rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P5608/1:b..l P7112/1:b..l P5595/1:b..l P7110/1:b..l
rcu: 	(detected by 0, t=10503 jiffies, g=20997, q=412 ncpus=2)
task:syz.0.342       state:R  running task     stack:27720 pid:7110  tgid:7105  ppid:5596   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:206
Code: d6 2c 62 00 48 89 df 5b e9 ed 10 68 00 be 03 00 00 00 5b e9 22 2d 20 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 65 48 8b 05 8c 59 81 13 48 8b 34 24 65 48 8b 15 70 59
RSP: 0018:ffffc9000a197930 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffff88807b9f8e00 RCX: ffffffff821fc2b4
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888034084b00
RBP: ffff888039113058 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: 0000000000000023 R14: 0000000000000023 R15: ffff888034084b00
 bpf_map_update_value+0x7d9/0xff0 kernel/bpf/syscall.c:297
 generic_map_update_batch+0x570/0x860 kernel/bpf/syscall.c:2106
 bpf_map_do_batch+0x66f/0x6d0 kernel/bpf/syscall.c:5798
 __sys_bpf+0x4ce/0x4a30 kernel/bpf/syscall.c:6456
 __do_sys_bpf kernel/bpf/syscall.c:6506 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6503 [inline]
 __x64_sys_bpf+0xce/0x140 kernel/bpf/syscall.c:6503
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc97499e2d9
RSP: 002b:00007fc9757b3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fc974c26270 RCX: 00007fc97499e2d9
RDX: 0000000000000038 RSI: 00002000000000c0 RDI: 000000000000001a
RBP: 00007fc974a35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc974c26308 R14: 00007fc974c26270 R15: 00007ffd9ea406b8
 </TASK>
task:syz-executor    state:R  running task     stack:22088 pid:5595  tgid:5595  ppid:1      task_flags:0x40054c flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_common+0x3c/0xb0 kernel/sched/core.c:7463
 preempt_schedule_thunk+0x16/0x40 arch/x86/entry/thunk.S:12
 __raw_spin_unlock include/linux/spinlock_api_smp.h:201 [inline]
 _raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:213
 spin_unlock include/linux/spinlock.h:401 [inline]
 zap_pte_range mm/memory.c:2095 [inline]
 zap_pmd_range mm/memory.c:2151 [inline]
 zap_pud_range mm/memory.c:2179 [inline]
 zap_p4d_range mm/memory.c:2200 [inline]
 __zap_vma_range+0x16b0/0x48e0 mm/memory.c:2240
 unmap_vmas+0x299/0x5f0 mm/memory.c:2309
 exit_mmap+0x1ef/0xa00 mm/mmap.c:1315
 __mmput+0x12a/0x410 kernel/fork.c:1193
 mmput+0x67/0x80 kernel/fork.c:1216
 exit_mm kernel/exit.c:592 [inline]
 do_exit+0x83b/0x2a50 kernel/exit.c:974
 do_group_exit+0xd5/0x2a0 kernel/exit.c:1129
 get_signal+0x1ec7/0x21e0 kernel/signal.c:3112
 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop+0x139/0x700 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline]
 do_syscall_64+0x661/0x790 arch/x86/entry/syscall_64.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fedcd99d3c7
RSP: 002b:00007ffe23e0b568 EFLAGS: 00000202 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffff RBX: 000000000000199b RCX: 00007fedcd99d3c7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe23e0b620
RBP: 00007ffe23e0b620 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe23e0c710
R13: 00007fedcda34ccb R14: 000055557807c4e8 R15: 0000000000000007
 </TASK>
task:modprobe        state:R  running task     stack:24904 pid:7112  tgid:7112  ppid:6637   task_flags:0x400000 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:instrument_write include/linux/instrumented.h:41 [inline]
RIP: 0010:___set_bit include/asm-generic/bitops/instrumented-non-atomic.h:28 [inline]
RIP: 0010:__update_page_owner_handle+0x2e7/0x530 mm/page_owner.c:286
Code: cc 93 99 fe e8 6a f6 80 ff 48 8b 34 24 48 89 ea 48 89 df e8 6b c8 44 09 be 08 00 00 00 4c 89 ff e8 be 3d f5 ff 49 0f ba 2f 00 <be> 08 00 00 00 4c 89 ff e8 ac 3d f5 ff 49 0f ba 2f 01 49 83 c5 01
RSP: 0000:ffffc90002f373d8 EFLAGS: 00000247
RAX: 0000000000000001 RBX: ffff88801dd440d8 RCX: ffffffff828b5042
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffff88801dd440b0
RBP: 0000000000000009 R08: 0000000000000001 R09: ffffed1003ba8816
R10: ffff88801dd440b7 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000001 R15: ffff88801dd440b0
 __set_page_owner+0x11f/0x540 mm/page_owner.c:360
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x110d/0x35d0 mm/page_alloc.c:3943
 __alloc_frozen_pages_noprof+0x2eb/0x3300 mm/page_alloc.c:5436
 alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486
 folio_alloc_mpol_noprof+0x36/0x260 mm/mempolicy.c:2505
 vma_alloc_folio_noprof+0xed/0x1d0 mm/mempolicy.c:2540
 folio_prealloc mm/memory.c:1291 [inline]
 wp_page_copy mm/memory.c:4007 [inline]
 do_wp_page+0x1b15/0x45c0 mm/memory.c:4472
 handle_pte_fault mm/memory.c:6582 [inline]
 __handle_mm_fault+0x1cd2/0x2f60 mm/memory.c:6707
 handle_mm_fault+0x363/0xa20 mm/memory.c:6876
 do_user_addr_fault+0x59c/0x12f0 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7fc2ea2eb418
RSP: 002b:00007ffd39ed4d80 EFLAGS: 00010206
RAX: 00007fc2e9fd1d50 RBX: 0000000000000030 RCX: 00007fc2e9fdd6f0
RDX: 00007fc2e9fd1e80 RSI: 00007fc2e9f71000 RDI: 000000006fffffff
RBP: 00007ffd39ed4ed0 R08: 0000000000000006 R09: 00000000effffef5
R10: 0000000070000029 R11: 00007ffd39ed4fb8 R12: 00007ffd39ed4c30
R13: 00007fc2e9fdd6b0 R14: 00007ffd39ed4f70 R15: 00007fc2e9fd2018
 </TASK>
task:syz-executor    state:R  running task     stack:23512 pid:5608  tgid:5608  ppid:5591   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:7606
 irqentry_exit_to_kernel_mode_preempt include/linux/irq-entry-common.h:468 [inline]
 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
 irqentry_exit+0x205/0xa10 kernel/entry/common.c:167
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:lock_acquire+0x5e/0x380 kernel/locking/lockdep.c:5947
Code: 05 8f 2e a6 13 83 f8 07 0f 87 da 00 00 00 48 0f a3 05 9e f5 5d 10 0f 82 c9 02 00 00 8b 35 3e 27 5e 10 85 f6 0f 85 c7 00 00 00 <48> 8b 44 24 30 65 48 2b 05 2d 2e a6 13 0f 85 09 03 00 00 48 83 c4
RSP: 0018:ffffc900024d7288 EFLAGS: 00000206
RAX: 0000000000000046 RBX: 0000000000000000 RCX: 0000000000000200
RDX: 0000000000000000 RSI: ffffffff8e3bd2cb RDI: ffffffff8c625580
RBP: ffffffff8fdec5e0 R08: 00000000787873ac R09: 0000000000000007
R10: 0000000000000200 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
 unwind_next_frame+0xd1/0x2090 arch/x86/kernel/unwind_orc.c:495
 arch_stack_walk+0x94/0xf0 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
 save_stack+0x162/0x1e0 mm/page_owner.c:183
 __reset_page_owner+0x84/0x190 mm/page_owner.c:338
 reset_page_owner include/linux/page_owner.h:26 [inline]
 __free_pages_prepare mm/page_alloc.c:1418 [inline]
 free_unref_folios+0xa4a/0x1790 mm/page_alloc.c:3022
 folios_put_refs+0x585/0xaa0 mm/folio.c:1036
 folio_batch_release include/linux/folio_batch.h:101 [inline]
 shmem_undo_range+0x5e5/0x1570 mm/shmem.c:1161
 shmem_truncate_range mm/shmem.c:1289 [inline]
 shmem_evict_inode+0x3b1/0xca0 mm/shmem.c:1420
 evict+0x3c2/0xad0 fs/inode.c:822
 iput_final fs/inode.c:2014 [inline]
 iput.part.0+0x989/0x1050 fs/inode.c:2063
 iput+0x35/0x40 fs/inode.c:2029
 filename_unlinkat+0x466/0x730 fs/namei.c:5752
 __do_sys_unlink fs/namei.c:5783 [inline]
 __se_sys_unlink fs/namei.c:5780 [inline]
 __x64_sys_unlink+0x46/0x70 fs/namei.c:5780
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe51819d3c7
RSP: 002b:00007ffec4992818 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe51819d3c7
RDX: 00007ffec4992840 RSI: 00007ffec49928d0 RDI: 00007ffec49928d0
RBP: 00007ffec49928d0 R08: 00007ffec49938d0 R09: 00000000ffffffff
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffec4993960
R13: 00007fe518234ccb R14: 0000000000028e97 R15: 00007ffec49939a0
 </TASK>
rcu: rcu_preempt kthread starved for 10503 jiffies! g20997 f0x0 RCU_GP_WAIT_FQS(5) ->state=R ->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:28984 pid:17    tgid:17    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x1259/0x6920 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0xdd/0x2c0 kernel/sched/core.c:7376
 schedule_timeout+0x127/0x280 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1a9/0x8f0 kernel/rcu/tree.c:2122
 rcu_gp_kthread+0x17a/0x220 kernel/rcu/tree.c:2330
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7118 Comm: syz.3.337 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:hlock_class kernel/locking/lockdep.c:234 [inline]
RIP: 0010:__lock_acquire+0x720/0x1f40 kernel/locking/lockdep.c:5285
Code: 8b 54 24 18 8b 05 e0 3f 5e 10 85 c0 75 3d 45 85 d2 0f 85 e1 09 00 00 0f b7 43 20 66 25 ff 1f 0f b7 c0 48 0f a3 05 60 10 ab 15 <0f> 83 29 0b 00 00 48 8d 04 80 48 8d 04 80 48 8d 04 c5 a0 6d 92 97
RSP: 0018:ffffc90000a18c90 EFLAGS: 00000003
RAX: 0000000000000007 RBX: ffff888032d30c00 RCX: 0000000000000200
RDX: 0ac0d5affe09d4ff RSI: 0000000095481a34 RDI: 0000000086db7919
RBP: 0000000000000007 R08: 00000000ef9d33e4 R09: 0000000000000007
R10: 0000000000000002 R11: 0000000000000001 R12: ffff888032d30000
R13: 0000000000020000 R14: 0000000000000003 R15: 0ac0d5affe09d4ff
FS:  00007f04d39de6c0(0000) GS:ffff888122a46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f04d2b87900 CR3: 000000005854e000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 lock_acquire kernel/locking/lockdep.c:5942 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5899
 rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 rcu_read_lock include/linux/rcupdate.h:849 [inline]
 advance_sched+0x718/0xd20 net/sched/sch_taprio.c:993
 __run_hrtimer kernel/time/hrtimer.c:2074 [inline]
 __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2131
 hrtimer_interrupt+0x441/0xaa0 kernel/time/hrtimer.c:2250
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline]
 __sysvec_apic_timer_interrupt+0x109/0x470 arch/x86/kernel/apic/apic.c:1068
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:221
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 b6 1a 10 f6 48 89 df e8 3e 71 10 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 55 54 ff f5 65 48 83 3d b4 43 b6 09 00 74 16 5b
RSP: 0018:ffffc9000954ea80 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff8fdf7d80 RCX: 0000000000000040
RDX: 0000000000000001 RSI: ffffffff8e3e3486 RDI: ffffffff8c625580
RBP: 0000000000000246 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 1ffffffff1fbefc9 R12: ffffffff8fdf7e58
R13: ffff888034084fd0 R14: ffffffff8fdf7d80 R15: ffff888032d30000
 rcu_preempt_deferred_qs_irqrestore+0x4fd/0xb90 kernel/rcu/tree_plugin.h:573
 rcu_read_unlock_special kernel/rcu/tree_plugin.h:798 [inline]
 __rcu_read_unlock+0x27f/0x5e0 kernel/rcu/tree_plugin.h:438
 get_obj_cgroup_from_memcg mm/memcontrol.c:2994 [inline]
 charge_memcg+0x7e/0x210 mm/memcontrol.c:5207
 __mem_cgroup_charge+0x2b/0x1c0 mm/memcontrol.c:5227
 mem_cgroup_charge include/linux/memcontrol.h:662 [inline]
 shmem_alloc_and_add_folio+0x451/0xd40 mm/shmem.c:1988
 shmem_get_folio_gfp+0x75b/0x1980 mm/shmem.c:2531
 shmem_get_folio mm/shmem.c:2637 [inline]
 shmem_write_begin+0x1a4/0x420 mm/shmem.c:3268
 generic_perform_write+0x292/0xa40 mm/filemap.c:4374
 shmem_file_write_iter+0x10e/0x140 mm/shmem.c:3443
 __kernel_write_iter+0x2ac/0x930 fs/read_write.c:621
 dump_emit_page fs/coredump.c:1293 [inline]
 dump_user_range+0x3f9/0xad0 fs/coredump.c:1367
 elf_core_dump+0x2d68/0x3d20 fs/binfmt_elf.c:2106
 coredump_write fs/coredump.c:1047 [inline]
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x281a/0x54a0 fs/coredump.c:1195
 get_signal+0x1f2a/0x21e0 kernel/signal.c:3097
 arch_do_signal_or_restart+0x91/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:101 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
 irqentry_exit+0x402/0xa10 kernel/entry/common.c:165
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f04d2b9e2e1
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:fffffffffffffe70 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f04d2e26090 RCX: 00007f04d2b9e2d9
RDX: 0000000000000000 RSI: fffffffffffffe70 RDI: 0000000000008000
RBP: 00007f04d2c35888 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f04d2e26128 R14: 00007f04d2e26090 R15: 00007ffe632b18b8
 </TASK>