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staging/bcm: two information leaks in ioctl

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There are a couple paths where we don't check how much data we copy back
to the user.

Cc: Dave Jones <davej@redhat.com>
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 2014-02-17 22:56:06 +03:00 committed by Greg Kroah-Hartman
parent 4e5e9d7c66
commit cfff3e5c8d
1 changed files with 4 additions and 0 deletions
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4
drivers/staging/bcm/Bcmchar.c
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@ -590,6 +590,8 @@ static int bcm_char_ioctl_gpio_multi_request(void __user *argp, struct bcm_mini_
if (IoBuffer.InputLength > sizeof(gpio_multi_info))
return -EINVAL;
if (IoBuffer.OutputLength > sizeof(gpio_multi_info))
IoBuffer.OutputLength = sizeof(gpio_multi_info);
if (copy_from_user(&gpio_multi_info, IoBuffer.InputBuffer, IoBuffer.InputLength))
return -EFAULT;
@ -680,6 +682,8 @@ static int bcm_char_ioctl_gpio_mode_request(void __user *argp, struct bcm_mini_a
if (IoBuffer.InputLength > sizeof(gpio_multi_mode))
return -EINVAL;
if (IoBuffer.OutputLength > sizeof(gpio_multi_mode))
IoBuffer.OutputLength = sizeof(gpio_multi_mode);
if (copy_from_user(&gpio_multi_mode, IoBuffer.InputBuffer, IoBuffer.InputLength))
return -EFAULT;