In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: pause TCM when the firmware is stopped
Not doing so will make us send a host command to the transport while the firmware is not alive, which will trigger a WARNING.
bad state = 0 WARNING: CPU: 2 PID: 17434 at drivers/net/wireless/intel/iwlwifi/iwl-trans.c:115 iwltranssendcmd+0x1cb/0x1e0 [iwlwifi] RIP: 0010:iwltranssendcmd+0x1cb/0x1e0 [iwlwifi] Call Trace: <TASK> iwlmvmsendcmd+0x40/0xc0 [iwlmvm] iwlmvmconfigscan+0x198/0x260 [iwlmvm] iwlmvmrecalctcm+0x730/0x11d0 [iwlmvm] iwlmvmtcmwork+0x1d/0x30 [iwlmvm] processonework+0x29e/0x640 workerthread+0x2df/0x690 ? rescuerthread+0x540/0x540 kthread+0x192/0x1e0 ? setkthreadstruct+0x90/0x90 retfromfork+0x22/0x30