From: Florin Malita Date: Tue, 10 Oct 2006 20:46:30 +0000 (-0400) Subject: [PATCH] airo.c: check returned values X-Git-Tag: v2.6.19-rc3~13^2~1^2~6 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=431aca5a18f15f61cc51c466073928c4f9565fe4;p=linux-2.6 [PATCH] airo.c: check returned values create_proc_entry() can fail and return NULL in setup_proc_entry(), the result must be checked before dereferencing. (Coverity ID 1443) init_wifidev() & setup_proc_entry() can also fail in _init_airo_card(). This adds the checks & cleanup code and removes some whitespace. Signed-off-by: Florin Malita Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c index 0a33c8a56e..9d5427a6e6 100644 --- a/drivers/net/wireless/airo.c +++ b/drivers/net/wireless/airo.c @@ -2897,6 +2897,8 @@ static struct net_device *_init_airo_card( unsigned short irq, int port, goto err_out_map; } ai->wifidev = init_wifidev(ai, dev); + if (!ai->wifidev) + goto err_out_reg; set_bit(FLAG_REGISTERED,&ai->flags); airo_print_info(dev->name, "MAC enabled %x:%x:%x:%x:%x:%x", @@ -2908,11 +2910,18 @@ static struct net_device *_init_airo_card( unsigned short irq, int port, for( i = 0; i < MAX_FIDS; i++ ) ai->fids[i] = transmit_allocate(ai,AIRO_DEF_MTU,i>=MAX_FIDS/2); - setup_proc_entry( dev, dev->priv ); /* XXX check for failure */ + if (setup_proc_entry(dev, dev->priv) < 0) + goto err_out_wifi; + netif_start_queue(dev); SET_MODULE_OWNER(dev); return dev; +err_out_wifi: + unregister_netdev(ai->wifidev); + free_netdev(ai->wifidev); +err_out_reg: + unregister_netdev(dev); err_out_map: if (test_bit(FLAG_MPI,&ai->flags) && pci) { pci_free_consistent(pci, PCI_SHARED_LEN, ai->shared, ai->shared_dma); @@ -4495,91 +4504,128 @@ static int setup_proc_entry( struct net_device *dev, apriv->proc_entry = create_proc_entry(apriv->proc_name, S_IFDIR|airo_perm, airo_entry); - apriv->proc_entry->uid = proc_uid; - apriv->proc_entry->gid = proc_gid; - apriv->proc_entry->owner = THIS_MODULE; + if (!apriv->proc_entry) + goto fail; + apriv->proc_entry->uid = proc_uid; + apriv->proc_entry->gid = proc_gid; + apriv->proc_entry->owner = THIS_MODULE; /* Setup the StatsDelta */ entry = create_proc_entry("StatsDelta", S_IFREG | (S_IRUGO&proc_perm), apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_stats_delta; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_statsdelta_ops); /* Setup the Stats */ entry = create_proc_entry("Stats", S_IFREG | (S_IRUGO&proc_perm), apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_stats; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_stats_ops); /* Setup the Status */ entry = create_proc_entry("Status", S_IFREG | (S_IRUGO&proc_perm), apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_status; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_status_ops); /* Setup the Config */ entry = create_proc_entry("Config", S_IFREG | proc_perm, apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_config; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_config_ops); /* Setup the SSID */ entry = create_proc_entry("SSID", S_IFREG | proc_perm, apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_ssid; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_SSID_ops); /* Setup the APList */ entry = create_proc_entry("APList", S_IFREG | proc_perm, apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_aplist; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_APList_ops); /* Setup the BSSList */ entry = create_proc_entry("BSSList", S_IFREG | proc_perm, apriv->proc_entry); + if (!entry) + goto fail_bsslist; entry->uid = proc_uid; entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_BSSList_ops); /* Setup the WepKey */ entry = create_proc_entry("WepKey", S_IFREG | proc_perm, apriv->proc_entry); - entry->uid = proc_uid; - entry->gid = proc_gid; + if (!entry) + goto fail_wepkey; + entry->uid = proc_uid; + entry->gid = proc_gid; entry->data = dev; - entry->owner = THIS_MODULE; + entry->owner = THIS_MODULE; SETPROC_OPS(entry, proc_wepkey_ops); return 0; + +fail_wepkey: + remove_proc_entry("BSSList", apriv->proc_entry); +fail_bsslist: + remove_proc_entry("APList", apriv->proc_entry); +fail_aplist: + remove_proc_entry("SSID", apriv->proc_entry); +fail_ssid: + remove_proc_entry("Config", apriv->proc_entry); +fail_config: + remove_proc_entry("Status", apriv->proc_entry); +fail_status: + remove_proc_entry("Stats", apriv->proc_entry); +fail_stats: + remove_proc_entry("StatsDelta", apriv->proc_entry); +fail_stats_delta: + remove_proc_entry(apriv->proc_name, airo_entry); +fail: + return -ENOMEM; } static int takedown_proc_entry( struct net_device *dev,