发布时间: 2024年10月12日
修改时间: 2024年10月14日
In the Linux kernel, the following vulnerability has been resolved:wifi: rtw88: usb: schedule rx work after everything is set upRight now it s possible to hit NULL pointer dereference inrtw_rx_fill_rx_status on hw object and/or its fields becauseinitialization routine can start getting USB replies beforertw_dev is fully setup.The stack trace looks like this:rtw_rx_fill_rx_statusrtw8821c_query_rx_descrtw_usb_rx_handler...queue_workrtw_usb_read_port_complete...usb_submit_urbrtw_usb_rx_resubmitrtw_usb_init_rxrtw_usb_probeSo while we do the async stuff rtw_usb_probe continues and callsrtw_register_hw, which does all kinds of initialization (e.g.via ieee80211_register_hw) that rtw_rx_fill_rx_status relies on.Fix this by moving the first usb_submit_urb after everythingis set up.For me, this bug manifested as:[ 8.893177] rtw_8821cu 1-1:1.2: band wrong, packet dropped[ 8.910904] rtw_8821cu 1-1:1.2: hw->conf.chandef.chan NULL in rtw_rx_fill_rx_statusbecause I m using Larry s backport of rtw88 driver with the NULLchecks in rtw_rx_fill_rx_status.
| NVD | openEuler | |
|---|---|---|
| Confidentiality | None | None |
| Attack Vector | Local | Local |
| CVSS评分 | 5.5 | 5.5 |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| Scope | Unchanged | Unchanged |
| Integrity | None | None |
| User Interaction | None | None |
| Availability | High | High |
| 公告名 | 概要 | 发布时间 |
|---|---|---|
| KylinSec-SA-2024-3915 | In the Linux kernel, the following vulnerability has been resolved:wifi: rtw88: usb: schedule rx work after everything is set upRight now it s possible to hit NULL pointer dereference inrtw_rx_fill_rx_status on hw object and/or its fields becauseinitialization routine can start getting USB replies beforertw_dev is fully setup.The stack trace looks like this:rtw_rx_fill_rx_statusrtw8821c_query_rx_descrtw_usb_rx_handler...queue_workrtw_usb_read_port_complete...usb_submit_urbrtw_usb_rx_resubmitrtw_usb_init_rxrtw_usb_probeSo while we do the async stuff rtw_usb_probe continues and callsrtw_register_hw, which does all kinds of initialization (e.g.via ieee80211_register_hw) that rtw_rx_fill_rx_status relies on.Fix this by moving the first usb_submit_urb after everythingis set up.For me, this bug manifested as:[ 8.893177] rtw_8821cu 1-1:1.2: band wrong, packet dropped[ 8.910904] rtw_8821cu 1-1:1.2: hw->conf.chandef.chan NULL in rtw_rx_fill_rx_statusbecause I m using Larry s backport of rtw88 driver with the NULLchecks in rtw_rx_fill_rx_status. | 2024年10月12日 |
| 产品 | 包 | 状态 |
|---|---|---|
| V6 | kernel | Fixed |
