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- From: David Bauer <mail@david-bauer.net>
- Date: Thu, 30 Nov 2023 07:32:52 +0100
- Subject: [PATCH] mac80211: avoid crashing on invalid band info
- Frequent crashes have been observed on MT7916 based platforms. While the
- root of these crashes are currently unknown, they happen when decoding
- rate information of connected STAs in AP mode. The rate-information is
- associated with a band which is not available on the PHY.
- Check for this condition in order to avoid crashing the whole system.
- This patch should be removed once the roout cause has been found and
- fixed.
- Link: https://github.com/freifunk-gluon/gluon/issues/2980
- Signed-off-by: David Bauer <mail@david-bauer.net>
- ---
- --- a/net/mac80211/sta_info.c
- +++ b/net/mac80211/sta_info.c
- @@ -2364,6 +2364,13 @@ static void sta_stats_decode_rate(struct
-
- sband = local->hw.wiphy->bands[band];
-
- + if (!sband) {
- + wiphy_warn(local->hw.wiphy,
- + "Invalid band %d\n",
- + band);
- + break;
- + }
- +
- if (WARN_ON_ONCE(!sband->bitrates))
- break;
-
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