wifi: libertas: reject short monitor TX frames

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In monitor mode, lbs_hard_start_xmit() casts skb->data to a
radiotap TX header, skips that header, and then copies the 802.11
destination address from offset 4 in the remaining frame.  The
generic length check only rejects zero-length and oversized skbs, so
a short monitor frame can be read past the end of the skb data.

Require enough bytes for the radiotap TX header and the destination
address field before using the monitor-mode header layout.

Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260704011140.37639-1-pengpeng@iscas.ac.cn
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

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Pengpeng Hou 2026-07-04 09:11:40 +08:00 • committed by Johannes Berg

parent 0a2581cbae

commit 13ff543e0b

1 changed files with 7 additions and 0 deletions

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7

drivers/net/wireless/marvell/libertas/tx.c

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