On Do, 2018-08-23 at 12:44 -0500, Gustavo A. R. Silva wrote: > A common flaw in the kernel is integer overflow during memory allocation > size calculations. In an effort to reduce the frequency of these bugs, > kmalloc_array was implemented, which allocates memory for an array, > while at the same time detects integer overflow. > > This patch replaces cases of: > > kmalloc(a * b, gfp) > > with: > kmalloc_array(a * b, gfp) I am afraid there is a problem here. The driver currently is a gross violation of the DMA rules. Unfortunately your patch does not fix that. That is on anyrhing other than x86 you cannot take the size of a report, but you must use the size of a cache line. Regards Oliver
