p54: Initialize extra_len in p54_tx_80211

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This patch fixes a very serious off-by-one bug in
the driver, which could leave the device in an
unresponsive state.

The problem was that the extra_len variable [used to
reserve extra scratch buffer space for the firmware]
was left uninitialized. Because p54_assign_address
later needs the value to reserve additional space,
the resulting frame could be to big for the small
device's memory window and everything would
immediately come to a grinding halt.

Reference: https://bugs.launchpad.net/bugs/722185

Cc: <stable@kernel.org>
Acked-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: Jason Conti <jason.conti@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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Jason Conti 2011-04-07 21:09:57 +02:00 • committed by John W. Linville

parent 96f372c95d

commit a6756da9ea

1 changed files with 1 additions and 1 deletions

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drivers/net/wireless/p54/txrx.c

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