CVE-2024-47724

/// Technical description

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 introduc

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References