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USB: cxacru: fix an bounds check warning

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This is a privileged operation so it doesn't matter much.  We use "tmp"
as an offset into an array.  If it were invalid we could read out of
bounds and trigger an oops if the memory is not mapped.  Plus it makes
static checkers complain.

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 2016-01-30 17:34:55 +03:00 committed by Greg Kroah-Hartman
parent 1b83349fdd
commit 46e3cafb01
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/atm/cxacru.c
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@ -476,6 +476,8 @@ static ssize_t cxacru_sysfs_store_adsl_config(struct device *dev,
return -EINVAL;
if (index < 0 || index > 0x7f)
return -EINVAL;
if (tmp < 0 || tmp > len - pos)
return -EINVAL;
pos += tmp;
/* skip trailing newline */