[84476.251292] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
[84476.252001] IP: [<ffffffff819bbfb9>] intel_unmap_sg+0x49/0x140
[84476.252001] PGD 0 
[84476.252001] Oops: 0000 [#1] PREEMPT SMP 
[84476.252001] Modules linked in: zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO) spl(O) zavl(PO) microcode
[84476.252001] CPU: 0 PID: 3794 Comm: z_wr_iss/3 Tainted: P        W IO  3.16.0-rc5+ #18
[84476.252001] Hardware name: Empty Empty/S5397, BIOS V1.05           01/16/2009
[84476.252001] task: ffff8807fe596a70 ti: ffff8807fe374000 task.ti: ffff8807fe374000
[84476.252001] RIP: 0010:[<ffffffff819bbfb9>]  [<ffffffff819bbfb9>] intel_unmap_sg+0x49/0x140
[84476.252001] RSP: 0018:ffff88083fc03e30  EFLAGS: 00010093
[84476.252001] RAX: ffff8808139b03c0 RBX: ffff880812bb9d80 RCX: 0000000000000002
[84476.252001] RDX: ffff880813a37de0 RSI: 0000000000000002 RDI: 0000000000000004
[84476.252001] RBP: ffff88083fc03e68 R08: ffff880812bb9d88 R09: ffffffff819bbf70
[84476.252001] R10: 0000000000000000 R11: 8080808080808080 R12: 0000000000000058
[84476.252001] R13: 0000000000000000 R14: ffff880812bb9da8 R15: 0000000000000058
[84476.252001] FS:  0000000000000000(0000) GS:ffff88083fc00000(0000) knlGS:0000000000000000
[84476.252001] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[84476.252001] CR2: 0000000000000010 CR3: 0000000740eec000 CR4: 00000000000407f0
[84476.252001] Stack:
[84476.252001]  0000000000000082 ffff880812ea06d8 ffff880812ea06d8 0000000000000058
[84476.252001]  ffff880812ea4c30 0000000000000010 0000000000000058 ffff88083fc03e78
[84476.252001]  ffffffff816fddc0 ffff88083fc03ec8 ffffffff81708075 00004cd4a8eecedd
[84476.252001] Call Trace:
[84476.252001]  <IRQ> 
[84476.252001]  [<ffffffff816fddc0>] scsi_dma_unmap+0x50/0x70
[84476.252001]  [<ffffffff81708075>] twl_interrupt+0x415/0x720
[84476.252001]  [<ffffffff81118b4e>] ? hrtimer_forward+0x4e/0x90
[84476.252001]  [<ffffffff81138d01>] handle_irq_event_percpu+0x31/0x100
[84476.252001]  [<ffffffff81138e08>] handle_irq_event+0x38/0x60
[84476.252001]  [<ffffffff8113bd6c>] handle_fasteoi_irq+0x7c/0x140
[84476.252001]  [<ffffffff8103e8b9>] handle_irq+0x19/0x30
[84476.252001]  [<ffffffff8103e28a>] do_IRQ+0x4a/0xf0
[84476.252001]  [<ffffffff81c1192a>] common_interrupt+0x6a/0x6a
[84476.252001]  <EOI> 
[84476.252001]  [<ffffffffa013e00c>] ? vdev_queue_io_done+0x1fbc/0x3860 [zfs]
[84476.252001]  [<ffffffffa013ea3b>] vdev_queue_io_done+0x29eb/0x3860 [zfs]
[84476.252001]  [<ffffffffa0040763>] ? taskq_init_ent+0x33/0x1d0 [spl]
[84476.252001]  [<ffffffffa0176842>] ? zio_add_child+0x522/0x5e0 [zfs]
[84476.252001]  [<ffffffffa0174564>] zio_data_buf_free+0xa54/0x1b90 [zfs]
[84476.252001]  [<ffffffffa0177726>] zio_nowait+0xb6/0x1b0 [zfs]
[84476.252001]  [<ffffffffa013b10f>] vdev_config_sync+0xb5f/0xde0 [zfs]
[84476.252001]  [<ffffffffa013a6f0>] ? vdev_config_sync+0x140/0xde0 [zfs]
[84476.252001]  [<ffffffffa0174697>] zio_data_buf_free+0xb87/0x1b90 [zfs]
[84476.252001]  [<ffffffffa0175768>] zio_execute+0xc8/0x180 [zfs]
[84476.252001]  [<ffffffffa0041078>] taskq_cancel_id+0x2c8/0x470 [spl]
[84476.252001]  [<ffffffff811215d0>] ? wake_up_process+0x40/0x40
[84476.252001]  [<ffffffffa0040ed0>] ? taskq_cancel_id+0x120/0x470 [spl]
[84476.252001]  [<ffffffff811165d4>] kthread+0xc4/0xe0
[84476.252001]  [<ffffffff81116510>] ? kthread_create_on_node+0x170/0x170
[84476.252001]  [<ffffffff81c10e2c>] ret_from_fork+0x7c/0xb0
[84476.252001]  [<ffffffff81116510>] ? kthread_create_on_node+0x170/0x170
[84476.252001] Code: 75 77 48 8b 83 10 02 00 00 48 85 c0 0f 84 01 01 00 00 48 8b 58 38 48 85 db 0f 84 f4 00 00 00 4c 8d 73 28 48 89 df e8 a7 e0 ff ff <49> 8b 75 10 4c 89 f7 48 89 45 d0 48 c1 ee 0c e8 c3 ba ff ff 48 
[84476.252001] RIP  [<ffffffff819bbfb9>] intel_unmap_sg+0x49/0x140
[84476.252001]  RSP <ffff88083fc03e30>
[84476.252001] CR2: 0000000000000010
[84476.252001] ---[ end trace 17f09a8855351469 ]---
[84476.252001] Kernel panic - not syncing: Fatal exception in interrupt
[84476.252001] Shutting down cpus with NMI
[84476.252001] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffff9fffffff)
[84476.252001] drm_kms_helper: panic occurred, switching back to text console