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| author | Jason Conti <jason.conti@gmail.com> | 2011-04-07 21:09:57 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-04-08 13:06:30 -0400 |
| commit | a6756da9eace8b4af73e9dea43f1fc2889224c94 (patch) | |
| tree | 7f1ac79ad2de9f422119f45d723af9bf3eb7bd66 /drivers/net | |
| parent | 96f372c95d32f76fa2b0e035e0a6269234bfda09 (diff) | |
| download | lwn-a6756da9eace8b4af73e9dea43f1fc2889224c94.tar.gz lwn-a6756da9eace8b4af73e9dea43f1fc2889224c94.zip | |
p54: Initialize extra_len in p54_tx_80211
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>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/p54/txrx.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c index 7834c26c2954..042842e704de 100644 --- a/drivers/net/wireless/p54/txrx.c +++ b/drivers/net/wireless/p54/txrx.c @@ -703,7 +703,7 @@ void p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb) struct p54_tx_info *p54info; struct p54_hdr *hdr; struct p54_tx_data *txhdr; - unsigned int padding, len, extra_len; + unsigned int padding, len, extra_len = 0; int i, j, ridx; u16 hdr_flags = 0, aid = 0; u8 rate, queue = 0, crypt_offset = 0; |