Re: [PATCH] selftests/ftrace: Correctly enable event in instance-event.tc

From: Zheng Yejian
Date: Tue Sep 05 2023 - 12:34:31 EST

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On 2023/7/11 06:37, Steven Rostedt wrote:

Shuah, can you take this?

Kindly ping and bug report :)

Hi, Steve, Ajay,

After this patch and run this testcase, I got an use-after-free report
by KASAN. Short log see [1], full logs see attach "panic.log".

And by simple bisect, I found it may be introduced by:

27152bceea1d ("eventfs: Move tracing/events to eventfs")

Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27152bceea1df27ffebb12ac9cd9adbf2c4c3f35

[1]
# ./ftracetest test.d/instances/instance-event.tc
=== Ftrace unit tests ===
[1] Test creation and deletion of trace instances while setting an event[ 89.472397] ==================================================================
[ 89.475053] BUG: KASAN: slab-use-after-free in __ftrace_event_enable_disable+0x1b/0x3a0
[ 89.480039] Read of size 8 at addr ffff88814f5b2690 by task ftracetest/392
[ 89.483906]
[ 89.484560] CPU: 10 PID: 392 Comm: ftracetest Tainted: G W 6.5.0+ #127
[ 89.487033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 89.489751] Call Trace:
[ 89.490315] <TASK>
[ 89.490817] dump_stack_lvl+0x4b/0x80
[ 89.491570] print_report+0xd0/0x620
[ 89.492296] ? __virt_addr_valid+0xf9/0x180
[ 89.493134] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 89.494151] kasan_report+0xb6/0xf0
[ 89.494881] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 89.495878] __ftrace_event_enable_disable+0x1b/0x3a0
[ 89.496805] event_enable_write+0x109/0x170
[ 89.497631] ? __pfx_event_enable_write+0x10/0x10
[ 89.498618] ? __pfx_bpf_lsm_file_permission+0x10/0x10
[ 89.499659] ? security_file_permission+0x51/0x2d0
[ 89.500604] vfs_write+0x175/0x670
[ 89.501385] ? __pfx_vfs_write+0x10/0x10
[ 89.502246] ? __pfx__raw_spin_lock+0x10/0x10
[ 89.503187] ? expand_files+0x9b/0x330
[ 89.504011] ? __pfx_expand_files+0x10/0x10
[ 89.504898] ? set_close_on_exec+0x7b/0xe0
[ 89.505782] ? __fget_light+0xae/0x1e0
[ 89.506615] ? _raw_spin_lock+0x85/0xe0
[ 89.507989] ksys_write+0xbd/0x160
[ 89.509302] ? __pfx_ksys_write+0x10/0x10
[ 89.510493] ? dnotify_flush+0x38/0x220
[ 89.511654] ? fpregs_assert_state_consistent+0x5a/0x70
[ 89.513297] ? exit_to_user_mode_prepare+0x32/0x110
[ 89.514692] do_syscall_64+0x3f/0x90
[ 89.515516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

On Mon, 26 Jun 2023 19:12:55 +0900
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote:

On Mon, 26 Jun 2023 19:11:14 +0900
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote:

On Mon, 26 Jun 2023 08:11:44 +0800
Zheng Yejian <zhengyejian1@xxxxxxxxxx> wrote:

Function instance_set() expects to enable event 'sched_switch', so we
should set 1 to its 'enable' file.

Testcase passed after this patch:
# ./ftracetest test.d/instances/instance-event.tc
=== Ftrace unit tests ===
[1] Test creation and deletion of trace instances while setting an event
[PASS]

# of passed: 1
# of failed: 0
# of unresolved: 0
# of untested: 0
# of unsupported: 0
# of xfailed: 0
# of undefined(test bug): 0

Good catch!

Fixes: 91e6f1ce8657 ("ftracetest: Add instance created, delete, read and enable event test")

It seems this tests internally broken but the result is same because this disabled
error checking ('set +e').

And

Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

Acked-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>

Thanks for your ack :)

-- Zheng Yejian

-- Steve

Thanks!

Signed-off-by: Zheng Yejian <zhengyejian1@xxxxxxxxxx>
---
.../testing/selftests/ftrace/test.d/instances/instance-event.tc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc b/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
index 0eb47fbb3f44..42422e425107 100644
--- a/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
+++ b/tools/testing/selftests/ftrace/test.d/instances/instance-event.tc
@@ -39,7 +39,7 @@ instance_read() {
instance_set() {
while :; do
- echo 1 > foo/events/sched/sched_switch
+ echo 1 > foo/events/sched/sched_switch/enable
done 2> /dev/null
}
--
2.25.1

--
Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>

# ./ftracetest test.d/instances/instance-event.tc

=== Ftrace unit tests ===

[1] Test creation and deletion of trace instances while setting an event[ 89.472397] ==================================================================

[ 89.475053] BUG: KASAN: slab-use-after-free in __ftrace_event_enable_disable+0x1b/0x3a0

[ 89.480039] Read of size 8 at addr ffff88814f5b2690 by task ftracetest/392

[ 89.483906]

[ 89.484560] CPU: 10 PID: 392 Comm: ftracetest Tainted: G W 6.5.0+ #127

[ 89.487033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.489751] Call Trace:

[ 89.490315] <TASK>

[ 89.490817] dump_stack_lvl+0x4b/0x80

[ 89.491570] print_report+0xd0/0x620

[ 89.492296] ? __virt_addr_valid+0xf9/0x180

[ 89.493134] ? __ftrace_event_enable_disable+0x1b/0x3a0

[ 89.494151] kasan_report+0xb6/0xf0

[ 89.494881] ? __ftrace_event_enable_disable+0x1b/0x3a0

[ 89.495878] __ftrace_event_enable_disable+0x1b/0x3a0

[ 89.496805] event_enable_write+0x109/0x170

[ 89.497631] ? __pfx_event_enable_write+0x10/0x10

[ 89.498618] ? __pfx_bpf_lsm_file_permission+0x10/0x10

[ 89.499659] ? security_file_permission+0x51/0x2d0

[ 89.500604] vfs_write+0x175/0x670

[ 89.501385] ? __pfx_vfs_write+0x10/0x10

[ 89.502246] ? __pfx__raw_spin_lock+0x10/0x10

[ 89.503187] ? expand_files+0x9b/0x330

[ 89.504011] ? __pfx_expand_files+0x10/0x10

[ 89.504898] ? set_close_on_exec+0x7b/0xe0

[ 89.505782] ? __fget_light+0xae/0x1e0

[ 89.506615] ? _raw_spin_lock+0x85/0xe0

[ 89.507989] ksys_write+0xbd/0x160

[ 89.509302] ? __pfx_ksys_write+0x10/0x10

[ 89.510493] ? dnotify_flush+0x38/0x220

[ 89.511654] ? fpregs_assert_state_consistent+0x5a/0x70

[ 89.513297] ? exit_to_user_mode_prepare+0x32/0x110

[ 89.514692] do_syscall_64+0x3f/0x90

[ 89.515516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

[ 89.516574] RIP: 0033:0x7f2345c18077

[ 89.517399] Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24

[ 89.520853] RSP: 002b:00007ffc322ec108 EFLAGS: 00000246 ORIG_RAX: 0000000000000001

[ 89.522367] RAX: ffffffffffffffda RBX: 0000563f82f3f560 RCX: 00007f2345c18077

[ 89.523717] RDX: 0000000000000002 RSI: 0000563f82f3f560 RDI: 0000000000000001

[ 89.525086] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000563f82f8d9d9

[ 89.526437] R10: 0000563f81225682 R11: 0000000000000246 R12: 0000000000000001

[ 89.527805] R13: 0000000000000002 R14: 7fffffffffffffff R15: 00007ffc322ec2d0

[ 89.529133] </TASK>

[ 89.529650]

[ 89.530135] Allocated by task 393:

[ 89.530992]

[ 89.531458] Freed by task 437:

[ 89.532558]

[ 89.533028] The buggy address belongs to the object at ffff88814f5b2680

[ 89.533028] which belongs to the cache trace_event_file of size 96

[ 89.536893] The buggy address is located 16 bytes inside of

[ 89.536893] freed 96-byte region [ffff88814f5b2680, ffff88814f5b26e0)

[ 89.540093]

[ 89.540565] The buggy address belongs to the physical page:

[ 89.541682]

[ 89.542186] Memory state around the buggy address:

[ 89.543171] ffff88814f5b2580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

[ 89.544561] ffff88814f5b2600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

[ 89.545991] >ffff88814f5b2680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

[ 89.547357] ^

[ 89.548180] ffff88814f5b2700: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

[ 89.549603] ffff88814f5b2780: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc

[ 89.551022] ==================================================================

[ 89.558057] BUG: kernel NULL pointer dereference, address: 0000000000000008

[ 89.559509] #PF: supervisor read access in kernel mode

[ 89.560537] #PF: error_code(0x0000) - not-present page

[ 89.561585] PGD 0 P4D 0

[ 89.562239] Oops: 0000 [#1] PREEMPT SMP KASAN PTI

[ 89.563218] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B W 6.5.0+ #127

[ 89.564694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.566739] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.567804] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.571057] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.572112] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.573464] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.576277] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.577668] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.579093] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.580476] FS: 0000000000000000(0000) GS:ffff8880bb280000(0000) knlGS:0000000000000000

[ 89.582066] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.583190] CR2: 0000000000000008 CR3: 00000000102ee000 CR4: 00000000000006e0

[ 89.584521] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.585820] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.587152] Call Trace:

[ 89.587757] <TASK>

[ 89.588321] ? __die_body+0x1f/0x70

[ 89.589105] ? page_fault_oops+0x1f5/0x580

[ 89.589976] ? __pfx_page_fault_oops+0x10/0x10

[ 89.590892] ? is_prefetch.isra.0+0x7a/0x260

[ 89.591798] ? __pfx_is_prefetch.isra.0+0x10/0x10

[ 89.592755] ? __rcu_read_unlock+0x50/0x260

[ 89.593617] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.594597] ? search_bpf_extables+0xb3/0xd0

[ 89.595480] ? fixup_exception+0x3b/0x4e0

[ 89.596315] ? exc_page_fault+0x59/0xb0

[ 89.597122] ? asm_exc_page_fault+0x26/0x30

[ 89.597991] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.598940] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.599888] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.600838] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.601798] ? __pfx_ring_buffer_lock_reserve+0x10/0x10

[ 89.602799] ? kasan_report+0x48/0xf0

[ 89.603574] ? ring_buffer_unlock_commit+0xfb/0x250

[ 89.604529] ? kasan_report+0x48/0xf0

[ 89.605293] trace_event_buffer_lock_reserve+0x145/0x210

[ 89.606358] trace_event_buffer_reserve+0xe2/0x150

[ 89.607312] trace_event_raw_event_sched_switch+0xb3/0x2d0

[ 89.608335] ? sched_clock_cpu+0x67/0x2e0

[ 89.609141] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.610276] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.611407] __traceiter_sched_switch+0x59/0x80

[ 89.612286] __schedule+0x72b/0x1580

[ 89.613026] ? __pfx___schedule+0x10/0x10

[ 89.613842] ? ct_nmi_exit+0xd8/0xf0

[ 89.614584] ? irqentry_exit+0x3b/0x50

[ 89.615351] ? rcu_preempt_deferred_qs+0x22/0x90

[ 89.616241] ? ct_kernel_exit.constprop.0+0xa0/0xc0

[ 89.617147] schedule_idle+0x33/0x50

[ 89.617919] do_idle+0x1f3/0x2f0

[ 89.618621] ? __pfx__raw_spin_lock_irqsave+0x10/0x10

[ 89.619603] ? __pfx_do_idle+0x10/0x10

[ 89.620397] ? swake_up_locked.part.0+0x79/0x90

[ 89.621300] cpu_startup_entry+0x1d/0x20

[ 89.622104] start_secondary+0x1a8/0x1d0

[ 89.622889] ? __pfx_start_secondary+0x10/0x10

[ 89.623754] secondary_startup_64_no_verify+0x178/0x17b

[ 89.624725] </TASK>

[ 89.625255] Modules linked in:

[ 89.625972] CR2: 0000000000000008

[ 89.626684] ---[ end trace 0000000000000000 ]---

[ 89.626685] BUG: kernel NULL pointer dereference, address: 0000000000000008

[ 89.627201] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.628002] #PF: supervisor read access in kernel mode

[ 89.628577] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.629117] #PF: error_code(0x0000) - not-present page

[ 89.631094] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.631652] PGD 0

[ 89.632032] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.632582] P4D 0

[ 89.632808] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.633554]

[ 89.633789] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.634533] Oops: 0000 [#2] PREEMPT SMP KASAN PTI

[ 89.634707] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.635450] CPU: 7 PID: 0 Comm: swapper/7 Tainted: G B D W 6.5.0+ #127

[ 89.635957] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.636709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.637515] FS: 0000000000000000(0000) GS:ffff8880bb280000(0000) knlGS:0000000000000000

[ 89.638259] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.639466] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.640291] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.640855] CR2: 0000000000000008 CR3: 00000000102ee000 CR4: 00000000000006e0

[ 89.641450] RSP: 0018:ffffc900001e79f8 EFLAGS: 00010082

[ 89.643342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.644070]

[ 89.644620] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.645349] RAX: 0000000000000000 RBX: 1ffff9200003cf48 RCX: ffffffffa5a808f7

[ 89.645522] Kernel panic - not syncing: Attempted to kill the idle task!

[ 89.646349] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.646352] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.646355] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.646357] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.646363] FS: 0000000000000000(0000) GS:ffff88823ba80000(0000) knlGS:0000000000000000

[ 89.646366] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.646368] CR2: 0000000000000008 CR3: 0000000144c12000 CR4: 00000000000006e0

[ 89.646371] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.646373] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.646375] Call Trace:

[ 89.646376] <TASK>

[ 89.646378] ? __die_body+0x1f/0x70

[ 89.646385] ? page_fault_oops+0x1f5/0x580

[ 89.646390] ? __pfx_page_fault_oops+0x10/0x10

[ 89.646394] ? is_prefetch.isra.0+0x7a/0x260

[ 89.646397] ? __pfx_is_prefetch.isra.0+0x10/0x10

[ 89.646401] ? __rcu_read_unlock+0x50/0x260

[ 89.646405] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.646409] ? search_bpf_extables+0xb3/0xd0

[ 89.646415] ? fixup_exception+0x3b/0x4e0

[ 89.646421] ? exc_page_fault+0x59/0xb0

[ 89.646427] ? asm_exc_page_fault+0x26/0x30

[ 89.646434] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.646437] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.646442] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.646446] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.646450] ? __pfx_ring_buffer_lock_reserve+0x10/0x10

[ 89.646454] ? kasan_report+0x48/0xf0

[ 89.646461] ? ring_buffer_unlock_commit+0xfb/0x250

[ 89.646465] ? kasan_report+0x48/0xf0

[ 89.646471] trace_event_buffer_lock_reserve+0x145/0x210

[ 89.646476] trace_event_buffer_reserve+0xe2/0x150

[ 89.646482] trace_event_raw_event_sched_switch+0xb3/0x2d0

[ 89.646488] ? ct_nmi_exit+0x82/0xf0

[ 89.646492] ? sched_clock_cpu+0x67/0x2e0

[ 89.646497] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.646504] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.646509] __traceiter_sched_switch+0x59/0x80

[ 89.646515] __schedule+0x72b/0x1580

[ 89.646520] ? _raw_spin_unlock_irqrestore+0x16/0x50

[ 89.646527] ? __pfx___schedule+0x10/0x10

[ 89.646531] ? ct_nmi_exit+0xd8/0xf0

[ 89.646535] ? irqentry_exit+0x3b/0x50

[ 89.646541] ? rcu_preempt_deferred_qs+0x22/0x90

[ 89.646545] ? ct_kernel_exit.constprop.0+0xa0/0xc0

[ 89.646550] schedule_idle+0x33/0x50

[ 89.646555] do_idle+0x1f3/0x2f0

[ 89.646559] ? __pfx__raw_spin_lock_irqsave+0x10/0x10

[ 89.646564] ? __pfx_do_idle+0x10/0x10

[ 89.646568] ? swake_up_locked.part.0+0x79/0x90

[ 89.646573] cpu_startup_entry+0x1d/0x20

[ 89.646577] start_secondary+0x1a8/0x1d0

[ 89.646582] ? __pfx_start_secondary+0x10/0x10

[ 89.646587] secondary_startup_64_no_verify+0x178/0x17b

[ 89.646595] </TASK>

[ 89.646596] Modules linked in:

[ 89.646600] CR2: 0000000000000008

[ 89.647328] ---[ end trace 0000000000000000 ]---

[ 89.647329] BUG: kernel NULL pointer dereference, address: 0000000000000008

[ 89.647330] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.647332] #PF: supervisor read access in kernel mode

[ 89.647335] #PF: error_code(0x0000) - not-present page

[ 89.647335] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.647339] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.647342] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.647345] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.647346] PGD 0

[ 89.647347] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.647348] P4D 0

[ 89.647350] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.647351] Oops: 0000 [#3] PREEMPT SMP KASAN PTI

[ 89.647353] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.647355] CPU: 9 PID: 0 Comm: swapper/9 Tainted: G B D W 6.5.0+ #127

[ 89.647359] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.647359] FS: 0000000000000000(0000) GS:ffff88823ba80000(0000) knlGS:0000000000000000

[ 89.647362] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.647361] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.647365] CR2: 0000000000000008 CR3: 0000000144c12000 CR4: 00000000000006e0

[ 89.647366] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.647368] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.647370] RSP: 0018:ffffc90000a0f9f8 EFLAGS: 00010082

[ 89.647370] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.647372]

[ 89.647374] RAX: 0000000000000000 RBX: 1ffff92000141f48 RCX: ffffffffa5a808f7

[ 89.647376] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.647377] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.647379] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.647381] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.647386] FS: 0000000000000000(0000) GS:ffff88823bb80000(0000) knlGS:0000000000000000

[ 89.647389] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.647391] CR2: 0000000000000008 CR3: 0000000235a64000 CR4: 00000000000006e0

[ 89.647392] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.647394] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.647395] Call Trace:

[ 89.647397] <TASK>

[ 89.647399] ? __die_body+0x1f/0x70

[ 89.647403] ? page_fault_oops+0x1f5/0x580

[ 89.647407] ? __pfx_page_fault_oops+0x10/0x10

[ 89.647410] ? is_prefetch.isra.0+0x7a/0x260

[ 89.647413] ? __pfx_is_prefetch.isra.0+0x10/0x10

[ 89.647416] ? __rcu_read_unlock+0x50/0x260

[ 89.647419] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.647422] ? search_bpf_extables+0xb3/0xd0

[ 89.647426] ? fixup_exception+0x3b/0x4e0

[ 89.647431] ? exc_page_fault+0x59/0xb0

[ 89.647435] ? asm_exc_page_fault+0x26/0x30

[ 89.647440] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.647442] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.647446] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.647449] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.647452] ? ring_buffer_lock_reserve+0x25e/0x790

[ 89.647455] ? __pfx_ring_buffer_lock_reserve+0x10/0x10

[ 89.647458] ? kasan_report+0x48/0xf0

[ 89.647463] ? kasan_report+0x48/0xf0

[ 89.647468] trace_event_buffer_lock_reserve+0x145/0x210

[ 89.647473] trace_event_buffer_reserve+0xe2/0x150

[ 89.647477] trace_event_raw_event_sched_switch+0xb3/0x2d0

[ 89.647482] ? ct_nmi_exit+0x82/0xf0

[ 89.647484] ? sched_clock_cpu+0x67/0x2e0

[ 89.647488] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.647494] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.647498] __traceiter_sched_switch+0x59/0x80

[ 89.647502] __schedule+0x72b/0x1580

[ 89.647506] ? _raw_spin_unlock_irqrestore+0x16/0x50

[ 89.647511] ? __pfx___schedule+0x10/0x10

[ 89.647515] ? __pfx_hrtimer_start_range_ns+0x10/0x10

[ 89.647519] ? ct_nmi_exit+0xd8/0xf0

[ 89.647522] ? irqentry_exit+0x3b/0x50

[ 89.647527] ? account_idle_time+0x77/0x90

[ 89.647531] schedule_idle+0x33/0x50

[ 89.647535] do_idle+0x1f3/0x2f0

[ 89.647538] ? __pfx__raw_spin_lock_irqsave+0x10/0x10

[ 89.647542] ? __pfx_do_idle+0x10/0x10

[ 89.647545] ? swake_up_locked.part.0+0x79/0x90

[ 89.647549] cpu_startup_entry+0x1d/0x20

[ 89.647552] start_secondary+0x1a8/0x1d0

[ 89.647556] ? __pfx_start_secondary+0x10/0x10

[ 89.647560] secondary_startup_64_no_verify+0x178/0x17b

[ 89.647566] </TASK>

[ 89.647567] Modules linked in:

[ 89.647569] CR2: 0000000000000008

[ 89.648173] ---[ end trace 0000000000000000 ]---

[ 89.648173] BUG: kernel NULL pointer dereference, address: 0000000000000008

[ 89.648174] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.648178] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.648178] #PF: supervisor read access in kernel mode

[ 89.648181] #PF: error_code(0x0000) - not-present page

[ 89.648181] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.648184] PGD 0

[ 89.648185] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.648186] P4D 0

[ 89.648187] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.648189] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.648189] Oops: 0000 [#4] PREEMPT SMP KASAN PTI

[ 89.648191] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.648194] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.648194] CPU: 5 PID: 0 Comm: swapper/5 Tainted: G B D W 6.5.0+ #127

[ 89.648198] FS: 0000000000000000(0000) GS:ffff88823bb80000(0000) knlGS:0000000000000000

[ 89.648199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.648201] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.648203] CR2: 0000000000000008 CR3: 0000000235a64000 CR4: 00000000000006e0

[ 89.648201] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.648205] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.648207] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.648208] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.648212] RSP: 0018:ffffc900001c79f8 EFLAGS: 00010082

[ 89.648216] RAX: 0000000000000000 RBX: 1ffff92000038f48 RCX: ffffffffa5a808f7

[ 89.648219] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.648221] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffff52000038f80

[ 89.648223] R10: fffff52000038f7f R11: 0000000000000003 R12: 0000000000000000

[ 89.648226] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.648231] FS: 0000000000000000(0000) GS:ffff8880bb480000(0000) knlGS:0000000000000000

[ 89.648234] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.648237] CR2: 0000000000000008 CR3: 0000000235a64000 CR4: 00000000000006e0

[ 89.648239] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.648241] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.648244] Call Trace:

[ 89.648246] <TASK>

[ 89.648248] ? __die_body+0x1f/0x70

[ 89.648253] ? page_fault_oops+0x1f5/0x580

[ 89.648258] ? __pfx_page_fault_oops+0x10/0x10

[ 89.648262] ? is_prefetch.isra.0+0x7a/0x260

[ 89.648266] ? __pfx_is_prefetch.isra.0+0x10/0x10

[ 89.648269] ? __rcu_read_unlock+0x50/0x260

[ 89.648273] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.648277] ? search_bpf_extables+0xb3/0xd0

[ 89.648283] ? fixup_exception+0x3b/0x4e0

[ 89.648289] ? exc_page_fault+0x59/0xb0

[ 89.648294] ? asm_exc_page_fault+0x26/0x30

[ 89.648300] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.648304] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.648308] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.648312] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.648316] ? __pfx_ring_buffer_lock_reserve+0x10/0x10

[ 89.648321] ? kasan_report+0x48/0xf0

[ 89.648327] ? ring_buffer_unlock_commit+0xfb/0x250

[ 89.648330] ? kasan_report+0x48/0xf0

[ 89.648336] trace_event_buffer_lock_reserve+0x145/0x210

[ 89.648342] trace_event_buffer_reserve+0xe2/0x150

[ 89.648347] trace_event_raw_event_sched_switch+0xb3/0x2d0

[ 89.648352] ? strncpy+0x33/0x60

[ 89.648358] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.648363] ? __pfx_trace_save_cmdline+0x10/0x10

[ 89.648371] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.648375] __traceiter_sched_switch+0x59/0x80

[ 89.648381] __schedule+0x72b/0x1580

[ 89.648386] ? _raw_spin_unlock_irqrestore+0x16/0x50

[ 89.648392] ? __pfx___schedule+0x10/0x10

[ 89.648397] ? ct_nmi_exit+0xd8/0xf0

[ 89.648401] ? irqentry_exit+0x3b/0x50

[ 89.648407] ? nr_iowait_cpu+0x46/0x60

[ 89.648412] ? tick_nohz_stop_idle+0x86/0xc0

[ 89.648417] schedule_idle+0x33/0x50

[ 89.648422] do_idle+0x1f3/0x2f0

[ 89.648426] ? __pfx__raw_spin_lock_irqsave+0x10/0x10

[ 89.648431] ? __pfx_do_idle+0x10/0x10

[ 89.648435] ? swake_up_locked.part.0+0x79/0x90

[ 89.648441] cpu_startup_entry+0x1d/0x20

[ 89.648445] start_secondary+0x1a8/0x1d0

[ 89.648450] ? __pfx_start_secondary+0x10/0x10

[ 89.648455] secondary_startup_64_no_verify+0x178/0x17b

[ 89.648463] </TASK>

[ 89.648464] Modules linked in:

[ 89.648466] CR2: 0000000000000008

[ 89.649210] ---[ end trace 0000000000000000 ]---

[ 89.649211] BUG: kernel NULL pointer dereference, address: 0000000000000008

[ 89.649212] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.649215] #PF: supervisor read access in kernel mode

[ 89.649217] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.649218] #PF: error_code(0x0000) - not-present page

[ 89.649221] PGD 0

[ 89.649220] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.649222] P4D 0

[ 89.649223]

[ 89.649224]

[ 89.649225] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.649226] Oops: 0000 [#5] PREEMPT SMP KASAN PTI

[ 89.649228] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.649230] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.649231] CPU: 11 PID: 169 Comm: systemd-journal Tainted: G B D W 6.5.0+ #127

[ 89.649232] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.649235] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.649236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014

[ 89.649241] FS: 0000000000000000(0000) GS:ffff8880bb480000(0000) knlGS:0000000000000000

[ 89.649239] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.649244] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.649245] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.649247] CR2: 0000000000000008 CR3: 0000000235a64000 CR4: 00000000000006e0

[ 89.649250] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.649249] RSP: 0018:ffffc90001d2f7e8 EFLAGS: 00010086

[ 89.649252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.649253]

[ 89.649254] RAX: 0000000000000000 RBX: 1ffff920003a5f06 RCX: ffffffffa5a808f7

[ 89.649258] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.649260] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.649263] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.649265] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.649272] FS: 00007f70b7c81980(0000) GS:ffff88823bc80000(0000) knlGS:0000000000000000

[ 89.649275] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.649278] CR2: 0000000000000008 CR3: 000000014bf78000 CR4: 00000000000006e0

[ 89.649280] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.649282] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.649285] Call Trace:

[ 89.649286] <TASK>

[ 89.649288] ? __die_body+0x1f/0x70

[ 89.649294] ? page_fault_oops+0x1f5/0x580

[ 89.649299] ? __pfx_page_fault_oops+0x10/0x10

[ 89.649302] ? is_prefetch.isra.0+0x7a/0x260

[ 89.649306] ? __pfx_is_prefetch.isra.0+0x10/0x10

[ 89.649310] ? __rcu_read_unlock+0x50/0x260

[ 89.649314] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.649318] ? search_bpf_extables+0xb3/0xd0

[ 89.649324] ? fixup_exception+0x3b/0x4e0

[ 89.649329] ? exc_page_fault+0x59/0xb0

[ 89.649335] ? asm_exc_page_fault+0x26/0x30

[ 89.649341] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.649345] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.649349] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.649353] ? ring_buffer_lock_reserve+0x97/0x790

[ 89.649357] ? __pfx_sched_clock_cpu+0x10/0x10

[ 89.649362] ? do_syscall_64+0x3f/0x90

[ 89.649366] ? record_times+0x8b/0xd0

[ 89.649370] ? __pfx_ring_buffer_lock_reserve+0x10/0x10

[ 89.649374] ? kasan_report+0x48/0xf0

[ 89.649379] ? __pfx_load_balance+0x10/0x10

[ 89.649385] ? kasan_report+0x48/0xf0

[ 89.649389] ? sched_clock+0x10/0x30

[ 89.649395] ? sched_clock_cpu+0x67/0x2e0

[ 89.649400] trace_event_buffer_lock_reserve+0x145/0x210

[ 89.649406] trace_event_buffer_reserve+0xe2/0x150

[ 89.649412] trace_event_raw_event_sched_switch+0xb3/0x2d0

[ 89.649418] ? sched_clock_cpu+0x67/0x2e0

[ 89.649422] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.649429] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10

[ 89.649434] __traceiter_sched_switch+0x59/0x80

[ 89.649440] __schedule+0x72b/0x1580

[ 89.649446] ? __pfx___schedule+0x10/0x10

[ 89.649452] ? stack_trace_save+0x95/0xd0

[ 89.649459] ? futex_wait_setup+0xbe/0x150

[ 89.649465] ? plist_add+0x14c/0x180

[ 89.649472] schedule+0x92/0x120

[ 89.649477] futex_wait_queue+0x87/0xc0

[ 89.649482] futex_wait+0x219/0x3a0

[ 89.649488] ? do_syscall_64+0x3f/0x90

[ 89.649492] ? __pfx_futex_wait+0x10/0x10

[ 89.649499] ? __virt_addr_valid+0xf9/0x180

[ 89.649507] ? trace_hardirqs_on+0x27/0xc0

[ 89.649513] do_futex+0x198/0x230

[ 89.649518] ? __pfx_do_futex+0x10/0x10

[ 89.649524] __x64_sys_futex+0x106/0x290

[ 89.649530] ? __pfx___x64_sys_futex+0x10/0x10

[ 89.649535] ? do_sys_open+0x8e/0xf0

[ 89.649542] do_syscall_64+0x3f/0x90

[ 89.649546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

[ 89.649552] RIP: 0033:0x7f70b8490cd7

[ 89.649555] Code: 52 fe ff ff 0f 1f 80 00 00 00 00 bb ca 00 00 00 eb 20 90 e8 7b 93 00 00 45 31 d2 44 89 e2 31 f6 41 89 c0 4c 89 ef 89 d8 0f 05 <44> 89 c7 e8 c1 93 00 00 45 8b 65 00 45 85 e4 75 d8 eb b6 66 0f 1f

[ 89.649559] RSP: 002b:00007fffce6df9c0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca

[ 89.649564] RAX: ffffffffffffffda RBX: 00000000000000ca RCX: 00007f70b8490cd7

[ 89.649566] RDX: 00000000000001bb RSI: 0000000000000000 RDI: 00007f70b7c809d0

[ 89.649568] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffce6dfba8

[ 89.649570] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000001bb

[ 89.649572] R13: 00007f70b7c809d0 R14: 000055e4be93fc90 R15: 00007f70b7c80700

[ 89.649578] </TASK>

[ 89.649579] Modules linked in:

[ 89.649581] CR2: 0000000000000008

[ 89.650344] ---[ end trace 0000000000000000 ]---

[ 89.650346] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790

[ 89.650351] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 5b 5a 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 b1 1d 23 00 48 89 ef e8 59 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 00 65 8b 2d 00 86 5b 5a 41

[ 89.650354] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082

[ 89.650357] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffffa5a808f7

[ 89.650360] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008

[ 89.650361] RBP: 0000000000000008 R08: ffffffffa5a808f7 R09: fffffbfff50e2e1b

[ 89.650364] R10: fffffbfff50e2e1a R11: ffffffffa87170d7 R12: 0000000000000000

[ 89.650366] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000

[ 89.650371] FS: 00007f70b7c81980(0000) GS:ffff88823bc80000(0000) knlGS:0000000000000000

[ 89.650374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 89.650377] CR2: 0000000000000008 CR3: 000000014bf78000 CR4: 00000000000006e0

[ 89.650379] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

[ 89.650381] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

[ 89.650384] note: systemd-journal[169] exited with irqs disabled

[ 90.684878] Shutting down cpus with NMI

[ 91.022097] Kernel Offset: 0x24800000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)

[ 91.023759] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---

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