wifi: mt76: mt7996: Fix possible NULL pointer dereference in mt7996_mac_write_txwi_80211()

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For injected frames (e.g. via radiotap), mac80211 can pass
info->control.vif = NULL, as explicitly noted in struct ieee80211_tx_info.
Check vif pointer before executing ieee80211_vif_is_mld() in
mt7996_mac_write_txwi_80211 routine in order to avoid a possible NULL
pointer dereference.

Fixes: f0b0b239b8 ("wifi: mt76: mt7996: rework mt7996_mac_write_txwi() for MLO support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260531-mt7996_mac_write_txwi_80211-null-ptr-deref-v1-1-6dd38e1d3422@kernel.org
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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This commit is contained in:

Lorenzo Bianconi 2026-05-31 11:38:57 +02:00 • committed by Felix Fietkau

parent 831074096d

commit 61370e6674

1 changed files with 4 additions and 3 deletions

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drivers/net/wireless/mediatek/mt76/mt7996/mac.c

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