In interrupt context, write dbg_ev_file will be run by work queue. It will cause write dbg_ev_file execution after debug_trap_disable, which will cause NULL pointer access. Signed-off-by: Lin.Cao <lincao12@xxxxxxx> --- drivers/gpu/drm/amd/amdkfd/kfd_debug.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_debug.c b/drivers/gpu/drm/amd/amdkfd/kfd_debug.c index d889e3545120..55ce50ba4be2 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_debug.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_debug.c @@ -103,7 +103,8 @@ void debug_event_write_work_handler(struct work_struct *work) struct kfd_process, debug_event_workarea); - kernel_write(process->dbg_ev_file, &write_data, 1, &pos); + if (process->debug_trap_enabled && process->dbg_ev_file) + kernel_write(process->dbg_ev_file, &write_data, 1, &pos); } /* update process/device/queue exception status, write to descriptor -- 2.25.1
