Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.18 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.18 ** Changed in: linux (Ubuntu) Importance: Undecided => Medium ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1786382 Title: Repeated crashes in cifs kernel code Status in linux package in Ubuntu: Incomplete Bug description: While trying to write a bunch of files in quick succession to a CIFS filesystem on my Synology NAS, I start getting kernel oopses and the terminal windows in which I'm doing the file operations -- whose current directories are inside the CIFS filesystem -- suddenly crashing. For some reason apport is not picking up on this so I'm reporting manually. Here's one of the oopses: [ 871.470183] general protection fault: 0000 [#4] SMP PTI [ 871.470188] Modules linked in: rfcomm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 bridge stp llc devlink ebtable_filter ebtables pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cachefiles md4 nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 nls_utf8 cifs nfs lockd ccm grace fscache xt_multiport cmac bnep binfmt_misc ip6t_REJECT nf_reject_ipv6 nls_iso8859_1 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 xt_comment xt_limit xt_tcpudp snd_hda_codec_hdmi xt_addrtype intel_rapl sparse_keymap wmi_bmof x86_pkg_temp_thermal intel_powerclamp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack coretemp kvm_intel kvm snd_hda_codec_realtek arc4 snd_hda_codec_generic snd_hda_intel irqbypass uvcvideo snd_hda_codec btusb snd_usb_audio [ 871.470259] btrtl videobuf2_vmalloc snd_hda_core btbcm videobuf2_memops crct10dif_pclmul btintel snd_usbmidi_lib videobuf2_v4l2 snd_hwdep videobuf2_core bluetooth input_leds snd_seq_midi videodev snd_seq_midi_event snd_pcm crc32_pclmul snd_rawmidi media ghash_clmulni_intel ecdh_generic snd_seq cryptd intel_cstate snd_seq_device intel_rapl_perf iwlmvm mac80211 ip6table_filter ip6_tables snd_timer iwlwifi snd nf_conntrack_netbios_ns nvidia_uvm(POE) cfg80211 soundcore serio_raw nf_conntrack_broadcast shpchp wmi mei_me intel_pch_thermal acpi_pad mei mac_hid tpm_crb nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c sch_fq_codel iptable_filter parport_pc ppdev sunrpc lp parport ip_tables x_tables autofs4 hid_logitech_hidpp hid_generic hid_logitech_dj uas usbhid usb_storage hid dm_mirror dm_region_hash [ 871.470329] dm_log nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse drm r8169 ahci ipmi_devintf mii libahci ipmi_msghandler video [ 871.470351] CPU: 6 PID: 8614 Comm: nautilus Tainted: P D OE 4.15.0-30-generic #32-Ubuntu [ 871.470354] Hardware name: Acer Predator G6-710/Predator G6-710, BIOS R01-A4 05/18/2016 [ 871.470362] RIP: 0010:kmem_cache_alloc+0x81/0x1b0 [ 871.470365] RSP: 0018:ffffbbed47c9f618 EFLAGS: 00010202 [ 871.470369] RAX: 65b1b269c87f4446 RBX: 65b1b269c87f4446 RCX: 0000000000000ee9 [ 871.470372] RDX: 0000000000000ee8 RSI: 0000000001011200 RDI: 000000000002b5c0 [ 871.470375] RBP: ffffbbed47c9f648 R08: ffff9e312edab5c0 R09: 0000000000000000 [ 871.470378] R10: ffffbbed47c9f870 R11: ffffffffc1ab4000 R12: 0000000001011200 [ 871.470381] R13: ffff9e311bdbdb00 R14: 65b1b269c87f4446 R15: ffff9e311bdbdb00 [ 871.470385] FS: 00007f2f11675700(0000) GS:ffff9e312ed80000(0000) knlGS:0000000000000000 [ 871.470388] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 871.470391] CR2: 000055ba011c7100 CR3: 0000000451898004 CR4: 00000000003606e0 [ 871.470395] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 871.470398] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 871.470400] Call Trace: [ 871.470408] ? mempool_alloc_slab+0x15/0x20 [ 871.470415] ? wait_woken+0x80/0x80 [ 871.470419] mempool_alloc_slab+0x15/0x20 [ 871.470424] mempool_alloc+0x71/0x190 [ 871.470453] cifs_small_buf_get+0x1a/0x30 [cifs] [ 871.470482] small_smb2_init+0x62/0xb0 [cifs] [ 871.470511] SMB2_open+0xc3/0xb50 [cifs] [ 871.470535] ? cifsConvertToUTF16+0x1e9/0x420 [cifs] [ 871.470558] ? cifs_strndup_to_utf16+0xbd/0x110 [cifs] [ 871.470585] smb2_open_op_close+0xad/0x220 [cifs] [ 871.470609] ? smb2_open_op_close+0xad/0x220 [cifs] [ 871.470616] ? alloc_pages_current+0x6a/0xe0 [ 871.470640] smb2_query_path_info+0x74/0xf0 [cifs] [ 871.470667] cifs_get_inode_info+0x4eb/0xab0 [cifs] [ 871.470692] ? build_path_from_dentry_optional_prefix+0x179/0x3e0 [cifs] [ 871.470715] cifs_revalidate_dentry_attr+0x1d8/0x250 [cifs] [ 871.470739] cifs_revalidate_dentry+0x13/0x30 [cifs] [ 871.470760] cifs_d_revalidate+0x27/0xb0 [cifs] [ 871.470765] d_revalidate.part.18+0x10/0x20 [ 871.470770] lookup_fast+0x307/0x320 [ 871.470775] walk_component+0x49/0x470 [ 871.470780] link_path_walk+0x1bc/0x5a0 [ 871.470785] ? path_init+0x177/0x2f0 [ 871.470790] path_lookupat+0x56/0x1f0 [ 871.470795] filename_lookup+0xb6/0x190 [ 871.470801] ? try_to_wake_up+0x59/0x480 [ 871.470805] ? do_wp_page+0x159/0x5c0 [ 871.470811] ? __check_object_size+0xaf/0x1b0 [ 871.470817] ? strncpy_from_user+0x4d/0x170 [ 871.470823] user_path_at_empty+0x36/0x40 [ 871.470827] ? user_path_at_empty+0x36/0x40 [ 871.470832] vfs_statx+0x76/0xe0 [ 871.470837] ? strncpy_from_user+0x4d/0x170 [ 871.470842] SYSC_newlstat+0x3d/0x70 [ 871.470848] ? call_rcu_sched+0x17/0x20 [ 871.470852] ? __put_cred+0x3d/0x50 [ 871.470857] ? SyS_access+0x13d/0x230 [ 871.470863] SyS_newlstat+0xe/0x10 [ 871.470868] do_syscall_64+0x73/0x130 [ 871.470875] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 871.470879] RIP: 0033:0x7f2f39e5d815 [ 871.470882] RSP: 002b:00007f2f11674868 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 871.470886] RAX: ffffffffffffffda RBX: 00007f2f0000fd80 RCX: 00007f2f39e5d815 [ 871.470890] RDX: 00007f2f116748d0 RSI: 00007f2f116748d0 RDI: 00007f2f0000f4c0 [ 871.470893] RBP: 00007f2edc004c10 R08: 0000000000100006 R09: 00007f2f11674b20 [ 871.470896] R10: 00007f2f0000dda0 R11: 0000000000000246 R12: 00007f2f0000f4c0 [ 871.470899] R13: 00007f2f11674b20 R14: 00007f2f00037d10 R15: 00007f2f0000f4a0 [ 871.470903] Code: a0 9c 72 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 [ 871.470968] RIP: kmem_cache_alloc+0x81/0x1b0 RSP: ffffbbed47c9f618 [ 871.470999] ---[ end trace 74790e3ec93cb99e ]--- [ 871.684964] general protection fault: 0000 [#5] SMP PTI [ 871.684967] Modules linked in: rfcomm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 bridge stp llc devlink ebtable_filter ebtables pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cachefiles md4 nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 nls_utf8 cifs nfs lockd ccm grace fscache xt_multiport cmac bnep binfmt_misc ip6t_REJECT nf_reject_ipv6 nls_iso8859_1 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 xt_comment xt_limit xt_tcpudp snd_hda_codec_hdmi xt_addrtype intel_rapl sparse_keymap wmi_bmof x86_pkg_temp_thermal intel_powerclamp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack coretemp kvm_intel kvm snd_hda_codec_realtek arc4 snd_hda_codec_generic snd_hda_intel irqbypass uvcvideo snd_hda_codec btusb snd_usb_audio [ 871.684993] btrtl videobuf2_vmalloc snd_hda_core btbcm videobuf2_memops crct10dif_pclmul btintel snd_usbmidi_lib videobuf2_v4l2 snd_hwdep videobuf2_core bluetooth input_leds snd_seq_midi videodev snd_seq_midi_event snd_pcm crc32_pclmul snd_rawmidi media ghash_clmulni_intel ecdh_generic snd_seq cryptd intel_cstate snd_seq_device intel_rapl_perf iwlmvm mac80211 ip6table_filter ip6_tables snd_timer iwlwifi snd nf_conntrack_netbios_ns nvidia_uvm(POE) cfg80211 soundcore serio_raw nf_conntrack_broadcast shpchp wmi mei_me intel_pch_thermal acpi_pad mei mac_hid tpm_crb nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c sch_fq_codel iptable_filter parport_pc ppdev sunrpc lp parport ip_tables x_tables autofs4 hid_logitech_hidpp hid_generic hid_logitech_dj uas usbhid usb_storage hid dm_mirror dm_region_hash [ 871.685019] dm_log nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse drm r8169 ahci ipmi_devintf mii libahci ipmi_msghandler video [ 871.685028] CPU: 6 PID: 8637 Comm: nautilus Tainted: P D OE 4.15.0-30-generic #32-Ubuntu [ 871.685029] Hardware name: Acer Predator G6-710/Predator G6-710, BIOS R01-A4 05/18/2016 [ 871.685032] RIP: 0010:kmem_cache_alloc+0x81/0x1b0 [ 871.685033] RSP: 0018:ffffbbed47def618 EFLAGS: 00010202 [ 871.685034] RAX: 65b1b269c87f4446 RBX: 65b1b269c87f4446 RCX: 0000000000000ee9 [ 871.685035] RDX: 0000000000000ee8 RSI: 0000000001011200 RDI: 000000000002b5c0 [ 871.685036] RBP: ffffbbed47def648 R08: ffff9e312edab5c0 R09: 0000000000000000 [ 871.685037] R10: ffffbbed47def870 R11: ffffffffc1ab4000 R12: 0000000001011200 [ 871.685038] R13: ffff9e311bdbdb00 R14: 65b1b269c87f4446 R15: ffff9e311bdbdb00 [ 871.685039] FS: 00007f2efbfff700(0000) GS:ffff9e312ed80000(0000) knlGS:0000000000000000 [ 871.685040] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 871.685041] CR2: 00007f2f18040128 CR3: 0000000451898006 CR4: 00000000003606e0 [ 871.685042] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 871.685043] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 871.685044] Call Trace: [ 871.685048] ? mempool_alloc_slab+0x15/0x20 [ 871.685050] ? wait_woken+0x80/0x80 [ 871.685052] mempool_alloc_slab+0x15/0x20 [ 871.685053] mempool_alloc+0x71/0x190 [ 871.685065] cifs_small_buf_get+0x1a/0x30 [cifs] [ 871.685074] small_smb2_init+0x62/0xb0 [cifs] [ 871.685081] SMB2_open+0xc3/0xb50 [cifs] [ 871.685088] ? cifsConvertToUTF16+0x1e9/0x420 [cifs] [ 871.685094] ? cifs_strndup_to_utf16+0xbd/0x110 [cifs] [ 871.685101] smb2_open_op_close+0xad/0x220 [cifs] [ 871.685107] ? smb2_open_op_close+0xad/0x220 [cifs] [ 871.685110] ? alloc_pages_current+0x6a/0xe0 [ 871.685116] smb2_query_path_info+0x74/0xf0 [cifs] [ 871.685122] cifs_get_inode_info+0x4eb/0xab0 [cifs] [ 871.685128] ? build_path_from_dentry_optional_prefix+0x179/0x3e0 [cifs] [ 871.685135] cifs_revalidate_dentry_attr+0x1d8/0x250 [cifs] [ 871.685140] cifs_revalidate_dentry+0x13/0x30 [cifs] [ 871.685145] cifs_d_revalidate+0x27/0xb0 [cifs] [ 871.685148] d_revalidate.part.18+0x10/0x20 [ 871.685149] lookup_fast+0x307/0x320 [ 871.685150] walk_component+0x49/0x470 [ 871.685152] link_path_walk+0x1bc/0x5a0 [ 871.685153] ? path_init+0x177/0x2f0 [ 871.685155] path_lookupat+0x56/0x1f0 [ 871.685156] filename_lookup+0xb6/0x190 [ 871.685158] ? __check_object_size+0xaf/0x1b0 [ 871.685161] ? strncpy_from_user+0x4d/0x170 [ 871.685162] user_path_at_empty+0x36/0x40 [ 871.685164] ? user_path_at_empty+0x36/0x40 [ 871.685165] vfs_statx+0x76/0xe0 [ 871.685167] ? strncpy_from_user+0x4d/0x170 [ 871.685168] SYSC_newlstat+0x3d/0x70 [ 871.685170] ? call_rcu_sched+0x17/0x20 [ 871.685172] ? __put_cred+0x3d/0x50 [ 871.685173] ? SyS_access+0x13d/0x230 [ 871.685175] SyS_newlstat+0xe/0x10 [ 871.685177] do_syscall_64+0x73/0x130 [ 871.685179] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 871.685181] RIP: 0033:0x7f2f39e5d815 [ 871.685182] RSP: 002b:00007f2efbffe868 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 871.685183] RAX: ffffffffffffffda RBX: 00007f2f1800ab30 RCX: 00007f2f39e5d815 [ 871.685184] RDX: 00007f2efbffe8d0 RSI: 00007f2efbffe8d0 RDI: 00007f2f18002a60 [ 871.685185] RBP: 00007f2ee0003ef0 R08: 0000000000100006 R09: 00007f2efbffeb20 [ 871.685185] R10: 0000000000000008 R11: 0000000000000246 R12: 00007f2f18002a60 [ 871.685186] R13: 00007f2efbffeb20 R14: 00007f2f180092d0 R15: 00007f2f1800c7d0 [ 871.685187] Code: a0 9c 72 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 [ 871.685207] RIP: kmem_cache_alloc+0x81/0x1b0 RSP: ffffbbed47def618 [ 871.685208] ---[ end trace 74790e3ec93cb99f ]--- [ 871.856078] general protection fault: 0000 [#6] SMP PTI [ 871.856080] Modules linked in: rfcomm xt_CHECKSUM iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 bridge stp llc devlink ebtable_filter ebtables pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) cachefiles md4 nfsv3 nfs_acl rpcsec_gss_krb5 auth_rpcgss nfsv4 nls_utf8 cifs nfs lockd ccm grace fscache xt_multiport cmac bnep binfmt_misc ip6t_REJECT nf_reject_ipv6 nls_iso8859_1 xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 xt_comment xt_limit xt_tcpudp snd_hda_codec_hdmi xt_addrtype intel_rapl sparse_keymap wmi_bmof x86_pkg_temp_thermal intel_powerclamp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack coretemp kvm_intel kvm snd_hda_codec_realtek arc4 snd_hda_codec_generic snd_hda_intel irqbypass uvcvideo snd_hda_codec btusb snd_usb_audio [ 871.856110] btrtl videobuf2_vmalloc snd_hda_core btbcm videobuf2_memops crct10dif_pclmul btintel snd_usbmidi_lib videobuf2_v4l2 snd_hwdep videobuf2_core bluetooth input_leds snd_seq_midi videodev snd_seq_midi_event snd_pcm crc32_pclmul snd_rawmidi media ghash_clmulni_intel ecdh_generic snd_seq cryptd intel_cstate snd_seq_device intel_rapl_perf iwlmvm mac80211 ip6table_filter ip6_tables snd_timer iwlwifi snd nf_conntrack_netbios_ns nvidia_uvm(POE) cfg80211 soundcore serio_raw nf_conntrack_broadcast shpchp wmi mei_me intel_pch_thermal acpi_pad mei mac_hid tpm_crb nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack libcrc32c sch_fq_codel iptable_filter parport_pc ppdev sunrpc lp parport ip_tables x_tables autofs4 hid_logitech_hidpp hid_generic hid_logitech_dj uas usbhid usb_storage hid dm_mirror dm_region_hash [ 871.856142] dm_log nvidia_drm(POE) nvidia_modeset(POE) nvidia(POE) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse drm r8169 ahci ipmi_devintf mii libahci ipmi_msghandler video [ 871.856152] CPU: 6 PID: 8653 Comm: nautilus Tainted: P D OE 4.15.0-30-generic #32-Ubuntu [ 871.856153] Hardware name: Acer Predator G6-710/Predator G6-710, BIOS R01-A4 05/18/2016 [ 871.856157] RIP: 0010:kmem_cache_alloc+0x81/0x1b0 [ 871.856158] RSP: 0018:ffffbbed47dff618 EFLAGS: 00010202 [ 871.856160] RAX: 65b1b269c87f4446 RBX: 65b1b269c87f4446 RCX: 0000000000000ee9 [ 871.856161] RDX: 0000000000000ee8 RSI: 0000000001011200 RDI: 000000000002b5c0 [ 871.856162] RBP: ffffbbed47dff648 R08: ffff9e312edab5c0 R09: 0000000000000000 [ 871.856163] R10: ffffbbed47dff870 R11: ffffffffc1ab4000 R12: 0000000001011200 [ 871.856165] R13: ffff9e311bdbdb00 R14: 65b1b269c87f4446 R15: ffff9e311bdbdb00 [ 871.856166] FS: 00007f2efb7fe700(0000) GS:ffff9e312ed80000(0000) knlGS:0000000000000000 [ 871.856168] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 871.856169] CR2: 00007f2ee403c108 CR3: 0000000451898004 CR4: 00000000003606e0 [ 871.856170] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 871.856172] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 871.856172] Call Trace: [ 871.856177] ? mempool_alloc_slab+0x15/0x20 [ 871.856180] ? wait_woken+0x80/0x80 [ 871.856182] mempool_alloc_slab+0x15/0x20 [ 871.856184] mempool_alloc+0x71/0x190 [ 871.856199] cifs_small_buf_get+0x1a/0x30 [cifs] [ 871.856210] small_smb2_init+0x62/0xb0 [cifs] [ 871.856221] SMB2_open+0xc3/0xb50 [cifs] [ 871.856230] ? cifsConvertToUTF16+0x1e9/0x420 [cifs] [ 871.856239] ? cifs_strndup_to_utf16+0xbd/0x110 [cifs] [ 871.856248] smb2_open_op_close+0xad/0x220 [cifs] [ 871.856257] ? smb2_open_op_close+0xad/0x220 [cifs] [ 871.856260] ? alloc_pages_current+0x6a/0xe0 [ 871.856268] smb2_query_path_info+0x74/0xf0 [cifs] [ 871.856277] cifs_get_inode_info+0x4eb/0xab0 [cifs] [ 871.856286] ? build_path_from_dentry_optional_prefix+0x179/0x3e0 [cifs] [ 871.856296] cifs_revalidate_dentry_attr+0x1d8/0x250 [cifs] [ 871.856304] cifs_revalidate_dentry+0x13/0x30 [cifs] [ 871.856312] cifs_d_revalidate+0x27/0xb0 [cifs] [ 871.856314] d_revalidate.part.18+0x10/0x20 [ 871.856316] lookup_fast+0x307/0x320 [ 871.856318] walk_component+0x49/0x470 [ 871.856320] link_path_walk+0x1bc/0x5a0 [ 871.856322] ? path_init+0x177/0x2f0 [ 871.856324] path_lookupat+0x56/0x1f0 [ 871.856326] filename_lookup+0xb6/0x190 [ 871.856328] ? __check_object_size+0xaf/0x1b0 [ 871.856331] ? strncpy_from_user+0x4d/0x170 [ 871.856333] user_path_at_empty+0x36/0x40 [ 871.856335] ? user_path_at_empty+0x36/0x40 [ 871.856337] vfs_statx+0x76/0xe0 [ 871.856339] ? strncpy_from_user+0x4d/0x170 [ 871.856341] SYSC_newlstat+0x3d/0x70 [ 871.856344] ? call_rcu_sched+0x17/0x20 [ 871.856346] ? __put_cred+0x3d/0x50 [ 871.856348] ? SyS_access+0x13d/0x230 [ 871.856350] SyS_newlstat+0xe/0x10 [ 871.856352] do_syscall_64+0x73/0x130 [ 871.856355] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 [ 871.856356] RIP: 0033:0x7f2f39e5d815 [ 871.856357] RSP: 002b:00007f2efb7fd868 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 [ 871.856359] RAX: ffffffffffffffda RBX: 00007f2ee4005b90 RCX: 00007f2f39e5d815 [ 871.856360] RDX: 00007f2efb7fd8d0 RSI: 00007f2efb7fd8d0 RDI: 00007f2ee4000c90 [ 871.856360] RBP: 00007f2ee4005920 R08: 0000000000100006 R09: 00007f2efb7fdb20 [ 871.856361] R10: 00007f2ee4001470 R11: 0000000000000246 R12: 00007f2ee4000c90 [ 871.856362] R13: 00007f2efb7fdb20 R14: 00007f2ee403bcc0 R15: 00007f2ee40063b0 [ 871.856363] Code: a0 9c 72 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 [ 871.856382] RIP: kmem_cache_alloc+0x81/0x1b0 RSP: ffffbbed47dff618 [ 871.856384] ---[ end trace 74790e3ec93cb9a0 ]--- It's happening repeatedly. I'm not sure what else to tell you. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-30-generic 4.15.0-30.32 ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18 Uname: Linux 4.15.0-30-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: jik 4719 F.... pulseaudio /dev/snd/controlC1: jik 4719 F.... pulseaudio /dev/snd/controlC0: jik 4719 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Thu Aug 9 22:16:46 2018 InstallationDate: Installed on 2016-01-16 (937 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) MachineType: Acer Predator G6-710 ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-30-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-30-generic N/A linux-backports-modules-4.15.0-30-generic N/A linux-firmware 1.173.1 SourcePackage: linux UpgradeStatus: Upgraded to bionic on 2018-04-19 (112 days ago) dmi.bios.date: 05/18/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: R01-A4 dmi.board.name: Predator G6-710 dmi.board.vendor: Acer dmi.chassis.type: 3 dmi.chassis.vendor: Acer dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR01-A4:bd05/18/2016:svnAcer:pnPredatorG6-710:pvr:rvnAcer:rnPredatorG6-710:rvr:cvnAcer:ct3:cvr: dmi.product.family: Acer Desktop dmi.product.name: Predator G6-710 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1786382/+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
