On 2023/9/6 19:27, Steven Rostedt wrote:
On Wed, 6 Sep 2023 09:42:44 +0800
Zheng Yejian <zhengyejian1@xxxxxxxxxx> wrote:
Hi, Steve, your new patch seems not fixes the KASAN issue.
I run the instance-event.tc with your patch again and get same KASAN
report.
My config is in:
https://lore.kernel.org/all/da5495b5-cdb5-cb82-dd9b-37e7a87ed97d@xxxxxxxxxx/
I'm not able to reproduce it.
Can you send me the full dmesg.
Hi, Steve,
can you receive the attachments? dmesg log is too long, so
I put them in attachment file:
dmesg before the patch see attachment "dmesg_before_patch"
https://lore.kernel.org/all/20230905183332.628d7cc0@xxxxxxxxxxxxxxxxxx/
and dmesg after above patch see attachment "dmesg_after_patch".
BTW, I do reproduce with following testcase fix, then just run:
./ftracetest test.d/instances/instance-event.tc
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
}
--
Thanks,
Zheng Yejian
Thanks,
-- Steve
root@X8664:/tmp/hulkdt/ftrace# ./ftracetest test.d/instances/instance-event.tc
=== Ftrace unit tests ===
[1] Test creation and deletion of trace instances while setting an event[ 158.084125] ==================================================================
[ 158.087206] BUG: KASAN: slab-use-after-free in __ftrace_event_enable_disable+0x1b/0x3a0
[ 158.089518] Read of size 8 at addr ffff8881462ed390 by task ftracetest/394
[ 158.091492]
[ 158.092452] CPU: 4 PID: 394 Comm: ftracetest Tainted: G W 6.5.0+ #142
[ 158.094719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 158.097195] Call Trace:
[ 158.098022] <TASK>
[ 158.098754] dump_stack_lvl+0x4b/0x80
[ 158.099517] print_report+0xd0/0x620
[ 158.100578] ? __virt_addr_valid+0xf9/0x180
[ 158.101869] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 158.103161] kasan_report+0xb6/0xf0
[ 158.104128] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 158.105137] __ftrace_event_enable_disable+0x1b/0x3a0
[ 158.106091] event_enable_write+0x109/0x170
[ 158.106908] ? __pfx_event_enable_write+0x10/0x10
[ 158.107805] ? __pfx_bpf_lsm_file_permission+0x10/0x10
[ 158.108830] ? security_file_permission+0x51/0x2d0
[ 158.109779] vfs_write+0x175/0x670
[ 158.110563] ? __pfx_vfs_write+0x10/0x10
[ 158.111420] ? __pfx__raw_spin_lock+0x10/0x10
[ 158.112363] ? expand_files+0x9b/0x330
[ 158.113198] ? __pfx_expand_files+0x10/0x10
[ 158.114084] ? set_close_on_exec+0x7b/0xe0
[ 158.114960] ? __fget_light+0xae/0x1e0
[ 158.115779] ? _raw_spin_lock+0x85/0xe0
[ 158.116626] ksys_write+0xbd/0x160
[ 158.117398] ? __pfx_ksys_write+0x10/0x10
[ 158.118267] ? dnotify_flush+0x38/0x220
[ 158.119594] ? fpregs_assert_state_consistent+0x5a/0x70
[ 158.121218] ? exit_to_user_mode_prepare+0x32/0x110
[ 158.122492] do_syscall_64+0x3f/0x90
[ 158.123712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 158.124943] RIP: 0033:0x7f12b328c077
[ 158.126197] 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 4
[ 158.130945] RSP: 002b:00007fff4833be68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 158.133536] RAX: ffffffffffffffda RBX: 000055e244f04540 RCX: 00007f12b328c077
[ 158.135934] RDX: 0000000000000002 RSI: 000055e244f04540 RDI: 0000000000000001
[ 158.138010] RBP: 0000000000000002 R08: 0000000000000000 R09: 000055e244f52ae1
[ 158.140079] R10: 000055e2437e2682 R11: 0000000000000246 R12: 0000000000000001
[ 158.141759] R13: 0000000000000002 R14: 7fffffffffffffff R15: 00007fff4833c030
[ 158.143725] </TASK>
[ 158.144604]
[ 158.145091] Allocated by task 395:
[ 158.146419] [452/18554]
[ 158.146987] Freed by task 436:
[ 158.147782]
[ 158.148525] The buggy address belongs to the object at ffff8881462ed380
[ 158.148525] which belongs to the cache trace_event_file of size 96
[ 158.151275] The buggy address is located 16 bytes inside of
[ 158.151275] freed 96-byte region [ffff8881462ed380, ffff8881462ed3e0)
[ 158.153443]
[ 158.153922] The buggy address belongs to the physical page:
[ 158.155053]
[ 158.155520] Memory state around the buggy address:
[ 158.156516] ffff8881462ed280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 158.157927] ffff8881462ed300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 158.159330] >ffff8881462ed380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 158.160752] ^
[ 158.161583] ffff8881462ed400: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 158.162996] ffff8881462ed480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 158.164420] ==================================================================
[ 158.173856] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 158.176166] #PF: supervisor read access in kernel mode
[ 158.177589] #PF: error_code(0x0000) - not-present page
[ 158.178697] PGD 0 P4D 0
[ 158.179373] Oops: 0000 [#1] PREEMPT SMP KASAN PTI
[ 158.180449] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G B W 6.5.0+ #142
[ 158.182066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 158.184390] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.185595] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 158.189239] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.190243] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.191566] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.192928] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.194188] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.195519] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.196793] FS: 0000000000000000(0000) GS:ffff8880b7080000(0000) knlGS:0000000000000000
[ 158.198297] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.199330] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.200615] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.201929] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.203250] Call Trace:
[ 158.203838] <TASK>
[ 158.204401] ? __die_body+0x1f/0x70
[ 158.205161] ? page_fault_oops+0x1f5/0x580
[ 158.206028] ? __pfx_page_fault_oops+0x10/0x10
[ 158.206947] ? is_prefetch.isra.0+0x7a/0x260
[ 158.207821] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 158.208777] ? __rcu_read_unlock+0x50/0x260
[ 158.209655] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.210634] ? search_bpf_extables+0xb3/0xd0
[ 158.211469] ? fixup_exception+0x3b/0x4e0
[ 158.212312] ? arch_stack_walk+0x8c/0x100
[ 158.213165] ? exc_page_fault+0x59/0xb0
[ 158.213987] ? asm_exc_page_fault+0x26/0x30
[ 158.214849] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.215750] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.216700] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.217644] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.218615] ? ring_buffer_lock_reserve+0x25e/0x790
[ 158.219563] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 158.220594] ? kasan_report+0x48/0xf0
[ 158.221369] ? kasan_report+0x48/0xf0
[ 158.222122] trace_event_buffer_lock_reserve+0x145/0x210
[ 158.223172] trace_event_buffer_reserve+0xe2/0x150
[ 158.224141] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 158.225225] ? ct_nmi_exit+0x82/0xf0
[ 158.226006] ? sched_clock_cpu+0x67/0x2e0
[ 158.226845] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.227929] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.229101] __traceiter_sched_switch+0x59/0x80
[ 158.229964] __schedule+0x72b/0x1580
[ 158.230684] ? _raw_spin_unlock_irqrestore+0x16/0x50
[ 158.231676] ? __pfx___schedule+0x10/0x10
[ 158.232520] ? __pfx_hrtimer_start_range_ns+0x10/0x10
[ 158.233527] ? ct_nmi_exit+0xd8/0xf0
[ 158.234283] ? irqentry_exit+0x3b/0x50
[ 158.235078] ? account_idle_time+0x77/0x90
[ 158.235845] schedule_idle+0x33/0x50
[ 158.236574] do_idle+0x1f3/0x2f0
[ 158.237252] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 158.238258] ? __pfx_do_idle+0x10/0x10
[ 158.239021] ? swake_up_locked.part.0+0x79/0x90
[ 158.239951] cpu_startup_entry+0x1d/0x20
[ 158.240792] start_secondary+0x1a8/0x1d0
[ 158.241635] ? __pfx_start_secondary+0x10/0x10
[ 158.242565] secondary_startup_64_no_verify+0x178/0x17b
[ 158.243565] </TASK>
[ 158.244130] Modules linked in:
[ 158.244819] CR2: 0000000000000008
[ 158.245580] ---[ end trace 0000000000000000 ]---
[ 158.245581] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 158.246120] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.246925] #PF: supervisor read access in kernel mode
[ 158.247515] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 158.248135] #PF: error_code(0x0000) - not-present page
[ 158.250275] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.250890] PGD 0
[ 158.251292]
[ 158.251914] P4D 0
[ 158.252122] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.252322]
[ 158.252575] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.253423] Oops: 0000 [#2] PREEMPT SMP KASAN PTI
[ 158.253582] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.254416] CPU: 4 PID: 394 Comm: ftracetest Tainted: G B D W 6.5.0+ #142
[ 158.254938] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.255783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 158.256657] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.257511] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.258737] FS: 0000000000000000(0000) GS:ffff8880b7080000(0000) knlGS:0000000000000000
[ 158.259588] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 158.260161] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.261085] RSP: 0018:ffffc900024bf7c8 EFLAGS: 00010082
[ 158.263138] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.263796]
[ 158.264408] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.266198] RAX: 0000000000000000 RBX: 1ffff92000497f02 RCX: ffffffff9d8808f7
[ 158.266358] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.267177] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.267985] Kernel panic - not syncing: Attempted to kill the idle task!
[ 158.268881] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffff52000497f3a
[ 158.268885] R10: fffff52000497f39 R11: 0000000000000003 R12: 0000000000000000
[ 158.268888] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.268894] FS: 0000000000000000(0000) GS:ffff8880b7200000(0000) knlGS:0000000000000000
[ 158.268898] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.268900] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.268903] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.268905] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.268907] Call Trace:
[ 158.268910] <TASK>
[ 158.268912] ? __die_body+0x1f/0x70
[ 158.268921] ? page_fault_oops+0x1f5/0x580
[ 158.268928] ? __pfx_page_fault_oops+0x10/0x10
[ 158.268931] ? is_prefetch.isra.0+0x7a/0x260
[ 158.268935] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 158.268939] ? __rcu_read_unlock+0x50/0x260
[ 158.268945] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.268949] ? search_bpf_extables+0xb3/0xd0
[ 158.268957] ? fixup_exception+0x3b/0x4e0
[ 158.268963] ? exc_page_fault+0x59/0xb0
[ 158.268971] ? asm_exc_page_fault+0x26/0x30
[ 158.268978] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.268982] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.268986] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.268990] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.268995] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 158.268999] ? stack_trace_save+0x95/0xd0
[ 158.269008] ? kasan_report+0x48/0xf0
[ 158.269014] ? filter_irq_stacks+0x21/0x70
[ 158.269019] ? __stack_depot_save+0x38/0x480
[ 158.269027] ? task_work_run+0xfd/0x170
[ 158.269035] ? kasan_report+0x48/0xf0
[ 158.269040] ? __accumulate_pelt_segments+0x38/0xc0
[ 158.269050] trace_event_buffer_lock_reserve+0x145/0x210
[ 158.269136] trace_event_buffer_reserve+0xe2/0x150
[ 158.269143] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 158.269152] ? strncpy+0x33/0x60
[ 158.269159] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.269164] ? __pfx_trace_save_cmdline+0x10/0x10
[ 158.269171] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.269175] __traceiter_sched_switch+0x59/0x80
[ 158.269186] __schedule+0x72b/0x1580
[ 158.269194] ? __pfx___schedule+0x10/0x10
[ 158.269199] ? do_notify_parent+0x397/0x4c0
[ 158.269208] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 158.269213] ? __rcu_read_unlock+0x50/0x260
[ 158.269217] ? __rcu_read_lock+0x33/0x50
[ 158.269223] do_task_dead+0x5a/0x60
[ 158.269230] do_exit+0xd4b/0x1340
[ 158.269237] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.269242] ? __pfx_do_exit+0x10/0x10
[ 158.269248] ? _raw_spin_lock_irq+0x93/0xf0
[ 158.269253] do_group_exit+0x5c/0xf0
[ 158.269259] get_signal+0xdfa/0xe10
[ 158.269264] ? security_file_permission+0x51/0x2d0
[ 158.269270] ? vfs_write+0x3c1/0x670
[ 158.269274] ? __pfx_get_signal+0x10/0x10
[ 158.269278] ? __pfx_vfs_write+0x10/0x10
[ 158.269283] ? __pfx__raw_spin_lock+0x10/0x10
[ 158.269287] ? expand_files+0x9b/0x330
[ 158.269293] arch_do_signal_or_restart+0x7a/0x350
[ 158.269299] ? __pfx_arch_do_signal_or_restart+0x10/0x10
[ 158.269303] ? __fget_light+0xae/0x1e0
[ 158.269308] ? _raw_spin_lock+0x85/0xe0
[ 158.269313] ? ksys_write+0xd2/0x160
[ 158.269318] ? __pfx_ksys_write+0x10/0x10
[ 158.269323] ? dnotify_flush+0x38/0x220
[ 158.269329] exit_to_user_mode_prepare+0xbe/0x110
[ 158.269335] syscall_exit_to_user_mode+0x2b/0x60
[ 158.269341] do_syscall_64+0x4c/0x90
[ 158.269346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 158.269352] RIP: 0033:0x7f12b328c077
[ 158.269355] Code: Unable to access opcode bytes at 0x7f12b328c04d.
[ 158.269357] RSP: 002b:00007fff4833be68 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 158.269362] RAX: 0000000000000002 RBX: 000055e244f04540 RCX: 00007f12b328c077
[ 158.269364] RDX: 0000000000000002 RSI: 000055e244f04540 RDI: 0000000000000001
[ 158.269367] RBP: 0000000000000002 R08: 0000000000000000 R09: 000055e244f52ae1
[ 158.269369] R10: 000055e2437e2682 R11: 0000000000000246 R12: 0000000000000001
[ 158.269371] R13: 0000000000000002 R14: 7fffffffffffffff R15: 00007fff4833c030
[ 158.269376] </TASK>
[ 158.269378] Modules linked in:
[ 158.269382] CR2: 0000000000000008
[ 158.270186] ---[ end trace 0000000000000000 ]---
[ 158.270187] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 158.270189] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.270195] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.270195] #PF: supervisor read access in kernel mode
[ 158.270200] #PF: error_code(0x0000) - not-present page
[ 158.270201] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.270205] PGD 0
[ 158.270206]
[ 158.270208] P4D 0
[ 158.270210] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.270213]
[ 158.270214] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.270216] Oops: 0000 [#3] PREEMPT SMP KASAN PTI
[ 158.270218] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.270224] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.270227] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.270225] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G B D W 6.5.0+ #142
[ 158.270234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd44
[ 158.270235] FS: 0000000000000000(0000) GS:ffff8880b7200000(0000) knlGS:0000000000000000
[ 158.270240] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.270237] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.270243] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.270246] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.270247] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.270250] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.270254] RSP: 0018:ffffc900001a79f8 EFLAGS: 00010082
[ 158.270256] note: ftracetest[394] exited with irqs disabled
[ 158.270259]
[ 158.270262] RAX: 0000000000000000 RBX: 1ffff92000034f48 RCX: ffffffff9d8808f7
[ 158.270266] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.270269] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.270272] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.270274] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.270282] FS: 0000000000000000(0000) GS:ffff8880b7180000(0000) knlGS:0000000000000000
[ 158.270285] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.270288] CR2: 0000000000000008 CR3: 00000001461a2000 CR4: 00000000000006e0
[ 158.270291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.270293] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.270295] Call Trace:
[ 158.270298] <TASK>
[ 158.270300] ? __die_body+0x1f/0x70
[ 158.270308] ? page_fault_oops+0x1f5/0x580
[ 158.270314] ? __pfx_page_fault_oops+0x10/0x10
[ 158.270332] ? is_prefetch.isra.0+0x7a/0x260
[ 158.270336] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 158.270340] ? __rcu_read_unlock+0x50/0x260
[ 158.270345] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.270349] ? search_bpf_extables+0xb3/0xd0
[ 158.270356] ? fixup_exception+0x3b/0x4e0
[ 158.270362] ? exc_page_fault+0x59/0xb0
[ 158.270370] ? asm_exc_page_fault+0x26/0x30
[ 158.270378] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.270381] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.270386] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.270390] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.270394] ? __pfx_sched_clock_cpu+0x10/0x10
[ 158.270401] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 158.270406] ? kasan_report+0x48/0xf0
[ 158.270413] ? __pfx_load_balance+0x10/0x10
[ 158.270420] ? update_rq_clock+0x307/0x3f0
[ 158.270427] ? kasan_report+0x48/0xf0
[ 158.270432] ? sched_clock+0x10/0x30
[ 158.270439] ? sched_clock_cpu+0x67/0x2e0
[ 158.270444] trace_event_buffer_lock_reserve+0x145/0x210
[ 158.270450] trace_event_buffer_reserve+0xe2/0x150
[ 158.270457] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 158.270463] ? ct_nmi_exit+0x82/0xf0
[ 158.270469] ? sched_clock_cpu+0x67/0x2e0
[ 158.270474] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.270481] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.270485] __traceiter_sched_switch+0x59/0x80
[ 158.270492] __schedule+0x72b/0x1580
[ 158.270497] ? _raw_spin_unlock_irqrestore+0x16/0x50
[ 158.270504] ? __pfx___schedule+0x10/0x10
[ 158.270509] ? ct_nmi_exit+0xd8/0xf0
[ 158.270514] ? irqentry_exit+0x3b/0x50
[ 158.270520] ? rcu_preempt_deferred_qs+0x22/0x90
[ 158.270526] ? ct_kernel_exit.constprop.0+0xa0/0xc0
[ 158.270532] schedule_idle+0x33/0x50
[ 158.270537] do_idle+0x1f3/0x2f0
[ 158.270543] ? __pfx_do_idle+0x10/0x10
[ 158.270546] ? finish_task_switch+0x99/0x370
[ 158.270553] ? schedule_idle+0x3b/0x50
[ 158.270558] cpu_startup_entry+0x1d/0x20
[ 158.270562] start_secondary+0x1a8/0x1d0
[ 158.270568] ? __pfx_start_secondary+0x10/0x10
[ 158.270574] secondary_startup_64_no_verify+0x178/0x17b
[ 158.270582] </TASK>
[ 158.270584] Modules linked in:
[ 158.270587] CR2: 0000000000000008
[ 158.271325] ---[ end trace 0000000000000000 ]---
[ 158.271326] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 158.271327] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.271331] #PF: supervisor read access in kernel mode
[ 158.271333] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.271335] #PF: error_code(0x0000) - not-present page
[ 158.271337] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.271338] PGD 0 P4D 0
[ 158.271340]
[ 158.271342]
[ 158.271342] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.271344] Oops: 0000 [#4] PREEMPT SMP KASAN PTI
[ 158.271345] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.271348] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.271351] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.271350] CPU: 5 PID: 169 Comm: systemd-journal Tainted: G B D W 6.5.0+ #142
[ 158.271354] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.271356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd44
[ 158.271360] FS: 0000000000000000(0000) GS:ffff8880b7180000(0000) knlGS:0000000000000000
[ 158.271359] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.271364] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.271367] CR2: 0000000000000008 CR3: 00000001461a2000 CR4: 00000000000006e0
[ 158.271367] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.271370] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.271372] RSP: 0018:ffffc90001d3f7e8 EFLAGS: 00010086
[ 158.271372] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.271375]
[ 158.271377] RAX: 0000000000000000 RBX: 1ffff920003a7f06 RCX: ffffffff9d8808f7
[ 158.271380] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.271383] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.271385] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.271388] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.271395] FS: 00007ff2899d0980(0000) GS:ffff8880b7280000(0000) knlGS:0000000000000000
[ 158.271398] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.271401] CR2: 0000000000000008 CR3: 000000014c41c000 CR4: 00000000000006e0
[ 158.271404] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.271406] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.271408] Call Trace:
[ 158.271410] <TASK>
[ 158.271412] ? __die_body+0x1f/0x70
[ 158.271419] ? page_fault_oops+0x1f5/0x580
[ 158.271424] ? __pfx_page_fault_oops+0x10/0x10
[ 158.271428] ? is_prefetch.isra.0+0x7a/0x260
[ 158.271432] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 158.271435] ? __rcu_read_unlock+0x50/0x260
[ 158.271440] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.271444] ? search_bpf_extables+0xb3/0xd0
[ 158.271450] ? fixup_exception+0x3b/0x4e0
[ 158.271456] ? exc_page_fault+0x59/0xb0
[ 158.271463] ? asm_exc_page_fault+0x26/0x30
[ 158.271469] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.271472] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.271477] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.271481] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.271484] ? do_sys_openat2+0x301/0x350
[ 158.271489] ? do_sys_open+0x8e/0xf0
[ 158.271494] ? do_syscall_64+0x3f/0x90
[ 158.271498] ? entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 158.271503] ? __pfx_lockref_put_or_lock+0x10/0x10
[ 158.271512] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 158.271516] ? try_grab_folio+0x2e0/0x4e0
[ 158.271521] ? kasan_report+0x48/0xf0
[ 158.271526] ? __rcu_read_unlock+0x50/0x260
[ 158.271530] ? trace_hardirqs_on+0x27/0xc0
[ 158.271536] ? internal_get_user_pages_fast+0x5b7/0x15a0
[ 158.271540] ? kasan_report+0x48/0xf0
[ 158.271545] ? __accumulate_pelt_segments+0x38/0xc0
[ 158.271553] trace_event_buffer_lock_reserve+0x145/0x210
[ 158.271559] trace_event_buffer_reserve+0xe2/0x150
[ 158.271565] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 158.271572] ? sched_clock_cpu+0x67/0x2e0
[ 158.271578] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.271586] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.271590] __traceiter_sched_switch+0x59/0x80
[ 158.271598] __schedule+0x72b/0x1580
[ 158.271604] ? __pfx___schedule+0x10/0x10
[ 158.271609] ? stack_trace_save+0x95/0xd0
[ 158.271618] ? futex_wait_setup+0xbe/0x150
[ 158.271626] ? plist_add+0x14c/0x180
[ 158.271634] schedule+0x92/0x120
[ 158.271639] futex_wait_queue+0x87/0xc0
[ 158.271645] futex_wait+0x219/0x3a0
[ 158.271651] ? do_syscall_64+0x3f/0x90
[ 158.271655] ? __pfx_futex_wait+0x10/0x10
[ 158.271662] ? __virt_addr_valid+0xf9/0x180
[ 158.271670] ? trace_hardirqs_on+0x27/0xc0
[ 158.271676] do_futex+0x198/0x230
[ 158.271681] ? __pfx_do_futex+0x10/0x10
[ 158.271687] __x64_sys_futex+0x106/0x290
[ 158.271693] ? __pfx___x64_sys_futex+0x10/0x10
[ 158.271697] ? do_sys_open+0x8e/0xf0
[ 158.271703] do_syscall_64+0x3f/0x90
[ 158.271707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 158.271712] RIP: 0033:0x7ff28a1decd7
[ 158.272819] 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 f
[ 158.272826] RSP: 002b:00007ffcc907a7d0 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
[ 158.272832] RAX: ffffffffffffffda RBX: 00000000000000ca RCX: 00007ff28a1decd7
[ 158.272835] RDX: 00000000000001b8 RSI: 0000000000000000 RDI: 00007ff2899cf9d0
[ 158.272837] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcc907a9b8
[ 158.272840] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000001b8
[ 158.272842] R13: 00007ff2899cf9d0 R14: 000055ed59198320 R15: 00007ff2899cf700
[ 158.272848] </TASK>
[ 158.272849] Modules linked in:
[ 158.272852] CR2: 0000000000000008
[ 158.273695] ---[ end trace 0000000000000000 ]---
[ 158.273696] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 158.273698] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.273701] #PF: supervisor read access in kernel mode
[ 158.273705] #PF: error_code(0x0000) - not-present page
[ 158.273705] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.273709] PGD 0
[ 158.273710] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.273711] P4D 0
[ 158.273714]
[ 158.273716] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.273716] Oops: 0000 [#5] PREEMPT SMP KASAN PTI
[ 158.273719] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.273721] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.273722] CPU: 8 PID: 0 Comm: swapper/8 Tainted: G B D W 6.5.0+ #142
[ 158.273724] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.273726] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.273727] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd44
[ 158.273733] FS: 00007ff2899d0980(0000) GS:ffff8880b7280000(0000) knlGS:0000000000000000
[ 158.273731] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.273737] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.273739] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.273741] CR2: 0000000000000008 CR3: 000000014c41c000 CR4: 00000000000006e0
[ 158.273744] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.273744] RSP: 0018:ffffc900001f79f8 EFLAGS: 00010082
[ 158.273747] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.273749] RAX: 0000000000000000 RBX: 1ffff9200003ef48 RCX: ffffffff9d8808f7
[ 158.273751] note: systemd-journal[169] exited with irqs disabled
[ 158.273753] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.273756] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffff5200003ef80
[ 158.273758] R10: fffff5200003ef7f R11: 0000000000000003 R12: 0000000000000000
[ 158.273761] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.273767] FS: 0000000000000000(0000) GS:ffff88823bb00000(0000) knlGS:0000000000000000
[ 158.273771] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.273773] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.273776] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.273778] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.273780] Call Trace:
[ 158.273782] <TASK>
[ 158.273785] ? __die_body+0x1f/0x70
[ 158.273791] ? page_fault_oops+0x1f5/0x580
[ 158.273796] ? __pfx_page_fault_oops+0x10/0x10
[ 158.273800] ? is_prefetch.isra.0+0x7a/0x260
[ 158.273803] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 158.273807] ? __rcu_read_unlock+0x50/0x260
[ 158.273818] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.273822] ? search_bpf_extables+0xb3/0xd0
[ 158.273828] ? fixup_exception+0x3b/0x4e0
[ 158.273832] ? arch_stack_walk+0x8c/0x100
[ 158.273838] ? exc_page_fault+0x59/0xb0
[ 158.273844] ? asm_exc_page_fault+0x26/0x30
[ 158.273851] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.273854] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.273858] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.273862] ? ring_buffer_lock_reserve+0x97/0x790
[ 158.273866] ? cpu_startup_entry+0x1d/0x20
[ 158.273870] ? start_secondary+0x1a8/0x1d0
[ 158.273875] ? secondary_startup_64_no_verify+0x178/0x17b
[ 158.273880] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 158.273884] ? kasan_report+0x48/0xf0
[ 158.273890] ? ring_buffer_unlock_commit+0xfb/0x250
[ 158.273895] ? kasan_report+0x48/0xf0
[ 158.273901] trace_event_buffer_lock_reserve+0x145/0x210
[ 158.273907] trace_event_buffer_reserve+0xe2/0x150
[ 158.273913] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 158.273919] ? strncpy+0x33/0x60
[ 158.273925] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.273930] ? __pfx_trace_save_cmdline+0x10/0x10
[ 158.273938] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 158.273943] __traceiter_sched_switch+0x59/0x80
[ 158.273950] __schedule+0x72b/0x1580
[ 158.273955] ? _raw_spin_unlock_irqrestore+0x16/0x50
[ 158.273961] ? __pfx___schedule+0x10/0x10
[ 158.273966] ? ct_nmi_exit+0xd8/0xf0
[ 158.273971] ? irqentry_exit+0x3b/0x50
[ 158.273978] ? nr_iowait_cpu+0x46/0x60
[ 158.273984] ? tick_nohz_stop_idle+0x86/0xc0
[ 158.273991] schedule_idle+0x33/0x50
[ 158.273996] do_idle+0x1f3/0x2f0
[ 158.273999] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 158.274005] ? __pfx_do_idle+0x10/0x10
[ 158.274009] ? swake_up_locked.part.0+0x79/0x90
[ 158.274015] cpu_startup_entry+0x1d/0x20
[ 158.274019] start_secondary+0x1a8/0x1d0
[ 158.274024] ? __pfx_start_secondary+0x10/0x10
[ 158.274029] secondary_startup_64_no_verify+0x178/0x17b
[ 158.274037] </TASK>
[ 158.274038] Modules linked in:
[ 158.274041] CR2: 0000000000000008
[ 158.274913] ---[ end trace 0000000000000000 ]---
[ 158.274915] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 158.274919] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 7b 62 48 8d 6f 08 be 04 00 1
[ 158.274923] RSP: 0018:ffffc900001879f8 EFLAGS: 00010082
[ 158.274926] RAX: 0000000000000000 RBX: 1ffff92000030f48 RCX: ffffffff9d8808f7
[ 158.274928] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 158.274931] RBP: 0000000000000008 R08: ffffffff9d8808f7 R09: fffffbfff40a2d33
[ 158.274933] R10: fffffbfff40a2d32 R11: ffffffffa0516997 R12: 0000000000000000
[ 158.274935] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 158.274941] FS: 0000000000000000(0000) GS:ffff88823bb00000(0000) knlGS:0000000000000000
[ 158.274944] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.274946] CR2: 0000000000000008 CR3: 0000000117664000 CR4: 00000000000006e0
[ 158.274949] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.274951] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 159.308316] Shutting down cpus with NMI
[ 159.676967] Kernel Offset: 0x1c600000 from 0xffffffff81000000 (relocation range: 0xfffffff)
[ 159.678609] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---
root@X8664:/tmp/hulkdt/ftrace# ./ftracetest test.d/instances/instance-event.tc
=== Ftrace unit tests ===
[1] Test creation and deletion of trace instances while setting an event[ 53.896538] ==================================================================
[ 53.900580] BUG: KASAN: slab-use-after-free in __ftrace_event_enable_disable+0x1b/0x3a0
[ 53.903377] Read of size 8 at addr ffff8880107f4590 by task ftracetest/393
[ 53.906167]
[ 53.907597] CPU: 5 PID: 393 Comm: ftracetest Tainted: G W 6.5.0+ #143
[ 53.911284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 53.914338] Call Trace:
[ 53.914934] <TASK>
[ 53.915443] dump_stack_lvl+0x4b/0x80
[ 53.916293] print_report+0xd0/0x620
[ 53.917068] ? __virt_addr_valid+0xf9/0x180
[ 53.917979] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 53.919060] kasan_report+0xb6/0xf0
[ 53.919830] ? __ftrace_event_enable_disable+0x1b/0x3a0
[ 53.920977] __ftrace_event_enable_disable+0x1b/0x3a0
[ 53.922042] event_enable_write+0x109/0x170
[ 53.922924] ? __pfx_event_enable_write+0x10/0x10
[ 53.923923] ? __pfx_bpf_lsm_file_permission+0x10/0x10
[ 53.924992] ? security_file_permission+0x51/0x2d0
[ 53.926023] vfs_write+0x175/0x670
[ 53.926902] ? __pfx_vfs_write+0x10/0x10
[ 53.927778] ? __pfx__raw_spin_lock+0x10/0x10
[ 53.928821] ? expand_files+0x9b/0x330
[ 53.929653] ? __pfx_expand_files+0x10/0x10
[ 53.930591] ? set_close_on_exec+0x7b/0xe0
[ 53.931453] ? __fget_light+0xae/0x1e0
[ 53.932275] ? _raw_spin_lock+0x85/0xe0
[ 53.933100] ksys_write+0xbd/0x160
[ 53.933864] ? __pfx_ksys_write+0x10/0x10
[ 53.934715] ? dnotify_flush+0x38/0x220
[ 53.935530] ? fpregs_assert_state_consistent+0x5a/0x70
[ 53.936569] ? exit_to_user_mode_prepare+0x32/0x110
[ 53.937553] do_syscall_64+0x3f/0x90
[ 53.938354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 53.939396] RIP: 0033:0x7fdf1faf7077
[ 53.940200] 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 4
[ 53.943488] RSP: 002b:00007ffee98d8cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 53.944957] RAX: ffffffffffffffda RBX: 000055e92c929540 RCX: 00007fdf1faf7077
[ 53.946272] RDX: 0000000000000002 RSI: 000055e92c929540 RDI: 0000000000000001
[ 53.947583] RBP: 0000000000000002 R08: 0000000000000000 R09: 000055e92c977ae1
[ 53.948920] R10: 000055e92ac8c682 R11: 0000000000000246 R12: 0000000000000001
[ 53.950252] R13: 0000000000000002 R14: 7fffffffffffffff R15: 00007ffee98d8e90
[ 53.951587] </TASK>
[ 53.952159]
[ 53.952612] Allocated by task 394:
[ 53.953446]
[ 53.953924] Freed by task 437:
[ 53.954715]
[ 53.955195] The buggy address belongs to the object at ffff8880107f4580
[ 53.955195] which belongs to the cache trace_event_file of size 96
[ 53.957541] The buggy address is located 16 bytes inside of
[ 53.957541] freed 96-byte region [ffff8880107f4580, ffff8880107f45e0)
[ 53.959763]
[ 53.960245] The buggy address belongs to the physical page:
[ 53.961402]
[ 53.961873] Memory state around the buggy address:
[ 53.962871] ffff8880107f4480: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 53.964472] ffff8880107f4500: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 53.965913] >ffff8880107f4580: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 53.967279] ^
[ 53.968089] ffff8880107f4600: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 53.969505] ffff8880107f4680: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
[ 53.970905] ==================================================================
[ 53.973686] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 53.975536] #PF: supervisor read access in kernel mode
[ 53.976954] #PF: error_code(0x0000) - not-present page
[ 53.978374] PGD 0 P4D 0
[ 53.979210] Oops: 0000 [#1] PREEMPT SMP KASAN PTI
[ 53.980559] CPU: 10 PID: 0 Comm: swapper/10 Tainted: G B W 6.5.0+ #143
[ 53.982589] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 53.985083] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 53.985930] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 53.988522] RSP: 0018:ffffc90000a1f9f8 EFLAGS: 00010082
[ 53.989327] RAX: 0000000000000000 RBX: 1ffff92000143f48 RCX: ffffffffa3e808f7
[ 53.990348] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 53.991367] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 53.992424] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 53.993485] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 53.994555] FS: 0000000000000000(0000) GS:ffff88823bc00000(0000) knlGS:0000000000000000
[ 53.995754] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 53.996618] CR2: 0000000000000008 CR3: 0000000146440000 CR4: 00000000000006e0
[ 53.997671] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 53.998758] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 53.999795] Call Trace:
[ 54.000257] <TASK>
[ 54.000673] ? __die_body+0x1f/0x70
[ 54.001258] ? page_fault_oops+0x1f5/0x580
[ 54.001926] ? __pfx_page_fault_oops+0x10/0x10
[ 54.002609] ? is_prefetch.isra.0+0x7a/0x260
[ 54.003276] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 54.003993] ? __rcu_read_unlock+0x50/0x260
[ 54.004642] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.005322] ? search_bpf_extables+0xb3/0xd0
[ 54.005941] ? fixup_exception+0x3b/0x4e0
[ 54.006531] ? exc_page_fault+0x59/0xb0
[ 54.007113] ? asm_exc_page_fault+0x26/0x30
[ 54.007727] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.008419] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.009090] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.009740] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.010405] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 54.011102] ? kasan_report+0x48/0xf0
[ 54.011644] ? ring_buffer_unlock_commit+0xfb/0x250
[ 54.012344] ? kasan_report+0x48/0xf0
[ 54.012908] trace_event_buffer_lock_reserve+0x145/0x210
[ 54.013631] trace_event_buffer_reserve+0xe2/0x150
[ 54.014307] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 54.015068] ? sched_clock_cpu+0x67/0x2e0
[ 54.015664] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.016486] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.017298] __traceiter_sched_switch+0x59/0x80
[ 54.017952] __schedule+0x72b/0x1580
[ 54.018499] ? __pfx___schedule+0x10/0x10
[ 54.019091] ? ct_nmi_exit+0xd8/0xf0
[ 54.019623] ? irqentry_exit+0x3b/0x50
[ 54.020172] ? rcu_preempt_deferred_qs+0x22/0x90
[ 54.020841] ? ct_kernel_exit.constprop.0+0xa0/0xc0
[ 54.021517] schedule_idle+0x33/0x50
[ 54.022073] do_idle+0x1f3/0x2f0
[ 54.022585] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 54.023311] ? __pfx_do_idle+0x10/0x10
[ 54.023895] ? swake_up_locked.part.0+0x79/0x90
[ 54.024549] cpu_startup_entry+0x1d/0x20
[ 54.025147] start_secondary+0x1a8/0x1d0
[ 54.025735] ? __pfx_start_secondary+0x10/0x10
[ 54.026364] secondary_startup_64_no_verify+0x178/0x17b
[ 54.027089] </TASK>
[ 54.027481] Modules linked in:
[ 54.027967] CR2: 0000000000000008
[ 54.028493] ---[ end trace 0000000000000000 ]---
[ 54.028494] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 54.028859] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.029560] #PF: supervisor read access in kernel mode
[ 54.029987] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.030524] #PF: error_code(0x0000) - not-present page
[ 54.031912] RSP: 0018:ffffc90000a1f9f8 EFLAGS: 00010082
[ 54.032458] PGD 0
[ 54.032722]
[ 54.032724] RAX: 0000000000000000 RBX: 1ffff92000143f48 RCX: ffffffffa3e808f7
[ 54.033264] P4D 0
[ 54.033438] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.033611]
[ 54.034164] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.034390] Oops: 0000 [#2] PREEMPT SMP KASAN PTI
[ 54.034947] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.035120] CPU: 5 PID: 393 Comm: ftracetest Tainted: G B D W 6.5.0+ #143
[ 54.035669] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.036159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 54.036726] FS: 0000000000000000(0000) GS:ffff88823bc00000(0000) knlGS:0000000000000000
[ 54.037524] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.038081] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.039249] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.039877] CR2: 0000000000000008 CR3: 0000000146440000 CR4: 00000000000006e0
[ 54.040446] RSP: 0018:ffffc900024cf7c8 EFLAGS: 00010082
[ 54.040899] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.042770]
[ 54.043316] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.043851] RAX: 0000000000000000 RBX: 1ffff92000499f02 RCX: ffffffffa3e808f7
[ 54.044409] Kernel panic - not syncing: Attempted to kill the idle task!
[ 54.044599] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.044602] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffff52000499f3a
[ 54.044605] R10: fffff52000499f39 R11: 0000000000000003 R12: 0000000000000000
[ 54.044608] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.044614] FS: 0000000000000000(0000) GS:ffff8880b7280000(0000) knlGS:0000000000000000
[ 54.044618] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.044620] CR2: 0000000000000008 CR3: 00000000bbc64000 CR4: 00000000000006e0
[ 54.044623] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.044625] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.044627] Call Trace:
[ 54.044629] <TASK>
[ 54.044631] ? __die_body+0x1f/0x70
[ 54.044645] ? page_fault_oops+0x1f5/0x580
[ 54.044650] ? __pfx_page_fault_oops+0x10/0x10
[ 54.044654] ? is_prefetch.isra.0+0x7a/0x260
[ 54.044657] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 54.044661] ? __rcu_read_unlock+0x50/0x260
[ 54.044666] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.044669] ? search_bpf_extables+0xb3/0xd0
[ 54.044676] ? fixup_exception+0x3b/0x4e0
[ 54.044682] ? exc_page_fault+0x59/0xb0
[ 54.044689] ? asm_exc_page_fault+0x26/0x30
[ 54.044696] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.044700] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.044704] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.044708] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.044712] ? __pfx_sched_clock_cpu+0x10/0x10
[ 54.044719] ? record_times+0x8b/0xd0
[ 54.044723] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 54.044728] ? kasan_report+0x48/0xf0
[ 54.044734] ? __pfx_load_balance+0x10/0x10
[ 54.044740] ? kasan_report+0x48/0xf0
[ 54.044745] ? sched_clock+0x10/0x30
[ 54.044751] ? sched_clock_cpu+0x67/0x2e0
[ 54.044756] trace_event_buffer_lock_reserve+0x145/0x210
[ 54.044762] trace_event_buffer_reserve+0xe2/0x150
[ 54.044768] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 54.044775] ? strncpy+0x33/0x60
[ 54.044782] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.044786] ? __pfx_trace_save_cmdline+0x10/0x10
[ 54.044793] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.044798] __traceiter_sched_switch+0x59/0x80
[ 54.044806] __schedule+0x72b/0x1580
[ 54.044813] ? __pfx___schedule+0x10/0x10
[ 54.044817] ? do_notify_parent+0x397/0x4c0
[ 54.044827] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 54.044832] ? __rcu_read_unlock+0x50/0x260
[ 54.044836] ? __rcu_read_lock+0x33/0x50
[ 54.044843] do_task_dead+0x5a/0x60
[ 54.044849] do_exit+0xd4b/0x1340
[ 54.044856] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.044861] ? __pfx_do_exit+0x10/0x10
[ 54.044866] ? _raw_spin_lock_irq+0x93/0xf0
[ 54.044872] do_group_exit+0x5c/0xf0
[ 54.044877] get_signal+0xdfa/0xe10
[ 54.044882] ? security_file_permission+0x51/0x2d0
[ 54.044892] ? vfs_write+0x3c1/0x670
[ 54.044898] ? __pfx_get_signal+0x10/0x10
[ 54.044902] ? __pfx_vfs_write+0x10/0x10
[ 54.044907] ? __pfx__raw_spin_lock+0x10/0x10
[ 54.044911] ? expand_files+0x9b/0x330
[ 54.044917] arch_do_signal_or_restart+0x7a/0x350
[ 54.044922] ? __pfx_arch_do_signal_or_restart+0x10/0x10
[ 54.044926] ? __fget_light+0xae/0x1e0
[ 54.044931] ? _raw_spin_lock+0x85/0xe0
[ 54.044936] ? ksys_write+0xd2/0x160
[ 54.044941] ? __pfx_ksys_write+0x10/0x10
[ 54.044946] ? dnotify_flush+0x38/0x220
[ 54.044951] exit_to_user_mode_prepare+0xbe/0x110
[ 54.044957] syscall_exit_to_user_mode+0x2b/0x60
[ 54.044962] do_syscall_64+0x4c/0x90
[ 54.044967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
[ 54.044972] RIP: 0033:0x7fdf1faf7077
[ 54.044975] Code: Unable to access opcode bytes at 0x7fdf1faf704d.
[ 54.044977] RSP: 002b:00007ffee98d8cc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
[ 54.044981] RAX: 0000000000000002 RBX: 000055e92c929540 RCX: 00007fdf1faf7077
[ 54.044984] RDX: 0000000000000002 RSI: 000055e92c929540 RDI: 0000000000000001
[ 54.044986] RBP: 0000000000000002 R08: 0000000000000000 R09: 000055e92c977ae1
[ 54.044988] R10: 000055e92ac8c682 R11: 0000000000000246 R12: 0000000000000001
[ 54.044990] R13: 0000000000000002 R14: 7fffffffffffffff R15: 00007ffee98d8e90
[ 54.044995] </TASK>
[ 54.045079] Modules linked in:
[ 54.045082] CR2: 0000000000000008
[ 54.045797] ---[ end trace 0000000000000000 ]---
[ 54.045798] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 54.045799] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.045803] #PF: supervisor read access in kernel mode
[ 54.045804] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.045806] #PF: error_code(0x0000) - not-present page
[ 54.045808] RSP: 0018:ffffc90000a1f9f8 EFLAGS: 00010082
[ 54.045809] PGD 0
[ 54.045810]
[ 54.045811] P4D 0
[ 54.045812] RAX: 0000000000000000 RBX: 1ffff92000143f48 RCX: ffffffffa3e808f7
[ 54.045815] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.045814] Oops: 0000 [#3] PREEMPT SMP KASAN PTI
[ 54.045817] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.045820] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.045820] CPU: 8 PID: 0 Comm: swapper/8 Tainted: G B D W 6.5.0+ #143
[ 54.045822] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.045825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 54.045828] FS: 0000000000000000(0000) GS:ffff8880b7280000(0000) knlGS:0000000000000000
[ 54.045831] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.045828] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.045834] CR2: 0000000000000008 CR3: 00000000bbc64000 CR4: 00000000000006e0
[ 54.045835] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.045836] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.045838] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.045840] RSP: 0018:ffffc900001f79f8 EFLAGS: 00010082
[ 54.045842] note: ftracetest[393] exited with irqs disabled
[ 54.045843]
[ 54.045845] RAX: 0000000000000000 RBX: 1ffff9200003ef48 RCX: ffffffffa3e808f7
[ 54.045848] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.045850] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.045852] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.045855] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.045860] FS: 0000000000000000(0000) GS:ffff88823bb00000(0000) knlGS:0000000000000000
[ 54.045864] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.045866] CR2: 0000000000000008 CR3: 00000001436ae000 CR4: 00000000000006e0
[ 54.045869] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.045871] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.045873] Call Trace:
[ 54.045875] <TASK>
[ 54.045877] ? __die_body+0x1f/0x70
[ 54.045884] ? page_fault_oops+0x1f5/0x580
[ 54.045899] ? __pfx_page_fault_oops+0x10/0x10
[ 54.045902] ? is_prefetch.isra.0+0x7a/0x260
[ 54.045906] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 54.045910] ? __rcu_read_unlock+0x50/0x260
[ 54.045915] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.045918] ? search_bpf_extables+0xb3/0xd0
[ 54.045925] ? fixup_exception+0x3b/0x4e0
[ 54.045931] ? exc_page_fault+0x59/0xb0
[ 54.045937] ? asm_exc_page_fault+0x26/0x30
[ 54.045944] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.045947] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.045952] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.045956] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.045960] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 54.045965] ? kasan_report+0x48/0xf0
[ 54.045971] ? ring_buffer_unlock_commit+0xfb/0x250
[ 54.045975] ? kasan_report+0x48/0xf0
[ 54.045981] trace_event_buffer_lock_reserve+0x145/0x210
[ 54.045987] trace_event_buffer_reserve+0xe2/0x150
[ 54.045993] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 54.045999] ? ct_nmi_exit+0x82/0xf0
[ 54.046004] ? sched_clock_cpu+0x67/0x2e0
[ 54.046010] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.046017] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.046021] __traceiter_sched_switch+0x59/0x80
[ 54.046028] __schedule+0x72b/0x1580
[ 54.046033] ? _raw_spin_unlock_irqrestore+0x16/0x50
[ 54.046039] ? __pfx___schedule+0x10/0x10
[ 54.046043] ? ct_nmi_exit+0xd8/0xf0
[ 54.046049] ? irqentry_exit+0x3b/0x50
[ 54.046054] ? rcu_preempt_deferred_qs+0x22/0x90
[ 54.046059] ? ct_kernel_exit.constprop.0+0xa0/0xc0
[ 54.046065] schedule_idle+0x33/0x50
[ 54.046070] do_idle+0x1f3/0x2f0
[ 54.046075] ? __pfx_do_idle+0x10/0x10
[ 54.046078] ? finish_task_switch+0x99/0x370
[ 54.046084] ? schedule_idle+0x3b/0x50
[ 54.046089] cpu_startup_entry+0x1d/0x20
[ 54.046093] start_secondary+0x1a8/0x1d0
[ 54.046099] ? __pfx_start_secondary+0x10/0x10
[ 54.046104] secondary_startup_64_no_verify+0x178/0x17b
[ 54.046113] </TASK>
[ 54.046114] Modules linked in:
[ 54.046117] CR2: 0000000000000008
[ 54.046855] ---[ end trace 0000000000000000 ]---
[ 54.046856] BUG: kernel NULL pointer dereference, address: 0000000000000008
[ 54.046858] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.046861] #PF: supervisor read access in kernel mode
[ 54.046863] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.046865] #PF: error_code(0x0000) - not-present page
[ 54.046868] RSP: 0018:ffffc90000a1f9f8 EFLAGS: 00010082
[ 54.046869] PGD 0
[ 54.046871] P4D 0
[ 54.046873] RAX: 0000000000000000 RBX: 1ffff92000143f48 RCX: ffffffffa3e808f7
[ 54.046874]
[ 54.046877] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.046877] Oops: 0000 [#4] PREEMPT SMP KASAN PTI
[ 54.046880] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.046884] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.046883] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G B D W 6.5.0+ #143
[ 54.046887] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.046888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
[ 54.046892] FS: 0000000000000000(0000) GS:ffff88823bb00000(0000) knlGS:0000000000000000
[ 54.046891] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.046897] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.046900] CR2: 0000000000000008 CR3: 00000001436ae000 CR4: 00000000000006e0
[ 54.046899] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.046904] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.046906] RSP: 0018:ffffc900001a79f8 EFLAGS: 00010082
[ 54.046907] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.046911]
[ 54.046913] RAX: 0000000000000000 RBX: 1ffff92000034f48 RCX: ffffffffa3e808f7
[ 54.046916] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.046918] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.046921] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.046924] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.046930] FS: 0000000000000000(0000) GS:ffff8880b7180000(0000) knlGS:0000000000000000
[ 54.046934] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.046937] CR2: 0000000000000008 CR3: 00000000bbc64000 CR4: 00000000000006e0
[ 54.046940] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.046942] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 54.046944] Call Trace:
[ 54.046946] <TASK>
[ 54.046948] ? __die_body+0x1f/0x70
[ 54.046954] ? page_fault_oops+0x1f5/0x580
[ 54.046959] ? __pfx_page_fault_oops+0x10/0x10
[ 54.046962] ? is_prefetch.isra.0+0x7a/0x260
[ 54.046966] ? __pfx_is_prefetch.isra.0+0x10/0x10
[ 54.046970] ? __rcu_read_unlock+0x50/0x260
[ 54.046974] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.046978] ? search_bpf_extables+0xb3/0xd0
[ 54.046984] ? fixup_exception+0x3b/0x4e0
[ 54.046989] ? exc_page_fault+0x59/0xb0
[ 54.046995] ? asm_exc_page_fault+0x26/0x30
[ 54.047002] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.047005] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.047009] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.047013] ? ring_buffer_lock_reserve+0x97/0x790
[ 54.047017] ? start_secondary+0x1a8/0x1d0
[ 54.047022] ? __pfx_ring_buffer_lock_reserve+0x10/0x10
[ 54.047026] ? kasan_report+0x48/0xf0
[ 54.047032] ? ring_buffer_unlock_commit+0xfb/0x250
[ 54.047036] ? kasan_report+0x48/0xf0
[ 54.047042] trace_event_buffer_lock_reserve+0x145/0x210
[ 54.047048] trace_event_buffer_reserve+0xe2/0x150
[ 54.047054] trace_event_raw_event_sched_switch+0xb3/0x2d0
[ 54.047060] ? sched_clock_cpu+0x67/0x2e0
[ 54.047065] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.047072] ? __pfx_trace_event_raw_event_sched_switch+0x10/0x10
[ 54.047076] __traceiter_sched_switch+0x59/0x80
[ 54.047082] __schedule+0x72b/0x1580
[ 54.047087] ? _raw_spin_unlock_irqrestore+0x16/0x50
[ 54.047093] ? __pfx___schedule+0x10/0x10
[ 54.047098] ? ct_nmi_exit+0xd8/0xf0
[ 54.047103] ? irqentry_exit+0x3b/0x50
[ 54.047109] ? rcu_preempt_deferred_qs+0x22/0x90
[ 54.047113] ? ct_kernel_exit.constprop.0+0xa0/0xc0
[ 54.047120] schedule_idle+0x33/0x50
[ 54.047124] do_idle+0x1f3/0x2f0
[ 54.047128] ? __pfx__raw_spin_lock_irqsave+0x10/0x10
[ 54.047133] ? __pfx_do_idle+0x10/0x10
[ 54.047137] ? swake_up_locked.part.0+0x79/0x90
[ 54.047143] cpu_startup_entry+0x1d/0x20
[ 54.047148] start_secondary+0x1a8/0x1d0
[ 54.047152] ? __pfx_start_secondary+0x10/0x10
[ 54.047158] secondary_startup_64_no_verify+0x178/0x17b
[ 54.047166] </TASK>
[ 54.047167] Modules linked in:
[ 54.047170] CR2: 0000000000000008
[ 54.047874] ---[ end trace 0000000000000000 ]---
[ 54.047876] RIP: 0010:ring_buffer_lock_reserve+0x97/0x790
[ 54.047880] Code: 48 89 84 24 e0 00 00 00 31 c0 65 ff 05 2a 86 1b 5c 48 8d 6f 08 be 04 00 00 00 48 89 ef e8 41 1e 23 00 48 89 ef e8 e9 09 23 00 <45> 8b 74 24 08 45 85 f6 0f 85 a0 02 00 1
[ 54.047884] RSP: 0018:ffffc90000a1f9f8 EFLAGS: 00010082
[ 54.047887] RAX: 0000000000000000 RBX: 1ffff92000143f48 RCX: ffffffffa3e808f7
[ 54.047890] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000008
[ 54.047892] RBP: 0000000000000008 R08: ffffffffa3e808f7 R09: fffffbfff4d62d33
[ 54.047894] R10: fffffbfff4d62d32 R11: ffffffffa6b16997 R12: 0000000000000000
[ 54.047896] R13: 0000000000000040 R14: 0000000000000040 R15: 0000000000000000
[ 54.047901] FS: 0000000000000000(0000) GS:ffff8880b7180000(0000) knlGS:0000000000000000
[ 54.047904] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 54.047907] CR2: 0000000000000008 CR3: 00000000bbc64000 CR4: 00000000000006e0
[ 54.047909] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 54.047911] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 55.094835] Shutting down cpus with NMI
[ 55.395334] Kernel Offset: 0x22c00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
[ 55.397167] ---[ end Kernel panic - not syncing: Attempted to kill the idle task! ]---
