[048/127] firewire: core: fix an information leak

[Greg KH]

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>

commit 137d9ebfdbaa45c01f9f0f6d5121ae6f1eb942bd upstream.

If a device exposes a sparsely populated configuration ROM,
firewire-core's sysfs interface and character device file interface
showed random data in the gaps between config ROM blocks.  Fix this by
zero-initialization of the config ROM reader's scratch buffer.

Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Cc: maximilian attems <max@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/firewire/core-device.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -463,6 +463,7 @@ static int read_bus_info_block(struct fw
 		return -ENOMEM;
 
 	stack = &rom[READ_BIB_ROM_SIZE];
+	memset(rom, 0, sizeof(*rom) * READ_BIB_ROM_SIZE);
 
 	device->max_speed = SCODE_100;
 


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