[PATCH] 2.2: cs89x0, fix more kmallocs unchecked

From: Arnaldo Carvalho de Melo (acme@conectiva.com.br)
Date: Sat Dec 23 2000 - 17:18:35 EST

  • Next message: Andrew Morton: "Re: Linux 2.2.19pre2"

    Alan,
            
            I talked with Russell in private and this patch fixes some issues
    with the previous one, included in 2.2.19-pre3, and it also checks for
    another kmalloc result in init_module.

            Another question, by what I saw the HAVE_DEVLIST thing is not used
    anymore (dunno if it ever was used), should we get rid of it in this and in
    some other old drivers?

    - Arnaldo

    --- linux-2.2.19-3/drivers/net/cs89x0.c Sat Dec 23 18:13:25 2000
    +++ linux-2.2.19-3.acme/drivers/net/cs89x0.c Sat Dec 23 20:08:24 2000
    @@ -28,11 +28,12 @@
                         
       Alan Cox : Removed 1.2 support, added 2.1 extra counters.
     
    - Arnaldo Melo : release resources on failure in cs89x0_probe1
    + Arnaldo Melo : release resources on failure in cs89x0_probe1 and
    + init_module
     */
     
     static char *version =
    -"cs89x0.c:v1.03 11/26/96 Russell Nelson <nelson@crynwr.com>\n";
    +"cs89x0.c:v1.04 11/26/96 Russell Nelson <nelson@crynwr.com>\n";
     
     /* ======================= configure the driver here ======================= */
     
    @@ -251,7 +252,6 @@
             struct net_local *lp;
             static unsigned version_printed = 0;
             int i;
    - char priv_alloced_here = 0;
             unsigned rev_type = 0;
             int eeprom_buff[CHKSUM_LEN];
     
    @@ -261,7 +261,6 @@
                     if (!dev->priv)
                             return -ENOMEM;
                     memset(dev->priv, 0, sizeof(struct net_local));
    - priv_alloced_here = 1;
             }
             lp = (struct net_local *)dev->priv;
     
    @@ -394,10 +393,8 @@
     
             printk("\n");
             return 0;
    -err: if (priv_alloced_here) {
    - kfree(dev->priv);
    - dev->priv = NULL;
    - }
    +err: kfree(dev->priv);
    + dev->priv = NULL;
             return -ENODEV;
     }
     
    @@ -1053,6 +1050,7 @@
     init_module(void)
     {
             struct net_local *lp;
    + int ret;
     
             net_debug = debug;
             dev_cs89x0.name = namespace;
    @@ -1060,6 +1058,8 @@
             dev_cs89x0.base_addr = io;
             dev_cs89x0.init = cs89x0_probe;
             dev_cs89x0.priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
    + if (!dev_cs89x0.priv)
    + return -ENOMEM;
             memset(dev_cs89x0.priv, 0, sizeof(struct net_local));
             lp = (struct net_local *)dev_cs89x0.priv;
     
    @@ -1076,16 +1076,21 @@
             if (duplex==-1)
                     lp->auto_neg_cnf = AUTO_NEG_ENABLE;
     
    + ret = -EPERM;
             if (io == 0) {
                     printk(KERN_NOTICE "cs89x0.c: Module autoprobing not allowed.\n");
                     printk(KERN_NOTICE "cs89x0.c: Append io=0xNNN\n");
    - return -EPERM;
    + goto err;
             }
    + ret = -ENXIO;
             if (register_netdev(&dev_cs89x0) != 0) {
                     printk(KERN_WARNING "cs89x0.c: No card found at 0x%x\n", io);
    - return -ENXIO;
    + goto err;
             }
             return 0;
    +err: kfree(dev_cs89x0.priv);
    + dev_cs89x0.priv = NULL;
    + return ret;
     }
     
     void
    -
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