diff --git a/package/kernel/mac80211/patches/subsys/780-avoid-crashing-missing-band.patch b/package/kernel/mac80211/patches/subsys/780-avoid-crashing-missing-band.patch new file mode 100644 index 000000000..2bc11efd0 --- /dev/null +++ b/package/kernel/mac80211/patches/subsys/780-avoid-crashing-missing-band.patch @@ -0,0 +1,34 @@ +From: David Bauer +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 +--- + +--- a/net/mac80211/sta_info.c ++++ b/net/mac80211/sta_info.c +@@ -2422,6 +2422,13 @@ 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; +