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| author | Johannes Berg <johannes.berg@intel.com> | 2026-09-04 16:55:08 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2026-09-09 14:51:27 +0200 |
| commit | f4e72e3758072d7b063e0d8b93419eb915b69c2c (patch) | |
| tree | 8b217018907092be84b4542ce223e3823ae0153c /tools/perf/scripts/python/stackcollapse.py | |
| parent | 17a5f8571d1d40c88b78cfc154a7da0d60f13f37 (diff) | |
wifi: cfg80211: reduce RTNL holding in regulatory enforcement
Regulatory enforcement in reg_check_chans_work() does all work
with the RTNL held, which can block the RTNL for a long time,
which syzbot can hit and report hung tasks.
Except for NAN, we don't need the RTNL for the enforcement, and
the list iteration can be done with RCU instead.
Split the enforcement off into new work structs: for NAN, we
have to have the RTNL to close dependent NAN_DATA interfaces,
everything else can use cfg80211_leave_locked() in a wiphy work.
It'd be doable to use just a single work with RTNL, but then
the RTNL would end up being used all the time, and really it
only needs to be used for NAN.
Assisted-by: LLM
Reported-by: syzbot+adeb8550754921fece20@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=adeb8550754921fece20
Reported-by: syzbot+101224300649c3eb8af4@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=101224300649c3eb8af4
Link: https://patch.msgid.link/20260904165614.f65bd4d9fa35.I82dac71371d87f39e459fce931b0e5321e4f9767@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions