The bug triggers with the debug kernel, however there is no message like "fuse_direct_IO: io->reg would have gone negative" in the journal:

Jan 29 16:22:18 ubuntu dnsmasq-dhcp[896]: DHCPREQUEST(virbr0) 192.168.122.93 52:54:00:45:1c:61
Jan 29 16:22:18 ubuntu dnsmasq-dhcp[896]: DHCPACK(virbr0) 192.168.122.93 52:54:00:45:1c:61
Jan 29 16:22:51 ubuntu kernel: BUG: unable to handle kernel paging request at ffff8800904b06c0
Jan 29 16:22:51 ubuntu kernel: IP: [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:51 ubuntu kernel: PGD 1ff0067 PUD 3738b6063 PMD 0 
Jan 29 16:22:51 ubuntu kernel: Oops: 0000 [#1] SMP 
Jan 29 16:22:51 ubuntu kernel: Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 ipmi_ssif ipmi_devintf gpio_ich coretemp kvm_intel serio_raw kvm input_leds cdc_ether usbnet mii lpc_ich i7core_edac ioatdma edac_core i5500_temp shpchp dca 8250_fintek ipmi_si mac_hid ipmi_msghandler sunrpc autofs4 hid_generic mptsas mptscsih usbhid mptbase psmouse hid pata_acpi scsi_transport_sas bnx2
Jan 29 16:22:51 ubuntu kernel: CPU: 4 PID: 21954 Comm: qemu-system-x86 Tainted: G          I     4.2.0-27-generic #32lp1505948v201601281755
Jan 29 16:22:51 ubuntu kernel: Hardware name: IBM System x3550 M2 -[794654G]-/49Y6512     , BIOS -[D6E131CUS-1.05]- 11/25/2009
Jan 29 16:22:51 ubuntu kernel: task: ffff880380e98c80 ti: ffff8803811d4000 task.ti: ffff8803811d4000
Jan 29 16:22:51 ubuntu kernel: RIP: 0010:[<ffffffff811df264>]  [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:51 ubuntu kernel: RSP: 0018:ffff8803811d79c8  EFLAGS: 00010286
Jan 29 16:22:51 ubuntu kernel: RAX: 0000000000000000 RBX: 00000000000000d0 RCX: 000000000009d36e
Jan 29 16:22:51 ubuntu kernel: RDX: 000000000009d36d RSI: 0000000000000000 RDI: 0000000000019aa0
Jan 29 16:22:51 ubuntu kernel: RBP: ffff8803811d7a08 R08: ffff88067fc19aa0 R09: ffffffff812f8d56
Jan 29 16:22:51 ubuntu kernel: R10: ffff8800904b06c0 R11: 000000000000081a R12: 00000000000000d0
Jan 29 16:22:51 ubuntu kernel: R13: 0000000000000058 R14: ffff8803738037c0 R15: ffff8803738037c0
Jan 29 16:22:51 ubuntu kernel: FS:  00007f384a78eb00(0000) GS:ffff88067fc00000(0000) knlGS:0000000000000000
Jan 29 16:22:51 ubuntu kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jan 29 16:22:51 ubuntu kernel: CR2: ffff8800904b06c0 CR3: 00000002da9d5000 CR4: 00000000000026e0
Jan 29 16:22:51 ubuntu kernel: Stack:
Jan 29 16:22:51 ubuntu kernel:  ffff8803811d7a18 ffffffff812f8d56 ffff880371e2b200 ffff8805993ae0d0
Jan 29 16:22:51 ubuntu kernel:  000000000000000b 00000000000000d0 0000000000000058 ffff8805993ae210
Jan 29 16:22:51 ubuntu kernel:  ffff8803811d7a58 ffffffff812f8d56 ffff8803811d7a38 ffff8805993ae0d0
Jan 29 16:22:51 ubuntu kernel: Call Trace:
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff812f8d56>] ? __fuse_request_alloc+0x56/0xd0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff812f8d56>] __fuse_request_alloc+0x56/0xd0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff812f9026>] __fuse_get_req+0x1d6/0x280
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff810bd7d0>] ? wake_atomic_t_function+0x60/0x60
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff812f90e0>] fuse_get_req+0x10/0x20
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8130389d>] fuse_direct_io+0x4fd/0x5c0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff812fce2f>] ? fuse_getxattr+0x12f/0x160
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff811de8e7>] ? kmem_cache_alloc_trace+0x187/0x1f0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8130445f>] ? fuse_direct_IO+0xff/0x3b0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff813044f3>] fuse_direct_IO+0x193/0x3b0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff811843b9>] generic_file_direct_write+0xb9/0x180
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff81304efc>] fuse_file_write_iter+0x15c/0x2e0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff813267cd>] ? security_file_permission+0x3d/0xc0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff81304da0>] ? fuse_perform_write+0x540/0x540
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8124adff>] aio_run_iocb+0x27f/0x2e0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8123f046>] ? fsnotify+0x316/0x4a0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8121b265>] ? __fget_light+0x25/0x60
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8124bcdb>] do_io_submit+0x24b/0x4f0
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff810a6240>] ? wake_up_q+0x70/0x70
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff8124bf90>] SyS_io_submit+0x10/0x20
Jan 29 16:22:51 ubuntu kernel:  [<ffffffff817f2532>] entry_SYSCALL_64_fastpath+0x16/0x75
Jan 29 16:22:51 ubuntu kernel: Code: 08 65 4c 03 05 36 af e2 7e 49 83 78 10 00 4d 8b 10 0f 84 36 01 00 00 4d 85 d2 0f 84 2d 01 00 00 49 63 46 20 48 8d 4a 01 49 8b 3e <49> 8b 1c 02 4c 89 d0 65 48 0f c7 0f 0f 94 c0 84 c0 74 bb 49 63 
Jan 29 16:22:51 ubuntu kernel: RIP  [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:51 ubuntu kernel:  RSP <ffff8803811d79c8>
Jan 29 16:22:51 ubuntu kernel: CR2: ffff8800904b06c0
Jan 29 16:22:51 ubuntu kernel: ---[ end trace 1ebba465731d9933 ]---
Jan 29 16:22:52 ubuntu kernel: BUG: unable to handle kernel paging request at ffff8800904b06c0
Jan 29 16:22:52 ubuntu kernel: IP: [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:52 ubuntu kernel: PGD 1ff0067 PUD 3738b6063 PMD 0 
Jan 29 16:22:52 ubuntu kernel: Oops: 0000 [#2] SMP 
Jan 29 16:22:52 ubuntu kernel: Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 ipmi_ssif ipmi_devintf gpio_ich coretemp kvm_intel serio_raw kvm input_leds cdc_ether usbnet mii lpc_ich i7core_edac ioatdma edac_core i5500_temp shpchp dca 8250_fintek ipmi_si mac_hid ipmi_msghandler sunrpc autofs4 hid_generic mptsas mptscsih usbhid mptbase psmouse hid pata_acpi scsi_transport_sas bnx2
Jan 29 16:22:52 ubuntu kernel: CPU: 4 PID: 21994 Comm: qemu-system-x86 Tainted: G      D   I     4.2.0-27-generic #32lp1505948v201601281755
Jan 29 16:22:52 ubuntu kernel: Hardware name: IBM System x3550 M2 -[794654G]-/49Y6512     , BIOS -[D6E131CUS-1.05]- 11/25/2009
Jan 29 16:22:52 ubuntu kernel: task: ffff88048cb88000 ti: ffff88062d63c000 task.ti: ffff88062d63c000
Jan 29 16:22:52 ubuntu kernel: RIP: 0010:[<ffffffff811de7da>]  [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:52 ubuntu kernel: RSP: 0018:ffff88062d63fb68  EFLAGS: 00010286
Jan 29 16:22:52 ubuntu kernel: RAX: 0000000000000000 RBX: 00000000000000d0 RCX: 000000000009d36e
Jan 29 16:22:52 ubuntu kernel: RDX: 000000000009d36d RSI: 00000000000000d0 RDI: 0000000000019aa0
Jan 29 16:22:52 ubuntu kernel: RBP: ffff88062d63fba8 R08: ffff88067fc19aa0 R09: ffffffff8130445f
Jan 29 16:22:52 ubuntu kernel: R10: 0000000000000000 R11: 0000000000000337 R12: 00000000000000d0
Jan 29 16:22:52 ubuntu kernel: R13: ffff8803738037c0 R14: ffff8800904b06c0 R15: ffff8803738037c0
Jan 29 16:22:52 ubuntu kernel: FS:  00007f4931ae9b00(0000) GS:ffff88067fc00000(0000) knlGS:0000000000000000
Jan 29 16:22:52 ubuntu kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 29 16:22:52 ubuntu kernel: CR2: ffff8800904b06c0 CR3: 000000020a958000 CR4: 00000000000026e0
Jan 29 16:22:52 ubuntu kernel: Stack:
Jan 29 16:22:52 ubuntu kernel:  ffffffff8130445f 0000000000000048 0000000000000008 000000000a465000
Jan 29 16:22:52 ubuntu kernel:  ffff880636b1cc00 ffff88000ee95d00 0000000000000001 ffff88062d63fc78
Jan 29 16:22:52 ubuntu kernel:  ffff88062d63fc48 ffffffff8130445f ffff88062d63fb58 0000000000000000
Jan 29 16:22:52 ubuntu kernel: Call Trace:
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8130445f>] ? fuse_direct_IO+0xff/0x3b0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8130445f>] fuse_direct_IO+0xff/0x3b0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff811843b9>] generic_file_direct_write+0xb9/0x180
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff81304efc>] fuse_file_write_iter+0x15c/0x2e0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff813267cd>] ? security_file_permission+0x3d/0xc0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff81304da0>] ? fuse_perform_write+0x540/0x540
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8124adff>] aio_run_iocb+0x27f/0x2e0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8123f046>] ? fsnotify+0x316/0x4a0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8121b265>] ? __fget_light+0x25/0x60
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8124bcdb>] do_io_submit+0x24b/0x4f0
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff810a6240>] ? wake_up_q+0x70/0x70
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff8124bf90>] SyS_io_submit+0x10/0x20
Jan 29 16:22:52 ubuntu kernel:  [<ffffffff817f2532>] entry_SYSCALL_64_fastpath+0x16/0x75
Jan 29 16:22:52 ubuntu kernel: Code: 65 4c 03 05 c1 b9 e2 7e 49 83 78 10 00 4d 8b 30 0f 84 2b 01 00 00 4d 85 f6 0f 84 22 01 00 00 49 63 45 20 48 8d 4a 01 49 8b 7d 00 <49> 8b 1c 06 4c 89 f0 65 48 0f c7 0f 0f 94 c0 84 c0 74 b9 49 63 
Jan 29 16:22:52 ubuntu kernel: RIP  [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:52 ubuntu kernel:  RSP <ffff88062d63fb68>
Jan 29 16:22:52 ubuntu kernel: CR2: ffff8800904b06c0
Jan 29 16:22:52 ubuntu kernel: ---[ end trace 1ebba465731d9934 ]---
Jan 29 16:22:53 ubuntu kernel: BUG: unable to handle kernel paging request at ffff8800904b06c0
Jan 29 16:22:53 ubuntu kernel: IP: [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:53 ubuntu kernel: PGD 1ff0067 PUD 3738b6063 PMD 0 
Jan 29 16:22:53 ubuntu kernel: Oops: 0000 [#3] SMP 
Jan 29 16:22:53 ubuntu kernel: Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 ipmi_ssif ipmi_devintf gpio_ich coretemp kvm_intel serio_raw kvm input_leds cdc_ether usbnet mii lpc_ich i7core_edac ioatdma edac_core i5500_temp shpchp dca 8250_fintek ipmi_si mac_hid ipmi_msghandler sunrpc autofs4 hid_generic mptsas mptscsih usbhid mptbase psmouse hid pata_acpi scsi_transport_sas bnx2
Jan 29 16:22:53 ubuntu kernel: CPU: 4 PID: 21888 Comm: qemu-system-x86 Tainted: G      D   I     4.2.0-27-generic #32lp1505948v201601281755
Jan 29 16:22:53 ubuntu kernel: Hardware name: IBM System x3550 M2 -[794654G]-/49Y6512     , BIOS -[D6E131CUS-1.05]- 11/25/2009
Jan 29 16:22:53 ubuntu kernel: task: ffff8806681a5780 ti: ffff88005c210000 task.ti: ffff88005c210000
Jan 29 16:22:53 ubuntu kernel: RIP: 0010:[<ffffffff811de7da>]  [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:53 ubuntu kernel: RSP: 0018:ffff88005c213b68  EFLAGS: 00010286
Jan 29 16:22:53 ubuntu kernel: RAX: 0000000000000000 RBX: 00000000000000d0 RCX: 000000000009d36e
Jan 29 16:22:53 ubuntu kernel: RDX: 000000000009d36d RSI: 00000000000000d0 RDI: 0000000000019aa0
Jan 29 16:22:53 ubuntu kernel: RBP: ffff88005c213ba8 R08: ffff88067fc19aa0 R09: ffffffff8130445f
Jan 29 16:22:53 ubuntu kernel: R10: ffffea001664eb00 R11: 0000000000000f1b R12: 00000000000000d0
Jan 29 16:22:53 ubuntu kernel: R13: ffff8803738037c0 R14: ffff8800904b06c0 R15: ffff8803738037c0
Jan 29 16:22:53 ubuntu kernel: FS:  00007f975c60fb00(0000) GS:ffff88067fc00000(0000) knlGS:0000000000000000
Jan 29 16:22:53 ubuntu kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Jan 29 16:22:53 ubuntu kernel: CR2: ffff8800904b06c0 CR3: 00000003705cf000 CR4: 00000000000026e0
Jan 29 16:22:53 ubuntu kernel: Stack:
Jan 29 16:22:53 ubuntu kernel:  ffffffff8130445f 0000000000000048 0000000000000008 000000000a1b0000
Jan 29 16:22:53 ubuntu kernel:  ffff8804aa0a2c80 ffff8802b7d4db00 0000000000000001 ffff88005c213c78
Jan 29 16:22:53 ubuntu kernel:  ffff88005c213c48 ffffffff8130445f ffff88005c213b58 0000000000000000
Jan 29 16:22:53 ubuntu kernel: Call Trace:
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8130445f>] ? fuse_direct_IO+0xff/0x3b0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8130445f>] fuse_direct_IO+0xff/0x3b0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff811843b9>] generic_file_direct_write+0xb9/0x180
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff81304efc>] fuse_file_write_iter+0x15c/0x2e0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff813267cd>] ? security_file_permission+0x3d/0xc0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff81304da0>] ? fuse_perform_write+0x540/0x540
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8124adff>] aio_run_iocb+0x27f/0x2e0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff811b57bf>] ? handle_mm_fault+0xb7f/0x17e0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8121b265>] ? __fget_light+0x25/0x60
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8124bcdb>] do_io_submit+0x24b/0x4f0
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff8124bf90>] SyS_io_submit+0x10/0x20
Jan 29 16:22:53 ubuntu kernel:  [<ffffffff817f2532>] entry_SYSCALL_64_fastpath+0x16/0x75
Jan 29 16:22:53 ubuntu kernel: Code: 65 4c 03 05 c1 b9 e2 7e 49 83 78 10 00 4d 8b 30 0f 84 2b 01 00 00 4d 85 f6 0f 84 22 01 00 00 49 63 45 20 48 8d 4a 01 49 8b 7d 00 <49> 8b 1c 06 4c 89 f0 65 48 0f c7 0f 0f 94 c0 84 c0 74 b9 49 63 
Jan 29 16:22:53 ubuntu kernel: RIP  [<ffffffff811de7da>] kmem_cache_alloc_trace+0x7a/0x1f0
Jan 29 16:22:53 ubuntu kernel:  RSP <ffff88005c213b68>
Jan 29 16:22:53 ubuntu kernel: CR2: ffff8800904b06c0
Jan 29 16:22:53 ubuntu kernel: ---[ end trace 1ebba465731d9935 ]---
Jan 29 16:22:54 ubuntu kernel: BUG: unable to handle kernel paging request at ffff8800904b06c0
Jan 29 16:22:54 ubuntu kernel: IP: [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:54 ubuntu kernel: PGD 1ff0067 PUD 3738b6063 PMD 0 
Jan 29 16:22:54 ubuntu kernel: Oops: 0000 [#4] SMP 
Jan 29 16:22:54 ubuntu kernel: Modules linked in: xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables nls_iso8859_1 ipmi_ssif ipmi_devintf gpio_ich coretemp kvm_intel serio_raw kvm input_leds cdc_ether usbnet mii lpc_ich i7core_edac ioatdma edac_core i5500_temp shpchp dca 8250_fintek ipmi_si mac_hid ipmi_msghandler sunrpc autofs4 hid_generic mptsas mptscsih usbhid mptbase psmouse hid pata_acpi scsi_transport_sas bnx2
Jan 29 16:22:54 ubuntu kernel: CPU: 4 PID: 294 Comm: jbd2/sda2-8 Tainted: G      D   I     4.2.0-27-generic #32lp1505948v201601281755
Jan 29 16:22:54 ubuntu kernel: Hardware name: IBM System x3550 M2 -[794654G]-/49Y6512     , BIOS -[D6E131CUS-1.05]- 11/25/2009
Jan 29 16:22:54 ubuntu kernel: task: ffff88066e496400 ti: ffff88036e98c000 task.ti: ffff88036e98c000
Jan 29 16:22:54 ubuntu kernel: RIP: 0010:[<ffffffff811df264>]  [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:54 ubuntu kernel: RSP: 0018:ffff88036e98f898  EFLAGS: 00010286
Jan 29 16:22:54 ubuntu kernel: RAX: 0000000000000000 RBX: 0000000000008050 RCX: 000000000009d36e
Jan 29 16:22:54 ubuntu kernel: RDX: 000000000009d36d RSI: 0000000000000000 RDI: 0000000000019aa0
Jan 29 16:22:54 ubuntu kernel: RBP: ffff88036e98f8d8 R08: ffff88067fc19aa0 R09: ffffffff812b0d79
Jan 29 16:22:54 ubuntu kernel: R10: ffff8800904b06c0 R11: 0000000000000004 R12: 0000000000008050
Jan 29 16:22:54 ubuntu kernel: R13: 0000000000000060 R14: ffff8803738037c0 R15: ffff8803738037c0
Jan 29 16:22:54 ubuntu kernel: FS:  0000000000000000(0000) GS:ffff88067fc00000(0000) knlGS:0000000000000000
Jan 29 16:22:54 ubuntu kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Jan 29 16:22:54 ubuntu kernel: CR2: ffff8800904b06c0 CR3: 0000000001c0c000 CR4: 00000000000026e0
Jan 29 16:22:54 ubuntu kernel: Stack:
Jan 29 16:22:54 ubuntu kernel:  ffff8803703880c0 ffffffff812b0d79 0000000000000000 0000000000002056
Jan 29 16:22:54 ubuntu kernel:  0000000000002056 0000000000000000 0000000000000000 ffff880370388000
Jan 29 16:22:54 ubuntu kernel:  ffff88036e98f948 ffffffff812b0d79 ffff8803703880c0 ffff88066e496468
Jan 29 16:22:54 ubuntu kernel: Call Trace:
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812b0d79>] ? ext4_find_extent+0x1b9/0x320
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812b0d79>] ext4_find_extent+0x1b9/0x320
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812b5488>] ext4_ext_map_blocks+0x88/0xe30
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810b345b>] ? dequeue_task_fair+0x36b/0x700
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff81285e6b>] ext4_map_blocks+0x9b/0x4a0
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff817eec80>] ? bit_wait+0x60/0x60
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff8128632f>] _ext4_get_block+0xbf/0x220
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810ed9d7>] ? ktime_get+0x37/0xa0
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812864a6>] ext4_get_block+0x16/0x20
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812325ee>] generic_block_bmap+0x4e/0x70
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812d5828>] ? journal_submit_data_buffers+0x48/0x1b0
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff81283327>] ext4_bmap+0x77/0xe0
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff81217b1c>] bmap+0x1c/0x30
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812dd70f>] jbd2_journal_bmap+0x2f/0x80
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812dd7cb>] jbd2_journal_next_log_block+0x6b/0x80
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812dd9db>] jbd2_journal_get_descriptor_buffer+0x2b/0xb0
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812d64e1>] jbd2_journal_commit_transaction+0x991/0x1690
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810b345b>] ? dequeue_task_fair+0x36b/0x700
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810b2821>] ? put_prev_entity+0x31/0x420
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810e5b8e>] ? try_to_del_timer_sync+0x5e/0x90
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff812da9da>] kjournald2+0xca/0x250
Jan 29 16:22:54 ubuntu kernel:  [<ffffffff810bd7d0>] ? wake_atomic_t_function+0x60/0x60
Jan 29 16:22:55 ubuntu kernel:  [<ffffffff812da910>] ? commit_timeout+0x10/0x10
Jan 29 16:22:55 ubuntu kernel:  [<ffffffff8109ae48>] kthread+0xd8/0xf0
Jan 29 16:22:55 ubuntu kernel:  [<ffffffff8109ad70>] ? kthread_create_on_node+0x1f0/0x1f0
Jan 29 16:22:55 ubuntu kernel:  [<ffffffff817f295f>] ret_from_fork+0x3f/0x70
Jan 29 16:22:55 ubuntu kernel:  [<ffffffff8109ad70>] ? kthread_create_on_node+0x1f0/0x1f0
Jan 29 16:22:55 ubuntu kernel: Code: 08 65 4c 03 05 36 af e2 7e 49 83 78 10 00 4d 8b 10 0f 84 36 01 00 00 4d 85 d2 0f 84 2d 01 00 00 49 63 46 20 48 8d 4a 01 49 8b 3e <49> 8b 1c 02 4c 89 d0 65 48 0f c7 0f 0f 94 c0 84 c0 74 bb 49 63 
Jan 29 16:22:55 ubuntu kernel: RIP  [<ffffffff811df264>] __kmalloc+0x94/0x250
Jan 29 16:22:55 ubuntu kernel:  RSP <ffff88036e98f898>
Jan 29 16:22:55 ubuntu kernel: CR2: ffff8800904b06c0
Jan 29 16:22:55 ubuntu kernel: ---[ end trace 1ebba465731d9936 ]---