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): P16363/1:b..l.. P16130/1:b..l.. P14505/1:b..l.. P16369/1:b..l.. P16370/1:b..l..
rcu: (detected by 0, t=10502 jiffies, g=172729, q=1230065 ncpus=1)
task:syz.4.1523 state:R running task stack:26792 pid:16370 tgid:16368 ppid:14635 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
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+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2059 [inline]
zap_pmd_range mm/memory.c:2117 [inline]
zap_pud_range mm/memory.c:2145 [inline]
zap_p4d_range mm/memory.c:2166 [inline]
__zap_vma_range+0x3d52/0x4b80 mm/memory.c:2206
unmap_vmas+0x38b/0x550 mm/memory.c:2275
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1194
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 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+0x32c/0x530 arch/x86/entry/syscall_64.c:107
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x00007fb4f839fb19
RSP: 002b:00007fb4f9285028 EFLAGS: 00000246 ORIG_RAX: 0000000000000113
RAX: fffffffffffffe00 RBX: 00007fb4f8625fa0 RCX: 00007fb4f839fb19
RDX: 0000000000000009 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007fb4f8437b70 R08: 0000000000000f3a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb4f8626038 R14: 00007fb4f8625fa0 R15: 00007fff239f3dc8
task:syz.2.1520 state:R running task stack:24680 pid:16369 tgid:16369 ppid:14323 task_flags:0x40044c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
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+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2059 [inline]
zap_pmd_range mm/memory.c:2117 [inline]
zap_pud_range mm/memory.c:2145 [inline]
zap_p4d_range mm/memory.c:2166 [inline]
__zap_vma_range+0x3d52/0x4b80 mm/memory.c:2206
unmap_vmas+0x38b/0x550 mm/memory.c:2275
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1194
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 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+0x32c/0x530 arch/x86/entry/syscall_64.c:107
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x00007f58f799fb19
RSP: 002b:00007ffff3a9e728 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffff92 RBX: 00000000000ce555 RCX: 00007f58f799fb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f58f7c25fac
RBP: 0000000000000fd2 R08: 3fffffffffffffff R09: 0000000000000000
R10: 00007ffff3a9e830 R11: 0000000000000246 R12: 00007ffff3a9e850
R13: 00007f58f7c25fac R14: 00000000000cf527 R15: 00007ffff3a9e830
task:syz-executor state:R running task stack:22152 pid:14505 tgid:14505 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
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+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2059 [inline]
zap_pmd_range mm/memory.c:2117 [inline]
zap_pud_range mm/memory.c:2145 [inline]
zap_p4d_range mm/memory.c:2166 [inline]
__zap_vma_range+0x3d52/0x4b80 mm/memory.c:2206
unmap_vmas+0x38b/0x550 mm/memory.c:2275
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1194
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 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+0x32c/0x530 arch/x86/entry/syscall_64.c:107
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x00007f6827d9e127
RSP: 002b:00007ffe010cff18 EFLAGS: 00000206 ORIG_RAX: 0000000000000005
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f6827d9e127
RDX: 0000000000000000 RSI: 00007ffe010cff20 RDI: 0000000000000003
RBP: 00007ffe010d001c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000039
R13: 0000000000000000 R14: 00000000000ce526 R15: 00007ffe010d0070
task:syz.5.1483 state:R running task stack:21160 pid:16130 tgid:16130 ppid:15391 task_flags:0x40064c flags:0x00080001
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7662
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:543 [inline]
irqentry_exit+0x14f/0x9b0 kernel/entry/common.c:154
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947
Code: ff ff ff e8 90 36 67 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 32 c0 3e 13 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 cf 49 6a 0a cc 48 8d 3d 27 4f 1d
RSP: 0018:ffffc900052eeca0 EFLAGS: 00000296
RAX: 3b81e5e1b63e2400 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000105209fd RSI: ffffffff8e93c1df RDI: ffffffff8c8eba80
RBP: ffff88807f940000 R08: ffffffff817889df R09: 0000000000000000
R10: ffffc900052eedd8 R11: ffffffff81b3c670 R12: ffffffff9015a560
R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246
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+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:183
__reset_page_owner+0x73/0x2a0 mm/page_owner.c:338
reset_page_owner include/linux/page_owner.h:26 [inline]
__free_pages_prepare mm/page_alloc.c:1416 [inline]
free_unref_folios+0xdcc/0x15d0 mm/page_alloc.c:3032
folios_put_refs+0x5b6/0x6d0 mm/folio.c:1100
folio_batch_release include/linux/folio_batch.h:101 [inline]
shmem_undo_range+0x55a/0x1730 mm/shmem.c:1377
shmem_truncate_range mm/shmem.c:1513 [inline]
shmem_evict_inode+0x240/0xb00 mm/shmem.c:1657
evict+0x624/0xb50 fs/inode.c:822
dentry_kill+0x1b9/0x910 fs/dcache.c:856
finish_dput+0x1a/0x260 fs/dcache.c:1031
__fput+0x65b/0xa40 fs/file_table.c:521
task_work_run+0x1d9/0x260 kernel/task_work.c:233
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x705/0x2360 kernel/exit.c:980
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 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+0x348/0x9b0 kernel/entry/common.c:152
exc_general_protection+0x16b/0x1f0 arch/x86/kernel/traps.c:914
asm_exc_general_protection+0x26/0x30 arch/x86/include/asm/idtentry.h:589
RIP: 0033:0x00007fe3b9d9fb21
RSP: 002b:00002000000002f0 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007fe3ba026180 RCX: 00007fe3b9d9fb19
RDX: 0000200000000300 RSI: 00002000000002f0 RDI: 0000000000800200
RBP: 00007fe3b9e37b70 R08: 0000200000000380 R09: 0000200000000380
R10: 0000200000000340 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fe3ba026218 R14: 00007fe3ba026180 R15: 00007ffed19e0b78
task:syz.9.1514 state:R running task stack:23816 pid:16363 tgid:16354 ppid:14505 task_flags:0x40054c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
preempt_schedule_common+0x7f/0xd0 kernel/sched/core.c:7561
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+0x41/0x50 kernel/locking/spinlock.c:213
spin_unlock include/linux/spinlock.h:401 [inline]
zap_pte_range mm/memory.c:2059 [inline]
zap_pmd_range mm/memory.c:2117 [inline]
zap_pud_range mm/memory.c:2145 [inline]
zap_p4d_range mm/memory.c:2166 [inline]
__zap_vma_range+0x3d52/0x4b80 mm/memory.c:2206
unmap_vmas+0x38b/0x550 mm/memory.c:2275
exit_mmap+0x290/0xa40 mm/mmap.c:1315
__mmput+0x118/0x420 kernel/fork.c:1194
exit_mm+0x18e/0x240 kernel/exit.c:586
do_exit+0x6a8/0x2360 kernel/exit.c:967
do_group_exit+0x22d/0x2f0 kernel/exit.c:1123
get_signal+0x136a/0x1430 kernel/signal.c:3113
arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
exit_to_user_mode_loop+0x10e/0x770 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+0x32c/0x530 arch/x86/entry/syscall_64.c:107
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x00007f6827d9fb19
RSP: 002b:00007f6825ff60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6828026098 RCX: 00007f6827d9fb19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6828026098
RBP: 00007f6828026090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6828026128 R14: 00007ffe010cfb90 R15: 00007ffe010cfc78
rcu: rcu_preempt kthread starved for 9797 jiffies! g172729 f0x2 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:27400 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5830 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122
rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 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: 3232 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 10/15/2026
Workqueue: bat_events batadv_tt_purge
RIP: 0010:memset_orig+0x52/0xb0 arch/x86/lib/memset_64.S:77
Code: 0f 1f 84 00 00 00 00 00 48 ff c9 48 89 07 48 89 47 08 48 89 47 10 48 89 47 18 48 89 47 20 48 89 47 28 48 89 47 30 48 89 47 38 <48> 8d 7f 40 75 d8 0f 1f 84 00 00 00 00 00 89 d1 83 e1 38 74 14 c1
RSP: 0018:ffffc900000071d8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8881ac8ffa80 RCX: 0000000000000000
RDX: 0000000000000058 RSI: 0000000000000000 RDI: ffffed103591ff50
RBP: 0000000000082820 R08: ffffffff82371d0b R09: 0000000000000000
R10: ffffed103591ff50 R11: fffffbfff237ca98 R12: ffff8881ac8ffa80
R13: 00000000000002c0 R14: 00000000000002c0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881233f0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbee58ef68c CR3: 000000003ba8e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000006800 DR2: 0000000000009951
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
kasan_poison mm/kasan/shadow.c:146 [inline]
kasan_unpoison+0x48/0x70 mm/kasan/shadow.c:178
unpoison_slab_object mm/kasan/common.c:350 [inline]
__kasan_slab_alloc+0x58/0x80 mm/kasan/common.c:380
kasan_slab_alloc include/linux/kasan.h:257 [inline]
slab_post_alloc_hook mm/slub.c:4716 [inline]
slab_alloc_node mm/slub.c:5029 [inline]
kmem_cache_alloc_node_noprof+0x34f/0x600 mm/slub.c:5101
kmalloc_reserve net/core/skbuff.c:616 [inline]
__alloc_skb+0x27a/0x7a0 net/core/skbuff.c:716
alloc_skb include/linux/skbuff.h:1390 [inline]
synproxy_send_client_synack+0x175/0xde0 net/netfilter/nf_synproxy_core.c:463
nft_synproxy_eval_v4+0x362/0x4e0 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x389/0x5d0 net/netfilter/nft_synproxy.c:142
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x48d/0x1b10 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc5/0x220 net/netfilter/core.c:633
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:323
NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:325
__netif_receive_skb_one_core net/core/dev.c:6437 [inline]
__netif_receive_skb net/core/dev.c:6550 [inline]
process_backlog+0xa6b/0x18b0 net/core/dev.c:6901
__napi_poll+0xaa/0x330 net/core/dev.c:7987
napi_poll net/core/dev.c:8050 [inline]
net_rx_action+0x61d/0xf50 net/core/dev.c:8207
handle_softirqs+0x265/0x8d0 kernel/softirq.c:669
do_softirq+0x77/0xd0 kernel/softirq.c:569
__local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2930 [inline]
batadv_tt_purge+0x4ee/0xa40 net/batman-adv/translation-table.c:4333
process_one_work kernel/workqueue.c:3505 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3588
rescuer_thread+0x84a/0x12a0 kernel/workqueue.c:3813
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245