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 7440870CDA; Mon, 8 Apr 2024 13:05:56 +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=1712581556; cv=none; b=HQxi4NrOphKKn6Dq8Ah7McXHGMMs36LK30d7PzgFRG6cVUrEHgQu8Vyvzj24O5HiEgSSvZgIU8R8E6FF/6AOVpcrsO1u1NndyPtgQQxKvSN5FMmBtpSqkbR+slEBXjQTEAA7RyB37MXxM0OieSkICEMliP3MNTexwDPQohUQBks= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712581556; c=relaxed/simple; bh=hPfvbC79unM+71FSeN1o1dJVocmzPPavMBHn7CRKMFw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=DxrcMRZD6v0D+xr1vDWSgG4KXaDhwXkT12OH4FtozSkIuzFTPwseKT/wTiwzieJJInIpImvD7omVZtzXIWZMjOp8DwEP2tPt2rb71WY6palXb9Fheoyaq93e0mvoDSZ7uAvMq2tsnK91DhqKgT4yMaICfsHMP7RWp6kxFtiRBag= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=xbEUwm4C; 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="xbEUwm4C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id F0A12C433F1; Mon, 8 Apr 2024 13:05:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712581556; bh=hPfvbC79unM+71FSeN1o1dJVocmzPPavMBHn7CRKMFw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xbEUwm4Ccj2Lcz306IJeIbCrnWJqY0pK9ZlcaZxNXE4RHPY+mqgGOIW2wbQ+d7U6q hi8HQ55avFWx9Mp55JDent1KApaczGOYFi/Pl/iTEL8nAI33V1Wdv+d/ajwk4g9b2Q CxXFCZcYIq1MofgdXFnpOTVHjTuHbdo4v7LvFmIk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Michal Kubiak , Przemek Kitszel , Shannon Nelson , Tony Nguyen , Sasha Levin , Pucha Himasekhar Reddy Subject: [PATCH 6.6 018/252] ixgbe: avoid sleeping allocation in ixgbe_ipsec_vf_add_sa() Date: Mon, 8 Apr 2024 14:55:17 +0200 Message-ID: <20240408125307.214783621@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240408125306.643546457@linuxfoundation.org> References: <20240408125306.643546457@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Przemek Kitszel [ Upstream commit aec806fb4afba5fe80b09e29351379a4292baa43 ] Change kzalloc() flags used in ixgbe_ipsec_vf_add_sa() to GFP_ATOMIC, to avoid sleeping in IRQ context. Dan Carpenter, with the help of Smatch, has found following issue: The patch eda0333ac293: "ixgbe: add VF IPsec management" from Aug 13, 2018 (linux-next), leads to the following Smatch static checker warning: drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c:917 ixgbe_ipsec_vf_add_sa() warn: sleeping in IRQ context The call tree that Smatch is worried about is: ixgbe_msix_other() <- IRQ handler -> ixgbe_msg_task() -> ixgbe_rcv_msg_from_vf() -> ixgbe_ipsec_vf_add_sa() Fixes: eda0333ac293 ("ixgbe: add VF IPsec management") Reported-by: Dan Carpenter Link: https://lore.kernel.org/intel-wired-lan/db31a0b0-4d9f-4e6b-aed8-88266eb5665c@moroto.mountain Reviewed-by: Michal Kubiak Signed-off-by: Przemek Kitszel Reviewed-by: Shannon Nelson Tested-by: Pucha Himasekhar Reddy (A Contingent worker at Intel) Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c index 13a6fca31004a..866024f2b9eeb 100644 --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c @@ -914,7 +914,13 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf) goto err_out; } - xs = kzalloc(sizeof(*xs), GFP_KERNEL); + algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1); + if (unlikely(!algo)) { + err = -ENOENT; + goto err_out; + } + + xs = kzalloc(sizeof(*xs), GFP_ATOMIC); if (unlikely(!xs)) { err = -ENOMEM; goto err_out; @@ -930,14 +936,8 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf) memcpy(&xs->id.daddr.a4, sam->addr, sizeof(xs->id.daddr.a4)); xs->xso.dev = adapter->netdev; - algo = xfrm_aead_get_byname(aes_gcm_name, IXGBE_IPSEC_AUTH_BITS, 1); - if (unlikely(!algo)) { - err = -ENOENT; - goto err_xs; - } - aead_len = sizeof(*xs->aead) + IXGBE_IPSEC_KEY_BITS / 8; - xs->aead = kzalloc(aead_len, GFP_KERNEL); + xs->aead = kzalloc(aead_len, GFP_ATOMIC); if (unlikely(!xs->aead)) { err = -ENOMEM; goto err_xs; -- 2.43.0