From a23ace5f226aea6c8ba04794720502b1aad1dd92 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 19 Dec 2007 22:24:16 -0500 Subject: [PATCH] airo: sanitize handling of StatsRid Signed-off-by: Al Viro Signed-off-by: John W. Linville --- drivers/net/wireless/airo.c | 78 ++++++++++++++++++++----------------- 1 file changed, 42 insertions(+), 36 deletions(-) diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index 8eac7fb4521..9b0714cea75 100644 --- 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*44096) { 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) -- 2.20.1