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wifi: nl80211: disallow setting special AP channel widths
[ Upstream commit 23daf1b4c9
]
Setting the AP channel width is meant for use with the normal
20/40/... MHz channel width progression, and switching around
in S1G or narrow channels isn't supported. Disallow that.
Reported-by: syzbot+bc0f5b92cc7091f45fb6@syzkaller.appspotmail.com
Link: https://msgid.link/20240515141600.d4a9590bfe32.I19a32d60097e81b527eafe6b0924f6c5fbb2dc45@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
c2775ae4d9
commit
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@ -3398,6 +3398,33 @@ static int __nl80211_set_channel(struct cfg80211_registered_device *rdev,
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if (chandef.chan != cur_chan)
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return -EBUSY;
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/* only allow this for regular channel widths */
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switch (wdev->links[link_id].ap.chandef.width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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case NL80211_CHAN_WIDTH_40:
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case NL80211_CHAN_WIDTH_80:
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case NL80211_CHAN_WIDTH_80P80:
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case NL80211_CHAN_WIDTH_160:
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case NL80211_CHAN_WIDTH_320:
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break;
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default:
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return -EINVAL;
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}
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switch (chandef.width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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case NL80211_CHAN_WIDTH_40:
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case NL80211_CHAN_WIDTH_80:
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case NL80211_CHAN_WIDTH_80P80:
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case NL80211_CHAN_WIDTH_160:
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case NL80211_CHAN_WIDTH_320:
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break;
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default:
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return -EINVAL;
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}
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result = rdev_set_ap_chanwidth(rdev, dev, link_id,
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&chandef);
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if (result)
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