diff options
| author | Roel Kluin <roel.kluin@gmail.com> | 2009-07-25 23:02:32 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-07-27 15:19:36 -0400 |
| commit | 3d0ccd021b23c18ea2d399fe4a43c955485c765c (patch) | |
| tree | 9d82b6a49f8cb290adfdddb7d7e43fe1ad64135f /drivers/net | |
| parent | 2a21f86917f7a9fe13b180e895a816871a234dee (diff) | |
| download | lwn-3d0ccd021b23c18ea2d399fe4a43c955485c765c.tar.gz lwn-3d0ccd021b23c18ea2d399fe4a43c955485c765c.zip | |
airo: Buffer overflow
SSID_rid has space for only 3 ssids.
txPowerLevels[i] is read before the bounds check for i
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/airo.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index c70604f0329e..8ce5e4cee168 100644 --- a/drivers/net/wireless/airo.c +++ b/drivers/net/wireless/airo.c @@ -5918,20 +5918,19 @@ static int airo_set_essid(struct net_device *dev, readSsidRid(local, &SSID_rid); /* Check if we asked for `any' */ - if(dwrq->flags == 0) { + if (dwrq->flags == 0) { /* Just send an empty SSID list */ memset(&SSID_rid, 0, sizeof(SSID_rid)); } else { - int index = (dwrq->flags & IW_ENCODE_INDEX) - 1; + unsigned index = (dwrq->flags & IW_ENCODE_INDEX) - 1; /* Check the size of the string */ - if(dwrq->length > IW_ESSID_MAX_SIZE) { + if (dwrq->length > IW_ESSID_MAX_SIZE) return -E2BIG ; - } + /* Check if index is valid */ - if((index < 0) || (index >= 4)) { + if (index >= ARRAY_SIZE(SSID_rid.ssids)) return -EINVAL; - } /* Set the SSID */ memset(SSID_rid.ssids[index].ssid, 0, @@ -6819,7 +6818,7 @@ static int airo_set_txpow(struct net_device *dev, return -EINVAL; } clear_bit (FLAG_RADIO_OFF, &local->flags); - for (i = 0; cap_rid.txPowerLevels[i] && (i < 8); i++) + for (i = 0; i < 8 && cap_rid.txPowerLevels[i]; i++) if (v == cap_rid.txPowerLevels[i]) { readConfigRid(local, 1); local->config.txPower = v; |