This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1811723 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags added: bionic -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1811723 Title: Samba client freeze during write when using higher than vers=1.0 Status in linux package in Ubuntu: Incomplete Bug description: Hello, My issue is that whenever I try to write new files (copy or move) to my file server something in the samba client freezes and I can't do anything samba until the system is rebooted. To get write access I mount with uid ie "sudo mount //server/share /mountpoint -o user=write,uid=1000". Using this command the server and client negotiates smb protocol version 3.02. When this happens the server is still happily serving files to other machines. If I just read files everything works fine. If I connect from a windows client there is no issue. If I add "vers=1.0" everything works but transfers are really slow. Specifying version 3 produces a fail. Trying the same operation (different hw) with Mint 18 Mate produces the same fault. Trying the same operation (with "vers=3.0" set) using SuSE Leap 15.0 KDE live everything works as expected. Both client and server are running fully updated, as of posting, bionic. Using 'dmesg -w' too see what's going on I can see that there is a general protection fault somehow related to cifsd. I am however unable to tell if it is relevant to my issue, from kern.log: Jan 9 21:03:49 ubnu kernel: [ 410.357213] general protection fault: 0000 [#1] SMP PTI Jan 9 21:03:49 ubnu kernel: [ 410.357224] Modules linked in: cmac arc4 md4 nls_utf8 cifs ccm fscache rfcomm pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) thunderbolt bnep binfmt_misc nls_iso8859_1 snd_hda_codec_hdmi snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core snd_soc_sst_dsp snd_soc_sst_ipc snd_hda_codec_realtek snd_soc_acpi snd_hda_codec_generic snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel intel_rapl btusb x86_pkg_temp_thermal intel_powerclamp btrtl coretemp joydev btbcm snd_hda_codec kvm_intel input_leds kvm irqbypass btintel crct10dif_pclmul crc32_pclmul snd_hda_core ghash_clmulni_intel pcbc snd_hwdep snd_pcm bluetooth ecdh_generic snd_seq_midi snd_seq_midi_event aesni_intel snd_rawmidi aes_x86_64 crypto_simd glue_helper cryptd intel_cstate intel_rapl_perf snd_seq rtsx_pci_ms snd_seq_device Jan 9 21:03:49 ubnu kernel: [ 410.357357] wmi_bmof snd_timer memstick intel_wmi_thunderbolt snd shpchp soundcore mei_me mei intel_pch_thermal acpi_pad mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 xfs libcrc32c hid_generic usbhid hid rtsx_pci_sdmmc i915 e1000e i2c_algo_bit drm_kms_helper ptp syscopyarea pps_core i2c_i801 sysfillrect sysimgblt rtsx_pci fb_sys_fops drm ahci libahci wmi video Jan 9 21:03:49 ubnu kernel: [ 410.357447] CPU: 2 PID: 1822 Comm: cifsd Tainted: G OE 4.15.0-43-generic #46-Ubuntu Jan 9 21:03:49 ubnu kernel: [ 410.357453] Hardware name: /NUC7i3BNB, BIOS BNKBL357.86A.0069.2018.0920.1250 09/20/2018 Jan 9 21:03:49 ubnu kernel: [ 410.357468] RIP: 0010:prefetch_freepointer+0x15/0x30 Jan 9 21:03:49 ubnu kernel: [ 410.357474] RSP: 0018:ffffb16201ae3da0 EFLAGS: 00010282 Jan 9 21:03:49 ubnu kernel: [ 410.357482] RAX: 0000000000000000 RBX: e90527c744fff71a RCX: 0000000000003ea9 Jan 9 21:03:49 ubnu kernel: [ 410.357488] RDX: 0000000000003ea8 RSI: e90527c744fff71a RDI: ffff9d7079255080 Jan 9 21:03:49 ubnu kernel: [ 410.357494] RBP: ffffb16201ae3da0 R08: ffff9d707ed2b650 R09: ffffb16201ae3db0 Jan 9 21:03:49 ubnu kernel: [ 410.357499] R10: ffffb16201ae3de8 R11: 0000000000000000 R12: 0000000001011200 Jan 9 21:03:49 ubnu kernel: [ 410.357505] R13: ffff9d7079255080 R14: ffff9d7016478c40 R15: ffff9d7079255080 Jan 9 21:03:49 ubnu kernel: [ 410.357512] FS: 0000000000000000(0000) GS:ffff9d707ed00000(0000) knlGS:0000000000000000 Jan 9 21:03:49 ubnu kernel: [ 410.357519] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jan 9 21:03:49 ubnu kernel: [ 410.357525] CR2: 00007f0a2802d028 CR3: 000000003760a006 CR4: 00000000003606e0 Jan 9 21:03:49 ubnu kernel: [ 410.357530] Call Trace: Jan 9 21:03:49 ubnu kernel: [ 410.357545] kmem_cache_alloc+0xa2/0x1b0 Jan 9 21:03:49 ubnu kernel: [ 410.357558] ? mempool_alloc_slab+0x15/0x20 Jan 9 21:03:49 ubnu kernel: [ 410.357570] ? wait_woken+0x80/0x80 Jan 9 21:03:49 ubnu kernel: [ 410.357580] mempool_alloc_slab+0x15/0x20 Jan 9 21:03:49 ubnu kernel: [ 410.357590] mempool_alloc+0x71/0x190 Jan 9 21:03:49 ubnu kernel: [ 410.357660] ? smb2_add_credits+0xb0/0x250 [cifs] Jan 9 21:03:49 ubnu kernel: [ 410.357709] cifs_small_buf_get+0x1a/0x30 [cifs] Jan 9 21:03:49 ubnu kernel: [ 410.357751] cifs_demultiplex_thread+0x5c7/0xaf0 [cifs] Jan 9 21:03:49 ubnu kernel: [ 410.357762] ? __schedule+0x299/0x8a0 Jan 9 21:03:49 ubnu kernel: [ 410.357777] kthread+0x121/0x140 Jan 9 21:03:49 ubnu kernel: [ 410.357815] ? cifs_handle_standard+0x190/0x190 [cifs] Jan 9 21:03:49 ubnu kernel: [ 410.357827] ? kthread_create_worker_on_cpu+0x70/0x70 Jan 9 21:03:49 ubnu kernel: [ 410.357838] ? do_syscall_64+0x73/0x130 Jan 9 21:03:49 ubnu kernel: [ 410.357847] ? SyS_exit_group+0x14/0x20 Jan 9 21:03:49 ubnu kernel: [ 410.357859] ret_from_fork+0x35/0x40 Jan 9 21:03:49 ubnu kernel: [ 410.357866] Code: eb bb 49 8b 74 24 60 48 c7 c7 30 cd 0e a5 e8 93 b9 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 Jan 9 21:03:49 ubnu kernel: [ 410.357991] RIP: prefetch_freepointer+0x15/0x30 RSP: ffffb16201ae3da0 Jan 9 21:03:49 ubnu kernel: [ 410.358063] ---[ end trace 9fca55019e520b64 ]--- To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1811723/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp