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 1937946
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: focal
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https://bugs.launchpad.net/bugs/1937946
Title:
Kernel hangs
Status in linux package in Ubuntu:
Incomplete
Bug description:
tim@timpc:~/Dokumente/nbased-gui$ lsb_release -rd
Description: Ubuntu 20.04.2 LTS
Release: 20.04
This is probably the relevant part from /var/log/kern.log
Jul 25 16:34:24 timpc kernel: [16627.134024] BUG: kernel NULL pointer
dereference, address: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134028] #PF: supervisor write access in
kernel mode
Jul 25 16:34:24 timpc kernel: [16627.134030] #PF: error_code(0x0002) -
not-present page
Jul 25 16:34:24 timpc kernel: [16627.134031] PGD 0 P4D 0
Jul 25 16:34:24 timpc kernel: [16627.134035] Oops: 0002 [#1] SMP NOPTI
Jul 25 16:34:24 timpc kernel: [16627.134038] CPU: 4 PID: 3506 Comm: Timer
Tainted: G OE 5.4.0-80-generic #90-Ubuntu
Jul 25 16:34:24 timpc kernel: [16627.134040] Hardware name: Gigabyte
Technology Co., Ltd. B450 AORUS PRO/B450 AORUS PRO-CF, BIOS F2 08/08/2018
Jul 25 16:34:24 timpc kernel: [16627.134046] RIP: 0010:rb_erase+0x241/0x370
Jul 25 16:34:24 timpc kernel: [16627.134049] Code: 3b 79 10 0f 84 94 00 00 00
4c 89 41 08 4d 85 c0 75 4c a8 01 0f 85 72 fe ff ff c3 48 89 cf 48 89 51 10 48
83 cf 01 48 89 48 08 <48> 89 3a 48 8b 39 48 89 38 48 89 01 48 83 e7 fc 74 6a 48
3b 4f 10
Jul 25 16:34:24 timpc kernel: [16627.134051] RSP: 0018:ffff9b6008727c60
EFLAGS: 00010086
Jul 25 16:34:24 timpc kernel: [16627.134053] RAX: ffff8fc2bee1e4a0 RBX:
ffff9b6008727d30 RCX: ffff9b6008277db0
Jul 25 16:34:24 timpc kernel: [16627.134054] RDX: 0000000000000000 RSI:
ffff8fc2bee1dfe0 RDI: ffff9b6008277db1
Jul 25 16:34:24 timpc kernel: [16627.134056] RBP: ffff9b6008727c78 R08:
0000000000000000 R09: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134057] R10: ffff8fc2bed29ac0 R11:
ffff8fc2bed29aa0 R12: ffff8fc2bee1dfe0
Jul 25 16:34:24 timpc kernel: [16627.134058] R13: 0000000000000000 R14:
ffff8fc2bee1df80 R15: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134060] FS: 00007f082ae56700(0000)
GS:ffff8fc2bed00000(0000) knlGS:0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134061] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Jul 25 16:34:24 timpc kernel: [16627.134063] CR2: 0000000000000000 CR3:
0000000738206000 CR4: 00000000003406e0
Jul 25 16:34:24 timpc kernel: [16627.134064] Call Trace:
Jul 25 16:34:24 timpc kernel: [16627.134067] ? timerqueue_del+0x24/0x50
Jul 25 16:34:24 timpc kernel: [16627.134073] __remove_hrtimer+0x3c/0x90
Jul 25 16:34:24 timpc kernel: [16627.134076] hrtimer_try_to_cancel+0xb7/0x110
Jul 25 16:34:24 timpc kernel: [16627.134078] hrtimer_cancel+0x15/0x20
Jul 25 16:34:24 timpc kernel: [16627.134082] futex_wait+0x21b/0x290
Jul 25 16:34:24 timpc kernel: [16627.134085] ? hrtimer_init_sleeper+0x90/0x90
Jul 25 16:34:24 timpc kernel: [16627.134088] do_futex+0x157/0x4d0
Jul 25 16:34:24 timpc kernel: [16627.134092] ? _copy_from_user+0x3e/0x60
Jul 25 16:34:24 timpc kernel: [16627.134095] __x64_sys_futex+0x13f/0x170
Jul 25 16:34:24 timpc kernel: [16627.134099] do_syscall_64+0x57/0x190
Jul 25 16:34:24 timpc kernel: [16627.134102]
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Jul 25 16:34:24 timpc kernel: [16627.134105] RIP: 0033:0x7f083c67d7b1
Jul 25 16:34:24 timpc kernel: [16627.134107] Code: 01 00 00 e8 51 38 00 00 4c
8b 54 24 18 8b 74 24 40 31 d2 89 44 24 44 41 b9 ff ff ff ff 45 31 c0 4c 89 f7
b8 ca 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 73 01 00 00 8b 7c 24 44 e8 7a 38
00 00 31
Jul 25 16:34:24 timpc kernel: [16627.134109] RSP: 002b:00007f082ae55980
EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
Jul 25 16:34:24 timpc kernel: [16627.134111] RAX: ffffffffffffffda RBX:
00007f0830636e48 RCX: 00007f083c67d7b1
Jul 25 16:34:24 timpc kernel: [16627.134112] RDX: 0000000000000000 RSI:
0000000000000089 RDI: 00007f0830636e60
Jul 25 16:34:24 timpc kernel: [16627.134113] RBP: 00007f0830636e38 R08:
0000000000000000 R09: 00000000ffffffff
Jul 25 16:34:24 timpc kernel: [16627.134114] R10: 00007f082ae55a68 R11:
0000000000000246 R12: 00007f0830636e5c
Jul 25 16:34:24 timpc kernel: [16627.134115] R13: 00007f0830636e08 R14:
00007f0830636e60 R15: 00007f082ae559d0
Jul 25 16:34:24 timpc kernel: [16627.134117] Modules linked in:
vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ccm edac_mce_amd kvm_amd xt_CHECKSUM
xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_mangle
ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6
nf_defrag_ipv4 nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter
bpfilter bridge stp llc binfmt_misc nls_iso8859_1 rtl8xxxu
snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi
rtl8192cu snd_hda_intel rtl_usb snd_intel_dspcfg rtl8192c_common snd_hda_codec
rtlwifi snd_hda_core mac80211 snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event
cfg80211 joydev snd_rawmidi input_leds radeon kvm crct10dif_pclmul
ghash_clmulni_intel aesni_intel snd_seq libarc4 ttm crypto_simd snd_seq_device
cryptd glue_helper snd_timer drm_kms_helper fb_sys_fops syscopyarea sysfillrect
k10temp snd sysimgblt wmi_bmof soundcore ccp mac_hid sch_fq_codel parport_pc
ppdev lp drm parport ip_tables x_tables autofs4 btrfs
Jul 25 16:34:24 timpc kernel: [16627.134158] zstd_compress raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crc32_pclmul igb
nvme i2c_piix4 nvme_core ahci i2c_algo_bit dca libahci wmi gpio_amdpt
gpio_generic
Jul 25 16:34:24 timpc kernel: [16627.134174] CR2: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134177] ---[ end trace fee3044dbf2069d3
]---
Jul 25 16:34:24 timpc kernel: [16627.134180] RIP: 0010:rb_erase+0x241/0x370
Jul 25 16:34:24 timpc kernel: [16627.134182] Code: 3b 79 10 0f 84 94 00 00 00
4c 89 41 08 4d 85 c0 75 4c a8 01 0f 85 72 fe ff ff c3 48 89 cf 48 89 51 10 48
83 cf 01 48 89 48 08 <48> 89 3a 48 8b 39 48 89 38 48 89 01 48 83 e7 fc 74 6a 48
3b 4f 10
Jul 25 16:34:24 timpc kernel: [16627.134183] RSP: 0018:ffff9b6008727c60
EFLAGS: 00010086
Jul 25 16:34:24 timpc kernel: [16627.134185] RAX: ffff8fc2bee1e4a0 RBX:
ffff9b6008727d30 RCX: ffff9b6008277db0
Jul 25 16:34:24 timpc kernel: [16627.134186] RDX: 0000000000000000 RSI:
ffff8fc2bee1dfe0 RDI: ffff9b6008277db1
Jul 25 16:34:24 timpc kernel: [16627.134187] RBP: ffff9b6008727c78 R08:
0000000000000000 R09: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134188] R10: ffff8fc2bed29ac0 R11:
ffff8fc2bed29aa0 R12: ffff8fc2bee1dfe0
Jul 25 16:34:24 timpc kernel: [16627.134189] R13: 0000000000000000 R14:
ffff8fc2bee1df80 R15: 0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134191] FS: 00007f082ae56700(0000)
GS:ffff8fc2bed00000(0000) knlGS:0000000000000000
Jul 25 16:34:24 timpc kernel: [16627.134192] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Jul 25 16:34:24 timpc kernel: [16627.134193] CR2: 0000000000000000 CR3:
0000000738206000 CR4: 00000000003406e0
Jul 25 16:34:39 timpc kernel: [16642.457499] usb 3-3.2: USB disconnect,
device number 5
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