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drivers/net/wireless: need consider the not '\0' terminated string.

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in ray_cs.c:
    the a_current_ess_id is "Null terminated unless ESSID_SIZE long"
    so we need buffer it with '\0' firstly, before using strlen or %s.

  additional information:
    in drivers/net/wireless/rayctl.h:
      "NULL terminated unless 32 long" is a comment at line 616, 664
      ESSID_SIZE is 32, at line 190
    in include/uapi/linux/wireless.h:
      IW_ESSID_MAX_SIZE is also 32
    in drivers/net/wireless/ray_cs.c:
      use strncpy for it, without '\0' terminated, at line 639
      use memcpy for it, assume not '\0' terminated in line 1092..1097
      buffer it with '\0' firstly, before using %s, in line 2576, 2598..2600

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Chen Gang 2013-01-08 13:33:03 +08:00 committed by John W. Linville
parent 6aaacd8615
commit 708d019fd1
1 changed files with 14 additions and 5 deletions
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19
drivers/net/wireless/ray_cs.c
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@ -1107,12 +1107,15 @@ static int ray_get_essid(struct net_device *dev, struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
{
ray_dev_t *local = netdev_priv(dev);
UCHAR tmp[IW_ESSID_MAX_SIZE + 1];
/* Get the essid that was set */
memcpy(extra, local->sparm.b5.a_current_ess_id, IW_ESSID_MAX_SIZE);
memcpy(tmp, local->sparm.b5.a_current_ess_id, IW_ESSID_MAX_SIZE);
tmp[IW_ESSID_MAX_SIZE] = '\0';
/* Push it out ! */
wrqu->essid.length = strlen(extra);
wrqu->essid.length = strlen(tmp);
wrqu->essid.flags = 1; /* active */
return 0;
@ -1842,6 +1845,8 @@ static irqreturn_t ray_interrupt(int irq, void *dev_id)
UCHAR tmp;
UCHAR cmd;
UCHAR status;
UCHAR memtmp[ESSID_SIZE + 1];
if (dev == NULL) /* Note that we want interrupts with dev->start == 0 */
return IRQ_NONE;
@ -1901,17 +1906,21 @@ static irqreturn_t ray_interrupt(int irq, void *dev_id)
break;
case CCS_START_NETWORK:
case CCS_JOIN_NETWORK:
memcpy(memtmp, local->sparm.b4.a_current_ess_id,
ESSID_SIZE);
memtmp[ESSID_SIZE] = '\0';
if (status == CCS_COMMAND_COMPLETE) {
if (readb
(&pccs->var.start_network.net_initiated) ==
1) {
dev_dbg(&link->dev,
"ray_cs interrupt network \"%s\" started\n",
local->sparm.b4.a_current_ess_id);
memtmp);
} else {
dev_dbg(&link->dev,
"ray_cs interrupt network \"%s\" joined\n",
local->sparm.b4.a_current_ess_id);
memtmp);
}
memcpy_fromio(&local->bss_id,
pccs->var.start_network.bssid,
@ -1939,12 +1948,12 @@ static irqreturn_t ray_interrupt(int irq, void *dev_id)
if (status == CCS_START_NETWORK) {
dev_dbg(&link->dev,
"ray_cs interrupt network \"%s\" start failed\n",
local->sparm.b4.a_current_ess_id);
memtmp);
local->timer.function = start_net;
} else {
dev_dbg(&link->dev,
"ray_cs interrupt network \"%s\" join failed\n",
local->sparm.b4.a_current_ess_id);
memtmp);
local->timer.function = join_net;
}
add_timer(&local->timer);