| 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 |
| @@ -2445,6 +2445,13 @@ 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; |
| |