rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=18fc/1/0x4000000000000000 softirq=75440/75449 fqs=15
rcu: (detected by 1, t=10505 jiffies, g=58261, q=1844 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 14433 Comm: syz.0.3666 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:lockdep_recursion_inc kernel/locking/lockdep.c:467 [inline]
RIP: 0010:lock_release+0x9c/0x2f0 kernel/locking/lockdep.c:5886
Code: b6 ec 0a 00 00 85 f6 0f 85 ff 00 00 00 48 81 3b 00 bb aa 93 0f 84 f2 00 00 00 9c 41 5d fa 48 c7 c7 e4 20 cd 8d e8 54 d1 d4 09 <65> ff 05 15 42 0c 12 8b 0d 3b 28 ed 0e c7 44 24 08 01 00 00 00 c7
RSP: 0018:ffffc90000007cc0 EFLAGS: 00000096
RAX: 0000000000000000 RBX: ffffffff9ad96198 RCX: 1ffff1100f1efae9
RDX: 0000000000000000 RSI: ffffffff8dcd20e4 RDI: ffffffff8bf482a0
RBP: 0000000000000002 R08: 0000000000000001 R09: fffff52000000f92
R10: 0000000000000002 R11: ffffffff9ad96180 R12: ffffffff84d663fc
R13: 0000000000000006 R14: ffff88807c37a440 R15: 1ffff92000000fa8
FS: 00007f35a15826c0(0000) GS:ffff8881249df000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f35a09b7bac CR3: 00000000798b6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x1a/0x80 kernel/locking/spinlock.c:194
debug_object_activate+0x2ec/0x4c0 lib/debugobjects.c:836
debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline]
debug_activate kernel/time/hrtimer.c:484 [inline]
enqueue_hrtimer+0x23/0x3b0 kernel/time/hrtimer.c:1088
__run_hrtimer kernel/time/hrtimer.c:1778 [inline]
__hrtimer_run_queues+0x8ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:pte_none arch/x86/include/asm/pgtable.h:993 [inline]
RIP: 0010:copy_pte_range mm/memory.c:1138 [inline]
RIP: 0010:copy_pmd_range mm/memory.c:1255 [inline]
RIP: 0010:copy_pud_range mm/memory.c:1292 [inline]
RIP: 0010:copy_p4d_range mm/memory.c:1316 [inline]
RIP: 0010:copy_page_range+0xf72/0x5fe0 mm/memory.c:1410
Code: 24 60 00 00 00 00 e8 ad 09 b3 ff 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 0f 85 01 45 00 00 49 8b 06 31 ff 48 89 c3 48 89 44 24 28 <48> 83 e3 9f 48 89 de e8 f2 04 b3 ff 48 85 db 0f 84 c4 0a 00 00 e8
RSP: 0018:ffffc900043f7770 EFLAGS: 00000246
RAX: 800000007543e007 RBX: 800000007543e007 RCX: ffffc9000539a000
RDX: 0000000000080000 RSI: ffffffff82082943 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000005 R09: 00000000000000ff
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff888054ccdec0 R15: 00007f359fdfd000
dup_mmap kernel/fork.c:726 [inline]
dup_mm kernel/fork.c:1734 [inline]
copy_mm kernel/fork.c:1786 [inline]
copy_process+0x862b/0x91a0 kernel/fork.c:2429
kernel_clone+0xfc/0x960 kernel/fork.c:2844
__do_sys_clone+0xce/0x120 kernel/fork.c:2987
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f35a078e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f35a1581fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f35a09b5fa0 RCX: 00007f35a078e969
RDX: 0000000000000000 RSI: 00000000fffffe10 RDI: 0000000000000000
RBP: 00007f35a0810ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f35a09b5fa0 R15: 00007ffe4b9ee898
rcu: rcu_preempt kthread starved for 10430 jiffies! g58261 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27704 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x116f/0x5de0 kernel/sched/core.c:6767
__schedule_loop kernel/sched/core.c:6845 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6860
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2046
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2248
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 14434 Comm: syz.2.3668 Not tainted 6.15.0-rc5-syzkaller-00038-g707df3375124 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x4aa/0x1290 kernel/smp.c:885
Code: 0c 00 85 ed 74 48 48 8b 44 24 20 49 89 c4 83 e0 07 49 c1 ec 03 48 89 c5 4d 01 f4 83 c5 03 e8 5d 17 0c 00 f3 90 41 0f b6 04 24 <40> 38 c5 7c 08 84 c0 0f 85 de 0b 00 00 8b 43 08 31 ff 83 e0 01 41
RSP: 0018:ffffc9000338f5a8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b8441720 RCX: ffffc9000d731000
RDX: 0000000000080000 RSI: ffffffff81af1b93 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed10170882e5
R13: 0000000000000001 R14: dffffc0000000000 R15: ffff8880b853b040
FS: 00007f34133a26c0(0000) GS:ffff888124adf000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f67100fa6b0 CR3: 000000001d6a9000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:2455 [inline]
text_poke_bp_batch+0x657/0x760 arch/x86/kernel/alternative.c:2665
text_poke_bp+0xa2/0xd0 arch/x86/kernel/alternative.c:2892
__static_call_transform+0x33a/0x720 arch/x86/kernel/static_call.c:111
arch_static_call_transform+0xb6/0xc0 arch/x86/kernel/static_call.c:163
__static_call_update+0xef/0x670 kernel/static_call_inline.c:147
tracepoint_update_call kernel/tracepoint.c:271 [inline]
tracepoint_add_func+0xa88/0xea0 kernel/tracepoint.c:312
tracepoint_probe_register_prio_may_exist+0xb9/0x100 kernel/tracepoint.c:435
tracepoint_probe_register_may_exist include/linux/tracepoint.h:50 [inline]
bpf_probe_register+0x189/0x200 kernel/trace/bpf_trace.c:2431
bpf_raw_tp_link_attach+0x2cc/0x600 kernel/bpf/syscall.c:4005
bpf_raw_tracepoint_open kernel/bpf/syscall.c:4036 [inline]
__sys_bpf+0x3b4/0x4d80 kernel/bpf/syscall.c:5876
__do_sys_bpf kernel/bpf/syscall.c:5941 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5939 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5939
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f341258e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f34133a2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f34127b5fa0 RCX: 00007f341258e969
RDX: 0000000000000018 RSI: 00002000000000c0 RDI: 0000000000000011
RBP: 00007f3412610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f34127b5fa0 R15: 00007fff769bf398