mac80211_hwsim: drop pending frames on stop

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Syzbot reports that we may be able to get into a situation where
mac80211 has pending ACK frames on shutdown with hwsim. It appears
that the reason for this is that syzbot uses the wmediumd hooks to
intercept/injection frames, and may shut down hwsim, removing the
radio(s), while frames are pending in the air simulation.

Clean out the pending queue when the interface is stopped, after
this the frames can't be reported back to mac80211 properly anyway.

Reported-by: syzbot+a063bbf0b15737362592@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20210517170429.b0f85ab0eda1.Ie42a6ec6b940c971f3441286aeaaae2fe368e29a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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This commit is contained in:

Johannes Berg 2021-05-17 17:04:31 +02:00

parent 0ee4d55534

commit bd18de5179

1 changed files with 5 additions and 0 deletions

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drivers/net/wireless/mac80211_hwsim.c

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