| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47028: mt76: mt7915: fix txrate reporting |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mt76: mt7915: fix txrate reporting |
| |
| Properly check rate_info to fix unexpected reporting. |
| |
| [ 1215.161863] Call trace: |
| [ 1215.164307] cfg80211_calculate_bitrate+0x124/0x200 [cfg80211] |
| [ 1215.170139] ieee80211s_update_metric+0x80/0xc0 [mac80211] |
| [ 1215.175624] ieee80211_tx_status_ext+0x508/0x838 [mac80211] |
| [ 1215.181190] mt7915_mcu_get_rx_rate+0x28c/0x8d0 [mt7915e] |
| [ 1215.186580] mt7915_mac_tx_free+0x324/0x7c0 [mt7915e] |
| [ 1215.191623] mt7915_queue_rx_skb+0xa8/0xd0 [mt7915e] |
| [ 1215.196582] mt76_dma_cleanup+0x7b0/0x11d0 [mt76] |
| [ 1215.201276] __napi_poll+0x38/0xf8 |
| [ 1215.204668] napi_workfn+0x40/0x80 |
| [ 1215.208062] process_one_work+0x1fc/0x390 |
| [ 1215.212062] worker_thread+0x48/0x4d0 |
| [ 1215.215715] kthread+0x120/0x128 |
| [ 1215.218935] ret_from_fork+0x10/0x1c |
| |
| The Linux kernel CVE team has assigned CVE-2021-47028 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit e57b7901469fc0b021930b83a8094baaf3d81b09 and fixed in 5.11.21 with commit dfc8a71448c7d4fec38fb22bdc8a76d79c14b6da |
| Issue introduced in 5.8 with commit e57b7901469fc0b021930b83a8094baaf3d81b09 and fixed in 5.12.4 with commit 4bd926e5ca88eac4d95eacb806b229f8729bc62e |
| Issue introduced in 5.8 with commit e57b7901469fc0b021930b83a8094baaf3d81b09 and fixed in 5.13 with commit f43b941fd61003659a3f0e039595e5e525917aa8 |
| |
| 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-2021-47028 |
| 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/mt7915/mcu.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/dfc8a71448c7d4fec38fb22bdc8a76d79c14b6da |
| https://git.kernel.org/stable/c/4bd926e5ca88eac4d95eacb806b229f8729bc62e |
| https://git.kernel.org/stable/c/f43b941fd61003659a3f0e039595e5e525917aa8 |
