This is a note to let you know that I've just added the patch titled brcmfmac: Add check for short event packets to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: brcmfmac-add-check-for-short-event-packets.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From dd2349121bb1b8ff688c3ca6a2a0bea9d8c142ca Mon Sep 17 00:00:00 2001 From: Kevin Cernekee <cernekee@xxxxxxxxxxxx> Date: Sat, 16 Sep 2017 21:08:24 -0700 Subject: brcmfmac: Add check for short event packets From: Kevin Cernekee <cernekee@xxxxxxxxxxxx> commit dd2349121bb1b8ff688c3ca6a2a0bea9d8c142ca 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@xxxxxxxxxxxx> Signed-off-by: Kevin Cernekee <cernekee@xxxxxxxxxxxx> Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fweh.c @@ -429,7 +429,8 @@ void brcmf_fweh_process_event(struct brc if (code != BRCMF_E_IF && !fweh->evt_handler[code]) return; - if (datalen > BRCMF_DCMD_MAXLEN) + if (datalen > BRCMF_DCMD_MAXLEN || + datalen + sizeof(*event_packet) > packet_len) return; if (in_interrupt()) Patches currently in stable-queue which might be from cernekee@xxxxxxxxxxxx are queue-4.13/brcmfmac-add-check-for-short-event-packets.patch