Machine freezes

[franz]

Hi, i'm currently working on POCL+HSA, and occasionally i get a complete machine freeze (sometimes just screen, sometimes even no reaction to SysRq magic). I compiled a kernel with a serial console, and today i got this:

Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x745000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x741000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x745000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x741000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x745000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x741000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x745000 flags 0x120
Sep 22 15:32:35 kaveri kernel: kfd kfd: HSA Process (PID 14682) got unhandled exception
Sep 22 15:32:35 kaveri kernel: kfd kfd: Invalid PPR device 0:1.0 pasid 1 address 0x741000 flags 0x120

This is on AMD A10-7800 with linux 4.2. Any ideas what's wrong, or how to debug this further ? Should i report the bug elsewhere ?