CPU topo: Max. threads per core: 2
CPU topo: Num. cores per package: 1
CPU topo: Num. threads per package: 2
CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[mem 0xc0000000-0xfffbbfff] available for PCI devices
Booting paravirtualized kernel on KVM
clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
percpu: Embedded 70 pages/cpu s245960 r8192 d32568 u1048576
kvm-guest: PV spinlocks enabled
PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
Kernel command line: earlyprintk=serial net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 ima_policy=tcb nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 binder.debug_mask=0 rcupdate.rcu_expedited=1 rcupdate.rcu_cpu_stall_cputime=1 no_hash_pointers page_owner=on sysctl.vm.nr_hugepages=4 sysctl.vm.nr_overcommit_hugepages=4 secretmem.enable=1 sysctl.max_rcu_stall_to_panic=1 msr.allow_writes=off coredump_filter=0xffff root=/dev/sda console=ttyS0 vsyscall=native numa=fake=2 kvm-intel.nested=1 spec_store_bypass_disable=prctl nopcid vivid.n_devs=64 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=32 rose.rose_ndevs=32 smp.csd_lock_timeout=100000 watchdog_thresh=55 workqueue.watchdog_thresh=140 sysctl.net.core.netdev_unregister_timeout_secs=140 dummy_hcd.num=32 max_loop=32 nbds_max=32 panic_on_warn
Unknown kernel command line parameters "spec_store_bypass_disable=prctl nbds_max=32 BOOT_IMAGE=/boot/bzImage", will be passed to user space.
random: crng init done
printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
software IO TLB: area num 2.
Fallback order for Node 0: 0 1
Fallback order for Node 1: 1 0
Built 2 zonelists, mobility grouping on. Total pages: 2097051
Policy zone: Normal
mem auto-init: stack:all(zero), heap alloc:on, heap free:off
stackdepot: allocating hash table via alloc_large_system_hash
stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
allocated 167772160 bytes of page_ext
Node 0, zone DMA: page owner found early allocated 0 pages
Node 0, zone DMA32: page owner found early allocated 21222 pages
Node 0, zone Normal: page owner found early allocated 0 pages
Node 1, zone Normal: page owner found early allocated 19843 pages
Kernel/User page tables isolation: enabled
Dynamic Preempt: full
Running RCU self tests
Running RCU synchronous self tests
rcu: Preemptible hierarchical RCU implementation.
rcu: RCU lockdep checking is enabled.
rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
rcu: RCU callback double-/use-after-free debug is enabled.
rcu: RCU debug extended QS entry/exit.
All grace periods are expedited (rcu_expedited).
Trampoline variant of Tasks RCU enabled.
Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
Running RCU synchronous self tests
RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
RCU Tasks Trace: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 0 at kernel/trace/trace_events.c:596 test_event_printk kernel/trace/trace_events.c:596 [inline]
WARNING: CPU: 0 PID: 0 at kernel/trace/trace_events.c:596 trace_event_raw_init+0xbda/0x1170 kernel/trace/trace_events.c:616
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.15.0-rc3-next-20250422-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:test_event_printk kernel/trace/trace_events.c:596 [inline]
RIP: 0010:trace_event_raw_init+0xbda/0x1170 kernel/trace/trace_events.c:616
Code: 89 d8 48 83 c4 48 5b 41 5c 41 5d 41 5e 41 5f 5d e9 1b 1e 64 0a 80 3d 0e 26 7e 0e 01 0f 85 7e 03 00 00 e8 79 50 f7 ff eb d5 90 <0f> 0b 90 4c 89 f6 48 83 e6 01 31 ff e8 45 55 f7 ff 4c 89 f3 49 83
RSP: 0000:ffffffff8ea07e30 EFLAGS: 00010002
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8ea965c0
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000000
RBP: 0000000000000020 R08: ffffffff81cbc889 R09: ffffffff8ebf6886
R10: ffffffff8ebf6886 R11: ffffffff8ebf6886 R12: 0000000000000005
R13: ffffffff8ebf67e0 R14: 0000000000000020 R15: 0000000000000028
FS: 0000000000000000(0000) GS:ffff888124f9f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000eb38000 CR4: 00000000000000b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
event_init kernel/trace/trace_events.c:3111 [inline]
event_trace_enable+0x1f3/0x3a0 kernel/trace/trace_events.c:4455
trace_event_init+0x13/0x20 kernel/trace/trace_events.c:4548
trace_init+0xf/0x40 kernel/trace/trace.c:11070
start_kernel+0x206/0x510 init/main.c:994
x86_64_start_reservations+0x2a/0x30 arch/x86/kernel/head64.c:304
x86_64_start_kernel+0x66/0x70 arch/x86/kernel/head64.c:285
common_startup_64+0x13e/0x147
</TASK>