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staging: wilc1000: prevent some overflows in debugfs

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Add some limits here so we don't corrupt memory.

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 2015-06-04 11:59:34 +03:00 • committed by Greg Kroah-Hartman
commit 9ee81443b9
1 changed files with 6 additions and 0 deletions
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6
drivers/staging/wilc1000/wilc_debugfs.c
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@ -53,6 +53,9 @@ static ssize_t wilc_debug_level_write(struct file *filp, const char *buf, size_t
char buffer[128] = {};
int flag = 0;
if (count > sizeof(buffer))
return -EINVAL;
if (copy_from_user(buffer, buf, count)) {
return -EFAULT;
}
@ -99,6 +102,9 @@ static ssize_t wilc_debug_region_write(struct file *filp, const char *buf, size_
char buffer[128] = {};
int flag;
if (count > sizeof(buffer))
return -EINVAL;
if (copy_from_user(buffer, buf, count)) {
return -EFAULT;
}