sched: DL replenish lagged too much
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P24707/1:b..l P1217/1:b..l P25590/1:b..l
rcu: (detected by 0, t=10502 jiffies, g=227713, q=1074 ncpus=1)
task:syz.8.4410 state:R running task stack:25736 pid:25590 tgid:25590 ppid:24707 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2095 [inline]
zap_pmd_range mm/memory.c:2151 [inline]
zap_pud_range mm/memory.c:2179 [inline]
zap_p4d_range mm/memory.c:2200 [inline]
__zap_vma_range+0x23d3/0x48e0 mm/memory.c:2240
unmap_vmas+0x299/0x5f0 mm/memory.c:2309
exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
__mmput+0x12a/0x410 kernel/fork.c:1193
mmput+0x67/0x80 kernel/fork.c:1216
exit_mm kernel/exit.c:592 [inline]
do_exit+0x83b/0x2a60 kernel/exit.c:974
do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
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+0x139/0x700 kernel/entry/common.c:101
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f65b999e559
RSP: 002b:00007ffc0bc72d98 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f65b9c27da0 RCX: 00007f65b999e559
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f65b9c27da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f65b9c27cb0 R11: 0000000000000246 R12: 0000000000130339
R13: 00007f65b9c2618c R14: 00000000001302cb R15: 00007f65b9c26180
task:kworker/0:2 state:R running task stack:20680 pid:1217 tgid:1217 ppid:2 task_flags:0x4208160 flags:0x00080000
Workqueue: usb_hub_wq hub_event
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
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:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 cf 1d a6 13 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 de e8 5d 10 0f 82 c9 02 00 00 8b 35 7e 1a 5e 10 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 6d 1d a6 13 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc90005517208 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e3bd908 RDI: ffffffff8c625680
RBP: ffffffff8fdec5e0 R08: 000000005f362e29 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
save_stack+0x162/0x1e0 mm/page_owner.c:183
__reset_page_owner+0x84/0x190 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_noprof+0x2cc/0x840 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
usb_alloc_urb+0x66/0xa0 drivers/usb/core/urb.c:75
usb_internal_control_msg drivers/usb/core/message.c:110 [inline]
usb_control_msg+0x1d3/0x4b0 drivers/usb/core/message.c:167
set_port_feature drivers/usb/core/hub.c:469 [inline]
hub_port_reset+0x294/0x1bd0 drivers/usb/core/hub.c:3101
hub_port_init+0x1f2/0x37f0 drivers/usb/core/hub.c:4957
hub_port_connect drivers/usb/core/hub.c:5514 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5725 [inline]
port_event drivers/usb/core/hub.c:5889 [inline]
hub_event+0x2ead/0x4420 drivers/usb/core/hub.c:5971
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
task:syz-executor state:R running task stack:24104 pid:24707 tgid:24707 ppid:24692 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
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:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 cf 1d a6 13 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 de e8 5d 10 0f 82 c9 02 00 00 8b 35 7e 1a 5e 10 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 6d 1d a6 13 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900048b7528 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e3bd908 RDI: ffffffff8c625680
RBP: ffffffff8fdec5e0 R08: 00000000c7821519 R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
page_ext_get+0x36/0x1a0 mm/page_ext.c:522
__reset_page_owner+0x2b/0x190 mm/page_owner.c:324
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1418 [inline]
__free_frozen_pages+0x79f/0x10f0 mm/page_alloc.c:2962
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:361
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
__do_kmalloc_node mm/slub.c:5413 [inline]
__kmalloc_noprof+0x2cc/0x840 mm/slub.c:5439
_kmalloc_noprof include/linux/slab.h:995 [inline]
tomoyo_realpath_from_path+0xb6/0x690 security/tomoyo/realpath.c:251
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x2af/0x3c0 security/tomoyo/file.c:776
tomoyo_file_open+0x6b/0x90 security/tomoyo/tomoyo.c:334
security_file_open+0xb5/0x1e0 security/security.c:2739
do_dentry_open+0x588/0x14d0 fs/open.c:973
vfs_open+0x82/0x3f0 fs/open.c:1101
do_open fs/namei.c:4836 [inline]
path_openat+0x1a23/0x2450 fs/namei.c:4999
do_file_open+0x20e/0x430 fs/namei.c:5028
do_sys_openat2+0x10f/0x1e0 fs/open.c:1417
do_sys_open fs/open.c:1423 [inline]
__do_sys_openat fs/open.c:1439 [inline]
__se_sys_openat fs/open.c:1434 [inline]
__x64_sys_openat+0x12d/0x210 fs/open.c:1434
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
RIP: 0033:0x7f65b999d87c
RSP: 002b:00007ffc0bc72f30 EFLAGS: 00000206 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000000000000003c RCX: 00007f65b999d87c
RDX: 0000000000090800 RSI: 00007f65b9a353ed RDI: 00000000ffffff9c
RBP: 00007ffc0bc72fdc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000013
R13: 0000000000000000 R14: 000000000013034b R15: 00007ffc0bc73030
rcu: rcu_preempt kthread starved for 3810 jiffies! g227713 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:26776 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x1259/0x6920 kernel/sched/core.c:7284
__schedule_loop kernel/sched/core.c:7361 [inline]
schedule+0xdd/0x2c0 kernel/sched/core.c:7376
schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 3225 Comm: kworker/R-bat_e Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:kasan_save_stack+0x25/0x50 mm/kasan/common.c:54
Code: 90 90 90 90 90 0f 1f 40 d6 41 54 31 c0 b9 40 00 00 00 41 89 f4 55 89 fd 31 d2 be 40 00 00 00 53 48 81 ec 00 02 00 00 48 89 e7 48 ab 48 89 e7 e8 50 b8 75 ff 44 89 e1 89 ea 89 c6 48 89 e7 e8
RSP: 0018:ffffc90000007210 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881e245b730 RCX: 0000000000000020
RDX: 0000000000000000 RSI: 0000000000000040 RDI: ffffc90000007310
RBP: 0000000000000820 R08: 00000000892ed249 R09: 0000000000000000
R10: ffff8881e245b730 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000820 R14: ffff8881e245b640 R15: 00000000000000f0
FS: 0000000000000000(0000) GS:ffff888122946000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f458b7ffffc CR3: 0000000074054000 CR4: 00000000003526f0
DR0: 0000000080000001 DR1: 0000000000000003 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
kasan_save_track+0x14/0x30 mm/kasan/common.c:78
unpoison_slab_object mm/kasan/common.c:351 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:377
kasan_slab_alloc include/linux/kasan.h:253 [inline]
slab_post_alloc_hook mm/slub.c:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_node_noprof+0x282/0x6e0 mm/slub.c:5068
__alloc_skb+0x140/0x710 net/core/skbuff.c:704
alloc_skb include/linux/skbuff.h:1384 [inline]
synproxy_send_client_synack+0x19e/0x970 net/netfilter/nf_synproxy_core.c:463
nft_synproxy_eval_v4 net/netfilter/nft_synproxy.c:59 [inline]
nft_synproxy_do_eval+0xa6a/0xd30 net/netfilter/nft_synproxy.c:142
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x2e5/0x19d0 net/netfilter/nf_tables_core.c:285
nft_do_chain_ipv4+0x1d0/0x250 net/netfilter/nft_chain_filter.c:24
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xbf/0x220 net/netfilter/core.c:619
nf_hook.constprop.0+0x2a6/0x750 include/linux/netfilter.h:280
NF_HOOK include/linux/netfilter.h:323 [inline]
ip_local_deliver+0x163/0x1f0 net/ipv4/ip_input.c:262
dst_input include/net/dst.h:481 [inline]
ip_rcv_finish net/ipv4/ip_input.c:492 [inline]
NF_HOOK include/linux/netfilter.h:325 [inline]
NF_HOOK include/linux/netfilter.h:319 [inline]
ip_rcv+0x33a/0x3c0 net/ipv4/ip_input.c:612
__netif_receive_skb_one_core+0x197/0x1e0 net/core/dev.c:6297
__netif_receive_skb+0x1f/0x120 net/core/dev.c:6410
process_backlog+0x487/0x1600 net/core/dev.c:6761
__napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7830
napi_poll net/core/dev.c:7893 [inline]
net_rx_action+0xa40/0xf20 net/core/dev.c:8050
handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
do_softirq kernel/softirq.c:546 [inline]
do_softirq+0xaf/0xf0 kernel/softirq.c:533
__local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_local_purge+0x21c/0x3d0 net/batman-adv/translation-table.c:1402
batadv_tt_purge+0x8b/0xbd0 net/batman-adv/translation-table.c:3753
process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396
process_scheduled_works kernel/workqueue.c:3479 [inline]
rescuer_thread+0x918/0x14e0 kernel/workqueue.c:3703
kthread+0x373/0x450 kernel/kthread.c:436
ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245