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=1794062933; b=yb15sduQOIvWMdQPJpqe7RJmcntUHm1ltcFsmZn2EePUHsMHxl135A6R1w1k2+lHUNNi SHJEroI5K+GKkovvW6Tzw2MA0a4aUb8QLjQTNc4WCc8iD6p+QBxDM4AXiBS+nueAliqnq 7WikfY6O18aZ1P7Vx2DQOQCkEz8agqjm1raKQJzOOpBGsYtxCi/P8Nu+xdkhkd04G7H5P ge0iDzXErf32na17CSX+/GLOitqKv7y0pNBx3qB8gvRwrp22rkZTEbgFjmwZzMIvRUa7l s4gBDKC8V0lMegNh9yOJjHFCOiKZRtn3USeGOpJk3b0Hv06blT9/it0c0dNslcBV6iQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794062933; 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=9sLcet4f+n+AyKe0OMqxV6XiznXQK8SnavVQ30A6cII=; b=EMBlSZNjfGzt6RUCzFL9q86NHr7XZ6jL7f33dR9SOGVVOGzeMzJM2/TDkCiKu/rgoi99 PNlrRbtEq4eK4NTRc0EeiEQ07wROea50O/TcpncJgBGbVnQ80/GKZu0tssCKAU9GrFQ6U Ji1m7d27xOihaE7izrVfPKo55T47nWTWvSImEHJXzWdOai+XEHVNeP4HAwrXWyGNWxpGD x7EYN9nQs3y/OZ81zZ/ed8iov+QmeOu/W92/ai5RN+uSq5k2UpR6wgaP//2MD0N47xP9b 7OWDP8wseM8VgnvYPj1BORHY9ABNNCPmY7Wo/YvL2F64y8U952go6KjiMuabbQzLNXQ== 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=btuVALdZ; 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 631D1606A326; Sat, 7 Nov 2026 14:48:53 +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=btuVALdZ Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02BBA1F0089F; Sat, 7 Nov 2026 14:48:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794062933; bh=9sLcet4f+n+AyKe0OMqxV6XiznXQK8SnavVQ30A6cII=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=btuVALdZjJL5jaLorV4TsluTAHr8M81TE3h2VaxPBOjY7/vL7EfU0qQYtlXHO2t4T JlMle6v/U8UNiZEVWd9cTkwkPEu7t+btsfZfnNNEuA3nBS2jUjobG3BquTcCdZ7VB6 a6vLGIfAXHU2LSHirqnv6UJTHou9hlfClKO/UiDY= 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 6.18 203/869] crypto: hisilicon/hpre - fix pointer dereference before length check Date: Sat, 7 Nov 2026 08:48:05 -0500 Message-ID: <20261107134858.893070525@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@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 6.18-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 839c1f6771436..37d5f12e0ef1c 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