brcmfmac: Add check for short event packets

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commit dd2349121b upstream.

The length of the data in the received skb is currently passed into
brcmf_fweh_process_event() as packet_len, but this value is not checked.
event_packet should be followed by DATALEN bytes of additional event
data.  Ensure that the received packet actually contains at least
DATALEN bytes of additional data, to avoid copying uninitialized memory
into event->data.

Suggested-by: Mattias Nissler <mnissler@chromium.org>
Signed-off-by: Kevin Cernekee <cernekee@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

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Kevin Cernekee 2017-09-16 21:08:24 -07:00 • committed by Ben Hutchings

parent f714e62505

commit e37cf5e2e1

1 changed files with 2 additions and 1 deletions

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drivers/net/wireless/brcm80211/brcmfmac/fweh.c

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