Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: use work queue to process beacon tx event Commit 3a415daa3e8b ("wifi: ath11k: add P2P IE in beacon template") from Feb 28, 2024 (linux-next), leads to the following Smatch static checker warning: drivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie() warn: sleeping in atomic context The reason is that ath11k_bcn_tx_status_event() will directly call might sleep function ath11k_wmi_cmd_send() during RCU read-side critical sections. The call trace is like: ath11k_bcn_tx_status_event() -> rcu_read_lock() -> ath11k_mac_bcn_tx_event() -> ath11k_mac_setup_bcn_tmpl() …… -> ath11k_wmi_bcn_tmpl() -> ath11k_wmi_cmd_send() -> rcu_read_unlock() Commit 886433a98425 ("ath11k: add support for BSS color change") added the ath11k_mac_bcn_tx_event(), commit 01e782c89108 ("ath11k: fix warning of RCU usage for ath11k_mac_get_arvif_by_vdev_id()") added the RCU lock to avoid warning but also introduced this BUG. Use work queue to avoid directly calling ath11k_mac_bcn_tx_event() during RCU critical sections. No need to worry about the deletion of vif because cancel_work_sync() will drop the work if it doesn't start or block vif deletion until the running work is done. Tested-on: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 before dbd51da69dda1137723b8f66460bf99a9dac8dd2; affected 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 before 6db232905e094e64abff1f18249905d068285e09; affected 3a415daa3e8ba65f1cc976c172a5ab69bdc17e69 before 177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3 |
| Linux / Linux | affected 6.10; unaffected 0 before 6.10; unaffected 6.10.13 through 6.10.*; unaffected 6.11.2 through 6.11.*; unaffected 6.12 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/dbd51da69dda1137723b8f66460bf99a9dac8dd2
- https://git.kernel.org/stable/c/6db232905e094e64abff1f18249905d068285e09
- https://git.kernel.org/stable/c/177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3
ADP enrichment
No English description supplied.
No references supplied.