rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=8964/1/0x4000000000000000 softirq=102696/102697 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P10064/1:b..l
rcu: (detected by 1, t=10506 jiffies, g=111509, q=201 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 21736 Comm: dhcpcd Not tainted 6.14.0-rc4-syzkaller-00248-g03d38806a902 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:kasan_check_range+0x7/0x290 mm/kasan/generic.c:188
Code: ff bc e3 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 <41> 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39
RSP: 0018:ffffc90000007a48 EFLAGS: 00000056
RAX: 0000000000000001 RBX: dffffc0000000000 RCX: ffffffff819e1dbf
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90000007ac0
RBP: ffffc90000007b30 R08: ffffffff9a8b0f1b R09: 1ffffffff35161e3
R10: dffffc0000000000 R11: fffffbfff35161e4 R12: ffffffff9a8b0f18
R13: 1ffff92000000f58 R14: ffffc90000007ac0 R15: 1ffffffff35161e4
FS: 00007fb56ee55740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb56eecefab CR3: 00000000486c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000003cc9
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1301 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
do_raw_spin_lock+0x14f/0x370 kernel/locking/spinlock_debug.c:116
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162
debug_object_activate+0x17f/0x580 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:455 [inline]
debug_activate kernel/time/hrtimer.c:496 [inline]
enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1100
__run_hrtimer kernel/time/hrtimer.c:1818 [inline]
__hrtimer_run_queues+0x6cb/0xd30 kernel/time/hrtimer.c:1865
hrtimer_interrupt+0x403/0xa40 kernel/time/hrtimer.c:1927
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
__sysvec_apic_timer_interrupt+0x110/0x420 arch/x86/kernel/apic/apic.c:1055
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:call_rcu+0x802/0xac0 kernel/rcu/tree.c:3173
Code: 1e 00 74 08 4c 89 ff e8 dc 30 7f 00 f6 84 24 81 00 00 00 02 75 54 f7 44 24 38 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4a> c7 04 2b 00 00 00 00 66 42 c7 44 2b 09 00 00 42 c6 44 2b 0b 00
RSP: 0018:ffffc90004137660 EFLAGS: 00000206
RAX: f336343f70338d00 RBX: dffffc0000000000 RCX: ffffffff819d2a9a
RDX: dffffc0000000000 RSI: ffffffff8c2aa4a0 RDI: ffffffff8c801c20
RBP: ffffc90004137780 R08: ffffffff94513877 R09: 1ffffffff28a270e
R10: dffffc0000000000 R11: fffffbfff28a270f R12: 1ffff110170c7f0d
R13: 1ffff92000826ed8 R14: 1ffff92000826edc R15: ffffc900041376e0
tlb_remove_table_free mm/mmu_gather.c:287 [inline]
tlb_table_flush+0x365/0x410 mm/mmu_gather.c:349
tlb_flush_mmu_free mm/mmu_gather.c:387 [inline]
tlb_flush_mmu+0x2f8/0x680 mm/mmu_gather.c:396
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:488
vms_clear_ptes+0x432/0x530 mm/vma.c:1144
vms_complete_munmap_vmas+0x210/0x8f0 mm/vma.c:1186
do_vmi_align_munmap+0x5ef/0x6f0 mm/vma.c:1445
do_vmi_munmap+0x24e/0x2d0 mm/vma.c:1493
__vm_munmap+0x372/0x510 mm/vma.c:2951
__do_sys_munmap mm/mmap.c:1084 [inline]
__se_sys_munmap mm/mmap.c:1081 [inline]
__x64_sys_munmap+0x60/0x70 mm/mmap.c:1081
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb56f02cb97
Code: b8 09 00 00 00 0f 05 48 3d 00 f0 ff ff 76 0c f7 d8 89 05 dc 46 01 00 48 83 c8 ff c3 0f 1f 80 00 00 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d b9 46 01 00 f7 d8 89 01 48 83
RSP: 002b:00007ffd1dcad0e8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000559664f373e0 RCX: 00007fb56f02cb97
RDX: 00007fb56effab00 RSI: 0000000000054188 RDI: 00007fb56edb0000
RBP: 00007ffd1dcad1e0 R08: 0000000000000000 R09: 2635c2f5ee20935b
R10: 00007ffd1dcad070 R11: 0000000000000206 R12: 00007fb56f040000
R13: 0000000000000000 R14: 0000559664f373e0 R15: 0000000000000000
task:syz-executor state:R running task stack:20544 pid:10064 tgid:10064 ppid:10047 task_flags:0x400140 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
preempt_schedule_common+0x84/0xd0 kernel/sched/core.c:6944
preempt_schedule+0xe1/0xf0 kernel/sched/core.c:6968
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
copy_pte_range mm/memory.c:1201 [inline]
copy_pmd_range+0x6ddc/0x77b0 mm/memory.c:1262
copy_pud_range mm/memory.c:1299 [inline]
copy_p4d_range mm/memory.c:1323 [inline]
copy_page_range+0x99f/0xe90 mm/memory.c:1421
dup_mmap kernel/fork.c:748 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm+0x1269/0x2160 kernel/fork.c:1752
copy_process+0x17d1/0x3cf0 kernel/fork.c:2403
kernel_clone+0x223/0x870 kernel/fork.c:2815
__do_sys_clone kernel/fork.c:2958 [inline]
__se_sys_clone kernel/fork.c:2942 [inline]
__x64_sys_clone+0x267/0x2e0 kernel/fork.c:2942
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f72971839d3
RSP: 002b:00007ffff5f01da8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f72971839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558a1f47d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000019fa5b R15: 00007ffff5f01f40
rcu: rcu_preempt kthread starved for 10506 jiffies! g111509 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:25624 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_timeout+0x15a/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x2df/0x1330 kernel/rcu/tree.c:2024
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2226
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 16764 Comm: syz-executor Not tainted 6.14.0-rc4-syzkaller-00248-g03d38806a902 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1bae/0x2d30 kernel/smp.c:885
Code: 89 e6 83 e6 01 31 ff e8 30 f5 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 e0 f0 0b 00 eb 41 f3 90 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 03 84 c0 75 11 41 f7 45 00 01 00 00 00 74 1e e8 bb f0 0b
RSP: 0018:ffffc9000f737500 EFLAGS: 00000293
RAX: dffffc0000000000 RBX: 1ffff110170c8c75 RCX: ffff888026108000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000f737700 R08: ffffffff81b5cdd0 R09: 1ffffffff28a270e
R10: dffffc0000000000 R11: fffffbfff28a270f R12: ffff8880b873f9c8
R13: ffff8880b86463a8 R14: ffff8880b873f9c0 R15: 0000000000000000
FS: 00005555775f3500(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7297ed56c0 CR3: 000000006b7fc000 CR4: 00000000003526f0
Call Trace:
on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:966 [inline]
flush_tlb_mm_range+0x42d/0x710 arch/x86/mm/tlb.c:1054
dup_mmap kernel/fork.c:787 [inline]
dup_mm kernel/fork.c:1700 [inline]
copy_mm+0x18af/0x2160 kernel/fork.c:1752
copy_process+0x17d1/0x3cf0 kernel/fork.c:2403
kernel_clone+0x223/0x870 kernel/fork.c:2815
__do_sys_clone kernel/fork.c:2958 [inline]
__se_sys_clone kernel/fork.c:2942 [inline]
__x64_sys_clone+0x267/0x2e0 kernel/fork.c:2942
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd663f839d3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffc2facb788 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd663f839d3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 00005555775f37d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000019fa7a R15: 00007ffc2facb920