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authorJason Conti <jason.conti@gmail.com>2011-04-07 21:09:57 +0200
committerJohn W. Linville <linville@tuxdriver.com>2011-04-08 13:06:30 -0400
commita6756da9eace8b4af73e9dea43f1fc2889224c94 (patch)
tree7f1ac79ad2de9f422119f45d723af9bf3eb7bd66 /drivers/net/wireless/p54/txrx.c
parent96f372c95d32f76fa2b0e035e0a6269234bfda09 (diff)
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/wireless/p54/txrx.c')
-rw-r--r--drivers/net/wireless/p54/txrx.c2
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;