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usb: iowarrior: replace kmalloc with kmalloc_array

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A common flaw in the kernel is integer overflow during memory allocation
size calculations. In an effort to reduce the frequency of these bugs,
kmalloc_array was implemented, which allocates memory for an array,
while at the same time detects integer overflow.

This patch replaces cases of:

	kmalloc(a * b, gfp)

with:
	kmalloc_array(a, b, gfp)

Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gustavo A. R. Silva 2018-08-23 12:55:27 -05:00 committed by Greg Kroah-Hartman
parent 87f88dfcde
commit 23feefda22
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/misc/iowarrior.c
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@ -808,8 +808,8 @@ static int iowarrior_probe(struct usb_interface *interface,
dev->int_in_endpoint->bInterval);
/* create an internal buffer for interrupt data from the device */
dev->read_queue =
kmalloc(((dev->report_size + 1) * MAX_INTERRUPT_BUFFER),
GFP_KERNEL);
kmalloc_array(dev->report_size + 1, MAX_INTERRUPT_BUFFER,
GFP_KERNEL);
if (!dev->read_queue)
goto error;
/* Get the serial-number of the chip */