CVE-2024-47724

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

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3	Patch
https://git.kernel.org/stable/c/6db232905e094e64abff1f18249905d068285e09	Patch
https://git.kernel.org/stable/c/dbd51da69dda1137723b8f66460bf99a9dac8dd2	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

23 Oct 2024, 21:41

Type	Values Removed	Values Added
First Time		Linux linux Kernel Linux
References	~~() https://git.kernel.org/stable/c/177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3 -~~	() https://git.kernel.org/stable/c/177b49dbf9c1d8f9f25a22ffafa416fc2c8aa6a3 - Patch
References	~~() https://git.kernel.org/stable/c/6db232905e094e64abff1f18249905d068285e09 -~~	() https://git.kernel.org/stable/c/6db232905e094e64abff1f18249905d068285e09 - Patch
References	~~() https://git.kernel.org/stable/c/dbd51da69dda1137723b8f66460bf99a9dac8dd2 -~~	() https://git.kernel.org/stable/c/dbd51da69dda1137723b8f66460bf99a9dac8dd2 - Patch
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: wifi: ath11k: usar cola de trabajo para procesar evento beacon tx el commit 3a415daa3e8b ("wifi: ath11k: agregar P2P IE en plantilla beacon") del 28 de febrero de 2024 (linux-next) genera la siguiente advertencia del verificador estático de Smatch: drivers/net/wireless/ath/ath11k/wmi.c:1742 ath11k_wmi_p2p_go_bcn_ie() warn: durmiendo en contexto atómico La razón es que ath11k_bcn_tx_status_event() llamará directamente a la función de suspensión ath11k_wmi_cmd_send() durante las secciones críticas del lado de lectura de RCU. El seguimiento de la llamada es así: 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() el commit 886433a98425 ("ath11k: agregar soporte para cambio de color BSS") agregó ath11k_mac_bcn_tx_event(), el commit 01e782c89108 ("ath11k: corregir advertencia de uso de RCU para ath11k_mac_get_arvif_by_vdev_id()") agregó el bloqueo de RCU para evitar advertencias pero también introdujo este ERROR. Utilice la cola de trabajo para evitar llamar directamente a ath11k_mac_bcn_tx_event() durante las secciones críticas de RCU. No es necesario preocuparse por la eliminación de vif porque cancel_work_sync() descartará el trabajo si no comienza o bloqueará la eliminación de vif hasta que finalice el trabajo en ejecución. Probado en: WCN6855 hw2.0 PCI WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.30
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:o:linux:linux_kernel::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5

21 Oct 2024, 13:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-10-21 13:15

Updated : 2024-10-23 21:41

NVD link : CVE-2024-47724

Mitre link : CVE-2024-47724

CVE.ORG link : CVE-2024-47724

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

5.5 /10