From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B3E693C1FCC; Thu, 15 Jan 2026 17:29:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498178; cv=none; b=qnL1HZEftTommlP7W+Cy58+dPaEiIrbP5dlPMC1Ea4s/DSzfXpyisvUdzUrGV9j/wOXGA8YFA2PFLsUXKj0TDquMBV0soOZH2hFBMqUsqB0pQIGuDuCZfMq/lhNX2xILQn3dL2qm3xhdjQz8jirAbwfwv+OC0mrPRrvreOqm6lU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768498178; c=relaxed/simple; bh=pygp8l5P2f/qM3za0y8rxaGsnH4UmijIPse72PIu+xk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=XNsccq1g5SPeuHii2ubWmZ717SoZtq5J2c6K2Yp2GxeXD21CJOlYf8lzVlebFk/iu6KqQNNDf1LWJnEYw0sNLdaGNVpRdEKpFecftpTtpQmILcwTHk31c8eaZ2BDgxtsS2Jqz7NcDma5aZqmWVH8H/wE544Y5d7O54Xg68tbFlA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=m0AcjdMM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="m0AcjdMM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 046B5C116D0; Thu, 15 Jan 2026 17:29:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1768498178; bh=pygp8l5P2f/qM3za0y8rxaGsnH4UmijIPse72PIu+xk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m0AcjdMMEC+M1rrXn/SKWnMKfHX6xV8+32Jpv33g1I2yZOSzJG6rpJOdBjFmjB658 vwBFPBnnyqcp2siQn/K6ModeRSbRInag9elehTIeXltDT0uRjQn72/dblfaMbsEKb9 KpBeYoEgxbMaBrKpxa5xuaQEQcEcQSZ3LuCAJGsk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xiumei Mu , Xin Long , Herbert Xu , Sasha Levin Subject: [PATCH 5.15 340/554] crypto: seqiv - Do not use req->iv after crypto_aead_encrypt Date: Thu, 15 Jan 2026 17:46:46 +0100 Message-ID: <20260115164258.538133082@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260115164246.225995385@linuxfoundation.org> References: <20260115164246.225995385@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Herbert Xu [ Upstream commit 50fdb78b7c0bcc550910ef69c0984e751cac72fa ] As soon as crypto_aead_encrypt is called, the underlying request may be freed by an asynchronous completion. Thus dereferencing req->iv after it returns is invalid. Instead of checking req->iv against info, create a new variable unaligned_info and use it for that purpose instead. Fixes: 0a270321dbf9 ("[CRYPTO] seqiv: Add Sequence Number IV Generator") Reported-by: Xiumei Mu Reported-by: Xin Long Signed-off-by: Herbert Xu Signed-off-by: Sasha Levin --- crypto/seqiv.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/crypto/seqiv.c b/crypto/seqiv.c index b1bcfe537daf..562ab102226a 100644 --- a/crypto/seqiv.c +++ b/crypto/seqiv.c @@ -51,6 +51,7 @@ static int seqiv_aead_encrypt(struct aead_request *req) struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv); struct aead_request *subreq = aead_request_ctx(req); crypto_completion_t compl; + bool unaligned_info; void *data; u8 *info; unsigned int ivsize = 8; @@ -80,8 +81,9 @@ static int seqiv_aead_encrypt(struct aead_request *req) return err; } - if (unlikely(!IS_ALIGNED((unsigned long)info, - crypto_aead_alignmask(geniv) + 1))) { + unaligned_info = !IS_ALIGNED((unsigned long)info, + crypto_aead_alignmask(geniv) + 1); + if (unlikely(unaligned_info)) { info = kmemdup(req->iv, ivsize, req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC); @@ -101,7 +103,7 @@ static int seqiv_aead_encrypt(struct aead_request *req) scatterwalk_map_and_copy(info, req->dst, req->assoclen, ivsize, 1); err = crypto_aead_encrypt(subreq); - if (unlikely(info != req->iv)) + if (unlikely(unaligned_info)) seqiv_aead_encrypt_complete2(req, err); return err; } -- 2.51.0