| 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-2021-47029: mt76: connac: fix kernel warning adding monitor interface |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mt76: connac: fix kernel warning adding monitor interface |
| |
| Fix the following kernel warning adding a monitor interface in |
| mt76_connac_mcu_uni_add_dev routine. |
| |
| [ 507.984882] ------------[ cut here ]------------ |
| [ 507.989515] WARNING: CPU: 1 PID: 3017 at mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] |
| [ 508.059379] CPU: 1 PID: 3017 Comm: ifconfig Not tainted 5.4.98 #0 |
| [ 508.065461] Hardware name: MT7622_MT7531 RFB (DT) |
| [ 508.070156] pstate: 80000005 (Nzcv daif -PAN -UAO) |
| [ 508.074939] pc : mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] |
| [ 508.081806] lr : mt7921_eeprom_init+0x1288/0x1cb8 [mt7921e] |
| [ 508.087367] sp : ffffffc013a33930 |
| [ 508.090671] x29: ffffffc013a33930 x28: ffffff801e628ac0 |
| [ 508.095973] x27: ffffff801c7f1200 x26: ffffff801c7eb008 |
| [ 508.101275] x25: ffffff801c7eaef0 x24: ffffff801d025610 |
| [ 508.106577] x23: ffffff801d022990 x22: ffffff801d024de8 |
| [ 508.111879] x21: ffffff801d0226a0 x20: ffffff801c7eaee8 |
| [ 508.117181] x19: ffffff801d0226a0 x18: 000000005d00b000 |
| [ 508.122482] x17: 00000000ffffffff x16: 0000000000000000 |
| [ 508.127785] x15: 0000000000000080 x14: ffffff801d704000 |
| [ 508.133087] x13: 0000000000000040 x12: 0000000000000002 |
| [ 508.138389] x11: 000000000000000c x10: 0000000000000000 |
| [ 508.143691] x9 : 0000000000000020 x8 : 0000000000000001 |
| [ 508.148992] x7 : 0000000000000000 x6 : 0000000000000000 |
| [ 508.154294] x5 : ffffff801c7eaee8 x4 : 0000000000000006 |
| [ 508.159596] x3 : 0000000000000001 x2 : 0000000000000000 |
| [ 508.164898] x1 : ffffff801c7eac08 x0 : ffffff801d0226a0 |
| [ 508.170200] Call trace: |
| [ 508.172640] mt76_connac_mcu_uni_add_dev+0x178/0x190 [mt76_connac_lib] |
| [ 508.179159] mt7921_eeprom_init+0x1288/0x1cb8 [mt7921e] |
| [ 508.184394] drv_add_interface+0x34/0x88 [mac80211] |
| [ 508.189271] ieee80211_add_virtual_monitor+0xe0/0xb48 [mac80211] |
| [ 508.195277] ieee80211_do_open+0x86c/0x918 [mac80211] |
| [ 508.200328] ieee80211_do_open+0x900/0x918 [mac80211] |
| [ 508.205372] __dev_open+0xcc/0x150 |
| [ 508.208763] __dev_change_flags+0x134/0x198 |
| [ 508.212937] dev_change_flags+0x20/0x60 |
| [ 508.216764] devinet_ioctl+0x3e8/0x748 |
| [ 508.220503] inet_ioctl+0x1e4/0x350 |
| [ 508.223983] sock_do_ioctl+0x48/0x2a0 |
| [ 508.227635] sock_ioctl+0x310/0x4f8 |
| [ 508.231116] do_vfs_ioctl+0xa4/0xac0 |
| [ 508.234681] ksys_ioctl+0x44/0x90 |
| [ 508.237985] __arm64_sys_ioctl+0x1c/0x48 |
| [ 508.241901] el0_svc_common.constprop.1+0x7c/0x100 |
| [ 508.246681] el0_svc_handler+0x18/0x20 |
| [ 508.250421] el0_svc+0x8/0x1c8 |
| [ 508.253465] ---[ end trace c7b90fee13d72c39 ]--- |
| [ 508.261278] ------------[ cut here ]------------ |
| |
| The Linux kernel CVE team has assigned CVE-2021-47029 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.12 with commit d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 and fixed in 5.12.4 with commit 2554b9cb4b5e097c6071ec3ed5bc7c665c477ca7 |
| Issue introduced in 5.12 with commit d0e274af2f2e44b9d496f5d2c0431fdd2ea76fb8 and fixed in 5.13 with commit c996f0346e40e3b1ac2ebaf0681df898fb157f60 |
| |
| 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-2021-47029 |
| 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/mt76_connac_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/2554b9cb4b5e097c6071ec3ed5bc7c665c477ca7 |
| https://git.kernel.org/stable/c/c996f0346e40e3b1ac2ebaf0681df898fb157f60 |
