[ 12.683176] Unable to handle kernel NULL pointer dereference at virtual address 0000009c
[ 12.691488] pgd = 80004000
[ 12.694245] [0000009c] *pgd=00000000
[ 12.697994] Internal error: Oops: 5 [#1] SMP ARM
[ 12.702688] Modules linked in: i2c_bcm2708(+) bcm2835_wdt[ 12.707547] bcm2708_i2c 3f205000.i2c: BSC0 Controller at 0x3f205000 (irq 83) (baudrate 100000)
[ 12.716756] bcm2835_gpiomem[ 12.717019] bcm2708_i2c 3f804000.i2c: BSC1 Controller at 0x3f804000 (irq 83) (baudrate 100000)
[ 12.719963] bcm2708_i2c 3f805000.i2c: BSC2 Controller at 0x3f805000 (irq 83) (baudrate 100000)
[ 12.737180] uio_pdrv_genirq uio iptable_filter ip_tables ip6table_filter ip6_tables br_netfilter bridge stp llc arp_tables x_tables vc4 drm_mipi_dsi drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops[ 12.750700] CPU: 2 PID: 110 Comm: kworker/u8:2 Not tainted 4.4.0-1048-raspi2 #55-Ubuntu
[ 12.750701] Hardware name: BCM2709
[ 12.750718] Workqueue: deferwq deferred_probe_work_func
[ 12.750722] task: b873af40 ti: b8ddc000 task.ti: b8ddc000
[ 12.750731] PC is at mutex_lock+0x20/0x64
[ 12.750735] LR is at mutex_lock+0x1c/0x64
[ 12.750739] pc : [<809f06cc>] lr : [<809f06c8>] psr: 60010013
[ 12.750739] sp : b8dddca0 ip : b8dddca0 fp : b8dddcb4
[ 12.750741] r10: 00000000 r9 : b99f6410 r8 : 00000000
[ 12.750744] r7 : b99f6410 r6 : 00000000 r5 : 0000009c r4 : 0000009c
[ 12.750748] r3 : b8ddc000 r2 : 00000000 r1 : 07ffffff r0 : 00000000
[ 12.750752] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[ 12.750755] Control: 10c5383d Table: 3875006a DAC: 00000055
[ 12.750757] Process kworker/u8:2 (pid: 110, stack limit = 0xb8ddc218)
[ 12.750762] Stack: (0xb8dddca0 to 0xb8dde000)
[ 12.750768] dca0: 00000040 0000009c b8dddcdc b8dddcb8 7f0e035c 809f06b8 b7eb3e10 b8342c00
[ 12.750774] dcc0: fffffdfb b99f6410 00000000 b99f6410 b8dddcf4 b8dddce0 7f0e0f9c 7f0e0340
[ 12.750780] dce0: b7eb3e10 b8342c00 b8dddd1c b8dddcf8 7f0e2c3c 7f0e0f74 b7d2ea48 00000007
[ 12.750785] dd00: b8728080 b7d2ea10 00000000 b99f6410 b8dddd44 b8dddd20 8062f6a8 7f0e2adc
[ 12.750791] dd20: b8728080 00000000 80f6f790 7f0f2450 b99f6410 b99f6410 b8dddd6c b8dddd48
[ 12.750797] dd40: 8062f7ac 8062f5d8 b99f5810 7f0fa4cc 80f6fad0 80f6fad0 7f0e2840 b99f6410
[ 12.750803] dd60: b8ddddac b8dddd70 7f0e2d30 8062f6f4 80f0354c 7f0f2488 b84ba010 dc8ba631
[ 12.750809] dd80: 00000000 81055c90 b99f6410 7f0fa16c fffffdfb 7f0fa16c 00000018 80facc70
[ 12.750814] dda0: b8ddddcc b8ddddb0 806378e0 7f0e2c68 81055c90 b99f6410 80facc70 00000000
[ 12.750820] ddc0: b8ddddfc b8ddddd0 80635500 80637890 b8ddddfc b8dddde0 7f0fa16c b8ddde54
[ 12.750826] dde0: b99f6410 806357e8 00000001 80c69370 b8ddde1c b8ddde00 8063587c 806352d4
[ 12.750832] de00: 00000000 b8ddde54 80f0354c 806357e8 b8ddde4c b8ddde20 806331dc 806357f4
[ 12.750838] de20: b8ddde4c b98aca70 b7d511b8 dc8ba631 b99f6410 80f0354c 80f6fad0 b99f6444
[ 12.750844] de40: b8ddde84 b8ddde50 806351b0 80633164 809ee3b0 b99f6410 00000001 dc8ba631
[ 12.750849] de60: 8014db98 b99f6410 b99f6410 80f6fad0 80f6f8e0 80facc70 b8ddde94 b8ddde88
[ 12.750855] de80: 80635900 806350dc b8dddeb4 b8ddde98 8063440c 806358f0 b99f6410 80f6f8c8
[ 12.750861] dea0: 80f6f8c8 80f6f8e0 b8dddee4 b8dddeb8 80634924 80634384 806348cc 80f6f8fc
[ 12.750867] dec0: b8cd4d80 b983b400 00000000 b8db8400 b8cd4d80 00000001 b8dddf24 b8dddee8
[ 12.750872] dee0: 8013ee94 806348d8 b983b400 b983b414 b8ddc000 00000088 b8cd4d80 b983b400
[ 12.750878] df00: b8cd4d98 b983b414 b8ddc000 00000088 b8cd4d80 b983b400 b8dddf5c b8dddf28
[ 12.750884] df20: 8013f294 8013ed40 b983b594 80f03100 00000000 00000000 b7ce2880 b8cd4d80
[ 12.750889] df40: 8013f240 00000000 00000000 00000000 b8dddfac b8dddf60 80145794 8013f24c
[ 12.750894] df60: 00000000 b873af40 b8cd4d80 00000000 00000000 b8dddf74 b8dddf74 00000000
[ 12.750900] df80: 00000000 b8dddf84 b8dddf84 dc8ba631 b7ce2880 80145698 00000000 00000000
[ 12.750905] dfa0: 00000000 b8dddfb0 80108ce8 801456a4 00000000 00000000 00000000 00000000
[ 12.750912] dfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 12.750917] dfe0: 00000000 00000000 00000000 00000000 00000013 00000000 f7d1fccf e7f5ea5a
[ 12.750983] [<809f06cc>] (mutex_lock) from [<7f0e035c>] (vc4_bo_cache_purge+0x28/0xb0 [vc4])
[ 12.751043] [<7f0e035c>] (vc4_bo_cache_purge [vc4]) from [<7f0e0f9c>] (vc4_bo_cache_destroy+0x34/0x58 [vc4])
[ 12.751096] [<7f0e0f9c>] (vc4_bo_cache_destroy [vc4]) from [<7f0e2c3c>] (vc4_drm_bind+0x16c/0x18c [vc4])
[ 12.751133] [<7f0e2c3c>] (vc4_drm_bind [vc4]) from [<8062f6a8>] (try_to_bring_up_master.part.0+0xdc/0x11c)
[ 12.751144] [<8062f6a8>] (try_to_bring_up_master.part.0) from [<8062f7ac>] (component_master_add_with_match+0xc4/0x138)
[ 12.751175] [<8062f7ac>] (component_master_add_with_match) from [<7f0e2d30>] (vc4_platform_drm_probe+0xd4/0xfc [vc4])
[ 12.751207] [<7f0e2d30>] (vc4_platform_drm_probe [vc4]) from [<806378e0>] (platform_drv_probe+0x5c/0xc0)
[ 12.751215] [<806378e0>] (platform_drv_probe) from [<80635500>] (driver_probe_device+0x238/0x480)
[ 12.751222] [<80635500>] (driver_probe_device) from [<8063587c>] (__device_attach_driver+0x94/0xbc)
[ 12.751230] [<8063587c>] (__device_attach_driver) from [<806331dc>] (bus_for_each_drv+0x84/0xc8)
[ 12.751237] [<806331dc>] (bus_for_each_drv) from [<806351b0>] (__device_attach+0xe0/0x174)
[ 12.751243] [<806351b0>] (__device_attach) from [<80635900>] (device_initial_probe+0x1c/0x20)
[ 12.751251] [<80635900>] (device_initial_probe) from [<8063440c>] (bus_probe_device+0x94/0x9c)
[ 12.751258] [<8063440c>] (bus_probe_device) from [<80634924>] (deferred_probe_work_func+0x58/0xd8)
[ 12.751268] [<80634924>] (deferred_probe_work_func) from [<8013ee94>] (process_one_work+0x160/0x50c)
[ 12.751277] [<8013ee94>] (process_one_work) from [<8013f294>] (worker_thread+0x54/0x574)
[ 12.751285] [<8013f294>] (worker_thread) from [<80145794>] (kthread+0xfc/0x114)