smpboot: Booting Node 0 Processor 1 APIC 0x1
------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.17/6018 is trying to acquire lock:
ffffffff8e2d6ac0 (console_owner){....}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1900
but task is already holding lock:
ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:647 [inline]
ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:632
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:639
raw_spin_rq_lock kernel/sched/sched.h:1558 [inline]
task_rq_lock+0xcf/0x490 kernel/sched/core.c:739
cgroup_move_task+0x81/0x2a0 kernel/sched/psi.c:1170
css_set_move_task+0x288/0x5f0 kernel/cgroup/cgroup.c:951
cgroup_post_fork+0x201/0x9e0 kernel/cgroup/cgroup.c:6913
copy_process+0x56b6/0x7430 kernel/fork.c:2465
kernel_clone+0xfc/0x910 kernel/fork.c:2651
user_mode_thread+0xc8/0x110 kernel/fork.c:2727
rest_init+0x23/0x2b0 init/main.c:722
start_kernel+0x3ef/0x4d0 init/main.c:1206
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #3 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:557 [inline]
try_to_wake_up+0xb7/0x1860 kernel/sched/core.c:4106
__wake_up_common+0x135/0x1f0 kernel/sched/wait.c:108
__wake_up_common_lock kernel/sched/wait.c:125 [inline]
__wake_up+0x31/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x4d/0x60 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0x9e/0x270 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0xf8/0x1d0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x236/0x890 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
handle_irq arch/x86/kernel/irq.c:255 [inline]
call_irq_handler arch/x86/kernel/irq.c:311 [inline]
__common_interrupt+0xd0/0x2f0 arch/x86/kernel/irq.c:326
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
rcu_is_watching+0xd/0xc0 kernel/rcu/tree.c:750
rcu_read_lock include/linux/rcupdate.h:868 [inline]
class_rcu_constructor include/linux/rcupdate.h:1195 [inline]
unwind_next_frame+0xa86/0x20b0 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:56
kasan_save_track+0x14/0x30 mm/kasan/common.c:77
poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
__kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:414
kasan_kmalloc include/linux/kasan.h:262 [inline]
__do_kmalloc_node mm/slub.c:5657 [inline]
__kmalloc_node_track_caller_noprof+0x353/0x930 mm/slub.c:5764
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:608
__alloc_skb+0x186/0x410 net/core/skbuff.c:690
alloc_skb include/linux/skbuff.h:1383 [inline]
alloc_skb_with_frags+0xe0/0x860 net/core/skbuff.c:6712
sock_alloc_send_pskb+0x7f9/0x980 net/core/sock.c:2995
unix_dgram_sendmsg+0x3bc/0x1830 net/unix/af_unix.c:2130
unix_seqpacket_sendmsg+0x12a/0x1c0 net/unix/af_unix.c:2531
sock_sendmsg_nosec net/socket.c:727 [inline]
__sock_sendmsg net/socket.c:742 [inline]
sock_write_iter+0x566/0x610 net/socket.c:1195
do_iter_readv_writev+0x662/0x9e0 fs/read_write.c:827
vfs_writev+0x35f/0xde0 fs/read_write.c:1057
do_writev+0x28c/0x340 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&tty->write_wait){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock kernel/sched/wait.c:124 [inline]
__wake_up+0x1c/0x60 kernel/sched/wait.c:146
tty_port_default_wakeup+0x4d/0x60 drivers/tty/tty_port.c:67
serial8250_tx_chars+0x68e/0x860 drivers/tty/serial/8250/8250_port.c:1719
serial8250_handle_irq+0x761/0xcb0 drivers/tty/serial/8250/8250_port.c:1827
serial8250_default_handle_irq+0x9e/0x270 drivers/tty/serial/8250/8250_port.c:1846
serial8250_interrupt+0xf8/0x1d0 drivers/tty/serial/8250/8250_core.c:86
__handle_irq_event_percpu+0x236/0x890 kernel/irq/handle.c:211
handle_irq_event_percpu kernel/irq/handle.c:248 [inline]
handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:265
handle_edge_irq+0x3ca/0x9e0 kernel/irq/chip.c:855
generic_handle_irq_desc include/linux/irqdesc.h:172 [inline]
handle_irq arch/x86/kernel/irq.c:255 [inline]
call_irq_handler arch/x86/kernel/irq.c:311 [inline]
__common_interrupt+0xd0/0x2f0 arch/x86/kernel/irq.c:326
common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:319
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
native_safe_halt arch/x86/include/asm/irqflags.h:48 [inline]
pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:81
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x6c/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:191 [inline]
do_idle+0x38d/0x510 kernel/sched/idle.c:332
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:430
rest_init+0x16b/0x2b0 init/main.c:757
start_kernel+0x3ef/0x4d0 init/main.c:1206
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #1 (&port_lock_key){-.-.}-{3:3}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:717 [inline]
serial8250_console_write+0x181/0x1890 drivers/tty/serial/8250/8250_port.c:3301
console_emit_next_record kernel/printk/printk.c:3129 [inline]
console_flush_one_record+0x796/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
register_console+0x823/0x1210 kernel/printk/printk.c:4170
univ8250_console_init+0x5f/0x90 drivers/tty/serial/8250/8250_core.c:515
console_init+0x152/0x600 kernel/printk/printk.c:4369
start_kernel+0x298/0x4d0 init/main.c:1143
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x130/0x190 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x148
-> #0 (console_owner){....}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1900
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record+0x73f/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
__report_bug+0x3a6/0x520 lib/bug.c:243
report_bug+0xb2/0x220 lib/bug.c:281
handle_bug+0x127/0x260 arch/x86/kernel/traps.c:435
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:489
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
lockdep_assert_rq_held kernel/sched/sched.h:1549 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1547 [inline]
update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
pick_next_task kernel/sched/core.c:6088 [inline]
__schedule+0x212d/0x6150 kernel/sched/core.c:6805
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
smpboot_restore_warm_reset_vector arch/x86/kernel/smpboot.c:165 [inline]
arch_cpuhp_cleanup_kick_cpu arch/x86/kernel/smpboot.c:1023 [inline]
arch_cpuhp_cleanup_kick_cpu+0xbb/0x170 arch/x86/kernel/smpboot.c:1019
cpuhp_bp_sync_alive kernel/cpu.c:450 [inline]
cpuhp_bringup_ap+0x95/0x1100 kernel/cpu.c:839
cpuhp_invoke_callback+0x3d5/0xa10 kernel/cpu.c:195
__cpuhp_invoke_callback_range+0x101/0x210 kernel/cpu.c:968
cpuhp_invoke_callback_range kernel/cpu.c:992 [inline]
cpuhp_up_callbacks kernel/cpu.c:1023 [inline]
_cpu_up+0x3f5/0x960 kernel/cpu.c:1685
cpu_up+0x1bf/0x240 kernel/cpu.c:1717
cpu_subsys_online+0x84/0x190 drivers/base/cpu.c:61
device_online+0x114/0x1c0 drivers/base/core.c:4225
online_store+0x145/0x180 drivers/base/core.c:2809
dev_attr_store+0x58/0x80 drivers/base/core.c:2437
sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352
do_iter_readv_writev+0x662/0x9e0 fs/read_write.c:827
vfs_writev+0x35f/0xde0 fs/read_write.c:1057
do_writev+0x132/0x340 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
console_owner --> &p->pi_lock --> &rq->__lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&rq->__lock);
lock(&p->pi_lock);
lock(&rq->__lock);
lock(console_owner);
*** DEADLOCK ***
11 locks held by syz.0.17/6018:
#0: ffff8880349f6420 (sb_writers#7){.+.+}-{0:0}, at: do_writev+0x132/0x340 fs/read_write.c:1103
#1: ffff888033687488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x28f/0x570 fs/kernfs/file.c:343
#2: ffff888141eccc38 (kn->active#60){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff888141eccc38 (kn->active#60){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2ff/0x570 fs/kernfs/file.c:344
#3: ffffffff8f2b9d88 (device_hotplug_lock){+.+.}-{4:4}, at: lock_device_hotplug_sysfs drivers/base/core.c:2355 [inline]
#3: ffffffff8f2b9d88 (device_hotplug_lock){+.+.}-{4:4}, at: online_store+0x9a/0x180 drivers/base/core.c:2805
#4: ffff8880b8537490 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:895 [inline]
#4: ffff8880b8537490 (&dev->mutex){....}-{4:4}, at: device_online+0x27/0x1c0 drivers/base/core.c:4222
#5: ffffffff8e269f48 (cpu_add_remove_lock){+.+.}-{4:4}, at: cpu_maps_update_begin kernel/cpu.c:469 [inline]
#5: ffffffff8e269f48 (cpu_add_remove_lock){+.+.}-{4:4}, at: cpu_up+0xbc/0x240 kernel/cpu.c:1706
#6: ffffffff8e269e90 (cpu_hotplug_lock){++++}-{0:0}, at: cpus_write_lock kernel/cpu.c:509 [inline]
#6: ffffffff8e269e90 (cpu_hotplug_lock){++++}-{0:0}, at: _cpu_up+0x68/0x960 kernel/cpu.c:1633
#7: ffffffff8e3bd868 (sparse_irq_lock){+.+.}-{4:4}, at: cpuhp_bringup_ap+0x63/0x1100 kernel/cpu.c:837
#8: ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:647 [inline]
#8: ffff8880b843add8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:632
#9: ffffffff8e3b6f00 (console_lock){+.+.}-{0:0}, at: _printk+0xc7/0x100 kernel/printk/printk.c:2451
#10: ffffffff8e3b6f78 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:336 [inline]
#10: ffffffff8e3b6f78 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:409 [inline]
#10: ffffffff8e3b6f78 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:289 [inline]
#10: ffffffff8e3b6f78 (console_srcu){....}-{0:0}, at: console_flush_one_record+0x103/0xc60 kernel/printk/printk.c:3192
stack backtrace:
CPU: 0 UID: 0 PID: 6018 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_circular_bug+0x275/0x340 kernel/locking/lockdep.c:2043
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x1669/0x2890 kernel/locking/lockdep.c:5237
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x179/0x330 kernel/locking/lockdep.c:5825
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1900
console_emit_next_record kernel/printk/printk.c:3123 [inline]
console_flush_one_record+0x73f/0xc60 kernel/printk/printk.c:3215
console_flush_all kernel/printk/printk.c:3289 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3319 [inline]
console_unlock+0xef/0x240 kernel/printk/printk.c:3359
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2426
_printk+0xc7/0x100 kernel/printk/printk.c:2451
__report_bug+0x3a6/0x520 lib/bug.c:243
report_bug+0xb2/0x220 lib/bug.c:281
handle_bug+0x127/0x260 arch/x86/kernel/traps.c:435
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:489
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1549 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1547 [inline]
RIP: 0010:update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
Code: ab 48 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 9c fd ff ff 90 0f 0b 90 e9 93 fd ff ff 90 <0f> 0b 90 e9 4f fd ff ff 48 8d bb 18 0e 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc900035e7520 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853adc0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8daa494a RDI: ffffffff8bf2b580
RBP: 0000000000000001 R08: ffff8880b843b8c8 R09: fffffbfff2111d1a
R10: ffffffff9088e8d7 R11: 0000000000000001 R12: ffffffff90891954
R13: ffffffff8dd64f60 R14: ffff88801daabd00 R15: ffff8880b853adc0
pick_next_task kernel/sched/core.c:6088 [inline]
__schedule+0x212d/0x6150 kernel/sched/core.c:6805
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
smpboot_restore_warm_reset_vector arch/x86/kernel/smpboot.c:165 [inline]
arch_cpuhp_cleanup_kick_cpu arch/x86/kernel/smpboot.c:1023 [inline]
arch_cpuhp_cleanup_kick_cpu+0xbb/0x170 arch/x86/kernel/smpboot.c:1019
cpuhp_bp_sync_alive kernel/cpu.c:450 [inline]
cpuhp_bringup_ap+0x95/0x1100 kernel/cpu.c:839
cpuhp_invoke_callback+0x3d5/0xa10 kernel/cpu.c:195
__cpuhp_invoke_callback_range+0x101/0x210 kernel/cpu.c:968
cpuhp_invoke_callback_range kernel/cpu.c:992 [inline]
cpuhp_up_callbacks kernel/cpu.c:1023 [inline]
_cpu_up+0x3f5/0x960 kernel/cpu.c:1685
cpu_up+0x1bf/0x240 kernel/cpu.c:1717
cpu_subsys_online+0x84/0x190 drivers/base/cpu.c:61
device_online+0x114/0x1c0 drivers/base/core.c:4225
online_store+0x145/0x180 drivers/base/core.c:2809
dev_attr_store+0x58/0x80 drivers/base/core.c:2437
sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352
do_iter_readv_writev+0x662/0x9e0 fs/read_write.c:827
vfs_writev+0x35f/0xde0 fs/read_write.c:1057
do_writev+0x132/0x340 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f228718f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc51423ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f22873e5fa0 RCX: 00007f228718f7c9
RDX: 0000000000000008 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f2287213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22873e5fa0 R14: 00007f22873e5fa0 R15: 0000000000000003
WARNING: kernel/sched/sched.h:1549 at lockdep_assert_rq_held kernel/sched/sched.h:1549 [inline], CPU#0: syz.0.17/6018
WARNING: kernel/sched/sched.h:1549 at lockdep_assert_rq_held kernel/sched/sched.h:1547 [inline], CPU#0: syz.0.17/6018
WARNING: kernel/sched/sched.h:1549 at update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837, CPU#0: syz.0.17/6018
Modules linked in:
CPU: 0 UID: 0 PID: 6018 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1549 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1547 [inline]
RIP: 0010:update_rq_clock+0x34a/0xc70 kernel/sched/core.c:837
Code: ab 48 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc a8 04 0f 84 9c fd ff ff 90 0f 0b 90 e9 93 fd ff ff 90 <0f> 0b 90 e9 4f fd ff ff 48 8d bb 18 0e 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc900035e7520 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853adc0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8daa494a RDI: ffffffff8bf2b580
RBP: 0000000000000001 R08: ffff8880b843b8c8 R09: fffffbfff2111d1a
R10: ffffffff9088e8d7 R11: 0000000000000001 R12: ffffffff90891954
R13: ffffffff8dd64f60 R14: ffff88801daabd00 R15: ffff8880b853adc0
FS: 0000555593750500(0000) GS:ffff8881248fc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa291706e9c CR3: 0000000076536000 CR4: 00000000003526f0
Call Trace:
pick_next_task kernel/sched/core.c:6088 [inline]
__schedule+0x212d/0x6150 kernel/sched/core.c:6805
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:7047
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x61/0x80 kernel/locking/spinlock.c:194
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
smpboot_restore_warm_reset_vector arch/x86/kernel/smpboot.c:165 [inline]
arch_cpuhp_cleanup_kick_cpu arch/x86/kernel/smpboot.c:1023 [inline]
arch_cpuhp_cleanup_kick_cpu+0xbb/0x170 arch/x86/kernel/smpboot.c:1019
cpuhp_bp_sync_alive kernel/cpu.c:450 [inline]
cpuhp_bringup_ap+0x95/0x1100 kernel/cpu.c:839
cpuhp_invoke_callback+0x3d5/0xa10 kernel/cpu.c:195
__cpuhp_invoke_callback_range+0x101/0x210 kernel/cpu.c:968
cpuhp_invoke_callback_range kernel/cpu.c:992 [inline]
cpuhp_up_callbacks kernel/cpu.c:1023 [inline]
_cpu_up+0x3f5/0x960 kernel/cpu.c:1685
cpu_up+0x1bf/0x240 kernel/cpu.c:1717
cpu_subsys_online+0x84/0x190 drivers/base/cpu.c:61
device_online+0x114/0x1c0 drivers/base/core.c:4225
online_store+0x145/0x180 drivers/base/core.c:2809
dev_attr_store+0x58/0x80 drivers/base/core.c:2437
sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x3af/0x570 fs/kernfs/file.c:352
do_iter_readv_writev+0x662/0x9e0 fs/read_write.c:827
vfs_writev+0x35f/0xde0 fs/read_write.c:1057
do_writev+0x132/0x340 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f228718f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc51423ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007f22873e5fa0 RCX: 00007f228718f7c9
RDX: 0000000000000008 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007f2287213f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f22873e5fa0 R14: 00007f22873e5fa0 R15: 0000000000000003