wifi: mac80211_hwsim: clear PMSR request state on abort

mac80211_hwsim saves the in-flight cfg80211 PMSR request and its wdev
in data->pmsr_request / data->pmsr_request_wdev when a measurement
starts, and clears them only when it reports completion.

mac80211_hwsim_abort_pmsr() never cleared that saved state. cfg80211
owns the request and frees it once the abort callback returns
(cfg80211_pmsr_process_abort() calls rdev_abort_pmsr() then
kfree(req)), so after an abort data->pmsr_request dangles. A later
hwsim PMSR report then dereferences the freed request in
hwsim_pmsr_report_nl() and completes it; a use-after-free.

Clear data->pmsr_request and data->pmsr_request_wdev once the abort
matches the active request. Move the wmediumd/virtio notification check
below the clear so the saved state is dropped even when no notification
is sent.

Assisted-by: Codex:gpt-5
Assisted-by: Claude:opus-4.8
Signed-off-by: Zhao Li <enderaoelyther@gmail.com>
Link: https://patch.msgid.link/20260708195911.84365-2-enderaoelyther@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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