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USB: usbtest: prevent a divide by zero bug

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If param->length is zero, then this could lead to a divide by zero bug
later in the function when we do: size %= max;

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2012-11-17 18:06:11 +03:00 committed by Greg Kroah-Hartman
parent fb4e98ab63
commit 564e69893c
1 changed files with 3 additions and 0 deletions
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3
drivers/usb/misc/usbtest.c
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@ -423,6 +423,9 @@ alloc_sglist(int nents, int max, int vary)
unsigned i;
unsigned size = max;
if (max == 0)
return NULL;
sg = kmalloc_array(nents, sizeof *sg, GFP_KERNEL);
if (!sg)
return NULL;