wifi: mt76: mt7996: bound TLV walk in mt7996_mcu_get_chip_config

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The response TLV loop advanced by tlv->len without a minimum, so a
theoretical firmware response containing a zero-length TLV could spin
forever, hanging the CPU during device probe.
The u32 payload was also read without bounds checking.
Reject a short fixed field, stop on a TLV whose length underruns the
header or overruns the skb.

Fixes: 5d33053be6 ("wifi: mt76: mt7996: add variants support")
Link: https://patch.msgid.link/20260724124813.3961474-2-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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Felix Fietkau 2026-07-24 12:47:46 +00:00

parent cbeed70967

commit 44af52467e

1 changed files with 13 additions and 3 deletions

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16

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

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