rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=d734/1/0x4000000000000000 softirq=66210/66211 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P14216/1:b..l
rcu: 	(detected by 0, t=10506 jiffies, g=65145, q=285 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16721 Comm: syz.2.2903 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:kasan_check_range+0x1b8/0x290 mm/kasan/generic.c:189
Code: 4d 01 fb 48 8d 5d 07 48 85 ed 48 0f 49 dd 48 83 e3 f8 48 29 dd 74 12 41 80 3b 00 0f 85 a6 00 00 00 49 ff c3 48 ff cd 75 ee 5b <41> 5c 41 5e 41 5f 5d c3 cc cc cc cc 40 84 ed 75 5f f7 c5 00 ff 00
RSP: 0018:ffffc90000a189e8 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 0000000000000021 RCX: ffffffff819acb34
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942c3840
RBP: 0000000000000000 R08: ffffffff942c3847 R09: 1ffffffff2858708
R10: dffffc0000000000 R11: fffffbfff2858709 R12: ffff88807abb64d4
R13: ffff88807abb5a00 R14: dffffc0000000001 R15: fffffbfff2858709
FS:  0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f41260aad58 CR3: 000000003409a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 __lock_acquire+0xc94/0x2100 kernel/locking/lockdep.c:5198
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0xa1e/0xca0 net/sched/sch_taprio.c:985
 __run_hrtimer kernel/time/hrtimer.c:1801 [inline]
 __hrtimer_run_queues+0x59b/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:check_kcov_mode kernel/kcov.c:194 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x35/0x90 kernel/kcov.c:321
Code: 0c 25 00 d5 03 00 65 8b 05 50 72 44 7e 25 00 01 ff 00 74 10 3d 00 01 00 00 75 57 83 b9 2c 16 00 00 00 74 4e 8b 81 08 16 00 00 <83> f8 03 75 43 48 8b 91 10 16 00 00 44 8b 89 0c 16 00 00 49 c1 e1
RSP: 0018:ffffc90005a87258 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88806d638d10 RCX: ffff88807abb5a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005a87610 R08: ffffffff82093ad4 R09: 1ffffd40001b792e
R10: dffffc0000000000 R11: fffff940001b792f R12: ffffc90005a87840
R13: ffffc90005a87840 R14: 8000000036f26007 R15: 00007fbbe4ba2000
 do_zap_pte_range mm/memory.c:1697 [inline]
 zap_pte_range mm/memory.c:1740 [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+0xd34/0x48d0 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
 get_signal+0x16b2/0x1750 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbbe5b8cde9
Code: Unable to access opcode bytes at 0x7fbbe5b8cdbf.
RSP: 002b:00007fbbe39f60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbbe5da5fa8 RCX: 00007fbbe5b8cde9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbbe5da5fa8
RBP: 00007fbbe5da5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbbe5da5fac
R13: 0000000000000000 R14: 00007ffde5340cf0 R15: 00007ffde5340dd8
 </TASK>
task:syz-executor    state:R  running task     stack:20544 pid:14216 tgid:14216 ppid:14207  task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5377 [inline]
 __schedule+0x18bc/0x4c40 kernel/sched/core.c:6764
 preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7086
 irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__kasan_check_write+0x0/0x20 mm/kasan/shadow.c:36
Code: 48 8b 0c 24 31 d2 e9 af e6 ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 7c e6 ff ff 66 2e
RSP: 0018:ffffc900036e74c8 EFLAGS: 00000293
RAX: ffffffff822cdb05 RBX: 0000000000000001 RCX: ffff88802beb5a00
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801e614490
RBP: 0000000000000000 R08: ffffffff822cdae6 R09: 0000000000000009
R10: dffffc0000000000 R11: fffffbfff20344ef R12: 0000000000000000
R13: dffffc0000000000 R14: ffff88801e614498 R15: ffff88801e614490
 instrument_write include/linux/instrumented.h:40 [inline]
 ___clear_bit include/asm-generic/bitops/instrumented-non-atomic.h:44 [inline]
 __update_page_owner_free_handle mm/page_owner.c:272 [inline]
 __reset_page_owner+0x152/0x430 mm/page_owner.c:298
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_folios+0xe2f/0x18a0 mm/page_alloc.c:2707
 folios_put_refs+0x76c/0x860 mm/swap.c:994
 folio_batch_release include/linux/pagevec.h:101 [inline]
 shmem_undo_range+0x593/0x1820 mm/shmem.c:1112
 shmem_truncate_range mm/shmem.c:1224 [inline]
 shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1352
 evict+0x4e8/0x9a0 fs/inode.c:796
 do_unlinkat+0x512/0x830 fs/namei.c:4596
 __do_sys_unlink fs/namei.c:4637 [inline]
 __se_sys_unlink fs/namei.c:4635 [inline]
 __x64_sys_unlink+0x47/0x50 fs/namei.c:4635
 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: 0033:0x7f1ead18c397
RSP: 002b:00007ffed9e83208 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1ead18c397
RDX: 00007ffed9e83230 RSI: 00007ffed9e832c0 RDI: 00007ffed9e832c0
RBP: 00007ffed9e832c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffed9e84350
R13: 00007f1ead20e08c R14: 00000000000f60ab R15: 00007ffed9e84390
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g65145 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:25752 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 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
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 16729 Comm: syz.0.2902 Not tainted 6.14.0-rc1-syzkaller-00034-g92514ef226f5 #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 b0 e8 0b 00 41 83 e4 01 4c 8b 64 24 68 75 07 e8 60 e4 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:ffffc90005aaf400 EFLAGS: 00000293
RAX: ffffffff81b37985 RBX: 1ffff110170e88c9 RCX: ffff88802ea7da00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90005aaf600 R08: ffffffff81b37950 R09: 1ffffffff285870e
R10: dffffc0000000000 R11: fffffbfff285870f R12: ffff8880b863f9c8
R13: ffff8880b8744648 R14: ffff8880b863f9c0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3423ad56c0 CR3: 0000000064772000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000c98e000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 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]
 tlb_flush_mmu+0x1aa/0x680 mm/mmu_gather.c:395
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:488
 exit_mmap+0x52a/0xd40 mm/mmap.c:1297
 __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
 get_signal+0x16b2/0x1750 kernel/signal.c:3036
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xce/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf57f8cde9
Code: Unable to access opcode bytes at 0x7fbf57f8cdbf.
RSP: 002b:00007fbf55dd50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fbf581a6168 RCX: 00007fbf57f8cde9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fbf581a6168
RBP: 00007fbf581a6160 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbf581a616c
R13: 0000000000000000 R14: 00007ffc3dec36f0 R15: 00007ffc3dec37d8
 </TASK>