6rPzxhA915Lrl28kjcaba9AQwrskx5vfcMTKWpDaMlU2YdkvTPj t3WbM5jQZ38aWNUTzdIOmQ/wL2f1wAk5HPHHB3UopPnGjDhNJ7hYH3WeLcFK+ezl4Yw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794064144; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=IasYLd+CS8/vVI9o0sbHU2smA1OF4wN4M50iEGegFKE=; b=06cOjHjDPih7CbY8MwLHoVC4D1dIgT7VCsd46xQHeOBg/GRvEkOT2wGDkVtM1LQtyFHJ Ebh/9CBEkadJl70516/pMdnJIWz/TN8dskwd95YTjYWwx6YXvIp44H9mZgpxAkiyxslgG Lc4usKK7buhaOILMzTxiLWyC0Aaie1gt6KrA4gE9mISAdcpk0c5eY0Q4S6OrWPvbRq1n0 evh1uORI6Bpr0ppN+6DOE7a+BVzvImHwheMDPoZMpzDhEODEpXbDt7dlZX9cXu45zHf2B 8K3qrEYNxMXdEr3cLUcqkBkFV2PzmQB/JWmExizRqrKokV5Sd81LqAyZ4MFmrSUerww== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=rz67r4x8; 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 ESMTPS id 7926C606A33F; Sat, 7 Nov 2026 15:09:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=rz67r4x8 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 268401F0089F; Sat, 7 Nov 2026 15:09:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794064144; bh=IasYLd+CS8/vVI9o0sbHU2smA1OF4wN4M50iEGegFKE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=rz67r4x8jAPcpL1zjsMs81HKeQVPSnm9/06ElD36v1b5k3JKcr4FSUSclKboPd8JO mJCJim84m4cdirNnv/4vAQnlZt3NaSvPAFDUpzszXwqijvut9tLVOg1W87xPzoWfab bzqRms1k1tL2tqPXS59j++QUcyXxhtU7d5ca3hh8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Weili Qian , Herbert Xu , Sasha Levin Subject: [PATCH 7.3 0253/1257] crypto: hisilicon/hpre - fix pointer dereference before length check Date: Sat, 7 Nov 2026 08:42:29 -0500 Message-ID: <20261107134946.494658875@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134939.434104957@linuxfoundation.org> References: <20261107134939.434104957@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@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 7.3-stable review patch. If anyone has any objections, please let me know. ------------------ From: Weili Qian [ Upstream commit 9770bb7d335f8f8db01e99168bbdd9ce2cb6238c ] In hpre_rsa_drop_leading_zeros(), the loop condition dereferences *ptr before checking *len, causing an out-of-bounds read when *len is zero. Swap to while (*len && !**ptr) to test length first. Fixes: c8b4b477079d ("crypto: hisilicon - add HiSilicon HPRE accelerator") Cc: stable@vger.kernel.org Signed-off-by: Weili Qian Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- drivers/crypto/hisilicon/hpre/hpre_crypto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c index 09077abbf6ade..7894211b99727 100644 --- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c +++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c @@ -720,7 +720,7 @@ static void hpre_dh_exit_tfm(struct crypto_kpp *tfm) static void hpre_rsa_drop_leading_zeros(const char **ptr, size_t *len) { - while (!**ptr && *len) { + while (*len && !**ptr) { (*ptr)++; (*len)--; } -- 2.53.0