early console in setup code
Linux version 6.14.0-11173-g731bdd97466a (kbuild@29d769556755) (clang version 20.1.2 (git://gitmirror/llvm_project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247), LLD 20.1.2 (git://gitmirror/llvm_project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)) #1 PREEMPT_DYNAMIC Wed Jun 11 15:52:57 CST 2025
------------[ cut here ]------------
UBSAN: negation-overflow in lib/sort.c:222:36
negation of 12 cannot be represented in type 'size_t' (aka 'unsigned int'):
CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.14.0-11173-g731bdd97466a #1 PREEMPT(undef)  00fbd346f9ecab0633cc52854fbaacf90c8417e1
Call Trace:
__dump_stack+0x18/0x20
dump_stack_lvl+0x37/0x70
dump_stack+0xd/0x17
ubsan_epilogue+0x8/0x40
__ubsan_handle_negate_overflow+0xad/0xb0
sort_r+0x468/0x4b0
sort+0x29/0x50
? jump_label_swap+0x40/0x40
? jump_label_text_reserved+0x1f0/0x1f0
jump_label_init+0x5e/0xf0
? jump_label_swap+0x40/0x40
? jump_label_text_reserved+0x1f0/0x1f0
setup_arch+0xa5/0x3d0
? _printk+0x1f/0x40
start_kernel+0x6a/0x490
i386_start_kernel+0xce/0xf0
startup_32_smp+0x151/0x160
---[ end trace ]---
BIOS-provided physical RAM map:
BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable
BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved
BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved
BIOS-e820: [mem 0x0000000000100000-0x00000000bffdffff] usable
BIOS-e820: [mem 0x00000000bffe0000-0x00000000bfffffff] reserved
BIOS-e820: [mem 0x00000000feffc000-0x00000000feffffff] reserved
BIOS-e820: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
BIOS-e820: [mem 0x0000000100000000-0x000000013fffffff] usable
e820: remove [mem 0x100000000-0xfffffffffffffffe] usable
printk: debug: ignoring loglevel setting.
printk: legacy bootconsole [earlyser0] enabled
Notice: NX (Execute Disable) protection cannot be enabled: non-PAE kernel!
user-defined physical RAM map:
user: [mem 0x0000000000000000-0x000000000009fbff] usable
user: [mem 0x000000000009fc00-0x000000000009ffff] reserved
user: [mem 0x00000000000f0000-0x00000000000fffff] reserved
user: [mem 0x0000000000100000-0x00000000bffdffff] usable
user: [mem 0x00000000bffe0000-0x00000000bfffffff] reserved
user: [mem 0x00000000feffc000-0x00000000feffffff] reserved
user: [mem 0x00000000fffc0000-0x00000000ffffffff] reserved
SMBIOS 2.8 present.
DMI: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
DMI: Memory slots populated: 1/1
Hypervisor detected: KVM
kvm-clock: Using msrs 4b564d01 and 4b564d00
kvm-clock: using sched offset of 883177957 cycles
clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
tsc: Detected 2095.076 MHz processor
e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
e820: remove [mem 0x000a0000-0x000fffff] usable
last_pfn = 0xbffe0 max_arch_pfn = 0x100000
MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT  
initial memory mapped: [mem 0x00000000-0x1bffffff]
RAMDISK: [mem 0x6c32c000-0x7fffffff]
Allocated new RAMDISK: [mem 0x58658000-0x6c32be99]
Move RAMDISK from [mem 0x6c32c000-0x7ffffe99] to [mem 0x58658000-0x6c32be99]
ACPI: Early table checksum verification disabled
ACPI: RSDP 0x00000000000F59B0 000014 (v00 BOCHS )
ACPI: RSDT 0x00000000BFFE1B56 000034 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: FACP 0x00000000BFFE1A02 000074 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: DSDT 0x00000000BFFE0040 0019C2 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: FACS 0x00000000BFFE0000 000040
ACPI: APIC 0x00000000BFFE1A76 000080 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: HPET 0x00000000BFFE1AF6 000038 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: WAET 0x00000000BFFE1B2E 000028 (v01 BOCHS  BXPC     00000001 BXPC 00000001)
ACPI: Reserving FACP table memory at [mem 0xbffe1a02-0xbffe1a75]
ACPI: Reserving DSDT table memory at [mem 0xbffe0040-0xbffe1a01]
ACPI: Reserving FACS table memory at [mem 0xbffe0000-0xbffe003f]
ACPI: Reserving APIC table memory at [mem 0xbffe1a76-0xbffe1af5]
ACPI: Reserving HPET table memory at [mem 0xbffe1af6-0xbffe1b2d]
ACPI: Reserving WAET table memory at [mem 0xbffe1b2e-0xbffe1b55]
1299MB HIGHMEM available.
1771MB LOWMEM available.
mapped low ram: 0 - 6ebfe000
low ram: 0 - 6ebfe000
Zone ranges:
DMA      [mem 0x0000000000001000-0x0000000000ffffff]
Normal   [mem 0x0000000001000000-0x000000006ebfdfff]
HighMem  [mem 0x000000006ebfe000-0x00000000bffdffff]
Movable zone start for each node
Early memory node ranges
node   0: [mem 0x0000000000001000-0x000000000009efff]
node   0: [mem 0x0000000000100000-0x00000000bffdffff]
Initmem setup node 0 [mem 0x0000000000001000-0x00000000bffdffff]
On node 0, zone DMA: 1 pages in unavailable ranges
On node 0, zone DMA: 97 pages in unavailable ranges
On node 0, zone HighMem: 32 pages in unavailable ranges
ACPI: PM-Timer IO Port: 0x608
ACPI: HPET id: 0x8086a201 base: 0xfed00000
[mem 0xc0000000-0xfeffbfff] available for PCI devices
Booting paravirtualized kernel on KVM
clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1910969940391419 ns
pcpu-alloc: s0 r0 d131072 u131072 alloc=1*131072
pcpu-alloc: [0] 0 
Kernel command line: ip=::::vm-meta-50::dhcp root=/dev/ram0 RESULT_ROOT=/result/locktorture/300s-cpuhotplug/vm-snb-i386/debian-11.1-i386-20220923.cgz/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/0 BOOT_IMAGE=/pkg/linux/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/vmlinuz-6.14.0-11173-g731bdd97466a branch=linux-next/master job=/lkp/jobs/scheduled/vm-meta-50/locktorture-300s-cpuhotplug-debian-11.1-i386-20220923.cgz-i386-randconfig-017-20250610-731bdd97466a-20250612-86095-xm4bsi-0.yaml user=lkp ARCH=i386 kconfig=i386-randconfig-017-20250610 commit=731bdd97466a280d6bdd8eceeb13d9fab6f26cbd mem=4G intremap=posted_msi vmalloc=256M initramfs_async=0 page_owner=on carrier_timeout=60 rcupdate.rcu_self_test=0 max_uptime=1200 LKP_SERVER=internal-lkp-server selinux=0 debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100 net.ifnames=0 printk.devkmsg=on panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ram
sysrq: sysrq always enabled.
ignoring the deprecated load_ramdisk= option
Unknown kernel command line parameters "RESULT_ROOT=/result/locktorture/300s-cpuhotplug/vm-snb-i386/debian-11.1-i386-20220923.cgz/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/0 BOOT_IMAGE=/pkg/linux/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/vmlinuz-6.14.0-11173-g731bdd97466a branch=linux-next/master job=/lkp/jobs/scheduled/vm-meta-50/locktorture-300s-cpuhotplug-debian-11.1-i386-20220923.cgz-i386-randconfig-017-20250610-731bdd97466a-20250612-86095-xm4bsi-0.yaml user=lkp ARCH=i386 kconfig=i386-randconfig-017-20250610 commit=731bdd97466a280d6bdd8eceeb13d9fab6f26cbd intremap=posted_msi max_uptime=1200 LKP_SERVER=internal-lkp-server selinux=0 apic=debug nmi_watchdog=panic prompt_ramdisk=0 vga=normal audit=0 ia32_emulation=on riscv_isa_fallback=1", will be passed to user space.
printk: log buffer data + meta data: 1048576 + 3276800 = 4325376 bytes
Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes, linear)
Inode-cache hash table entries: 131072 (order: 7, 524288 bytes, linear)
Built 1 zonelists, mobility grouping on.  Total pages: 786302
mem auto-init: stack:all(zero), heap alloc:off, heap free:on
mem auto-init: clearing system memory may take some time...
stackdepot: allocating hash table via alloc_large_system_hash
stackdepot hash table entries: 131072 (order: 8, 1048576 bytes, linear)
Initializing HighMem for node 0 (0006ebfe:000bffe0)
Initializing Movable for node 0 (00000000:00000000)
Checking if this processor honours the WP bit even in supervisor mode...Ok.
SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
allocated 53477376 bytes of page_ext
Node 0, zone      DMA: page owner found early allocated 0 pages
Node 0, zone   Normal: page owner found early allocated 13079 pages
Node 0, zone  HighMem: page owner found early allocated 0 pages
Poking KASLR using RDTSC...

**********************************************************
**   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
**                                                      **
** trace_printk() being used. Allocating extra memory.  **
**                                                      **
** This means that this is a DEBUG kernel and it is     **
** unsafe for production use.                           **
**                                                      **
** If you see this message and you are not debugging    **
** the kernel, report this immediately to your vendor!  **
**                                                      **
**   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
**********************************************************
Dynamic Preempt: voluntary
Running RCU self tests
Running RCU synchronous self tests
rcu: Preemptible hierarchical RCU implementation.
rcu: 	RCU event tracing is enabled.
rcu: 	RCU lockdep checking is enabled.
	RCU CPU stall warnings timeout set to 100 (rcu_cpu_stall_timeout).
	Trampoline variant of Tasks RCU enabled.
	Rude variant of Tasks RCU enabled.
	Tracing variant of Tasks RCU enabled.
rcu: RCU calculated value of scheduler-enlistment delay is 100 jiffies.
Running RCU synchronous self tests
RCU Tasks: Setting shift to 0 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=1.
RCU Tasks Rude: Setting shift to 0 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=1.
RCU Tasks Trace: Setting shift to 0 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=1.
NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
rcu: srcu_init: Setting srcu_struct sizes based on contention.
Console: colour VGA+ 80x25
printk: legacy console [tty0] enabled
printk: legacy console [ttyS0] enabled
printk: legacy bootconsole [earlyser0] disabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:  8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        8192
... CLASSHASH_SIZE:          4096
... MAX_LOCKDEP_ENTRIES:     32768
... MAX_LOCKDEP_CHAINS:      65536
... CHAINHASH_SIZE:          32768
memory used by lock dependency info: 3869 kB
memory used for stack traces: 2112 kB
per task-struct memory footprint: 1344 bytes
ACPI: Core revision 20240827
ACPI: setting ELCR to 0200 (from 0c00)
clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns
clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1e33052aadd, max_idle_ns: 440795310221 ns
Calibrating delay loop (skipped) preset value.. 4190.15 BogoMIPS (lpj=2095076)
Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0
Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0
CPU: Intel Xeon E312xx (Sandy Bridge) (family: 0x6, model: 0x2a, stepping: 0x1)
Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
Speculative Store Bypass: Vulnerable
L1TF: Kernel not compiled for PAE. No mitigation for L1TF
MDS: Vulnerable
MMIO Stale Data: Unknown: No mitigations
x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
pid_max: default: 32768 minimum: 301
LSM: initializing lsm=capability,landlock,yama,loadpin,safesetid
landlock: Up and running.
Yama: becoming mindful.
LoadPin: ready to pin (currently not enforcing)
Mount-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
Mountpoint-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
BUG: kernel NULL pointer dereference, address: 00000018
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
*pde = 00000000 
Oops: Oops: 0002 [#1]
CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 6.14.0-11173-g731bdd97466a #1 PREEMPT(voluntary)  00fbd346f9ecab0633cc52854fbaacf90c8417e1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
EIP: lockdep_init_map_type+0x11/0x2b0
Code: 00 00 00 5e 5d 2e e9 4e bf 3f 01 89 f0 e8 a7 43 f1 ff eb e5 90 90 90 90 90 55 89 e5 57 56 83 ec 08 8b 35 14 20 b8 9a 89 75 f4 <c7> 40 08 00 00 00 00 c7 40 04 00 00 00 00 8b 35 90 dd 90 9b 89 d7
EAX: 00000010 EBX: 9a8f2e13 ECX: 9ba10c30 EDX: 9a8f2e13
ESI: f894bc3e EDI: 9ba10c30 EBP: 9ab77efc ESP: 9ab77eec
DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210292
CR0: 80050033 CR2: 00000018 CR3: 1b321000 CR4: 000406d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: fffe0ff0 DR7: 00000400
Call Trace:
__raw_spin_lock_init+0x37/0x70
ss_rstat_init+0x4b/0x60
cgroup_init_subsys+0x11a/0x330
cgroup_init+0x43c/0x6a0
start_kernel+0x461/0x490
i386_start_kernel+0xce/0xf0
startup_32_smp+0x151/0x160
Modules linked in:
CR2: 0000000000000018
---[ end trace 0000000000000000 ]---
EIP: lockdep_init_map_type+0x11/0x2b0
Code: 00 00 00 5e 5d 2e e9 4e bf 3f 01 89 f0 e8 a7 43 f1 ff eb e5 90 90 90 90 90 55 89 e5 57 56 83 ec 08 8b 35 14 20 b8 9a 89 75 f4 <c7> 40 08 00 00 00 00 c7 40 04 00 00 00 00 8b 35 90 dd 90 9b 89 d7
EAX: 00000010 EBX: 9a8f2e13 ECX: 9ba10c30 EDX: 9a8f2e13
ESI: f894bc3e EDI: 9ba10c30 EBP: 9ab77efc ESP: 9ab77eec
DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210292
CR0: 80050033 CR2: 00000018 CR3: 1b321000 CR4: 000406d0
DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
DR6: fffe0ff0 DR7: 00000400
Kernel panic - not syncing: Fatal exception

Kboot worker: lkp-worker66
Elapsed time: 60

kvm=(
	qemu-system-i386
	-enable-kvm
	-cpu SandyBridge
	-kernel $kernel
	-initrd initrd-vm-meta-50.cgz
	-m 4096
	-smp 2
	-device e1000,netdev=net0
	-netdev user,id=net0,hostfwd=tcp::32032-:22
	-boot order=nc
	-no-reboot
	-device i6300esb
	-device pci-testdev
	-watchdog-action debug
	-rtc base=localtime
	-serial stdio
	-display none
	-monitor null
)

append=(
	ip=::::vm-meta-50::dhcp
	root=/dev/ram0
	RESULT_ROOT=/result/locktorture/300s-cpuhotplug/vm-snb-i386/debian-11.1-i386-20220923.cgz/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/0
	BOOT_IMAGE=/pkg/linux/i386-randconfig-017-20250610/clang-20/731bdd97466a280d6bdd8eceeb13d9fab6f26cbd/vmlinuz-6.14.0-11173-g731bdd97466a
	branch=linux-next/master
	job=/job-script
	user=lkp
	ARCH=i386
	kconfig=i386-randconfig-017-20250610
	commit=731bdd97466a280d6bdd8eceeb13d9fab6f26cbd
	mem=4G
	intremap=posted_msi
	vmalloc=256M
	initramfs_async=0
	page_owner=on
	carrier_timeout=60
	rcupdate.rcu_self_test=0
	max_uptime=1200
	result_service=tmpfs
	selinux=0
	debug
	apic=debug
	sysrq_always_enabled
	rcupdate.rcu_cpu_stall_timeout=100
	net.ifnames=0
	printk.devkmsg=on
	panic=-1
	softlockup_panic=1
	nmi_watchdog=panic
	oops=panic
	load_ramdisk=2
	prompt_ramdisk=0
	drbd.minor_count=8
	systemd.log_level=err
	ignore_loglevel
	console=tty0
	earlyprintk=ttyS0,115200
	console=ttyS0,115200
	vga=normal
	rw
	rcuperf.shutdown=0
	rcuscale.shutdown=0
	refscale.shutdown=0
	watchdog_thresh=240
	audit=0
	kunit.enable=0
	ia32_emulation=on
	riscv_isa_fallback=1
)

"${kvm[@]}" -append "${append[*]}"