======================================================
WARNING: possible circular locking dependency detected
6.4.0-rc1-syzkaller-00001-gba0ad6ed89fd #0 Not tainted
------------------------------------------------------
ksoftirqd/1/23 is trying to acquire lock:
ffff88803fffeba0 (&pgdat->kswapd_wait){..-.}-{2:2}, at: __wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
but task is already holding lock:
ffff88802c72b858 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
ffff88802c72b858 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x23e/0xbe0 kernel/time/hrtimer.c:1749
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #4 (hrtimer_bases.lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
lock_hrtimer_base kernel/time/hrtimer.c:173 [inline]
hrtimer_start_range_ns+0xe9/0xd80 kernel/time/hrtimer.c:1296
hrtimer_start_expires include/linux/hrtimer.h:432 [inline]
do_start_rt_bandwidth kernel/sched/rt.c:116 [inline]
start_rt_bandwidth kernel/sched/rt.c:127 [inline]
inc_rt_group kernel/sched/rt.c:1241 [inline]
inc_rt_tasks kernel/sched/rt.c:1285 [inline]
__enqueue_rt_entity kernel/sched/rt.c:1461 [inline]
enqueue_rt_entity kernel/sched/rt.c:1510 [inline]
enqueue_task_rt+0xa86/0xfc0 kernel/sched/rt.c:1545
enqueue_task+0xad/0x330 kernel/sched/core.c:2082
__sched_setscheduler.constprop.0+0xb89/0x25d0 kernel/sched/core.c:7774
_sched_setscheduler kernel/sched/core.c:7820 [inline]
sched_setscheduler_nocheck kernel/sched/core.c:7867 [inline]
sched_set_fifo+0xb1/0x110 kernel/sched/core.c:7891
irq_thread+0xe3/0x540 kernel/irq/manage.c:1302
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
-> #3 (&rt_b->rt_runtime_lock){-.-.}-{2:2}:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
__enable_runtime kernel/sched/rt.c:876 [inline]
rq_online_rt+0xb3/0x3b0 kernel/sched/rt.c:2485
set_rq_online.part.0+0xf9/0x140 kernel/sched/core.c:9541
set_rq_online kernel/sched/core.c:9533 [inline]
sched_cpu_activate+0x216/0x440 kernel/sched/core.c:9649
cpuhp_invoke_callback+0x645/0xeb0 kernel/cpu.c:192
cpuhp_thread_fun+0x47f/0x700 kernel/cpu.c:815
smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
-> #2 (&rq->__lock){-.-.}-{2:2}:
_raw_spin_lock_nested+0x34/0x40 kernel/locking/spinlock.c:378
raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558
raw_spin_rq_lock kernel/sched/sched.h:1366 [inline]
rq_lock kernel/sched/sched.h:1653 [inline]
task_fork_fair+0x74/0x4f0 kernel/sched/fair.c:12095
sched_cgroup_fork+0x3d1/0x540 kernel/sched/core.c:4777
copy_process+0x4b8a/0x7600 kernel/fork.c:2618
kernel_clone+0xeb/0x890 kernel/fork.c:2918
user_mode_thread+0xb1/0xf0 kernel/fork.c:2996
rest_init+0x27/0x2b0 init/main.c:700
arch_call_rest_init+0x13/0x30 init/main.c:834
start_kernel+0x3b6/0x490 init/main.c:1088
x86_64_start_reservations+0x18/0x30 arch/x86/kernel/head64.c:556
x86_64_start_kernel+0xb3/0xc0 arch/x86/kernel/head64.c:537
secondary_startup_64_no_verify+0xf4/0xfb
-> #1 (&p->pi_lock){-.-.}-{2:2}:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
try_to_wake_up+0xab/0x1c40 kernel/sched/core.c:4191
autoremove_wake_function+0x16/0x150 kernel/sched/wait.c:419
__wake_up_common+0x147/0x650 kernel/sched/wait.c:107
__wake_up_common_lock+0xd4/0x140 kernel/sched/wait.c:138
wakeup_kswapd+0x3fe/0x5c0 mm/vmscan.c:7797
rmqueue mm/page_alloc.c:3057 [inline]
get_page_from_freelist+0x6c5/0x2c00 mm/page_alloc.c:3499
__alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768
__folio_alloc+0x16/0x40 mm/page_alloc.c:4800
vma_alloc_folio+0x155/0x890 mm/mempolicy.c:2240
do_anonymous_page mm/memory.c:4085 [inline]
do_pte_missing mm/memory.c:3645 [inline]
handle_pte_fault mm/memory.c:4947 [inline]
__handle_mm_fault+0x224c/0x41c0 mm/memory.c:5089
handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
do_user_addr_fault+0x2ca/0x1210 arch/x86/mm/fault.c:1349
handle_page_fault arch/x86/mm/fault.c:1534 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
-> #0 (&pgdat->kswapd_wait){..-.}-{2:2}:
check_prev_add kernel/locking/lockdep.c:3108 [inline]
check_prevs_add kernel/locking/lockdep.c:3227 [inline]
validate_chain kernel/locking/lockdep.c:3842 [inline]
__lock_acquire+0x2f21/0x5df0 kernel/locking/lockdep.c:5074
lock_acquire kernel/locking/lockdep.c:5691 [inline]
lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
wakeup_kswapd+0x3fe/0x5c0 mm/vmscan.c:7797
wake_all_kswapds+0x182/0x2d0 mm/page_alloc.c:4028
__alloc_pages_slowpath.constprop.0+0x1724/0x2170 mm/page_alloc.c:4296
__alloc_pages+0x408/0x4a0 mm/page_alloc.c:4781
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x390 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3192
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291
__slab_alloc_node mm/slub.c:3344 [inline]
slab_alloc_node mm/slub.c:3441 [inline]
slab_alloc mm/slub.c:3459 [inline]
__kmem_cache_alloc_lru mm/slub.c:3466 [inline]
kmem_cache_alloc+0x38e/0x3b0 mm/slub.c:3475
kmem_cache_zalloc include/linux/slab.h:670 [inline]
fill_pool+0x264/0x5c0 lib/debugobjects.c:168
debug_objects_fill_pool lib/debugobjects.c:597 [inline]
debug_object_activate+0xfd/0x400 lib/debugobjects.c:693
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x320 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xa5b/0xbe0 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17f/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
run_ksoftirqd kernel/softirq.c:939 [inline]
run_ksoftirqd+0x31/0x60 kernel/softirq.c:931
smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
other info that might help us debug this:
Chain exists of:
&pgdat->kswapd_wait --> &rt_b->rt_runtime_lock --> hrtimer_bases.lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(hrtimer_bases.lock);
lock(&rt_b->rt_runtime_lock);
lock(hrtimer_bases.lock);
lock(&pgdat->kswapd_wait);
*** DEADLOCK ***
1 lock held by ksoftirqd/1/23:
#0: ffff88802c72b858 (hrtimer_bases.lock){-.-.}-{2:2}, at: __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
#0: ffff88802c72b858 (hrtimer_bases.lock){-.-.}-{2:2}, at: __hrtimer_run_queues+0x23e/0xbe0 kernel/time/hrtimer.c:1749
stack backtrace:
CPU: 1 PID: 23 Comm: ksoftirqd/1 Not tainted 6.4.0-rc1-syzkaller-00001-gba0ad6ed89fd #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2188
check_prev_add kernel/locking/lockdep.c:3108 [inline]
check_prevs_add kernel/locking/lockdep.c:3227 [inline]
validate_chain kernel/locking/lockdep.c:3842 [inline]
__lock_acquire+0x2f21/0x5df0 kernel/locking/lockdep.c:5074
lock_acquire kernel/locking/lockdep.c:5691 [inline]
lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5656
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3d/0x60 kernel/locking/spinlock.c:162
__wake_up_common_lock+0xb8/0x140 kernel/sched/wait.c:137
wakeup_kswapd+0x3fe/0x5c0 mm/vmscan.c:7797
wake_all_kswapds+0x182/0x2d0 mm/page_alloc.c:4028
__alloc_pages_slowpath.constprop.0+0x1724/0x2170 mm/page_alloc.c:4296
__alloc_pages+0x408/0x4a0 mm/page_alloc.c:4781
alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279
alloc_slab_page mm/slub.c:1851 [inline]
allocate_slab+0x25f/0x390 mm/slub.c:1998
new_slab mm/slub.c:2051 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3192
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3291
__slab_alloc_node mm/slub.c:3344 [inline]
slab_alloc_node mm/slub.c:3441 [inline]
slab_alloc mm/slub.c:3459 [inline]
__kmem_cache_alloc_lru mm/slub.c:3466 [inline]
kmem_cache_alloc+0x38e/0x3b0 mm/slub.c:3475
kmem_cache_zalloc include/linux/slab.h:670 [inline]
fill_pool+0x264/0x5c0 lib/debugobjects.c:168
debug_objects_fill_pool lib/debugobjects.c:597 [inline]
debug_object_activate+0xfd/0x400 lib/debugobjects.c:693
debug_hrtimer_activate kernel/time/hrtimer.c:420 [inline]
debug_activate kernel/time/hrtimer.c:475 [inline]
enqueue_hrtimer+0x27/0x320 kernel/time/hrtimer.c:1084
__run_hrtimer kernel/time/hrtimer.c:1702 [inline]
__hrtimer_run_queues+0xa5b/0xbe0 kernel/time/hrtimer.c:1749
hrtimer_run_softirq+0x17f/0x360 kernel/time/hrtimer.c:1766
__do_softirq+0x1d4/0x905 kernel/softirq.c:571
run_ksoftirqd kernel/softirq.c:939 [inline]
run_ksoftirqd+0x31/0x60 kernel/softirq.c:931
smpboot_thread_fn+0x659/0x9e0 kernel/smpboot.c:164
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>