Bug 219097
| Summary: | BUG: Dentry 00000000a32a9144{i=71,n=/} still in use (2) [unmount of cifs cifs] / Busy inodes after unmount of cifs | ||
|---|---|---|---|
| Product: | File System | Reporter: | Alexander Goomenyuk (emerg.reanimator) |
| Component: | CIFS | Assignee: | fs_cifs (fs_cifs) |
| Status: | RESOLVED UNREPRODUCIBLE | ||
| Severity: | normal | CC: | smfrench |
| Priority: | P3 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | Subsystem: | ||
| Regression: | No | Bisected commit-id: | |
What is the server type? I want to be able to rule out freeing the directory cache on umount. Do you know if it is reproducible on current mainline (6.11-rc1) > What is the server type? I want to be able to rule out freeing the directory
> cache on umount.
If I am not mistaken it must be a DFS cluster.
> Do you know if it is reproducible on current mainline (6.11-rc1) I may try that one 0.rc0.20240720gt3c3ff7be.307.vanilla.fc40 later this week https://copr.fedorainfracloud.org/coprs/g/kernel-vanilla/mainline/ (In reply to Steve French from comment #1) > What is the server type? I want to be able to rule out freeing the directory > cache on umount. Do you know if it is reproducible on current mainline > (6.11-rc1) Tried two kernels Here are the steps performed: - Established the VPN connection - Mounted the DFS share - Listing of the directories under the share works fine. - Disconnected from VPN: shutdown the VPN client - Connected the VPN once again. - Listing of the directories under the share does not works any more. The CIFS kernel layer tries to restore the connection in vain continuously. 1) 6.11.0-0.rc1.20240731gte4fc196f.317.vanilla.fc40.x86_64 2) 6.11.0-0.rc1.20240802gtc0ecd638.319.vanilla.fc40.x86_64; The kernels behaves in the same way. No kernel crashes observed, but the whole network stack is broken. I am not able to restart any systemd service. Even reboot ends up with a timeout. [ 530.362847] CIFS: fs/smb/client/connect.c: __reconnect_target_unlocked: reconn_set_ipaddr_from_hostname: rc=-4 [ 530.362851] CIFS: fs/smb/client/connect.c: generic_ip_connect: connecting to <server D IP0>:445 [ 530.362867] CIFS: fs/smb/client/connect.c: Socket created [ 530.362870] CIFS: fs/smb/client/connect.c: sndbuf 16384 rcvbuf 131072 rcvtimeo 0x1b58 [ 532.918825] CIFS: fs/smb/client/connect.c: Error -115 connecting to server [ 532.918858] CIFS: fs/smb/client/connect.c: __cifs_reconnect: reconnect error -115 [ 534.454864] CIFS: fs/smb/client/connect.c: Error -115 connecting to server [ 534.454897] CIFS: fs/smb/client/connect.c: reconnect_dfs_server: reconnect error -115 [ 535.478763] CIFS: fs/smb/client/connect.c: Error -115 connecting to server [ 535.478798] CIFS: fs/smb/client/connect.c: reconnect_dfs_server: reconnect error -115 [ 535.478810] CIFS: fs/smb/client/connect.c: Error -115 connecting to server [ 535.478840] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: probably server name is whole unc: \\<server name A> [ 535.482909] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: unable to resolve: <server name A> [ 535.482920] CIFS: fs/smb/client/connect.c: reconn_set_ipaddr_from_hostname: failed to resolve server part of <server name A> to IP: -4 [ 535.482926] CIFS: fs/smb/client/connect.c: __reconnect_target_unlocked: reconn_set_ipaddr_from_hostname: rc=-4 [ 535.482930] CIFS: fs/smb/client/connect.c: generic_ip_connect: connecting to <server D IP0>:445 [ 535.482949] CIFS: fs/smb/client/connect.c: Socket created [ 535.482952] CIFS: fs/smb/client/connect.c: sndbuf 16384 rcvbuf 131072 rcvtimeo 0x1b58 [ 535.926757] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: probably server name is whole unc: \\<server C IP0> [ 535.926769] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: unc is IP, skipping dns upcall: <server C IP0> [ 535.926774] CIFS: fs/smb/client/connect.c: __cifs_reconnect: reconn_set_ipaddr_from_hostname: rc=0 [ 535.926779] CIFS: fs/smb/client/connect.c: generic_ip_connect: connecting to <server C IP0>:445 [ 535.926801] CIFS: fs/smb/client/connect.c: Socket created [ 535.926804] CIFS: fs/smb/client/connect.c: sndbuf 16384 rcvbuf 131072 rcvtimeo 0x1b58 [ 537.462810] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: probably server name is whole unc: \\<server name B> [ 537.467367] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: unable to resolve: <server name B> [ 537.467378] CIFS: fs/smb/client/connect.c: reconn_set_ipaddr_from_hostname: failed to resolve server part of <server name B> to IP: -4 [ 537.467384] CIFS: fs/smb/client/connect.c: __reconnect_target_unlocked: reconn_set_ipaddr_from_hostname: rc=-4 [ 537.467388] CIFS: fs/smb/client/connect.c: generic_ip_connect: connecting to <server B IP0>:445 [ 537.467406] CIFS: fs/smb/client/connect.c: Socket created [ 537.467409] CIFS: fs/smb/client/connect.c: sndbuf 16384 rcvbuf 131072 rcvtimeo 0x1b58 [ 538.486785] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: probably server name is whole unc: \\<server name B> [ 538.491197] CIFS: fs/smb/client/dns_resolve.c: dns_resolve_server_name_to_ip: unable to resolve: <server name B> [ 538.491207] CIFS: fs/smb/client/connect.c: reconn_set_ipaddr_from_hostname: failed to resolve server part of <server name B> to IP: -4 [ 538.491213] CIFS: fs/smb/client/connect.c: __reconnect_target_unlocked: reconn_set_ipaddr_from_hostname: rc=-4 [ 538.491217] CIFS: fs/smb/client/connect.c: generic_ip_connect: connecting to <server B IP1>:445 Closing the bug report since I am not able to reproduce it reliably any more. |
The crash happens every time on unmounting of the CIFS share after the network connection was lost (e.g. resuming the machine from suspend mode). -------------------------------- Kernel: 6.9.10-200.fc40.x86_64 -------------------------------- dmesg -------------------------------- [10997.775041] r8169 0000:0a:00.0 enp10s0: Link is Down [11001.044472] e1000e 0000:00:19.0 enp0s25: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [11101.192433] CIFS: VFS: \\<CIFS server FQDN> has not responded in 180 seconds. Reconnecting... [11115.528190] CIFS: VFS: \\<CIFS server IP> has not responded in 180 seconds. Reconnecting... [11215.102038] ------------[ cut here ]------------ [11215.102045] BUG: Dentry 00000000a32a9144{i=71,n=/} still in use (2) [unmount of cifs cifs] [11215.102068] WARNING: CPU: 18 PID: 42528 at fs/dcache.c:1528 umount_check+0x56/0x70 [11215.102081] Modules linked in: nls_utf8 cifs cifs_arc4 nls_ucs2_utils cifs_md4 dns_resolver netfs snd_seq_dummy snd_hrtimer vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfkill nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nvidia_drm(POE) nft_ct nvidia_modeset(POE) nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nvidia_uvm(POE) ip_set nf_tables qrtr nvidia(POE) tun sunrpc intel_rapl_msr intel_rapl_common binfmt_misc intel_uncore_frequency intel_uncore_frequency_common sb_edac x86_pkg_temp_thermal intel_powerclamp uvcvideo coretemp snd_hda_codec_realtek uvc snd_hda_codec_generic snd_hda_codec_hdmi videobuf2_vmalloc snd_usb_audio videobuf2_memops kvm_intel snd_hda_scodec_component snd_hda_intel videobuf2_v4l2 vfat pktcdvd typec_displayport fat snd_usbmidi_lib snd_intel_dspcfg kvm videobuf2_common snd_intel_sdw_acpi snd_ump videodev snd_hda_codec rapl snd_rawmidi intel_cstate mc joydev snd_hda_core snd_hwdep snd_seq snd_seq_device mei_wdt iTCO_wdt [11215.102193] intel_pmc_bxt snd_pcm iTCO_vendor_support dell_smm_hwmon dell_smbios dcdbas mei_me snd_timer intel_uncore e1000e dell_wmi_descriptor wmi_bmof intel_wmi_thunderbolt r8169 snd mei i2c_i801 realtek soundcore i2c_smbus lpc_ich i2c_nvidia_gpu loop nfnetlink zram amdgpu video amdxcp i2c_algo_bit drm_ttm_helper ttm drm_exec gpu_sched drm_suballoc_helper drm_buddy drm_display_helper ucsi_ccg crct10dif_pclmul crc32_pclmul crc32c_intel typec_ucsi polyval_clmulni polyval_generic mxm_wmi ghash_clmulni_intel sha512_ssse3 sha256_ssse3 sha1_ssse3 cec typec ata_generic pata_acpi wmi ip6_tables ip_tables fuse [11215.102296] CPU: 18 PID: 42528 Comm: umount Tainted: P W OE 6.9.10-200.fc40.x86_64 #1 [11215.102302] Hardware name: Dell Inc. Precision Tower 5810/0K240Y, BIOS A34 10/19/2020 [11215.102305] RIP: 0010:umount_check+0x56/0x70 [11215.102311] Code: 8d 88 c0 03 00 00 48 8b 40 28 4c 8b 08 48 8b 46 30 48 85 c0 74 04 48 8b 50 40 51 48 c7 c7 18 c7 b6 ac 48 89 f1 e8 3a a3 c3 ff <0f> 0b 58 31 c0 c3 cc cc cc cc 41 83 f8 01 75 bf eb ad 0f 1f 84 00 [11215.102315] RSP: 0018:ffffb75f8d7afaa8 EFLAGS: 00010286 [11215.102321] RAX: 0000000000000000 RBX: 0000000000005560 RCX: 0000000000000027 [11215.102324] RDX: ffff95170f1218c8 RSI: 0000000000000001 RDI: ffff95170f1218c0 [11215.102327] RBP: ffff94f974e42540 R08: 0000000000000000 R09: 303030207972746e [11215.102330] R10: 3d697b3434313961 R11: 3233613030303030 R12: ffffffffab4e95d0 [11215.102333] R13: ffff94fbaf8f1000 R14: 0000000000000000 R15: 0000000000000000 [11215.102336] FS: 00007f7b26a48800(0000) GS:ffff95170f100000(0000) knlGS:0000000000000000 [11215.102340] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [11215.102343] CR2: 00007f7b26ce3060 CR3: 00000006e49d8002 CR4: 00000000003706f0 [11215.102347] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [11215.102349] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [11215.102352] Call Trace: [11215.102356] <TASK> [11215.102358] ? umount_check+0x56/0x70 [11215.102363] ? __warn.cold+0x8e/0xe8 [11215.102373] ? umount_check+0x56/0x70 [11215.102381] ? report_bug+0xff/0x140 [11215.102390] ? console_unlock+0x84/0x130 [11215.102397] ? handle_bug+0x3c/0x80 [11215.102405] ? exc_invalid_op+0x17/0x70 [11215.102411] ? asm_exc_invalid_op+0x1a/0x20 [11215.102419] ? __pfx_umount_check+0x10/0x10 [11215.102425] ? umount_check+0x56/0x70 [11215.102430] ? umount_check+0x56/0x70 [11215.102434] d_walk+0x61/0x280 [11215.102440] shrink_dcache_for_umount+0x4d/0x130 [11215.102451] generic_shutdown_super+0x22/0x100 [11215.102461] kill_anon_super+0x16/0x40 [11215.102469] cifs_kill_sb+0x46/0x50 [cifs] [11215.102704] deactivate_locked_super+0x33/0xb0 [11215.102710] cleanup_mnt+0xba/0x150 [11215.102718] task_work_run+0x5c/0x90 [11215.102729] syscall_exit_to_user_mode+0x21a/0x220 [11215.102739] do_syscall_64+0x8e/0x160 [11215.102745] ? avc_has_perm_noaudit+0x6b/0xf0 [11215.102753] ? selinux_inode_permission+0x131/0x1c0 [11215.102763] ? mntput_no_expire+0x4a/0x260 [11215.102769] ? do_faccessat+0x1e4/0x2e0 [11215.102776] ? syscall_exit_to_user_mode+0x72/0x220 [11215.102782] ? do_syscall_64+0x8e/0x160 [11215.102787] ? do_syscall_64+0x8e/0x160 [11215.102792] ? vfs_fstatat+0x94/0xb0 [11215.102799] ? __do_sys_newfstatat+0x3c/0x80 [11215.102807] ? syscall_exit_to_user_mode+0x72/0x220 [11215.102813] ? do_syscall_64+0x8e/0x160 [11215.102818] ? syscall_exit_to_user_mode+0x72/0x220 [11215.102823] ? do_syscall_64+0x8e/0x160 [11215.102828] ? syscall_exit_to_user_mode+0x72/0x220 [11215.102834] ? do_syscall_64+0x8e/0x160 [11215.102838] ? exc_page_fault+0x7e/0x180 [11215.102844] entry_SYSCALL_64_after_hwframe+0x76/0x7e [11215.102851] RIP: 0033:0x7f7b26c701eb [11215.102883] Code: c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 f9 ab 0c 00 f7 d8 [11215.102887] RSP: 002b:00007fffee5fa338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [11215.102892] RAX: 0000000000000000 RBX: 000055f6903e2550 RCX: 00007f7b26c701eb [11215.102895] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055f6903e7ac0 [11215.102898] RBP: 00007fffee5fa410 R08: 000055f6903e1010 R09: 0000000000000007 [11215.102900] R10: 0000000000000000 R11: 0000000000000246 R12: 000055f6903e2658 [11215.102903] R13: 0000000000000000 R14: 000055f6903e7ac0 R15: 000055f6903e7a90 [11215.102908] </TASK> [11215.102911] ---[ end trace 0000000000000000 ]--- [11215.102922] VFS: Busy inodes after unmount of cifs (cifs) [11215.102933] ------------[ cut here ]------------ [11215.102936] kernel BUG at fs/super.c:649! [11215.102946] invalid opcode: 0000 [#1] PREEMPT SMP PTI [11215.102953] CPU: 18 PID: 42528 Comm: umount Tainted: P W OE 6.9.10-200.fc40.x86_64 #1 [11215.102959] Hardware name: Dell Inc. Precision Tower 5810/0K240Y, BIOS A34 10/19/2020 [11215.102961] RIP: 0010:generic_shutdown_super.cold+0x1a/0x1c [11215.102972] Code: c7 c7 e8 c2 b6 ac 48 8b 30 e8 d3 9b fe ff 0f 0b 48 8b 43 28 48 8d b3 c0 03 00 00 48 c7 c7 48 c3 b6 ac 48 8b 10 e8 b7 9b fe ff <0f> 0b 0f b6 d1 be 01 00 00 00 48 c7 c7 a0 da 63 ad 88 4c 24 07 e8 [11215.102977] RSP: 0018:ffffb75f8d7afb30 EFLAGS: 00010246 [11215.102981] RAX: 000000000000002d RBX: ffff94fbaf8f1000 RCX: 0000000000000027 [11215.102985] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff95170f1218c0 [11215.102989] RBP: ffffffffc64dfee0 R08: 0000000000000000 R09: ffff95188ff50811 [11215.102992] R10: ffffffffacb6c373 R11: 0000000000000000 R12: ffff94fcd3dbb59c [11215.102995] R13: ffffb75f8d7aff58 R14: 0000000000000000 R15: 0000000000000000 [11215.102998] FS: 00007f7b26a48800(0000) GS:ffff95170f100000(0000) knlGS:0000000000000000 [11215.103003] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [11215.103007] CR2: 00007f7b26ce3060 CR3: 00000006e49d8002 CR4: 00000000003706f0 [11215.103010] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [11215.103013] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [11215.103017] Call Trace: [11215.103020] <TASK> [11215.103023] ? __die_body.cold+0x19/0x27 [11215.103035] ? die+0x2e/0x50 [11215.103041] ? do_trap+0xca/0x110 [11215.103051] ? do_error_trap+0x6a/0x90 [11215.103058] ? generic_shutdown_super.cold+0x1a/0x1c [11215.103066] ? exc_invalid_op+0x50/0x70 [11215.103073] ? generic_shutdown_super.cold+0x1a/0x1c [11215.103080] ? asm_exc_invalid_op+0x1a/0x20 [11215.103089] ? generic_shutdown_super.cold+0x1a/0x1c [11215.103096] kill_anon_super+0x16/0x40 [11215.103105] cifs_kill_sb+0x46/0x50 [cifs] [11215.103289] deactivate_locked_super+0x33/0xb0 [11215.103294] cleanup_mnt+0xba/0x150 [11215.103301] task_work_run+0x5c/0x90 [11215.103310] syscall_exit_to_user_mode+0x21a/0x220 [11215.103318] do_syscall_64+0x8e/0x160 [11215.103325] ? avc_has_perm_noaudit+0x6b/0xf0 [11215.103332] ? selinux_inode_permission+0x131/0x1c0 [11215.103340] ? mntput_no_expire+0x4a/0x260 [11215.103347] ? do_faccessat+0x1e4/0x2e0 [11215.103354] ? syscall_exit_to_user_mode+0x72/0x220 [11215.103360] ? do_syscall_64+0x8e/0x160 [11215.103366] ? do_syscall_64+0x8e/0x160 [11215.103371] ? vfs_fstatat+0x94/0xb0 [11215.103379] ? __do_sys_newfstatat+0x3c/0x80 [11215.103387] ? syscall_exit_to_user_mode+0x72/0x220 [11215.103393] ? do_syscall_64+0x8e/0x160 [11215.103398] ? syscall_exit_to_user_mode+0x72/0x220 [11215.103405] ? do_syscall_64+0x8e/0x160 [11215.103410] ? syscall_exit_to_user_mode+0x72/0x220 [11215.103416] ? do_syscall_64+0x8e/0x160 [11215.103421] ? exc_page_fault+0x7e/0x180 [11215.103427] entry_SYSCALL_64_after_hwframe+0x76/0x7e [11215.103434] RIP: 0033:0x7f7b26c701eb [11215.103448] Code: c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 f9 ab 0c 00 f7 d8 [11215.103452] RSP: 002b:00007fffee5fa338 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [11215.103457] RAX: 0000000000000000 RBX: 000055f6903e2550 RCX: 00007f7b26c701eb [11215.103461] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055f6903e7ac0 [11215.103464] RBP: 00007fffee5fa410 R08: 000055f6903e1010 R09: 0000000000000007 [11215.103467] R10: 0000000000000000 R11: 0000000000000246 R12: 000055f6903e2658 [11215.103470] R13: 0000000000000000 R14: 000055f6903e7ac0 R15: 000055f6903e7a90 [11215.103476] </TASK> [11215.103478] Modules linked in: nls_utf8 cifs cifs_arc4 nls_ucs2_utils cifs_md4 dns_resolver netfs snd_seq_dummy snd_hrtimer vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) rfkill nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nvidia_drm(POE) nft_ct nvidia_modeset(POE) nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nvidia_uvm(POE) ip_set nf_tables qrtr nvidia(POE) tun sunrpc intel_rapl_msr intel_rapl_common binfmt_misc intel_uncore_frequency intel_uncore_frequency_common sb_edac x86_pkg_temp_thermal intel_powerclamp uvcvideo coretemp snd_hda_codec_realtek uvc snd_hda_codec_generic snd_hda_codec_hdmi videobuf2_vmalloc snd_usb_audio videobuf2_memops kvm_intel snd_hda_scodec_component snd_hda_intel videobuf2_v4l2 vfat pktcdvd typec_displayport fat snd_usbmidi_lib snd_intel_dspcfg kvm videobuf2_common snd_intel_sdw_acpi snd_ump videodev snd_hda_codec rapl snd_rawmidi intel_cstate mc joydev snd_hda_core snd_hwdep snd_seq snd_seq_device mei_wdt iTCO_wdt [11215.103573] intel_pmc_bxt snd_pcm iTCO_vendor_support dell_smm_hwmon dell_smbios dcdbas mei_me snd_timer intel_uncore e1000e dell_wmi_descriptor wmi_bmof intel_wmi_thunderbolt r8169 snd mei i2c_i801 realtek soundcore i2c_smbus lpc_ich i2c_nvidia_gpu loop nfnetlink zram amdgpu video amdxcp i2c_algo_bit drm_ttm_helper ttm drm_exec gpu_sched drm_suballoc_helper drm_buddy drm_display_helper ucsi_ccg crct10dif_pclmul crc32_pclmul crc32c_intel typec_ucsi polyval_clmulni polyval_generic mxm_wmi ghash_clmulni_intel sha512_ssse3 sha256_ssse3 sha1_ssse3 cec typec ata_generic pata_acpi wmi ip6_tables ip_tables fuse [11215.103655] ---[ end trace 0000000000000000 ]--- [11215.103659] RIP: 0010:generic_shutdown_super.cold+0x1a/0x1c [11215.103668] Code: c7 c7 e8 c2 b6 ac 48 8b 30 e8 d3 9b fe ff 0f 0b 48 8b 43 28 48 8d b3 c0 03 00 00 48 c7 c7 48 c3 b6 ac 48 8b 10 e8 b7 9b fe ff <0f> 0b 0f b6 d1 be 01 00 00 00 48 c7 c7 a0 da 63 ad 88 4c 24 07 e8 [11215.103672] RSP: 0018:ffffb75f8d7afb30 EFLAGS: 00010246 [11215.103677] RAX: 000000000000002d RBX: ffff94fbaf8f1000 RCX: 0000000000000027 [11215.103680] RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff95170f1218c0 [11215.103683] RBP: ffffffffc64dfee0 R08: 0000000000000000 R09: ffff95188ff50811 [11215.103687] R10: ffffffffacb6c373 R11: 0000000000000000 R12: ffff94fcd3dbb59c [11215.103690] R13: ffffb75f8d7aff58 R14: 0000000000000000 R15: 0000000000000000 [11215.103693] FS: 00007f7b26a48800(0000) GS:ffff95170f100000(0000) knlGS:0000000000000000 [11215.103697] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [11215.103701] CR2: 00007f7b26ce3060 CR3: 00000006e49d8002 CR4: 00000000003706f0 [11215.103704] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [11215.103707] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400