4.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wei Lu <wei.lu2@xxxxxxx> [ Upstream commit e47cb828eb3fca3e8999a0b9aa053dda18552071 ] Return ERR_PTR(-EINVAL) if kfd_get_process fails to find the process. This fixes kernel oopses when a child process calls KFD ioctls with a file descriptor inherited from the parent process. Signed-off-by: Wei Lu <wei.lu2@xxxxxxx> Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> Acked-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Oded Gabbay <oded.gabbay@xxxxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -244,6 +244,8 @@ struct kfd_process *kfd_get_process(cons return ERR_PTR(-EINVAL); process = find_process(thread); + if (!process) + return ERR_PTR(-EINVAL); return process; }
