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rt2x00: Restrict firmware file lengths 

Add extra security to the drivers for firmware loading,
check the firmware file length before uploading it to
the hardware. Incorrect lengths might indicate a firmware
upgrade (which is not yet supported by the driver) or
otherwise incorrect firmware.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ivo van Doorn 2009-01-23 17:03:24 +01:00 committed by John W. Linville
parent 6ba265e9cc
commit 9752a7bd7f
2 changed files with 10 additions and 0 deletions
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5
drivers/net/wireless/rt2x00/rt61pci.c
View File

@ -1199,6 +1199,11 @@ static int rt61pci_load_firmware(struct rt2x00_dev *rt2x00dev, const void *data,
int i; int i;
u32 reg; u32 reg;
if (len != 8192) {
ERROR(rt2x00dev, "Invalid firmware file length (len=%zu)\n", len);
return -ENOENT;
}
/* /*
* Wait for stable hardware. * Wait for stable hardware.
*/ */

5
drivers/net/wireless/rt2x00/rt73usb.c
View File

@ -1085,6 +1085,11 @@ static int rt73usb_load_firmware(struct rt2x00_dev *rt2x00dev, const void *data,
int status; int status;
u32 reg; u32 reg;
if (len != 2048) {
ERROR(rt2x00dev, "Invalid firmware file length (len=%zu)\n", len);
return -ENOENT;
}
/* /*
* Wait for stable hardware. * Wait for stable hardware.
*/ */