------------[ cut here ]------------
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G L
------------------------------------------------------
syz.3.3377/20243 is trying to acquire lock:
ffffffff8ecf5cc0 (console_owner){-.-.}-{0:0}, at: console_lock_spinning_enable+0x61/0x80 kernel/printk/printk.c:1902
but task is already holding lock:
ffff8880b843b960 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:685 [inline]
ffff8880b843b960 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:669
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (&rq->__lock){-.-.}-{2:2}:
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
_raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:413
raw_spin_rq_lock_nested+0x2c/0x140 kernel/sched/core.c:677
raw_spin_rq_lock kernel/sched/sched.h:1678 [inline]
_task_rq_lock+0xcf/0x500 kernel/sched/core.c:772
cgroup_move_task+0x81/0x320 kernel/sched/psi.c:1176
css_set_move_task+0x285/0x600 kernel/cgroup/cgroup.c:927
cgroup_post_fork+0x1f9/0x9a0 kernel/cgroup/cgroup.c:7084
copy_process+0x64da/0x8370 kernel/fork.c:2574
kernel_clone+0x176/0x9d0 kernel/fork.c:2772
rest_init+0xa3/0x2e0 init/main.c:688
start_kernel+0x48e/0x490 init/main.c:1181
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x158
-> #3 (&p->pi_lock){-.-.}-{2:2}:
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
__raw_spin_lock_irq_disable include/linux/spinlock_api_smp.h:174 [inline]
_raw_spin_lock_irq_disable+0x5e/0x90 kernel/locking/spinlock.c:197
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:594 [inline]
try_to_wake_up+0xc1/0x1c90 kernel/sched/core.c:4302
__queue_work+0x4a6/0x1370 kernel/workqueue.c:2458
queue_work_on+0x1a9/0x1e0 kernel/workqueue.c:2501
queue_work include/linux/workqueue.h:699 [inline]
rpm_suspend+0xf6b/0x1220 drivers/base/power/runtime.c:685
rpm_idle+0x60c/0x790 drivers/base/power/runtime.c:559
__pm_runtime_idle+0xba/0x1a0 drivers/base/power/runtime.c:1129
pm_runtime_put include/linux/pm_runtime.h:551 [inline]
__device_attach+0x37e/0x4d0 drivers/base/dd.c:1116
device_initial_probe+0xaf/0xd0 drivers/base/dd.c:1153
bus_probe_device+0x64/0x160 drivers/base/bus.c:620
device_add+0x121d/0x1970 drivers/base/core.c:3776
serial_base_port_add+0x227/0x2b0 drivers/tty/serial/serial_base_bus.c:186
serial_core_port_device_add drivers/tty/serial/serial_core.c:3275 [inline]
serial_core_register_port+0x13c/0x16f0 drivers/tty/serial/serial_core.c:3314
serial8250_register_8250_port+0x15af/0x2330 drivers/tty/serial/8250/8250_core.c:828
serial_pnp_probe+0x436/0x930 drivers/tty/serial/8250/8250_pnp.c:480
pnp_device_probe+0x2b3/0x4a0 drivers/pnp/driver.c:111
call_driver_probe drivers/base/dd.c:628 [inline]
really_probe+0x241/0xa60 drivers/base/dd.c:706
__driver_probe_device+0x210/0x460 drivers/base/dd.c:868
driver_probe_device+0x4a/0x140 drivers/base/dd.c:898
__driver_attach+0x21f/0x5b0 drivers/base/dd.c:1292
bus_for_each_dev+0x13e/0x1d0 drivers/base/bus.c:383
bus_add_driver+0x305/0x5b0 drivers/base/bus.c:763
driver_register+0x1e2/0x360 drivers/base/driver.c:174
serial8250_init+0xcc/0x1c0 drivers/tty/serial/8250/8250_platform.c:317
do_one_initcall+0x11c/0x6f0 init/main.c:1353
do_initcall_level init/main.c:1415 [inline]
do_initcalls init/main.c:1431 [inline]
do_basic_setup init/main.c:1451 [inline]
kernel_init_freeable+0x6ea/0x7b0 init/main.c:1666
kernel_init+0x21/0x1e0 init/main.c:1556
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
-> #2 (&dev->power.lock){-.-.}-{3:3}:
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181
__pm_runtime_resume+0xa9/0x170 drivers/base/power/runtime.c:1196
pm_runtime_get include/linux/pm_runtime.h:494 [inline]
__uart_start+0x1b0/0x510 drivers/tty/serial/serial_core.c:149
uart_write+0x211/0xb20 drivers/tty/serial/serial_core.c:629
process_output_block drivers/tty/n_tty.c:557 [inline]
n_tty_write+0x431/0x1160 drivers/tty/n_tty.c:2366
iterate_tty_write drivers/tty/tty_io.c:1006 [inline]
file_tty_write.isra.0+0x4d2/0x890 drivers/tty/tty_io.c:1054
tty_write drivers/tty/tty_io.c:1075 [inline]
redirected_tty_write drivers/tty/tty_io.c:1098 [inline]
redirected_tty_write+0xd4/0x120 drivers/tty/tty_io.c:1078
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x6af/0x1050 fs/read_write.c:687
ksys_write+0x12a/0x250 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&port_lock_key){-.-.}-{3:3}:
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:155 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:181
uart_port_lock_irqsave include/linux/serial_core.h:719 [inline]
serial8250_console_write+0x177/0x1a50 drivers/tty/serial/8250/8250_port.c:3344
console_emit_next_record kernel/printk/printk.c:3183 [inline]
console_flush_one_record+0x78e/0xf10 kernel/printk/printk.c:3268
console_flush_all kernel/printk/printk.c:3350 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3380 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3420
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
register_console.cold+0xc0/0x248 kernel/printk/printk.c:4212
univ8250_console_init+0x6f/0x80 drivers/tty/serial/8250/8250_core.c:515
console_init+0x3d5/0x5b0 kernel/printk/printk.c:4411
start_kernel+0x314/0x490 init/main.c:1118
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x158
-> #0 (console_owner){-.-.}-{0:0}:
check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
check_prevs_add kernel/locking/lockdep.c:3300 [inline]
validate_chain kernel/locking/lockdep.c:3924 [inline]
__lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5253
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x737/0xf10 kernel/printk/printk.c:3268
console_flush_all kernel/printk/printk.c:3350 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3380 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3420
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x34/0x141 lib/bug.c:248
report_bug+0xb3/0x220 lib/bug.c:286
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593
lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1663 [inline]
update_rq_clock+0x40a/0xd20 kernel/sched/core.c:875
pick_next_task kernel/sched/core.c:6361 [inline]
__schedule+0x1c69/0x6920 kernel/sched/core.c:7185
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7592
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
variable_test_bit arch/x86/include/asm/bitops.h:222 [inline]
arch_test_bit arch/x86/include/asm/bitops.h:233 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:142 [inline]
cpumask_test_cpu include/linux/cpumask.h:650 [inline]
cpu_online include/linux/cpumask.h:1232 [inline]
trace_lock_release include/trace/events/lock.h:68 [inline]
lock_release+0x40/0x310 kernel/locking/lockdep.c:5897
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
__update_page_owner_handle+0x390/0x530 mm/page_owner.c:288
__set_page_owner+0x11f/0x540 mm/page_owner.c:360
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2495
folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2514
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1922
shmem_alloc_and_add_folio+0x371/0xd40 mm/shmem.c:1964
shmem_get_folio_gfp+0x75b/0x1980 mm/shmem.c:2517
shmem_get_folio mm/shmem.c:2623 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3254
generic_perform_write+0x292/0xa40 mm/filemap.c:4374
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3429
__kernel_write_iter+0x2ac/0x930 fs/read_write.c:621
dump_emit_page fs/coredump.c:1293 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1367
elf_core_dump+0x2d68/0x3d20 fs/binfmt_elf.c:2106
coredump_write fs/coredump.c:1047 [inline]
do_coredump fs/coredump.c:1126 [inline]
vfs_coredump+0x281a/0x54a0 fs/coredump.c:1195
get_signal+0x1f2a/0x21e0 kernel/signal.c:3031
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x402/0xa10 kernel/entry/common.c:165
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
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 ***
locks held by syz.3.3377/20243: 6, last CPU#0:
#0: ffff8880287b2460 (sb_writers#6){.+.+}-{0:0}, at: get_signal+0x1f2a/0x21e0 kernel/signal.c:3031
#1: ffff8880478194a0 (&sb->s_type->i_mutex_key#15){++++}-{4:4}, at: inode_lock include/linux/fs.h:1025 [inline]
#1: ffff8880478194a0 (&sb->s_type->i_mutex_key#15){++++}-{4:4}, at: shmem_file_write_iter+0x86/0x140 mm/shmem.c:3419
#2: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#2: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#2: ffffffff8ede9d40 (rcu_read_lock){....}-{1:3}, at: __update_page_owner_handle+0x63/0x530 mm/page_owner.c:273
#3: ffff8880b843b960 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:685 [inline]
#3: ffff8880b843b960 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x88/0x140 kernel/sched/core.c:669
#4: ffffffff8edd6100 (console_lock){+.+.}-{0:0}, at: _printk+0xcf/0x110 kernel/printk/printk.c:2504
#5: ffffffff8edd6178 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:305 [inline]
#5: ffffffff8edd6178 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:428 [inline]
#5: ffffffff8edd6178 (console_srcu){....}-{0:0}, at: console_srcu_read_lock kernel/printk/printk.c:291 [inline]
#5: ffffffff8edd6178 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfd/0xf10 kernel/printk/printk.c:3246
stack backtrace:
CPU: 0 UID: 0 PID: 20243 Comm: syz.3.3377 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
print_circular_bug.cold+0x178/0x1be kernel/locking/lockdep.c:2059
check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2191
check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
check_prevs_add kernel/locking/lockdep.c:3300 [inline]
validate_chain kernel/locking/lockdep.c:3924 [inline]
__lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5253
lock_acquire kernel/locking/lockdep.c:5886 [inline]
lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5843
console_lock_spinning_enable+0x72/0x80 kernel/printk/printk.c:1902
console_emit_next_record kernel/printk/printk.c:3177 [inline]
console_flush_one_record+0x737/0xf10 kernel/printk/printk.c:3268
console_flush_all kernel/printk/printk.c:3350 [inline]
__console_flush_and_unlock kernel/printk/printk.c:3380 [inline]
console_unlock+0x103/0x260 kernel/printk/printk.c:3420
vprintk_emit+0x407/0x6b0 kernel/printk/printk.c:2479
_printk+0xcf/0x110 kernel/printk/printk.c:2504
__report_bug.cold+0x34/0x141 lib/bug.c:248
report_bug+0xb3/0x220 lib/bug.c:286
handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436
exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490
asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1663 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:875
Code: ab c8 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 c8 69 f3 09 a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 c0 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc900052561b8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b900 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8e3add81 RDI: ffffffff8c615f80
RBP: ffffc90005256358 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880b843c498 R11: 0000000000000000 R12: ffffffff91438a84
R13: ffff8880b853c7e0 R14: ffff8880b853b900 R15: 0000000000000001
pick_next_task kernel/sched/core.c:6361 [inline]
__schedule+0x1c69/0x6920 kernel/sched/core.c:7185
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7592
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:trace_lock_release include/trace/events/lock.h:68 [inline]
RIP: 0010:lock_release+0x40/0x310 kernel/locking/lockdep.c:5897
Code: 2d cd 86 a1 12 48 89 6c 24 10 48 89 f5 0f 1f 44 00 00 65 8b 05 e9 86 a1 12 83 f8 07 0f 87 07 02 00 00 48 0f a3 05 70 ff 5c 0f <0f> 82 02 02 00 00 44 8b 05 17 31 5d 0f 45 85 c0 0f 84 48 01 00 00
RSP: 0018:ffffc90005256478 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffffffff8ede9d40 RCX: 0000000000000000
RDX: ffff888033fa2580 RSI: ffffffff828890fb RDI: ffffffff8ede9d40
RBP: ffffffff828890fb R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff88801e5c4d50
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
__update_page_owner_handle+0x390/0x530 mm/page_owner.c:288
__set_page_owner+0x11f/0x540 mm/page_owner.c:360
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2495
folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2514
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1922
shmem_alloc_and_add_folio+0x371/0xd40 mm/shmem.c:1964
shmem_get_folio_gfp+0x75b/0x1980 mm/shmem.c:2517
shmem_get_folio mm/shmem.c:2623 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3254
generic_perform_write+0x292/0xa40 mm/filemap.c:4374
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3429
__kernel_write_iter+0x2ac/0x930 fs/read_write.c:621
dump_emit_page fs/coredump.c:1293 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1367
elf_core_dump+0x2d68/0x3d20 fs/binfmt_elf.c:2106
coredump_write fs/coredump.c:1047 [inline]
do_coredump fs/coredump.c:1126 [inline]
vfs_coredump+0x281a/0x54a0 fs/coredump.c:1195
get_signal+0x1f2a/0x21e0 kernel/signal.c:3031
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x402/0xa10 kernel/entry/common.c:165
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f74aed9e0e1
Code: 00 00 00 00 0f 1f 44 00 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f74af025fa0 RCX: 00007f74aed9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f74aee35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f74af026038 R14: 00007f74af025fa0 R15: 00007fffb15c8978
debug_locks && !(lock_is_held(&(__rq_lockp(rq))->dep_map) != 0)
WARNING: kernel/sched/sched.h:1666 at lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline], CPU#0: syz.3.3377/20243
WARNING: kernel/sched/sched.h:1666 at lockdep_assert_rq_held kernel/sched/sched.h:1663 [inline], CPU#0: syz.3.3377/20243
WARNING: kernel/sched/sched.h:1666 at update_rq_clock+0x40a/0xd20 kernel/sched/core.c:875, CPU#0: syz.3.3377/20243
Modules linked in:
CPU: 0 UID: 0 PID: 20243 Comm: syz.3.3377 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1666 [inline]
RIP: 0010:lockdep_assert_rq_held kernel/sched/sched.h:1663 [inline]
RIP: 0010:update_rq_clock+0x40a/0xd20 kernel/sched/core.c:875
Code: ab c8 0b 00 00 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f e9 c8 69 f3 09 a8 04 0f 84 df fc ff ff 90 0f 0b 90 e9 d6 fc ff ff 90 <0f> 0b 90 e9 92 fc ff ff 4c 8d 83 c0 0b 00 00 48 b8 00 00 00 00 00
RSP: 0018:ffffc900052561b8 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff8880b853b900 RCX: 0000000000000001
RDX: 0000000000000046 RSI: ffffffff8e3add81 RDI: ffffffff8c615f80
RBP: ffffc90005256358 R08: 0000000000000001 R09: 0000000000000001
R10: ffff8880b843c498 R11: 0000000000000000 R12: ffffffff91438a84
R13: ffff8880b853c7e0 R14: ffff8880b853b900 R15: 0000000000000001
FS: 00007f74afd1b6c0(0000) GS:ffff888123ba2000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9af61eb7c0 CR3: 00000000759e9000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 6085f59d27ae5551 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
pick_next_task kernel/sched/core.c:6361 [inline]
__schedule+0x1c69/0x6920 kernel/sched/core.c:7185
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7592
irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:trace_lock_release include/trace/events/lock.h:68 [inline]
RIP: 0010:lock_release+0x40/0x310 kernel/locking/lockdep.c:5897
Code: 2d cd 86 a1 12 48 89 6c 24 10 48 89 f5 0f 1f 44 00 00 65 8b 05 e9 86 a1 12 83 f8 07 0f 87 07 02 00 00 48 0f a3 05 70 ff 5c 0f <0f> 82 02 02 00 00 44 8b 05 17 31 5d 0f 45 85 c0 0f 84 48 01 00 00
RSP: 0018:ffffc90005256478 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffffffff8ede9d40 RCX: 0000000000000000
RDX: ffff888033fa2580 RSI: ffffffff828890fb RDI: ffffffff8ede9d40
RBP: ffffffff828890fb R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: ffff88801e5c4d50
rcu_lock_release include/linux/rcupdate.h:310 [inline]
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
__update_page_owner_handle+0x390/0x530 mm/page_owner.c:288
__set_page_owner+0x11f/0x540 mm/page_owner.c:360
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
prep_new_page mm/page_alloc.c:1879 [inline]
get_page_from_freelist+0x110d/0x35b0 mm/page_alloc.c:3943
__alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2495
folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2514
shmem_alloc_folio+0x135/0x160 mm/shmem.c:1922
shmem_alloc_and_add_folio+0x371/0xd40 mm/shmem.c:1964
shmem_get_folio_gfp+0x75b/0x1980 mm/shmem.c:2517
shmem_get_folio mm/shmem.c:2623 [inline]
shmem_write_begin+0x1a4/0x420 mm/shmem.c:3254
generic_perform_write+0x292/0xa40 mm/filemap.c:4374
shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3429
__kernel_write_iter+0x2ac/0x930 fs/read_write.c:621
dump_emit_page fs/coredump.c:1293 [inline]
dump_user_range+0x3f9/0xad0 fs/coredump.c:1367
elf_core_dump+0x2d68/0x3d20 fs/binfmt_elf.c:2106
coredump_write fs/coredump.c:1047 [inline]
do_coredump fs/coredump.c:1126 [inline]
vfs_coredump+0x281a/0x54a0 fs/coredump.c:1195
get_signal+0x1f2a/0x21e0 kernel/signal.c:3031
arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
irqentry_exit+0x402/0xa10 kernel/entry/common.c:165
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f74aed9e0e1
Code: 00 00 00 00 0f 1f 44 00 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 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f74af025fa0 RCX: 00007f74aed9e0d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f74aee35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f74af026038 R14: 00007f74af025fa0 R15: 00007fffb15c8978
----------------
Code disassembly (best guess):
0: 2d cd 86 a1 12 sub $0x12a186cd,%eax
5: 48 89 6c 24 10 mov %rbp,0x10(%rsp)
a: 48 89 f5 mov %rsi,%rbp
d: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
12: 65 8b 05 e9 86 a1 12 mov %gs:0x12a186e9(%rip),%eax # 0x12a18702
19: 83 f8 07 cmp $0x7,%eax
1c: 0f 87 07 02 00 00 ja 0x229
22: 48 0f a3 05 70 ff 5c bt %rax,0xf5cff70(%rip) # 0xf5cff9a
29: 0f
* 2a: 0f 82 02 02 00 00 jb 0x232 <-- trapping instruction
30: 44 8b 05 17 31 5d 0f mov 0xf5d3117(%rip),%r8d # 0xf5d314e
37: 45 85 c0 test %r8d,%r8d
3a: 0f 84 48 01 00 00 je 0x188