[94881.487330] ------------[ cut here ]------------
[94881.487350] WARNING: CPU: 2 PID: 3501 at /build/linux-7sjCdl/linux-4.3/fs/btrfs/extent-tree.c:6360 __btrfs_free_extent.isra.69+0x2f3/0xd30 [btrfs]()
[94881.487352] BTRFS: Transaction aborted (error -5)
[94881.487353] Modules linked in: uas usb_storage fuse rfcomm binfmt_misc bnep snd_hda_codec_hdmi ax88179_178a usbnet mii intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp dell_wmi sparse_keymap coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul hid_generic jitterentropy_rng btusb btrtl btbcm btintel iTCO_wdt joydev bluetooth iTCO_vendor_support hid_rmi sha256_ssse3 sha256_generic hmac drbg dell_laptop dcdbas dell_smm_hwmon ansi_cprng aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd i915 pcspkr psmouse evdev serio_raw uvcvideo videobuf2_vmalloc videobuf2_memops sg videobuf2_core v4l2_common snd_hda_codec_realtek videodev hid_multitouch snd_hda_codec_generic media arc4 snd_soc_rt5640 snd_soc_rl6231 snd_hda_intel snd_soc_core snd_hda_codec snd_compress i2c_i801 snd_hda_core
[94881.487395] snd_hwdep snd_pcm drm_kms_helper mei_me lpc_ich mfd_core snd_timer drm snd shpchp soundcore mei i2c_algo_bit wmi battery regmap_i2c snd_soc_sst_acpi dw_dmac dw_dmac_core video i2c_designware_platform i2c_designware_core button intel_smartconnect ac processor iwlmvm mac80211 loop iwlwifi cfg80211 rfkill parport_pc ppdev lp parport autofs4 ext4 crc16 mbcache jbd2 btrfs xor usbhid raid6_pq sd_mod crc32c_intel ahci libahci libata ehci_pci xhci_pci scsi_mod ehci_hcd xhci_hcd usbcore usb_common thermal sdhci_acpi sdhci mmc_core i2c_hid hid
[94881.487432] CPU: 2 PID: 3501 Comm: umount Tainted: G W 4.3.0-trunk-amd64 #1 Debian 4.3-1~exp1
[94881.487434] Hardware name: Dell Inc. XPS13 9333/0D13CM, BIOS A04 03/19/2014
[94881.487436] ffffffffa02b3250 ffffffff812c53a9 ffff880049a8fad8 ffffffff8106ebad
[94881.487439] 00000000fffffffb ffff880049a8fb28 ffff8801e1222800 ffff8801381b0000
[94881.487441] 0000000000000000 ffffffff8106ec2c ffffffffa02b3420 00a8000000000020
[94881.487443] Call Trace:
[94881.487450] [<ffffffff812c53a9>] ? dump_stack+0x40/0x57
[94881.487453] [<ffffffff8106ebad>] ? warn_slowpath_common+0x7d/0xb0
[94881.487455] [<ffffffff8106ec2c>] ? warn_slowpath_fmt+0x4c/0x50
[94881.487459] [<ffffffff811a5ec1>] ? kmem_cache_alloc+0x191/0x1a0
[94881.487468] [<ffffffffa021cbb3>] ? __btrfs_free_extent.isra.69+0x2f3/0xd30 [btrfs]
[94881.487472] [<ffffffff810cd714>] ? internal_add_timer+0x34/0x80
[94881.487474] [<ffffffff810cda7b>] ? add_timer_on+0xab/0x110
[94881.487483] [<ffffffffa0220bb7>] ? __btrfs_run_delayed_refs+0x987/0x1050 [btrfs]
[94881.487492] [<ffffffffa0223e98>] ? btrfs_run_delayed_refs+0x78/0x2a0 [btrfs]
[94881.487505] [<ffffffffa02a8e1f>] ? commit_cowonly_roots+0x7f/0x285 [btrfs]
[94881.487514] [<ffffffffa0223ffa>] ? btrfs_run_delayed_refs+0x1da/0x2a0 [btrfs]
[94881.487529] [<ffffffffa02994cd>] ? btrfs_qgroup_account_extents+0x6d/0x100 [btrfs]
[94881.487541] [<ffffffffa0238524>] ? btrfs_commit_transaction+0x5e4/0xaa0 [btrfs]
[94881.487551] [<ffffffffa02339ff>] ? close_ctree+0x27f/0x320 [btrfs]
[94881.487555] [<ffffffff811bed54>] ? generic_shutdown_super+0x64/0xf0
[94881.487557] [<ffffffff811bf01e>] ? kill_anon_super+0xe/0x20
[94881.487564] [<ffffffffa02097a3>] ? btrfs_kill_super+0x13/0x100 [btrfs]
[94881.487566] [<ffffffff811bf174>] ? deactivate_locked_super+0x34/0x60
[94881.487570] [<ffffffff811da89b>] ? cleanup_mnt+0x3b/0x80
[94881.487573] [<ffffffff81089731>] ? task_work_run+0x71/0x90
[94881.487576] [<ffffffff81003a0e>] ? prepare_exit_to_usermode+0xce/0xf0
[94881.487579] [<ffffffff81553a18>] ? int_ret_from_sys_call+0x25/0x8f
[94881.487580] ---[ end trace 9e5f60211f33f267 ]---
[94881.487583] BTRFS: error (device sdb1) in __btrfs_free_extent:6360: errno=-5 IO failure
[94881.487586] BTRFS info (device sdb1): forced readonly
[94881.487588] BTRFS: error (device sdb1) in btrfs_run_delayed_refs:2851: errno=-5 IO failure
[94881.487590] BTRFS warning (device sdb1): Skipping commit of aborted transaction.
[94881.487592] BTRFS: error (device sdb1) in cleanup_transaction:1741: errno=-5 IO failure
[94881.487603] BTRFS error (device sdb1): commit super ret -5