c640f7b937
Fixes potential issues when bringing an interface down and then up again Signed-off-by: Felix Fietkau <nbd@nbd.name>
30 lines
796 B
Diff
30 lines
796 B
Diff
From: Felix Fietkau <nbd@nbd.name>
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Date: Wed, 3 Jul 2024 12:10:01 +0200
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Subject: [PATCH] wifi: mac80211: clear vif drv_priv after calling
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remove_interface
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Avoid reusing stale driver data when an interface is brought down and up
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again. In order to avoid having to duplicate the memset in every single
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driver, do it here.
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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--- a/net/mac80211/iface.c
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+++ b/net/mac80211/iface.c
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@@ -684,8 +684,12 @@ static void ieee80211_do_stop(struct iee
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fallthrough;
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default:
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- if (going_down)
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- drv_remove_interface(local, sdata);
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+ if (!going_down)
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+ break;
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+ drv_remove_interface(local, sdata);
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+
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+ /* Clear private driver data to prevent reuse */
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+ memset(sdata->vif.drv_priv, 0, local->hw.vif_data_size);
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}
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ieee80211_recalc_ps(local);
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