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 B4F841EB9F1; Tue, 15 Oct 2024 12:10:30 +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=1728994230; cv=none; b=r8Zn3fgM76JqymbPdo1oBrWOJbvef7WJCR5rvD4LFZp9ZXJZuMrzqvEhHtqmdIP5NaajqCYrKxBSVKp87x0eGwKBt+oF2hTmIke7BCnMHG1kW3Gj5+sesHqJ5EiJFsbRrz7XYEXoW03W60pSNt41BZ1OGRJdjALAQ5xHPZEF7pY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728994230; c=relaxed/simple; bh=uWznmuF7ijsS7tmRoRUjrc4FcTCepXLgQ+pBXMDcl4Q=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sWlfayoJkh0ZqIgrQCfnOT5zDtkQtT83Fx+mZ/Gd50oXyVqamurXtIdGUmSlSd6I1Bcxdqlcw0BYY/v6AMAJB/TofkpeYHD10kPmufqjFaOEOyqG1wbNcNtCCO2I5krILFLdkN/AKJwSUvrPUPejcJ+mQit9ZYtZJGw4NiyU8Cg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Uwcu+nCp; 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="Uwcu+nCp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 241A4C4CEC6; Tue, 15 Oct 2024 12:10:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728994230; bh=uWznmuF7ijsS7tmRoRUjrc4FcTCepXLgQ+pBXMDcl4Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Uwcu+nCpYUfIwZTKT7nmIx45th9V2dkc/9so/EGgzPGRG2a9PuCtPrIKcMP4TkVQb wns+LZ4iy1/NvuYi1m8puzwGUEMDIlRd9ObGuYCR0aBj3xCwQdkQ3ZpmzOZL/XPrPK rs+8F50d/l08AeM22vczBZcc1uj8ecrroPMX/j/E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arkadiusz Kubalewski , Aleksandr Loktionov , Simon Horman , Rafal Romanowski , Tony Nguyen , Sasha Levin Subject: [PATCH 5.15 644/691] i40e: Fix macvlan leak by synchronizing access to mac_filter_hash Date: Tue, 15 Oct 2024 13:29:52 +0200 Message-ID: <20241015112505.885956139@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Aleksandr Loktionov [ Upstream commit dac6c7b3d33756d6ce09f00a96ea2ecd79fae9fb ] This patch addresses a macvlan leak issue in the i40e driver caused by concurrent access to vsi->mac_filter_hash. The leak occurs when multiple threads attempt to modify the mac_filter_hash simultaneously, leading to inconsistent state and potential memory leaks. To fix this, we now wrap the calls to i40e_del_mac_filter() and zeroing vf->default_lan_addr.addr with spin_lock/unlock_bh(&vsi->mac_filter_hash_lock), ensuring atomic operations and preventing concurrent access. Additionally, we add lockdep_assert_held(&vsi->mac_filter_hash_lock) in i40e_add_mac_filter() to help catch similar issues in the future. Reproduction steps: 1. Spawn VFs and configure port vlan on them. 2. Trigger concurrent macvlan operations (e.g., adding and deleting portvlan and/or mac filters). 3. Observe the potential memory leak and inconsistent state in the mac_filter_hash. This synchronization ensures the integrity of the mac_filter_hash and prevents the described leak. Fixes: fed0d9f13266 ("i40e: Fix VF's MAC Address change on VM") Reviewed-by: Arkadiusz Kubalewski Signed-off-by: Aleksandr Loktionov Reviewed-by: Simon Horman Tested-by: Rafal Romanowski Signed-off-by: Tony Nguyen Signed-off-by: Sasha Levin --- drivers/net/ethernet/intel/i40e/i40e_main.c | 1 + drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c | 2 ++ 2 files changed, 3 insertions(+) diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index da4022a211f62..c1f21713ab8d1 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -1712,6 +1712,7 @@ struct i40e_mac_filter *i40e_add_mac_filter(struct i40e_vsi *vsi, struct hlist_node *h; int bkt; + lockdep_assert_held(&vsi->mac_filter_hash_lock); if (vsi->info.pvid) return i40e_add_filter(vsi, macaddr, le16_to_cpu(vsi->info.pvid)); diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c index d1635df17e46f..65a29f955d9c4 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c +++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c @@ -2215,8 +2215,10 @@ static int i40e_vc_get_vf_resources_msg(struct i40e_vf *vf, u8 *msg) vfres->vsi_res[0].qset_handle = le16_to_cpu(vsi->info.qs_handle[0]); if (!(vf->driver_caps & VIRTCHNL_VF_OFFLOAD_USO) && !vf->pf_set_mac) { + spin_lock_bh(&vsi->mac_filter_hash_lock); i40e_del_mac_filter(vsi, vf->default_lan_addr.addr); eth_zero_addr(vf->default_lan_addr.addr); + spin_unlock_bh(&vsi->mac_filter_hash_lock); } ether_addr_copy(vfres->vsi_res[0].default_mac_addr, vf->default_lan_addr.addr); -- 2.43.0