staging: atomisp: potential underflow in atomisp_get_metadata_by_type()
Commit Message
md_type is an enum. On my tests, GCC treats it as unsigned but
according to the C standard it's an implementation dependant thing so we
should check for negatives.
Fixes: a49d25364dfb ("staging/atomisp: Add support for the Intel IPU v2")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Comments
On Mon, 2017-03-13 at 15:34 +0300, Dan Carpenter wrote:
> md_type is an enum. On my tests, GCC treats it as unsigned but
> according to the C standard it's an implementation dependant thing so
> we
> should check for negatives.
Can do but the kernel assumes GNU C everywhere else.
Acked-by: Alan Cox <alan@linux.intel.com>
Alan
@@ -3005,7 +3005,7 @@ int atomisp_get_metadata_by_type(struct atomisp_sub_device *asd, int flag,
return 0;
md_type = md->type;
- if (md_type >= ATOMISP_METADATA_TYPE_NUM)
+ if (md_type < 0 || md_type >= ATOMISP_METADATA_TYPE_NUM)
return -EINVAL;
/* This is done in the atomisp_buf_done() */