我有一台运行 Ubuntu 18.04 和 gnome shell 的 XPS13 (9343)。我挂载了两个 CIFS 网络共享（位于 Debian 服务器上），最近我遇到了系统在复制到这些共享时冻结的问题。这种情况并不是每次都会发生，文件大小似乎与冻结时间无关，但每隔几个小时就会发生一次，最后我不得不对 XPS 进行硬重启 - 我可以访问终端，但“sudo reboot”就挂起了。该错误还会破坏本地文件系统，因此即使在没有任何挂载的情况下在本地 ssd 上的目录中进行简单的 ls 也无法完成。以下是其中一个事件的系统日志，我希望有人可以根据日志建议我应该将调查重点放在哪里：
Oct 10 09:57:48 XPS-13 gnome-shell[1941]: Ignoring excess values in shadow definition
Oct 10 09:58:12 XPS-13 kernel: [65888.125916] general protection fault: 0000 [#3] SMP PTI
Oct 10 09:58:12 XPS-13 kernel: [65888.125920] Modules linked in: arc4 md4 nls_utf8 cifs ccm fscache rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) xfrm_user xfrm4_tunnel tunnel4 l2tp_ppp l2tp_netlink ipcomp l2tp_core xfrm_ipcomp ip6_udp_tunnel vboxdrv(OE) udp_tunnel pppox esp4 ah4 af_key xfrm_algo cmac bnep nls_iso8859_1 dell_smbios_smm dcdbas intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass intel_cstate intel_rapl_perf dell_smbios_wmi dell_wmi wmi_bmof sparse_keymap dell_wmi_descriptor ax88179_178a btusb btrtl usbnet btbcm btintel mii bluetooth joydev input_leds uvcvideo wl(POE) videobuf2_vmalloc videobuf2_memops ecdh_generic videobuf2_v4l2 snd_usb_audio videobuf2_core snd_usbmidi_lib videodev media snd_seq_midi snd_seq_midi_event dell_laptop dell_smbios snd_rawmidi snd_hda_codec_realtek
Oct 10 09:58:12 XPS-13 kernel: [65888.125955] snd_hda_codec_hdmi snd_hda_codec_generic serio_raw cfg80211 snd_hda_intel snd_hda_codec rtsx_pci_ms intel_pch_thermal hid_multitouch mei_me snd_seq snd_hda_core snd_hwdep memstick snd_pcm lpc_ich mei shpchp snd_seq_device snd_timer snd processor_thermal_device intel_soc_dts_iosf soundcore int3403_thermal dw_dmac dw_dmac_core mac_hid int3402_thermal int340x_thermal_zone int3400_thermal acpi_thermal_rel intel_smartconnect acpi_pad sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 algif_skcipher af_alg dm_crypt hid_logitech_hidpp hid_logitech_dj hid_plantronics hid_generic usbhid i915 crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc rtsx_pci_sdmmc i2c_algo_bit drm_kms_helper aesni_intel syscopyarea sysfillrect aes_x86_64 crypto_simd glue_helper cryptd psmouse sysimgblt
Oct 10 09:58:12 XPS-13 kernel: [65888.125996] fb_sys_fops drm ahci libahci rtsx_pci wmi i2c_hid hid video
Oct 10 09:58:12 XPS-13 kernel: [65888.126004] CPU: 1 PID: 4423 Comm: ShFolders Tainted: P D OE 4.15.0-36-generic #39-Ubuntu
Oct 10 09:58:12 XPS-13 kernel: [65888.126005] Hardware name: Dell Inc. XPS 13 9343/0310JH, BIOS A15 01/23/2018
Oct 10 09:58:12 XPS-13 kernel: [65888.126010] RIP: 0010:kmem_cache_alloc+0x81/0x1b0
Oct 10 09:58:12 XPS-13 kernel: [65888.126012] RSP: 0018:ffffa0c5c31c3618 EFLAGS: 00010286
Oct 10 09:58:12 XPS-13 kernel: [65888.126014] RAX: 919a70ed5ff573cf RBX: 919a70ed5ff573cf RCX: 0000000000391fff
Oct 10 09:58:12 XPS-13 kernel: [65888.126015] RDX: 0000000000391ffe RSI: 0000000001011200 RDI: 000000000002b550
Oct 10 09:58:12 XPS-13 kernel: [65888.126017] RBP: ffffa0c5c31c3648 R08: ffff8e879f4ab550 R09: 0000000000000000
Oct 10 09:58:12 XPS-13 kernel: [65888.126019] R10: ffffa0c5c31c3870 R11: ffffffffc03b5000 R12: 0000000001011200
Oct 10 09:58:12 XPS-13 kernel: [65888.126021] R13: ffff8e879529bb00 R14: 919a70ed5ff573cf R15: ffff8e879529bb00
Oct 10 09:58:12 XPS-13 kernel: [65888.126024] FS: 00007f619aa61700(0000) GS:ffff8e879f480000(0000) knlGS:0000000000000000
Oct 10 09:58:12 XPS-13 kernel: [65888.126026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Oct 10 09:58:12 XPS-13 kernel: [65888.126028] CR2: 0000027487e30010 CR3: 000000020e62c004 CR4: 00000000003626e0
Oct 10 09:58:12 XPS-13 kernel: [65888.126030] Call Trace:
Oct 10 09:58:12 XPS-13 kernel: [65888.126036] ? mempool_alloc_slab+0x15/0x20
Oct 10 09:58:12 XPS-13 kernel: [65888.126041] ? wait_woken+0x80/0x80
Oct 10 09:58:12 XPS-13 kernel: [65888.126044] mempool_alloc_slab+0x15/0x20
Oct 10 09:58:12 XPS-13 kernel: [65888.126046] mempool_alloc+0x71/0x190
Oct 10 09:58:12 XPS-13 kernel: [65888.126049] ? mempool_alloc_slab+0x15/0x20
Oct 10 09:58:12 XPS-13 kernel: [65888.126051] ? mempool_alloc_slab+0x15/0x20
Oct 10 09:58:12 XPS-13 kernel: [65888.126068] cifs_small_buf_get+0x1a/0x30 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126081] small_smb2_init+0x62/0xb0 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126092] SMB2_open+0xc3/0xb50 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126103] ? cifsConvertToUTF16+0x1e9/0x420 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126106] ? wait_woken+0x80/0x80
Oct 10 09:58:12 XPS-13 kernel: [65888.126116] ? cifs_strndup_to_utf16+0xbd/0x110 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126127] smb2_open_op_close+0xad/0x220 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126137] ? smb2_open_op_close+0xad/0x220 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126141] ? alloc_pages_current+0x6a/0xe0
Oct 10 09:58:12 XPS-13 kernel: [65888.126151] smb2_query_path_info+0x74/0xf0 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126161] cifs_get_inode_info+0x4eb/0xab0 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126164] ? ktime_get+0x43/0xa0
Oct 10 09:58:12 XPS-13 kernel: [65888.126174] ? build_path_from_dentry_optional_prefix+0x179/0x3e0 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126184] cifs_revalidate_dentry_attr+0x1d8/0x250 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126194] cifs_revalidate_dentry+0x13/0x30 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126203] cifs_d_revalidate+0x27/0xb0 [cifs]
Oct 10 09:58:12 XPS-13 kernel: [65888.126206] d_revalidate.part.18+0x10/0x20
Oct 10 09:58:12 XPS-13 kernel: [65888.126208] lookup_fast+0x307/0x320
Oct 10 09:58:12 XPS-13 kernel: [65888.126210] walk_component+0x49/0x470
Oct 10 09:58:12 XPS-13 kernel: [65888.126213] link_path_walk+0x1bc/0x5a0
Oct 10 09:58:12 XPS-13 kernel: [65888.126215] ? path_init+0x177/0x2f0
Oct 10 09:58:12 XPS-13 kernel: [65888.126217] path_lookupat+0x56/0x1f0
Oct 10 09:58:12 XPS-13 kernel: [65888.126220] ? __switch_to_asm+0x40/0x70
Oct 10 09:58:12 XPS-13 kernel: [65888.126223] ? __switch_to_asm+0x34/0x70
Oct 10 09:58:12 XPS-13 kernel: [65888.126225] ? __switch_to_asm+0x40/0x70
Oct 10 09:58:12 XPS-13 kernel: [65888.126227] ? __switch_to_asm+0x34/0x70
Oct 10 09:58:12 XPS-13 kernel: [65888.126230] filename_lookup+0xb6/0x190
Oct 10 09:58:12 XPS-13 kernel: [65888.126233] ? __check_object_size+0xaf/0x1b0
Oct 10 09:58:12 XPS-13 kernel: [65888.126236] ? strncpy_from_user+0x4d/0x170
Oct 10 09:58:12 XPS-13 kernel: [65888.126239] user_path_at_empty+0x36/0x40
Oct 10 09:58:12 XPS-13 kernel: [65888.126241] ? user_path_at_empty+0x36/0x40
Oct 10 09:58:12 XPS-13 kernel: [65888.126244] vfs_statx+0x76/0xe0
Oct 10 09:58:12 XPS-13 kernel: [65888.126247] SYSC_newstat+0x3d/0x70
Oct 10 09:58:12 XPS-13 kernel: [65888.126250] SyS_newstat+0xe/0x10
Oct 10 09:58:12 XPS-13 kernel: [65888.126253] do_syscall_64+0x73/0x130
Oct 10 09:58:12 XPS-13 kernel: [65888.126255] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
Oct 10 09:58:12 XPS-13 kernel: [65888.126257] RIP: 0033:0x7f621f0c3775
Oct 10 09:58:12 XPS-13 kernel: [65888.126259] RSP: 002b:00007f619aa60838 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
Oct 10 09:58:12 XPS-13 kernel: [65888.126261] RAX: ffffffffffffffda RBX: 00007f6190022810 RCX: 00007f621f0c3775
Oct 10 09:58:12 XPS-13 kernel: [65888.126263] RDX: 00007f619aa60860 RSI: 00007f619aa60860 RDI: 00007f6190022810
Oct 10 09:58:12 XPS-13 kernel: [65888.126264] RBP: 00007f619aa60920 R08: 0000000000000000 R09: 000000000000000a
Oct 10 09:58:12 XPS-13 kernel: [65888.126265] R10: 00007f6190021621 R11: 0000000000000246 R12: 00007f619aa60980
Oct 10 09:58:12 XPS-13 kernel: [65888.126267] R13: 0000000000000001 R14: 00007f619aa60860 R15: 00007f619aa60b5c
Oct 10 09:58:12 XPS-13 kernel: [65888.126269] Code: 87 3c 7b 49 83 78 10 00 4d 8b 30 0f 84 00 01 00 00 4d 85 f6 0f 84 f7 00 00 00 49 63 5f 20 49 8b 3f 48 8d 4a 01 4c 89 f0 4c 01 f3 <48> 33 1b 49 33 9f 40 01 00 00 65 48 0f c7 0f 0f 94 c0 84 c0 74
Oct 10 09:58:12 XPS-13 kernel: [65888.126300] RIP: kmem_cache_alloc+0x81/0x1b0 RSP: ffffa0c5c31c3618
Oct 10 09:58:12 XPS-13 kernel: [65888.126303] ---[ end trace 627321c99ee3a258 ]--
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