rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5432
(detected by 1, t=10506 jiffies, g=14957, q=322 ncpus=2)
task:syz.2.309 state:R running task stack:25712 pid:5432 ppid:4280 flags:0x0000400a
Call Trace:
sched_show_task+0x497/0x5b0 kernel/sched/core.c:8954
rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
print_other_cpu_stall+0x10a9/0x1430 kernel/rcu/tree_stall.h:606
check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
rcu_pending kernel/rcu/tree.c:3895 [inline]
rcu_sched_clock_irq+0x88a/0x1230 kernel/rcu/tree.c:2394
update_process_times+0x143/0x1b0 kernel/time/timer.c:2072
tick_sched_handle kernel/time/tick-sched.c:254 [inline]
tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1751 [inline]
__hrtimer_run_queues+0x50b/0xd50 kernel/time/hrtimer.c:1815
hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1877
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
__sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x0/0x80 kernel/kcov.c:321
Code: 28 4d 39 ca 77 22 89 ff 89 f6 49 ff c0 4c 89 01 48 c7 44 11 08 05 00 00 00 48 89 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 90 <48> 8b 04 24 65 48 8b 0d b4 ef 7f 7e 65 8b 15 b5 ef 7f 7e 81 e2 00
RSP: 0018:ffffc900001e0ab8 EFLAGS: 00000246
RAX: ffffffff813a0d35 RBX: 00000000269e4140 RCX: 000000000000002e
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff8880269e4140 R08: ffff88802c2c9e00 R09: 0000000000000002
R10: 0000000000000001 R11: 0000000000000100 R12: ffff8880797d6ab0
R13: ffff88807b4f2458 R14: 000000000000002e R15: 0000000000000000
phys_addr_valid arch/x86/mm/physaddr.h:7 [inline]
__phys_addr+0xa8/0x170 arch/x86/mm/physaddr.c:28
virt_to_folio include/linux/mm.h:913 [inline]
virt_to_slab mm/slab.h:175 [inline]
kmem_cache_free+0x6f/0x290 mm/slub.c:3709
mac80211_hwsim_beacon_tx+0x61e/0xae0 drivers/net/wireless/mac80211_hwsim.c:2121
__iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
__run_hrtimer kernel/time/hrtimer.c:1751 [inline]
__hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1815
hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1832
handle_softirqs+0x2a1/0x930 kernel/softirq.c:596
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x5c/0xe0 kernel/kcov.c:349
Code: 41 54 53 48 8b 0c cd d8 2f 90 8a 48 8b 54 24 20 65 4c 8b 05 f6 ee 7f 7e 45 31 c9 eb 08 49 ff c1 4c 39 c8 74 77 4e 8b 54 ce 10 <65> 44 8b 1d e4 ee 7f 7e 41 81 e3 00 01 ff 00 74 13 41 81 fb 00 01
RSP: 0018:ffffc90004b3f490 EFLAGS: 00000212
RAX: 0000000000000020 RBX: 000000438ff3a0d7 RCX: 0000000000000005
RDX: ffffffff8185876c RSI: ffffffff8cb768c0 RDI: 0000000000000005
RBP: 0000000000000005 R08: ffff88802c2c9e00 R09: 0000000000000012
R10: 0000000000000012 R11: 0000000000000002 R12: 00000000000c7605
R13: 0000000000000018 R14: dffffc0000000000 R15: ffff88801776d028
check_buffer+0x2ac/0x900 kernel/trace/ring_buffer.c:3492
__rb_reserve_next+0x511/0xd70 kernel/trace/ring_buffer.c:3621
rb_reserve_next_event kernel/trace/ring_buffer.c:3756 [inline]
ring_buffer_lock_reserve+0xafa/0xf10 kernel/trace/ring_buffer.c:3815
__trace_buffer_lock_reserve kernel/trace/trace.c:956 [inline]
trace_event_buffer_lock_reserve+0x1ce/0x6f0 kernel/trace/trace.c:2843
trace_event_buffer_reserve+0x2a8/0x3d0 kernel/trace/trace_events.c:647
do_trace_event_raw_event_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
trace_event_raw_event_bpf_trace_printk+0x112/0x230 kernel/trace/bpf_trace.h:11
trace_bpf_trace_printk+0x199/0x220 kernel/trace/bpf_trace.h:11
____bpf_trace_printk kernel/trace/bpf_trace.c:391 [inline]
bpf_trace_printk+0x13e/0x1c0 kernel/trace/bpf_trace.c:374
bpf_prog_6b6697f7147dac0a+0x3d/0x60
bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline]
__bpf_prog_run include/linux/filter.h:607 [inline]
bpf_prog_run include/linux/filter.h:614 [inline]
bpf_test_run+0x2b6/0x830 net/bpf/test_run.c:402
bpf_prog_test_run_skb+0xd88/0x1890 net/bpf/test_run.c:1222
bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3695
__sys_bpf+0x62b/0x780 kernel/bpf/syscall.c:5049
__do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
__x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff48c79ce59
Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff48d630028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff48ca15fa0 RCX: 00007ff48c79ce59
RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a
RBP: 00007ff48c832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff48ca16038 R14: 00007ff48ca15fa0 R15: 00007ffd163e2398
rcu: rcu_preempt kthread timer wakeup didn't happen for 10484 jiffies! g14957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=9405
rcu: rcu_preempt kthread starved for 10485 jiffies! g14957 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27760 pid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5445 Comm: syz.3.313 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:rcu_dynticks_curr_cpu_in_eqs include/linux/context_tracking.h:122 [inline]
RIP: 0010:rcu_is_watching+0xc/0xa0 kernel/rcu/tree.c:721
Code: 49 b3 8c 4c 89 f6 e8 43 ca cc 02 e9 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 53 65 ff 05 1c fc 95 7e cf f7 c2 08 89 c3 83 f8 08 73 60 49 bf 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000007ce8 EFLAGS: 00000003
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff8188e757
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8e2029e8
RBP: 0000000000000000 R08: ffffffff8e2029ef R09: 1ffffffff1c4053d
R10: dffffc0000000000 R11: fffffbfff1c4053e R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS: 00007f37a58d46c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 000000007f9cd000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
trace_irq_disable include/trace/events/preemptirq.h:36 [inline]
trace_hardirqs_off_finish+0x86/0x180 kernel/trace/trace_preemptirq.c:67
irqentry_enter+0x33/0x50 kernel/entry/common.c:382
sysvec_irq_work+0xa/0xc0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1c8/0x930 kernel/softirq.c:584
Code: 89 7c 24 44 0f b7 db 48 c7 c7 80 10 8b 8a e8 0f 00 e0 08 65 66 c7 05 65 34 b4 7e 00 00 e8 40 79 39 00 fb 49 c7 c6 c0 a0 80 8c <89> 5c 24 4c b8 ff ff ff ff 0f bc 44 24 4c 41 89 c5 41 ff c5 0f 84
RSP: 0018:ffffc90000007e00 EFLAGS: 00000286
RAX: 6f0271a69c1ada00 RBX: 0000000000000200 RCX: 6f0271a69c1ada00
RDX: dffffc0000000000 RSI: ffffffff8a8c1aa0 RDI: ffffffff8adf2060
RBP: ffffc90000007f30 R08: ffffffff90aff277 R09: 1ffffffff215fe4e
R10: dffffc0000000000 R11: fffffbfff215fe4f R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff8c80a0c0 R15: 000000000000000a
__do_softirq kernel/softirq.c:630 [inline]
invoke_softirq kernel/softirq.c:470 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:rcu_read_unlock_special+0x8/0x510 kernel/rcu/tree_plugin.h:630
Code: f1 80 e1 07 80 c1 03 38 c1 7c 94 49 89 fd 4c 89 f7 e8 fc 44 66 00 4c 89 ef eb 84 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 <41> 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 65 48 8b 04 25 28
RSP: 0018:ffffc90004cd7760 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffff88802a9a043c RCX: 0000000000080000
RDX: ffffc9000f363000 RSI: 0000000000000326 RDI: ffff88802a9a0000
RBP: ffffc90004cd7770 R08: ffff88801a93e3c7 R09: 1ffff11003527c78
R10: dffffc0000000000 R11: ffffed1003527c79 R12: 1ffff11005534087
R13: 0000000000000000 R14: ffff88802a9a0440 R15: dffffc0000000000
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
page_ext_put+0x91/0xb0 mm/page_ext.c:182
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
prep_new_page mm/page_alloc.c:2566 [inline]
get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
__alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
__folio_alloc+0xe/0x30 mm/page_alloc.c:5689
vma_alloc_folio+0x4a3/0x900 mm/mempolicy.c:2243
alloc_page_vma include/linux/gfp.h:284 [inline]
do_anonymous_page mm/memory.c:4189 [inline]
handle_pte_fault mm/memory.c:5027 [inline]
__handle_mm_fault mm/memory.c:5171 [inline]
handle_mm_fault+0x22b1/0x3ee0 mm/memory.c:5292
do_user_addr_fault+0x51f/0xb10 arch/x86/mm/fault.c:1338
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:__put_user_nocheck_4+0x3/0x11
Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f
RSP: 0018:ffffc90004cd7e80 EFLAGS: 00050297
RAX: 0000000000000005 RBX: 00007fffffffeffd RCX: 00002000000029c0
RDX: 0000000000000000 RSI: ffffffff8a8c2c20 RDI: ffffffff8adf2060
RBP: 0000000000000005 R08: ffffffff8e2029ef R09: 1ffffffff1c4053d
R10: dffffc0000000000 R11: fffffbfff1c4053e R12: 0000000000000000
R13: 00002000000029c0 R14: 0000000000000001 R15: 0000000000000005
__sys_socketpair+0xb4/0x540 net/socket.c:1719
__do_sys_socketpair net/socket.c:1785 [inline]
__se_sys_socketpair net/socket.c:1782 [inline]
__x64_sys_socketpair+0x97/0xb0 net/socket.c:1782
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37a499ce59
Code: ff c3 66 2e 0f 1f 84 00 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 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f37a58d4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f37a4c16090 RCX: 00007f37a499ce59
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000001
RBP: 00007f37a4a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000029c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f37a4c16128 R14: 00007f37a4c16090 R15: 00007ffd0b787f18