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35 lines
1012 B
Diff
35 lines
1012 B
Diff
From: David Bauer <mail@david-bauer.net>
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Date: Thu, 30 Nov 2023 07:32:52 +0100
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Subject: [PATCH] mac80211: avoid crashing on invalid band info
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Frequent crashes have been observed on MT7916 based platforms. While the
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root of these crashes are currently unknown, they happen when decoding
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rate information of connected STAs in AP mode. The rate-information is
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associated with a band which is not available on the PHY.
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Check for this condition in order to avoid crashing the whole system.
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This patch should be removed once the roout cause has been found and
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fixed.
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Link: https://github.com/freifunk-gluon/gluon/issues/2980
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Signed-off-by: David Bauer <mail@david-bauer.net>
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---
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--- a/net/mac80211/sta_info.c
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+++ b/net/mac80211/sta_info.c
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@@ -2459,6 +2459,13 @@ static void sta_stats_decode_rate(struct
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sband = local->hw.wiphy->bands[band];
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+ if (!sband) {
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+ wiphy_warn(local->hw.wiphy,
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+ "Invalid band %d\n",
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+ band);
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+ break;
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+ }
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+
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if (WARN_ON_ONCE(!sband->bitrates))
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break;
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