Hi, -next commit "Input: Send events one packet at a time" seems like broke the input layer: BUG: unable to handle kernel NULL pointer dereference at (null) IP: [< (null)>] (null) PGD 0 Oops: 0010 [#1] SMP Modules linked in: CPU 0 Pid: 0, comm: swapper/0 Not tainted 3.6.0-rc5-next-20120912_64+ #44 Bochs Bochs RIP: 0010:[<0000000000000000>] [< (null)>] (null) RSP: 0018:ffff880049603c70 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000045 RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffff880047bff918 RBP: ffff880049603cb8 R08: 00000000000000c5 R09: ffff880047400000 R10: 000000000000001d R11: 00000000000000c5 R12: ffffffff81a36c00 R13: ffff8800465c6d50 R14: ffff8800465c6d50 R15: ffff8800465c6d48 FS: 0000000000000000(0000) GS:ffff880049600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 0000000001a0b000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper/0 (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a13420) Stack: ffffffff81473df2 ffffffff8109c4de ffff880047bff918 ffff880049611200 ffff8800465c6d40 ffff880047bff918 ffff880046a2ae68 0000000000000002 ffff880046a2b328 ffff880049603d08 ffffffff81475ea9 ffffffff810965c5 Call Trace: <IRQ> [<ffffffff81473df2>] ? input_to_handler+0xc2/0xe0 [<ffffffff8109c4de>] ? enqueue_task_fair+0xfe/0x180 [<ffffffff81475ea9>] input_pass_values.part.14+0x159/0x160 [<ffffffff810965c5>] ? check_preempt_curr+0x75/0xa0 [<ffffffff81476f03>] input_handle_event+0x113/0x520 [<ffffffff81477402>] input_event+0x52/0x70 [<ffffffff810989ed>] ? default_wake_function+0xd/0x10 [<ffffffff8147d657>] atkbd_interrupt+0x297/0x6b0 [<ffffffff81094bb5>] ? __wake_up_common+0x55/0x90 [<ffffffff81470e6d>] serio_interrupt+0x4d/0xa0 [<ffffffff814721ba>] i8042_interrupt+0x1ba/0x3a0 [<ffffffff810d4902>] ? rcu_process_callbacks+0x3c2/0x4e0 [<ffffffff8109df97>] ? run_rebalance_domains+0x47/0x160 [<ffffffff810ce243>] handle_irq_event_percpu+0x43/0x160 [<ffffffff8109a647>] ? sched_clock_tick+0x57/0xa0 [<ffffffff810ce39c>] handle_irq_event+0x3c/0x60 [<ffffffff810d0aaf>] handle_edge_irq+0x6f/0x110 [<ffffffff8103a52d>] handle_irq+0x1d/0x30 If I do this, everything works: --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -112,9 +112,12 @@ static unsigned int input_to_handler(struct input_handle *handle, if (!count) return 0; + WARN_ONCE(!handler->events && !handler->event, "%s: %s", + handle->name, handler->name); + if (handler->events) handler->events(handle, vals, count); - else + else if (handler->event) for (v = vals; v != end; v++) handler->event(handle, v->type, v->code, v->value); PS sysrq is the driver causing this. regards, -- js suse labs -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html