Memleak in driver for the Specialix SX series cards.

From: Oleg Drokin (green@linuxhacker.ru)
Date: Wed Mar 12 2003 - 15:41:14 EST


Hello!

    I see there is a memleak in driver for the Specialix SX series cards
    on error exit path in sx_fw_ioctl() (both in 2.4 and 2.5).
    See the patch.
    Found with help of smatch + unfree script.

Bye,
    Oleg

===== drivers/char/sx.c 1.13 vs edited =====
--- 1.13/drivers/char/sx.c Fri Nov 8 21:16:55 2002
+++ edited/drivers/char/sx.c Wed Mar 12 23:38:33 2003
@@ -1734,8 +1734,10 @@
                                 if (copy_from_user(tmp, (char *)data + i,
                                                    (i + SX_CHUNK_SIZE >
                                                     nbytes) ? nbytes - i :
- SX_CHUNK_SIZE))
+ SX_CHUNK_SIZE)) {
+ kfree (tmp);
                                         return -EFAULT;
+ }
                                 memcpy_toio ((char *) (board->base2 + offset + i), tmp,
                                                 (i+SX_CHUNK_SIZE>nbytes)?nbytes-i:SX_CHUNK_SIZE);
                         }
-
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