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 9F56D20D513 for ; Wed, 26 Feb 2025 02:13:01 +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=1740535981; cv=none; b=aXuQeXW3uhGF3bFRdu33UFKRk7lDFLsR8Hz4nfHqV1ITj42ZP6ZtSzbT/InnXltr3QCW/pZI4qSNrEDbqvYz5oLCrH2qO7EJU6Kaahb0CBflVRib4gOEVe2V64kaXu6rg0ae1zV4WRN9H+fIu8YBBVOPdOJ7ZZg5wHmOit+bvIM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740535981; c=relaxed/simple; bh=vNU73uFfaE63GUTmvl83/DIDhcYN3tymmquZYn7dCz4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ImXo9WHpn3IKc7rKW0wiZvPd5dPP/QtlknZcMv8yqwThswTmcKDnFG5fyx2UhfDujhoo0vgztDaDWcnra076b/RQsUWRTs2RaoZ6b5LheQEU2i8z4c+JBXKRMT3eDoGnmieqUwiR3SzmKShaaovXniQlgkqrguXVraP+2W+hBWA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=PGw4fs8l; 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="PGw4fs8l" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1DDEAC4CEDD; Wed, 26 Feb 2025 02:13:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1740535981; bh=vNU73uFfaE63GUTmvl83/DIDhcYN3tymmquZYn7dCz4=; h=From:To:Cc:Subject:Date:Reply-to:From; b=PGw4fs8liAuLaTkMAxAhLfAbr2PFMps1hWyASw/N1j9ceRVKj398kEyLXVN2z5Yfx yZejp4vwjS7wj7iQurr/8ZiXIh0+dh2jNNyv0NXjGyq4oICTQWfwP0e6mv0pCqPFEa AO/BWBz/raxRz2RhdYbXsBadPqd838XwighLqJ2I= From: Greg Kroah-Hartman To: linux-cve-announce@vger.kernel.org Cc: Greg Kroah-Hartman Subject: CVE-2022-49328: mt76: fix use-after-free by removing a non-RCU wcid pointer Date: Wed, 26 Feb 2025 03:10:02 +0100 Message-ID: <2025022638-CVE-2022-49328-ec2f@gregkh> X-Mailer: git-send-email 2.48.1 Precedence: bulk X-Mailing-List: linux-cve-announce@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Reply-to: , X-Developer-Signature: v=1; a=openpgp-sha256; l=7865; i=gregkh@linuxfoundation.org; h=from:subject:message-id; bh=vNU73uFfaE63GUTmvl83/DIDhcYN3tymmquZYn7dCz4=; b=owGbwMvMwCRo6H6F97bub03G02pJDOn7yh9fzrz63lphk66jX4P1p/Stx1t5G/xDl2zImJmSE LJPZnFIRywLgyATg6yYIsuXbTxH91ccUvQytD0NM4eVCWQIAxenAEzkmh3DgnWzv31y2TPnwzG9 aNlZtxRPnFdg02CYw/Pyt+PR4OBdH+OWalXsWFxkeHeDGgA= X-Developer-Key: i=gregkh@linuxfoundation.org; a=openpgp; fpr=F4B60CC5BF78C2214A313DCB3147D40DDB2DFB29 Content-Transfer-Encoding: 8bit Description =========== In the Linux kernel, the following vulnerability has been resolved: mt76: fix use-after-free by removing a non-RCU wcid pointer Fixes an issue caught by KASAN about use-after-free in mt76_txq_schedule by protecting mtxq->wcid with rcu_lock between mt76_txq_schedule and sta_info_[alloc, free]. [18853.876689] ================================================================== [18853.876751] BUG: KASAN: use-after-free in mt76_txq_schedule+0x204/0xaf8 [mt76] [18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883 [18853.876786] [18853.876810] CPU: 5 PID: 883 Comm: mt76-tx phy0 Not tainted 5.10.100-fix-510-56778d365941-kasan #5 0b01fbbcf41a530f52043508fec2e31a4215 [18853.876840] Call trace: [18853.876861] dump_backtrace+0x0/0x3ec [18853.876878] show_stack+0x20/0x2c [18853.876899] dump_stack+0x11c/0x1ac [18853.876918] print_address_description+0x74/0x514 [18853.876934] kasan_report+0x134/0x174 [18853.876948] __asan_report_load8_noabort+0x44/0x50 [18853.876976] mt76_txq_schedule+0x204/0xaf8 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877002] mt76_txq_schedule_all+0x2c/0x48 [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877030] mt7921_tx_worker+0xa0/0x1cc [mt7921_common f0875ebac9d7b4754e1010549e7db50fbd90a047] [18853.877054] __mt76_worker_fn+0x190/0x22c [mt76 074e03e4640e97fe7405ee1fab547b81c4fa45d2] [18853.877071] kthread+0x2f8/0x3b8 [18853.877087] ret_from_fork+0x10/0x30 [18853.877098] [18853.877112] Allocated by task 941: [18853.877131] kasan_save_stack+0x38/0x68 [18853.877147] __kasan_kmalloc+0xd4/0xfc [18853.877163] kasan_kmalloc+0x10/0x1c [18853.877177] __kmalloc+0x264/0x3c4 [18853.877294] sta_info_alloc+0x460/0xf88 [mac80211] [18853.877410] ieee80211_prep_connection+0x204/0x1ee0 [mac80211] [18853.877523] ieee80211_mgd_auth+0x6c4/0xa4c [mac80211] [18853.877635] ieee80211_auth+0x20/0x2c [mac80211] [18853.877733] rdev_auth+0x7c/0x438 [cfg80211] [18853.877826] cfg80211_mlme_auth+0x26c/0x390 [cfg80211] [18853.877919] nl80211_authenticate+0x6d4/0x904 [cfg80211] [18853.877938] genl_rcv_msg+0x748/0x93c [18853.877954] netlink_rcv_skb+0x160/0x2a8 [18853.877969] genl_rcv+0x3c/0x54 [18853.877985] netlink_unicast_kernel+0x104/0x1ec [18853.877999] netlink_unicast+0x178/0x268 [18853.878015] netlink_sendmsg+0x3cc/0x5f0 [18853.878030] sock_sendmsg+0xb4/0xd8 [18853.878043] ____sys_sendmsg+0x2f8/0x53c [18853.878058] ___sys_sendmsg+0xe8/0x150 [18853.878071] __sys_sendmsg+0xc4/0x1f4 [18853.878087] __arm64_compat_sys_sendmsg+0x88/0x9c [18853.878101] el0_svc_common+0x1b4/0x390 [18853.878115] do_el0_svc_compat+0x8c/0xdc [18853.878131] el0_svc_compat+0x10/0x1c [18853.878146] el0_sync_compat_handler+0xa8/0xcc [18853.878161] el0_sync_compat+0x188/0x1c0 [18853.878171] [18853.878183] Freed by task 10927: [18853.878200] kasan_save_stack+0x38/0x68 [18853.878215] kasan_set_track+0x28/0x3c [18853.878228] kasan_set_free_info+0x24/0x48 [18853.878244] __kasan_slab_free+0x11c/0x154 [18853.878259] kasan_slab_free+0x14/0x24 [18853.878273] slab_free_freelist_hook+0xac/0x1b0 [18853.878287] kfree+0x104/0x390 [18853.878402] sta_info_free+0x198/0x210 [mac80211] [18853.878515] __sta_info_destroy_part2+0x230/0x2d4 [mac80211] [18853.878628] __sta_info_flush+0x300/0x37c [mac80211] [18853.878740] ieee80211_set_disassoc+0x2cc/0xa7c [mac80211] [18853.878851] ieee80211_mgd_deauth+0x4a4/0x10a0 [mac80211] [18853.878962] ieee80211_deauth+0x20/0x2c [mac80211] [18853.879057] rdev_deauth+0x7c/0x438 [cfg80211] [18853.879150] cfg80211_mlme_deauth+0x274/0x414 [cfg80211] [18853.879243] cfg80211_mlme_down+0xe4/0x118 [cfg80211] [18853.879335] cfg80211_disconnect+0x218/0x2d8 [cfg80211] [18853.879427] __cfg80211_leave+0x17c/0x240 [cfg80211] [18853.879519] cfg80211_leave+0x3c/0x58 [cfg80211] [18853.879611] wiphy_suspend+0xdc/0x200 [cfg80211] [18853.879628] dpm_run_callback+0x58/0x408 [18853.879642] __device_suspend+0x4cc/0x864 [18853.879658] async_suspend+0x34/0xf4 [18853.879673] async_run_entry_fn+0xe0/0x37c [18853.879689] process_one_work+0x508/0xb98 [18853.879702] worker_thread+0x7f4/0xcd4 [18853.879717] kthread+0x2f8/0x3b8 [18853.879731] ret_from_fork+0x10/0x30 [18853.879741] [18853.879757] The buggy address belongs to the object at ffffffaf989a2000 [18853.879757] which belongs to the cache kmalloc-8k of size 8192 [18853.879774] The buggy address is located 312 bytes inside of [18853.879774] 8192-byte region [ffffffaf989a2000, ffffffaf989a4000) [18853.879787] The buggy address belongs to the page: [18853.879807] page:000000004bda2a59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d89a0 [18853.879823] head:000000004bda2a59 order:3 compound_mapcount:0 compound_pincount:0 [18853.879839] flags: 0x8000000000010200(slab|head) [18853.879857] raw: 8000000000010200 ffffffffbc89e208 ffffffffb7fb5208 ffffffaec000cc80 [18853.879873] raw: 0000000000000000 0000000000010001 00000001ffffffff 0000000000000000 [18853.879885] page dumped because: kasan: bad access detected [18853.879896] [18853.879907] Memory state around the buggy address: [18853.879922] ffffffaf989a2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [18853.879935] ffffffaf989a2080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [18853.879948] >ffffffaf989a2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [18853.879961] ^ [18853.879973] ffffffaf989a2180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [18853.879986] ffffffaf989a2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [18853.879998] ================================================================== The Linux kernel CVE team has assigned CVE-2022-49328 to this issue. Affected and fixed versions =========================== Fixed in 5.15.58 with commit 4448327b41738dbfcda680eb4935ff835568f468 Fixed in 5.17.14 with commit e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d Fixed in 5.18.3 with commit d5f77f1dbb59feae81f88e44551e8e1d8a802d9a Fixed in 5.19 with commit 51fb1278aa57ae0fc54adaa786e1965362bed4fb Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2022-49328 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/net/wireless/mediatek/mt76/mac80211.c drivers/net/wireless/mediatek/mt76/mt76.h drivers/net/wireless/mediatek/mt76/mt7603/main.c drivers/net/wireless/mediatek/mt76/mt7615/main.c drivers/net/wireless/mediatek/mt76/mt76x02_util.c drivers/net/wireless/mediatek/mt76/mt7915/main.c drivers/net/wireless/mediatek/mt76/mt7921/main.c drivers/net/wireless/mediatek/mt76/tx.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/4448327b41738dbfcda680eb4935ff835568f468 https://git.kernel.org/stable/c/e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d https://git.kernel.org/stable/c/d5f77f1dbb59feae81f88e44551e8e1d8a802d9a https://git.kernel.org/stable/c/51fb1278aa57ae0fc54adaa786e1965362bed4fb