airo: sanitize handling of StatsRid

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index 8eac7fb..9b0714c 100644 (file)
--- a/drivers/net/wireless/airo.c
+++ b/drivers/net/wireless/airo.c
@@ -706,9 +706,9 @@ typedef struct {
 } StatusRid;
 
 typedef struct {
-       u16 len;
-       u16 spacer;
-       u32 vals[100];
+       __le16 len;
+       __le16 spacer;
+       __le32 vals[100];
 } StatsRid;
 
 
@@ -1889,13 +1889,10 @@ static int readCapabilityRid(struct airo_info*ai, CapabilityRid *capr, int lock)
                *s = le16_to_cpu(*s);
        return rc;
 }
-static int readStatsRid(struct airo_info*ai, StatsRid *sr, int rid, int lock) {
-       int rc = PC4500_readrid(ai, rid, sr, sizeof(*sr), lock);
-       u32 *i;
 
-       sr->len = le16_to_cpu(sr->len);
-       for(i = &sr->vals[0]; i <= &sr->vals[99]; i++) *i = le32_to_cpu(*i);
-       return rc;
+static int readStatsRid(struct airo_info*ai, StatsRid *sr, int rid, int lock)
+{
+       return PC4500_readrid(ai, rid, sr, sizeof(*sr), lock);
 }
 
 static void try_auto_wep(struct airo_info *ai)
@@ -2260,9 +2257,10 @@ static int airo_start_xmit11(struct sk_buff *skb, struct net_device *dev) {
        return 0;
 }
 
-static void airo_read_stats(struct airo_info *ai) {
+static void airo_read_stats(struct airo_info *ai)
+{
        StatsRid stats_rid;
-       u32 *vals = stats_rid.vals;
+       __le32 *vals = stats_rid.vals;
 
        clear_bit(JOB_STATS, &ai->jobs);
        if (ai->power.event) {
@@ -2272,20 +2270,23 @@ static void airo_read_stats(struct airo_info *ai) {
        readStatsRid(ai, &stats_rid, RID_STATS, 0);
        up(&ai->sem);
 
-       ai->stats.rx_packets = vals[43] + vals[44] + vals[45];
-       ai->stats.tx_packets = vals[39] + vals[40] + vals[41];
-       ai->stats.rx_bytes = vals[92];
-       ai->stats.tx_bytes = vals[91];
-       ai->stats.rx_errors = vals[0] + vals[2] + vals[3] + vals[4];
-       ai->stats.tx_errors = vals[42] + ai->stats.tx_fifo_errors;
-       ai->stats.multicast = vals[43];
-       ai->stats.collisions = vals[89];
+       ai->stats.rx_packets = le32_to_cpu(vals[43]) + le32_to_cpu(vals[44]) +
+                              le32_to_cpu(vals[45]);
+       ai->stats.tx_packets = le32_to_cpu(vals[39]) + le32_to_cpu(vals[40]) +
+                              le32_to_cpu(vals[41]);
+       ai->stats.rx_bytes = le32_to_cpu(vals[92]);
+       ai->stats.tx_bytes = le32_to_cpu(vals[91]);
+       ai->stats.rx_errors = le32_to_cpu(vals[0]) + le32_to_cpu(vals[2]) +
+                             le32_to_cpu(vals[3]) + le32_to_cpu(vals[4]);
+       ai->stats.tx_errors = le32_to_cpu(vals[42]) + ai->stats.tx_fifo_errors;
+       ai->stats.multicast = le32_to_cpu(vals[43]);
+       ai->stats.collisions = le32_to_cpu(vals[89]);
 
        /* detailed rx_errors: */
-       ai->stats.rx_length_errors = vals[3];
-       ai->stats.rx_crc_errors = vals[4];
-       ai->stats.rx_frame_errors = vals[2];
-       ai->stats.rx_fifo_errors = vals[0];
+       ai->stats.rx_length_errors = le32_to_cpu(vals[3]);
+       ai->stats.rx_crc_errors = le32_to_cpu(vals[4]);
+       ai->stats.rx_frame_errors = le32_to_cpu(vals[2]);
+       ai->stats.rx_fifo_errors = le32_to_cpu(vals[0]);
 }
 
 static struct net_device_stats *airo_get_stats(struct net_device *dev)
@@ -4741,14 +4742,16 @@ static int proc_stats_open( struct inode *inode, struct file *file ) {
 
 static int proc_stats_rid_open( struct inode *inode,
                                struct file *file,
-                               u16 rid ) {
+                               u16 rid )
+{
        struct proc_data *data;
        struct proc_dir_entry *dp = PDE(inode);
        struct net_device *dev = dp->data;
        struct airo_info *apriv = dev->priv;
        StatsRid stats;
        int i, j;
-       u32 *vals = stats.vals;
+       __le32 *vals = stats.vals;
+       int len = le16_to_cpu(stats.len);
 
        if ((file->private_data = kzalloc(sizeof(struct proc_data ), GFP_KERNEL)) == NULL)
                return -ENOMEM;
@@ -4761,17 +4764,17 @@ static int proc_stats_rid_open( struct inode *inode,
        readStatsRid(apriv, &stats, rid, 1);
 
         j = 0;
-       for(i=0; statsLabels[i]!=(char *)-1 &&
-                   i*4<stats.len; i++){
+       for(i=0; statsLabels[i]!=(char *)-1 && i*4<len; i++) {
                if (!statsLabels[i]) continue;
                if (j+strlen(statsLabels[i])+16>4096) {
                        airo_print_warn(apriv->dev->name,
                               "Potentially disasterous buffer overflow averted!");
                        break;
                }
-               j+=sprintf(data->rbuffer+j, "%s: %u\n", statsLabels[i], vals[i]);
+               j+=sprintf(data->rbuffer+j, "%s: %u\n", statsLabels[i],
+                               le32_to_cpu(vals[i]));
        }
-       if (i*4>=stats.len){
+       if (i*4 >= len) {
                airo_print_warn(apriv->dev->name, "Got a short rid");
        }
        data->readlen = j;
@@ -7624,7 +7627,7 @@ static void airo_read_wireless_stats(struct airo_info *local)
        StatusRid status_rid;
        StatsRid stats_rid;
        CapabilityRid cap_rid;
-       u32 *vals = stats_rid.vals;
+       __le32 *vals = stats_rid.vals;
 
        /* Get stats out of the card */
        clear_bit(JOB_WSTATS, &local->jobs);
@@ -7659,12 +7662,15 @@ static void airo_read_wireless_stats(struct airo_info *local)
 
        /* Packets discarded in the wireless adapter due to wireless
         * specific problems */
-       local->wstats.discard.nwid = vals[56] + vals[57] + vals[58];/* SSID Mismatch */
-       local->wstats.discard.code = vals[6];/* RxWepErr */
-       local->wstats.discard.fragment = vals[30];
-       local->wstats.discard.retries = vals[10];
-       local->wstats.discard.misc = vals[1] + vals[32];
-       local->wstats.miss.beacon = vals[34];
+       local->wstats.discard.nwid = le32_to_cpu(vals[56]) +
+                                    le32_to_cpu(vals[57]) +
+                                    le32_to_cpu(vals[58]); /* SSID Mismatch */
+       local->wstats.discard.code = le32_to_cpu(vals[6]);/* RxWepErr */
+       local->wstats.discard.fragment = le32_to_cpu(vals[30]);
+       local->wstats.discard.retries = le32_to_cpu(vals[10]);
+       local->wstats.discard.misc = le32_to_cpu(vals[1]) +
+                                    le32_to_cpu(vals[32]);
+       local->wstats.miss.beacon = le32_to_cpu(vals[34]);
 }
 
 static struct iw_statistics *airo_get_wireless_stats(struct net_device *dev)