rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 GPs behind) idle=8944/1/0x4000000000000000 softirq=21683/21684 fqs=1
rcu: (detected by 1, t=10502 jiffies, g=19261, q=285 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7459 Comm: syz.3.606 Not tainted 6.14.0-rc2-syzkaller-00259-g7ff71e6d9239 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:__lock_acquire+0xef4/0x2100
Code: c5 13 31 d5 01 f3 29 ee 01 eb c1 c5 04 31 f5 48 c1 e5 20 48 c7 c0 14 e5 3b 90 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 9f 0c 00 00 <48> 09 dd 83 3d c6 22 9f 0e 00 4d 89 e5 0f 85 7d 04 00 00 48 83 7c
RSP: 0018:ffffc90000007930 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000aa3bd169 RCX: 0000000033b37d7c
RDX: 0000000000d3daf7 RSI: 000000004fa421e6 RDI: dffffc0000000000
RBP: 97064f2600000000 R08: ffffffff9450e847 R09: 1ffffffff28a1d08
R10: dffffc0000000000 R11: fffffbfff28a1d09 R12: ffff8880213a1e00
R13: ffff8880213a1e00 R14: 00000000fa3a4712 R15: 0000000000000000
FS: 000055557e366500(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2faf49 CR3: 000000006b0c6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
debug_object_deactivate+0x158/0x390 lib/debugobjects.c:873
debug_hrtimer_deactivate kernel/time/hrtimer.c:460 [inline]
debug_deactivate+0x1b/0x220 kernel/time/hrtimer.c:502
__run_hrtimer kernel/time/hrtimer.c:1769 [inline]
__hrtimer_run_queues+0x305/0xd30 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:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
Code: 24 65 48 8b 0c 25 00 d5 03 00 65 8b 15 10 1d 42 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 2c 16 00 00 00 74 2c <8b> 91 08 16 00 00 83 fa 02 75 21 48 8b 91 10 16 00 00 48 8b 32 48
RSP: 0018:ffffc900044cfd18 EFLAGS: 00000246
RAX: ffffffff84ed5bf7 RBX: 00007ffe1c56ed80 RCX: ffff8880213a1e00
RDX: 0000000000000000 RSI: 00007ffe1c56ed80 RDI: ffffc900044cfd80
RBP: ffffc900044cfdf0 R08: ffffc900044cfd8f R09: 0000000000000000
R10: ffffc900044cfd80 R11: fffff52000899fb2 R12: dffffc0000000000
R13: ffffc900044cfd80 R14: ffffc900044cfd80 R15: 0000000000000010
_copy_from_user+0x17/0xb0 lib/usercopy.c:17
copy_from_user include/linux/uaccess.h:212 [inline]
get_timespec64+0x97/0x280 kernel/time/time.c:877
__do_sys_futex kernel/futex/syscalls.c:171 [inline]
__se_sys_futex+0x1a2/0x480 kernel/futex/syscalls.c:160
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: 0033:0x7f98c218cde9
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:00007ffe1c56ec88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 000000000002195c RCX: 00007f98c218cde9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f98c23a5fac
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 000000041c56ef7f
R10: 00007ffe1c56ed80 R11: 0000000000000246 R12: 00007f98c23a5fac
R13: 00007ffe1c56ed80 R14: 000000000002198e R15: 00007ffe1c56eda0
rcu: rcu_preempt kthread starved for 10500 jiffies! g19261 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:24144 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5377 [inline]
__schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
__schedule_loop kernel/sched/core.c:6841 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6856
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: 7421 Comm: syz.1.588 Not tainted 6.14.0-rc2-syzkaller-00259-g7ff71e6d9239 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0x1ba4/0x2d30 kernel/smp.c:885
Code: 03 84 c0 75 7e 45 8b 65 00 44 89 e6 83 e6 01 31 ff e8 e0 f2 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 90 ee 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
RSP: 0018:ffffc900038671c0 EFLAGS: 00000293
RAX: ffffffff81b5c975 RBX: 1ffff110170c8c75 RCX: ffff88802d1a9e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900038673c0 R08: ffffffff81b5c940 R09: 1ffffffff207764e
R10: dffffc0000000000 R11: ffffffff816a90d0 R12: ffff8880b873f9c8
R13: ffff8880b86463a8 R14: ffff8880b873f9c0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c32dcc2 CR3: 000000001cf88000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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
tlb_flush arch/x86/include/asm/tlb.h:20 [inline]
tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:481 [inline]
zap_pte_range mm/memory.c:1758 [inline]
zap_pmd_range mm/memory.c:1823 [inline]
zap_pud_range mm/memory.c:1852 [inline]
zap_p4d_range mm/memory.c:1873 [inline]
unmap_page_range+0x3b8c/0x48e0 mm/memory.c:1894
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1984
exit_mmap+0x283/0xd40 mm/mmap.c:1284
__mmput+0x115/0x410 kernel/fork.c:1356
exit_mm+0x220/0x310 kernel/exit.c:570
do_exit+0x9ad/0x28e0 kernel/exit.c:925
do_group_exit+0x207/0x2c0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096
x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7f2cfb98cde9
Code: Unable to access opcode bytes at 0x7f2cfb98cdbf.
RSP: 002b:00007fffd1114ca8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2cfb98cde9
RDX: 00007f2cfa7f9000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffd1114d0c R08: 000000000000f8e4 R09: 00000000000927c0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000072
R13: 00000000000927c0 R14: 000000000002130b R15: 00007fffd1114d60