CVE-2024-56607

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: fix atomic calls in ath12k_mac_op_set_bitrate_mask()

When I try to manually set bitrates:

iw wlan0 set bitrates legacy-2.4 1

I get sleeping from invalid context error, see below. Fix that by switching to

use recently introduced ieee80211_iterate_stations_mtx().

Do note that WCN6855 firmware is still crashing, I'm not sure if that firmware

even supports bitrate WMI commands and should we consider disabling

ath12k_mac_op_set_bitrate_mask() for WCN6855? But that's for another patch.

BUG: sleeping function called from invalid context at drivers/net/wireless/ath/ath12k/wmi.c:420

in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 2236, name: iw

preempt_count: 0, expected: 0

RCU nest depth: 1, expected: 0

3 locks held by iw/2236:

#0: ffffffffabc6f1d8 (cb_lock){++++}-{3:3}, at: genl_rcv+0x14/0x40

#1: ffff888138410810 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0x54d/0x800 [cfg80211]

#2: ffff

/// 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