I keep up-to-date with Greg's stable releases.

I've seen three of these BUGs this year, none earlier than 5.6.7.

They occur randomly and infrequently, so impossible to bisect.

Afterwards, processes end up hung in "D" state, and can't be killed.

The tainting is due to loading this module: May 08 17:43:55 bilbo kernel: xt_TARPIT: loading out-of-tree module taints kernel. from http://xtables-addons.sourceforge.net/ This module has been loaded for a very long time, I'd hope that this isn't the cause.

config.gz attached

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Apr 23 17:51:18 kernel: Linux version 5.6.7 (gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)) #5 SMP PREEMPT Thu Apr 23 13:18:14 BST 2020 Apr 26 16:51:14 kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084 Apr 26 16:52:49 kernel: Linux version 5.6.7 (gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)) #5 SMP PREEMPT Thu Apr 23 13:18:14 BST 2020 Apr 29 21:42:23 kernel: Linux version 5.6.8 (gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)) #6 SMP PREEMPT Wed Apr 29 20:19:53 BST 2020 May 2 09:57:55 kernel: Linux version 5.6.9 (gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)) #7 SMP PREEMPT Sat May 2 09:31:11 BST 2020 May 7 02:44:38 kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084 May 8 10:32:18 kernel: Linux version 5.6.9 (gcc version 9.3.0 (Gentoo Hardened 9.3.0 p2)) #7 SMP PREEMPT Sat May 2 09:31:11 BST 2020 May 8 13:21:41 kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084

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Apr 26 16:51:14 bilbo kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084 Apr 26 16:51:14 bilbo kernel: #PF: supervisor write access in kernel mode Apr 26 16:51:14 bilbo kernel: #PF: error_code(0x0002) - not-present page Apr 26 16:51:14 bilbo kernel: PGD 0 P4D 0 Apr 26 16:51:14 bilbo kernel: Oops: 0002 [#1] PREEMPT SMP Apr 26 16:51:14 bilbo kernel: CPU: 3 PID: 83 Comm: kswapd0 Tainted: G O 5.6.7 #5 Apr 26 16:51:14 bilbo kernel: Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016 Apr 26 16:51:14 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 Apr 26 16:51:14 bilbo kernel: Code: 81 e8 84 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 20 37 56 81 72 0c 31 c0 48 81 ff 3f 3b 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 Apr 26 16:51:14 bilbo kernel: RSP: 0018:ffffc9000018fb00 EFLAGS: 00010246 Apr 26 16:51:14 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 0000000000000000 Apr 26 16:51:14 bilbo kernel: RDX: 0000000000000001 RSI: ffffc9000018fb14 RDI: 0000000000000084 Apr 26 16:51:14 bilbo kernel: RBP: 0000000000000084 R08: 0000000000000201 R09: ffff88800a6f4f20 Apr 26 16:51:14 bilbo kernel: R10: 0000000000000000 R11: ffff8882258025b8 R12: 0000000000000001 Apr 26 16:51:14 bilbo kernel: R13: ffff88800a6f4c08 R14: ffff888225f97100 R15: ffff88800a6f4a08 Apr 26 16:51:14 bilbo kernel: FS: 0000000000000000(0000) GS:ffff888226d80000(0000) knlGS:0000000000000000 Apr 26 16:51:14 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 26 16:51:14 bilbo kernel: CR2: 0000000000000084 CR3: 00000002128e7000 CR4: 00000000000406e0 Apr 26 16:51:14 bilbo kernel: Call Trace: Apr 26 16:51:14 bilbo kernel: do_raw_spin_lock+0x2f/0x5a Apr 26 16:51:14 bilbo kernel: remove_inode_buffers+0x3d/0x80 Apr 26 16:51:14 bilbo kernel: inode_lru_isolate+0xce/0x178 Apr 26 16:51:14 bilbo kernel: ? iput+0x1a4/0x1a4 Apr 26 16:51:14 bilbo kernel: __list_lru_walk_one+0x68/0xf1 Apr 26 16:51:14 bilbo kernel: ? iput+0x1a4/0x1a4 Apr 26 16:51:14 bilbo kernel: list_lru_walk_one+0x4f/0x67 Apr 26 16:51:14 bilbo kernel: prune_icache_sb+0x4d/0x79 Apr 26 16:51:14 bilbo kernel: super_cache_scan+0x11f/0x172 Apr 26 16:51:14 bilbo kernel: do_shrink_slab+0x1d5/0x2af Apr 26 16:51:14 bilbo kernel: shrink_slab+0x13f/0x27e Apr 26 16:51:14 bilbo kernel: shrink_node+0x284/0x4e7 Apr 26 16:51:14 bilbo kernel: balance_pgdat+0x25f/0x3f2 Apr 26 16:51:14 bilbo kernel: kswapd+0x301/0x34d Apr 26 16:51:14 bilbo kernel: ? remove_wait_queue+0x46/0x46 Apr 26 16:51:14 bilbo kernel: ? balance_pgdat+0x3f2/0x3f2 Apr 26 16:51:14 bilbo kernel: kthread+0xe9/0xee Apr 26 16:51:14 bilbo kernel: ? kthread_flush_worker+0x75/0x75 Apr 26 16:51:14 bilbo kernel: ret_from_fork+0x22/0x40 Apr 26 16:51:14 bilbo kernel: Modules linked in: udp_diag nfnetlink xt_hl xt_nat xt_TARPIT(O) xt_CT xt_helper nf_nat_ftp nf_conntrack_ftp nf_log_ipv6 nf_log_ipv4 nf_log_common ip6t_rt ip6table_nat xt_MASQUERADE iptable_nat nf_nat xt_TCPMSS xt_LOG ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 ip6table_raw iptable_raw ip6table_mangle iptable_mangle xt_multiport xt_state xt_limit xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables tun binfmt_misc xt_tcpudp iptable_filter ip_tables x_tables ctr ccm pppoe pppox ppp_generic slhc ath9k ath9k_common nouveau ath9k_hw af_packet wmi video ath i2c_algo_bit snd_hda_codec_realtek drm_kms_helper snd_hda_codec_generic cfbfillrect snd_hda_codec_hdmi syscopyarea cfbimgblt sysfillrect snd_hda_intel sysimgblt fb_sys_fops cfbcopyarea fb snd_intel_dspcfg mac80211 snd_hda_codec font fbdev ttm drm cfg80211 snd_hda_core snd_pcm drm_panel_orientation_quirks backlight pl2303 snd_timer agpgart usbserial snd usblp libarc4 soundcore evdev Apr 26 16:51:14 bilbo kernel: fam15h_power k10temp acpi_cpufreq sch_fq_codel nfsd cpuid i2c_piix4 i2c_dev auth_rpcgss i2c_core lockd it87 grace hwmon_vid ohci_pci aesni_intel glue_helper crypto_simd cryptd ehci_pci ohci_hcd ehci_hcd usbcore usb_common sunrpc autofs4 Apr 26 16:51:14 bilbo kernel: CR2: 0000000000000084 Apr 26 16:51:14 bilbo kernel: ---[ end trace d5f45dea7b64ab94 ]--- Apr 26 16:51:14 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 Apr 26 16:51:14 bilbo kernel: Code: 81 e8 84 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 20 37 56 81 72 0c 31 c0 48 81 ff 3f 3b 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 Apr 26 16:51:14 bilbo kernel: RSP: 0018:ffffc9000018fb00 EFLAGS: 00010246 Apr 26 16:51:14 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 0000000000000000 Apr 26 16:51:14 bilbo kernel: RDX: 0000000000000001 RSI: ffffc9000018fb14 RDI: 0000000000000084 Apr 26 16:51:14 bilbo kernel: RBP: 0000000000000084 R08: 0000000000000201 R09: ffff88800a6f4f20 Apr 26 16:51:14 bilbo kernel: R10: 0000000000000000 R11: ffff8882258025b8 R12: 0000000000000001 Apr 26 16:51:14 bilbo kernel: R13: ffff88800a6f4c08 R14: ffff888225f97100 R15: ffff88800a6f4a08 Apr 26 16:51:14 bilbo kernel: FS: 0000000000000000(0000) GS:ffff888226d80000(0000) knlGS:0000000000000000 Apr 26 16:51:14 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Apr 26 16:51:14 bilbo kernel: CR2: 0000000000000084 CR3: 00000002128e7000 CR4: 00000000000406e0 Apr 26 16:51:14 bilbo kernel: note: kswapd0[83] exited with preempt_count 1

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May 7 02:44:38 bilbo kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084 May 7 02:44:38 bilbo kernel: #PF: supervisor write access in kernel mode May 7 02:44:38 bilbo kernel: #PF: error_code(0x0002) - not-present page May 7 02:44:38 bilbo kernel: PGD 0 P4D 0 May 7 02:44:38 bilbo kernel: Oops: 0002 [#1] PREEMPT SMP May 7 02:44:38 bilbo kernel: CPU: 1 PID: 83 Comm: kswapd0 Tainted: G O 5.6.9 #7 May 7 02:44:38 bilbo kernel: Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016 May 7 02:44:38 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 May 7 02:44:38 bilbo kernel: Code: 81 e8 78 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 60 39 56 81 72 0c 31 c0 48 81 ff 7f 3d 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 May 7 02:44:38 bilbo kernel: RSP: 0018:ffffc9000018fb00 EFLAGS: 00010246 May 7 02:44:38 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 0000000000000000 May 7 02:44:38 bilbo kernel: RDX: 0000000000000001 RSI: ffffc9000018fb14 RDI: 0000000000000084 May 7 02:44:38 bilbo kernel: RBP: 0000000000000084 R08: 0000000000000201 R09: ffff88800a6f4f20 May 7 02:44:38 bilbo kernel: R10: 0000000000000000 R11: ffff888225802570 R12: 0000000000000001 May 7 02:44:38 bilbo kernel: R13: ffff88800a6f4c08 R14: ffff88821d3dd5c0 R15: ffff88800a6f4a08 May 7 02:44:38 bilbo kernel: FS: 0000000000000000(0000) GS:ffff888226c80000(0000) knlGS:0000000000000000 May 7 02:44:38 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 7 02:44:38 bilbo kernel: CR2: 0000000000000084 CR3: 0000000176ec1000 CR4: 00000000000406e0 May 7 02:44:38 bilbo kernel: Call Trace: May 7 02:44:38 bilbo kernel: do_raw_spin_lock+0x2f/0x5a May 7 02:44:38 bilbo kernel: remove_inode_buffers+0x3d/0x80 May 7 02:44:38 bilbo kernel: inode_lru_isolate+0xce/0x178 May 7 02:44:38 bilbo kernel: ? iput+0x1a4/0x1a4 May 7 02:44:38 bilbo kernel: __list_lru_walk_one+0x68/0xf1 May 7 02:44:38 bilbo kernel: ? iput+0x1a4/0x1a4 May 7 02:44:38 bilbo kernel: list_lru_walk_one+0x4f/0x67 May 7 02:44:38 bilbo kernel: prune_icache_sb+0x4d/0x79 May 7 02:44:38 bilbo kernel: super_cache_scan+0x11f/0x172 May 7 02:44:38 bilbo kernel: do_shrink_slab+0x1d5/0x2af May 7 02:44:38 bilbo kernel: shrink_slab+0x13f/0x27e May 7 02:44:38 bilbo kernel: shrink_node+0x284/0x4e7 May 7 02:44:38 bilbo kernel: balance_pgdat+0x25f/0x3f2 May 7 02:44:38 bilbo kernel: kswapd+0x301/0x34d May 7 02:44:38 bilbo kernel: ? remove_wait_queue+0x46/0x46 May 7 02:44:38 bilbo kernel: ? balance_pgdat+0x3f2/0x3f2 May 7 02:44:38 bilbo kernel: kthread+0xe9/0xee May 7 02:44:38 bilbo kernel: ? kthread_flush_worker+0x75/0x75 May 7 02:44:38 bilbo kernel: ret_from_fork+0x22/0x40 May 7 02:44:38 bilbo kernel: Modules linked in: udp_diag nfnetlink xt_hl xt_nat xt_TARPIT(O) xt_CT xt_tcpudp xt_helper nf_nat_ftp nf_conntrack_ftp nf_log_ipv6 nf_log_ipv4 nf_log_common ip6t_rt ip6table_nat xt_MASQUERADE iptable_nat nf_nat xt_TCPMSS xt_LOG ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 ip6table_raw iptable_raw ip6table_mangle iptable_mangle xt_multiport xt_state xt_limit xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter ip_tables x_tables tun binfmt_misc ctr ccm pppoe pppox ppp_generic slhc nouveau wmi video i2c_algo_bit drm_kms_helper cfbfillrect syscopyarea cfbimgblt sysfillrect sysimgblt fb_sys_fops cfbcopyarea fb af_packet font fbdev ttm ath9k snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi ath9k_common snd_hda_intel drm ath9k_hw snd_intel_dspcfg snd_hda_codec drm_panel_orientation_quirks ath pl2303 backlight snd_hda_core usbserial agpgart usblp mac80211 snd_pcm snd_timer evdev cfg80211 snd libarc4 soundcore May 7 02:44:38 bilbo kernel: fam15h_power k10temp acpi_cpufreq sch_fq_codel nfsd auth_rpcgss lockd grace cpuid i2c_piix4 i2c_dev i2c_core it87 hwmon_vid ohci_pci aesni_intel glue_helper crypto_simd cryptd ohci_hcd ehci_pci ehci_hcd usbcore usb_common sunrpc autofs4 May 7 02:44:38 bilbo kernel: CR2: 0000000000000084 May 7 02:44:38 bilbo kernel: ---[ end trace 9a52ca6f877e76db ]--- May 7 02:44:38 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 May 7 02:44:38 bilbo kernel: Code: 81 e8 78 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 60 39 56 81 72 0c 31 c0 48 81 ff 7f 3d 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 May 7 02:44:38 bilbo kernel: RSP: 0018:ffffc9000018fb00 EFLAGS: 00010246 May 7 02:44:38 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 0000000000000000 May 7 02:44:38 bilbo kernel: RDX: 0000000000000001 RSI: ffffc9000018fb14 RDI: 0000000000000084 May 7 02:44:38 bilbo kernel: RBP: 0000000000000084 R08: 0000000000000201 R09: ffff88800a6f4f20 May 7 02:44:38 bilbo kernel: R10: 0000000000000000 R11: ffff888225802570 R12: 0000000000000001 May 7 02:44:38 bilbo kernel: R13: ffff88800a6f4c08 R14: ffff88821d3dd5c0 R15: ffff88800a6f4a08 May 7 02:44:38 bilbo kernel: FS: 0000000000000000(0000) GS:ffff888226c80000(0000) knlGS:0000000000000000 May 7 02:44:38 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 7 02:44:38 bilbo kernel: CR2: 0000000000000084 CR3: 0000000176ec1000 CR4: 00000000000406e0 May 7 02:44:38 bilbo kernel: note: kswapd0[83] exited with preempt_count 1

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May 8 13:21:41 bilbo kernel: BUG: kernel NULL pointer dereference, address: 0000000000000084 May 8 13:21:41 bilbo kernel: #PF: supervisor write access in kernel mode May 8 13:21:41 bilbo kernel: #PF: error_code(0x0002) - not-present page May 8 13:21:41 bilbo kernel: PGD 0 P4D 0 May 8 13:21:41 bilbo kernel: Oops: 0002 [#1] PREEMPT SMP May 8 13:21:41 bilbo kernel: CPU: 3 PID: 520181 Comm: rm Tainted: G O 5.6.9 #7 May 8 13:21:41 bilbo kernel: Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./970A-DS3P, BIOS FD 02/26/2016 May 8 13:21:41 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 May 8 13:21:41 bilbo kernel: Code: 81 e8 78 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 60 39 56 81 72 0c 31 c0 48 81 ff 7f 3d 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 May 8 13:21:41 bilbo kernel: RSP: 0018:ffffc90002e77dc8 EFLAGS: 00010246 May 8 13:21:41 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 000000000004de96 May 8 13:21:41 bilbo kernel: RDX: 0000000000000001 RSI: ffffc90002e77ddc RDI: 0000000000000084 May 8 13:21:41 bilbo kernel: RBP: 0000000000000084 R08: ffff88800a6e5b60 R09: ffff888214b0fab8 May 8 13:21:41 bilbo kernel: R10: ffff88820ac62680 R11: ffff888224c10400 R12: ffff88800a6f4c08 May 8 13:21:41 bilbo kernel: R13: 0000000000000008 R14: ffff88800a6e7300 R15: ffff888222a84000 May 8 13:21:41 bilbo kernel: FS: 00007efe6281f580(0000) GS:ffff888226d80000(0000) knlGS:0000000000000000 May 8 13:21:41 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 8 13:21:41 bilbo kernel: CR2: 0000000000000084 CR3: 000000020b203000 CR4: 00000000000406e0 May 8 13:21:41 bilbo kernel: Call Trace: May 8 13:21:41 bilbo kernel: do_raw_spin_lock+0x2f/0x5a May 8 13:21:41 bilbo kernel: invalidate_inode_buffers+0x35/0x64 May 8 13:21:41 bilbo kernel: ext4_clear_inode+0xe/0x6e May 8 13:21:41 bilbo kernel: ext4_free_inode+0x132/0x40e May 8 13:21:41 bilbo kernel: ext4_evict_inode+0x31e/0x371 May 8 13:21:41 bilbo kernel: evict+0xbc/0x170 May 8 13:21:41 bilbo kernel: do_unlinkat+0x141/0x1d8 May 8 13:21:41 bilbo kernel: do_syscall_64+0x4d/0x5a May 8 13:21:41 bilbo kernel: entry_SYSCALL_64_after_hwframe+0x44/0xa9 May 8 13:21:41 bilbo kernel: RIP: 0033:0x7efe626fcd67 May 8 13:21:41 bilbo kernel: Code: 73 01 c3 48 8b 0d 29 71 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d f9 70 0c 00 f7 d8 64 89 01 48 May 8 13:21:41 bilbo kernel: RSP: 002b:00007ffd329853a8 EFLAGS: 00000256 ORIG_RAX: 0000000000000107 May 8 13:21:41 bilbo kernel: RAX: ffffffffffffffda RBX: 0000556581e6c510 RCX: 00007efe626fcd67 May 8 13:21:41 bilbo kernel: RDX: 0000000000000000 RSI: 0000556581e6c618 RDI: 0000000000000008 May 8 13:21:41 bilbo kernel: RBP: 0000556581e624f0 R08: 0000000000000003 R09: 0000000000000000 May 8 13:21:41 bilbo kernel: R10: 0000000000000000 R11: 0000000000000256 R12: 0000000000000000 May 8 13:21:41 bilbo kernel: R13: 00007ffd32985580 R14: 00007ffd32985580 R15: 0000000000000002 May 8 13:21:41 bilbo kernel: Modules linked in: nfnetlink xt_hl xt_nat xt_TARPIT(O) xt_CT xt_tcpudp xt_helper nf_nat_ftp nf_conntrack_ftp nf_log_ipv6 nf_log_ipv4 nf_log_common ip6t_rt ip6table_nat xt_MASQUERADE iptable_nat nf_nat xt_TCPMSS xt_LOG ip6t_REJECT nf_reject_ipv6 ipt_REJECT nf_reject_ipv4 ip6table_raw iptable_raw ip6table_mangle iptable_mangle xt_multiport xt_state xt_limit xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter ip_tables x_tables tun binfmt_misc ctr ccm pppoe pppox ppp_generic slhc nouveau pl2303 usblp wmi usbserial video i2c_algo_bit drm_kms_helper cfbfillrect syscopyarea cfbimgblt af_packet sysfillrect sysimgblt fb_sys_fops cfbcopyarea fb font snd_hda_codec_realtek ath9k snd_hda_codec_generic snd_hda_codec_hdmi ath9k_common snd_hda_intel ath9k_hw fbdev snd_intel_dspcfg ttm snd_hda_codec ath drm mac80211 aesni_intel drm_panel_orientation_quirks ohci_pci glue_helper cfg80211 evdev crypto_simd backlight snd_hda_core agpgart libarc4 May 8 13:21:41 bilbo kernel: ohci_hcd cryptd ehci_pci snd_pcm ehci_hcd snd_timer usbcore snd usb_common soundcore k10temp fam15h_power acpi_cpufreq sch_fq_codel cpuid i2c_piix4 i2c_dev nfsd i2c_core auth_rpcgss it87 hwmon_vid lockd grace sunrpc autofs4 May 8 13:21:41 bilbo kernel: CR2: 0000000000000084 May 8 13:21:41 bilbo kernel: ---[ end trace a678191562666ad2 ]--- May 8 13:21:41 bilbo kernel: RIP: 0010:atomic_try_cmpxchg+0x2/0x12 May 8 13:21:41 bilbo kernel: Code: 81 e8 78 36 fc ff 0f 0b 5b c3 c3 48 89 7f 20 c3 31 c0 48 81 ff 60 39 56 81 72 0c 31 c0 48 81 ff 7f 3d 56 81 0f 92 c0 c3 8b 06 <f0> 0f b1 17 41 0f 94 c0 74 02 89 06 44 89 c0 c3 48 83 ec 18 ba 01 May 8 13:21:41 bilbo kernel: RSP: 0018:ffffc90002e77dc8 EFLAGS: 00010246 May 8 13:21:41 bilbo kernel: RAX: 0000000000000000 RBX: ffff88800a6f4a08 RCX: 000000000004de96 May 8 13:21:41 bilbo kernel: RDX: 0000000000000001 RSI: ffffc90002e77ddc RDI: 0000000000000084 May 8 13:21:41 bilbo kernel: RBP: 0000000000000084 R08: ffff88800a6e5b60 R09: ffff888214b0fab8 May 8 13:21:41 bilbo kernel: R10: ffff88820ac62680 R11: ffff888224c10400 R12: ffff88800a6f4c08 May 8 13:21:41 bilbo kernel: R13: 0000000000000008 R14: ffff88800a6e7300 R15: ffff888222a84000 May 8 13:21:41 bilbo kernel: FS: 00007efe6281f580(0000) GS:ffff888226d80000(0000) knlGS:0000000000000000 May 8 13:21:41 bilbo kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 8 13:21:41 bilbo kernel: CR2: 0000000000000084 CR3: 000000020b203000 CR4: 00000000000406e0 May 8 13:21:41 bilbo kernel: note: rm[520181] exited with preempt_count 1

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