rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5594/2:b..l P161/2:b..l P16561/2:b..l P29
rcu: (detected by 1, t=10502 jiffies, g=109941, q=433 ncpus=2)
task:ktimers/1 state:R running task stack:22288 pid:29 tgid:29 ppid:2 task_flags:0x4208040 flags:0x00080000
Call Trace:
sched_show_task+0x4aa/0x5f0 kernel/sched/core.c:8140
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:292 [inline]
print_other_cpu_stall+0xf7b/0x1310 kernel/rcu/tree_stall.h:681
check_cpu_stall kernel/rcu/tree_stall.h:856 [inline]
rcu_pending kernel/rcu/tree.c:3679 [inline]
rcu_sched_clock_irq+0x93d/0x1050 kernel/rcu/tree.c:2716
update_process_times+0x234/0x2d0 kernel/time/timer.c:2475
tick_sched_handle kernel/time/tick-sched.c:298 [inline]
tick_nohz_handler+0x3fb/0x730 kernel/time/tick-sched.c:319
__run_hrtimer kernel/time/hrtimer.c:1930 [inline]
__hrtimer_run_queues+0x3a0/0xaf0 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x44a/0x900 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:taprio_set_budgets+0x36b/0x3a0 net/sched/sch_taprio.c:680
Code: c7 40 f6 1a 8f 4c 89 e6 e8 62 79 b1 fb 4c 8b 7c 24 08 e9 3e fe ff ff e8 c3 cf 98 f8 eb 05 e8 bc cf 98 f8 48 83 c4 30 5b 41 5c <41> 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 fe c1 38
RSP: 0018:ffffc90000a3fad0 EFLAGS: 00000286
RAX: ffffffff892b37e4 RBX: ffff888038f15800 RCX: ffff88801d2a3d80
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000100
RBP: ffff888038f15c00 R08: 0000000000000000 R09: 0000000000000100
R10: 0000000000000000 R11: ffffffff8ddc7b60 R12: ffff888038f15800
R13: ffff888072a25000 R14: ffff888072a25380 R15: ffff88803e796036
advance_sched+0x979/0xc90 net/sched/sch_taprio.c:984
__run_hrtimer kernel/time/hrtimer.c:1930 [inline]
__hrtimer_run_queues+0x3eb/0xaf0 kernel/time/hrtimer.c:1994
hrtimer_run_softirq+0x18f/0x260 kernel/time/hrtimer.c:2011
handle_softirqs+0x1d9/0x6c0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
run_ktimerd+0x69/0x100 kernel/softirq.c:1151
smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
kthread+0x388/0x470 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
task:syz.9.3565 state:R running task stack:24336 pid:16561 tgid:16561 ppid:14662 task_flags:0x40004c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16d8/0x55e0 kernel/sched/core.c:7189
preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7370
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
rcu_read_unlock_sched include/linux/rcupdate.h:963 [inline]
pfn_valid+0x402/0x480 include/linux/mmzone.h:2291
page_table_check_clear+0x21/0x4f0 mm/page_table_check.c:70
ptep_get_and_clear_full arch/x86/include/asm/jump_label.h:-1 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:845 [inline]
zap_present_folio_ptes mm/memory.c:1648 [inline]
zap_present_ptes mm/memory.c:1730 [inline]
do_zap_pte_range mm/memory.c:1832 [inline]
zap_pte_range mm/memory.c:1934 [inline]
zap_pmd_range mm/memory.c:2020 [inline]
zap_pud_range mm/memory.c:2048 [inline]
zap_p4d_range mm/memory.c:2069 [inline]
__zap_vma_range+0x3769/0x4d20 mm/memory.c:2109
unmap_vmas+0x390/0x550 mm/memory.c:2178
exit_mmap+0x293/0x9f0 mm/mmap.c:1300
__mmput+0xcb/0x3d0 kernel/fork.c:1178
exit_mm+0x1e4/0x2b0 kernel/exit.c:582
do_exit+0x6cd/0x2360 kernel/exit.c:964
do_group_exit+0x22d/0x2f0 kernel/exit.c:1119
__do_sys_exit_group kernel/exit.c:1130 [inline]
__se_sys_exit_group kernel/exit.c:1128 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1128
x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf79aace59
RSP: 002b:00007ffe920d3458 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcf79aace59
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe920d34bc R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000059
R13: 00000000000927c0 R14: 00000000000e3e11 R15: 00007ffe920d3510
task:kworker/u8:6 state:R running task stack:19896 pid:161 tgid:161 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: bat_events batadv_dat_purge
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16d8/0x55e0 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8e0 kernel/entry/common.c:164
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x221/0x350 kernel/locking/lockdep.c:5872
Code: ff ff ff e8 01 1d 77 09 f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 db 07 a8 10 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 00 dd 7a 09 cc 48 8d 3d 38 0e cb
RSP: 0018:ffffc90003927980 EFLAGS: 00000282
RAX: 055d93fb5e053700 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 00000000cb681160 RSI: ffffffff8d65af40 RDI: ffffffff8b873ba0
RBP: ffffffff8b195630 R08: ffffffff8b195630 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8ddc7b60 R12: 0000000000000002
R13: ffffffff8ddc7b60 R14: 0000000000000000 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
rcu_read_lock include/linux/rcupdate.h:838 [inline]
__rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
rt_spin_lock+0x1fc/0x400 kernel/locking/spinlock_rt.c:57
spin_lock_bh include/linux/spinlock_rt.h:90 [inline]
__batadv_dat_purge+0x131/0x400 net/batman-adv/distributed-arp-table.c:173
batadv_dat_purge+0x20/0x70 net/batman-adv/distributed-arp-table.c:204
process_one_work kernel/workqueue.c:3314 [inline]
process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3397
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3478
kthread+0x388/0x470 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
task:syz-executor state:R running task stack:21776 pid:5594 tgid:5594 ppid:5593 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16d8/0x55e0 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x8e0 kernel/entry/common.c:164
asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:688
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x80 kernel/kcov.c:216
Code: 8b 3d 74 48 a6 0b 48 89 de 5b e9 f3 ec 5b 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0d 58 e8 83 10 65 8b 35 79 e8 83 10 81 e6 00 00 ff 00 ba
RSP: 0018:ffffc900043d7430 EFLAGS: 00000283
RAX: ffffffff8905516a RBX: 1ffff11005177cb0 RCX: ffff888040508000
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00000000000008ad
RBP: 0000000000000200 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8ddc7b60 R12: 1ffff11005177ce0
R13: 0000000000001000 R14: ffffea0000fb3c40 R15: 00000000000008ad
__ptr_ring_produce include/linux/ptr_ring.h:114 [inline]
page_pool_recycle_in_ring net/core/page_pool.c:791 [inline]
page_pool_put_unrefed_netmem+0x72a/0xa40 net/core/page_pool.c:912
page_pool_put_netmem include/net/page_pool/helpers.h:343 [inline]
page_pool_put_full_netmem include/net/page_pool/helpers.h:373 [inline]
napi_pp_put_page+0x133/0x1e0 net/core/skbuff.c:1028
skb_page_unref include/linux/skbuff_ref.h:40 [inline]
__skb_frag_unref include/linux/skbuff_ref.h:56 [inline]
skb_release_data+0x3ec/0xab0 net/core/skbuff.c:1108
skb_release_all net/core/skbuff.c:1189 [inline]
__napi_kfree_skb net/core/skbuff.c:1482 [inline]
kfree_skb_napi_cache net/core/skbuff.c:7283 [inline]
skb_attempt_defer_free+0x586/0x7c0 net/core/skbuff.c:7316
tcp_eat_recv_skb net/ipv4/tcp.c:1622 [inline]
tcp_recvmsg_locked+0x232c/0x3840 net/ipv4/tcp.c:2900
tcp_recvmsg+0xf6/0x540 net/ipv4/tcp.c:2945
sock_recvmsg_nosec net/socket.c:1140 [inline]
sock_recvmsg+0x155/0x1b0 net/socket.c:1160
sock_read_iter+0x24f/0x320 net/socket.c:1230
new_sync_read fs/read_write.c:493 [inline]
vfs_read+0x59e/0xa90 fs/read_write.c:574
ksys_read+0x156/0x270 fs/read_write.c:717
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f96086a7fd7
RSP: 002b:00007ffedd20a720 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000055555a4a1540 RCX: 00007f96086a7fd7
RDX: 00000000000012cc RSI: 000055555a4c3990 RDI: 0000000000000003
RBP: 00007ffedd20ac20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00000000000012cc R14: 00007ffedd20a810 R15: 000055555a4c3990
rcu: rcu_preempt kthread starved for 8795 jiffies! g109941 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:27328 pid:18 tgid:18 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x16d8/0x55e0 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x388/0x470 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:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:63
Code: 4b 53 02 e9 43 c4 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d c3 6c 12 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8da07dc0 EFLAGS: 00000242
RAX: 0000000000acad91 RBX: ffffffff8199006a RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8d3fdea3 RDI: ffffffff8b873ba0
RBP: ffffffff8da07eb8 R08: ffff8880b8833e9b R09: 1ffff110171067d3
R10: dffffc0000000000 R11: ffffed10171067d4 R12: 0000000000000000
R13: 1ffffffff1b5fdd8 R14: 0000000000000000 R15: 1ffffffff1b5fdd8
FS: 0000000000000000(0000) GS:ffff8881263a1000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055558b4cba38 CR3: 000000000dbb6000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:766 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x36a/0x5f0 kernel/sched/idle.c:352
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:451
rest_init+0x2de/0x300 init/main.c:762
start_kernel+0x38a/0x3e0 init/main.c:1220
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x147