general protection fault: 0000 [#1] SMP NOPTI
Modules linked in: cmac arc4 md4 nls_utf8 cifs ccm fscache binfmt_misc uvcvideo videobuf2_vmalloc videobuf2_memops snd_usb_audio videobuf2_v4l2 videobuf2_core videodev media snd_usbmidi_lib joydev edac_mce_amd kvm_amd input_leds kvm irqbypass serio_raw wmi_bmof k10temp snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore shpchp mac_hid sch_fq_codel it87 hwmon_vid pci_stub vboxpci(OE) vboxnetflt(OE) vboxnetadp(OE) sunrpc vboxdrv(OE) parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs zstd_compress crypto_simd glue_helper cryptd aes_x86_64 algif_skcipher af_alg dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq
 async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_microsoft radeon i2c_algo_bit ttm firewire_ohci drm_kms_helper firewire_core syscopyarea pata_acpi crc_itu_t pata_atiixp r8169 sysfillrect sysimgblt fb_sys_fops i2c_piix4 mii drm pata_jmicron ahci libahci wmi hid_generic usbhid hid
CPU: 3 PID: 1627 Comm: cifsd Tainted: G           OE    4.15.0-13-generic #14-Ubuntu
Hardware name: Gigabyte Technology Co., Ltd. GA-790XT-USB3/GA-790XT-USB3, BIOS F4 05/13/2010
RIP: 0010:prefetch_freepointer+0x15/0x30
RSP: 0018:ffffaa4742703da0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: a5061476627ee42c RCX: 000000000001e1d3
RDX: 000000000001e1d2 RSI: a5061476627ee42c RDI: ffff9764dd334a80
RBP: ffffaa4742703da0 R08: ffff9764efceb520 R09: 0000000000000400
R10: ffffaa4742703cd8 R11: 000000000000023a R12: 0000000001011200
R13: ffff9764dd334a80 R14: ffff9764d774ef40 R15: ffff9764dd334a80
FS:  0000000000000000(0000) GS:ffff9764efcc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb34a2926a0 CR3: 000000010dff8000 CR4: 00000000000006e0
Call Trace:
 kmem_cache_alloc+0xa2/0x1b0
 ? mempool_alloc_slab+0x15/0x20
 ? wait_woken+0x80/0x80
 mempool_alloc_slab+0x15/0x20
 mempool_alloc+0x71/0x190
 cifs_small_buf_get+0x1a/0x30 [cifs]
 cifs_demultiplex_thread+0x5c7/0xaf0 [cifs]
 ? __schedule+0x29f/0x8b0
 kthread+0x121/0x140
 ? cifs_handle_standard+0x190/0x190 [cifs]
 ? kthread_create_worker_on_cpu+0x70/0x70
 ret_from_fork+0x22/0x40
Code: eb bb 49 8b 74 24 60 48 c7 c7 70 70 4e 97 e8 a3 d0 ea ff eb 90 90 0f 1f 44 00 00 55 48 85 f6 48 89 e5 74 14 48 63 47 20 48 01 c6 <48> 33 36 48 33 b7 40 01 00 00 0f 18 0e 5d c3 66 90 66 2e 0f 1f 
RIP: prefetch_freepointer+0x15/0x30 RSP: ffffaa4742703da0
---[ end trace da53d8e19d18e227 ]---