rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5096/1:b..l P5201/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=6901, q=864 ncpus=2)
task:syz-executor.2 state:R running task stack:24664 pid:5201 tgid:5201 ppid:5093 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 aa 95 84 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc90004207380 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92000840e7c RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8bcaca20 RDI: ffffffff8c1eb160
RBP: ffffc900042074d0 R08: ffffffff92efb507 R09: 1ffffffff25df6a0
R10: dffffc0000000000 R11: fffffbfff25df6a1 R12: 1ffff92000840e78
R13: dffffc0000000000 R14: ffffc900042073e0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
percpu_ref_put_many include/linux/percpu-refcount.h:330 [inline]
percpu_ref_put+0x36/0x180 include/linux/percpu-refcount.h:351
__mem_cgroup_uncharge_folios+0xdf/0x1c0 mm/memcontrol.c:7523
mem_cgroup_uncharge_folios include/linux/memcontrol.h:721 [inline]
folios_put_refs+0x8e3/0xa10 mm/swap.c:1033
free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
exit_mmap+0x4bb/0xd60 mm/mmap.c:3280
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ffa47dea9
RSP: 002b:00007ffd509f9058 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f1ffa47dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f1ffa400000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001
task:udevd state:R running task stack:24824 pid:5096 tgid:5096 ppid:4525 flags:0x00000002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
preempt_schedule_irq+0xfb/0x1c0 kernel/sched/core.c:7068
irqentry_exit+0x5e/0x90 kernel/entry/common.c:354
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:707
RIP: 0010:lock_acquire+0x84/0x550 kernel/locking/lockdep.c:5722
Code: 41 48 c7 44 24 48 91 14 af 8d 48 c7 44 24 50 e0 79 72 81 4c 8d 64 24 40 49 c1 ec 03 48 b8 f1 f1 f1 f1 00 f2 f2 f2 4b 89 04 2c <43> c7 44 2c 09 f2 f2 f2 00 43 c7 44 2c 11 f3 f3 f3 f3 66 43 c7 44
RSP: 0018:ffffc9000376f620 EFLAGS: 00000a06
RAX: f2f2f200f1f1f1f1 RBX: 000000000000000c RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e334d20
RBP: ffffc9000376f780 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: ffff888025631e00 R12: 1ffff920006edecc
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880249e85e0
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
__d_lookup+0xa2/0x7e0 fs/dcache.c:2305
lookup_fast+0x74/0x4a0 fs/namei.c:1650
walk_component fs/namei.c:2000 [inline]
link_path_walk+0x60b/0xea0 fs/namei.c:2331
path_lookupat+0xa9/0x450 fs/namei.c:2484
filename_lookup+0x256/0x610 fs/namei.c:2514
vfs_statx+0x105/0x4e0 fs/stat.c:244
vfs_fstatat+0x135/0x190 fs/stat.c:304
__do_sys_newfstatat fs/stat.c:468 [inline]
__se_sys_newfstatat fs/stat.c:462 [inline]
__x64_sys_newfstatat+0x117/0x190 fs/stat.c:462
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6ed77165f4
RSP: 002b:00007ffc2ce39058 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000563aaf67fe10 RCX: 00007f6ed77165f4
RDX: 00007ffc2ce39068 RSI: 00007ffc2ce390f8 RDI: 00000000ffffff9c
RBP: 0000563aaf68737f R08: 0000563aaf68737f R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 0000000000000000
R13: 0000563aaf67ff00 R14: 00007ffc2ce390f8 R15: 0000563a9dbb4160
rcu: rcu_preempt kthread starved for 10580 jiffies! g6901 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:26256 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_timeout+0x1be/0x310 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x2df/0x1370 kernel/rcu/tree.c:1663
rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:1862
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5209 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00007-g4d2008430ce8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_apic_msr_write+0x3b/0x50 arch/x86/include/asm/apic.h:209
Code: 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 66 90 cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 13 db a0 03 0f 1f 00 90
RSP: 0018:ffffc90000007e68 EFLAGS: 00000046
RAX: 000000000001f376 RBX: 0000000000000020 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000001f376 RDI: 0000000000000838
RBP: 000000000001f376 R08: ffffffff8186b879 R09: 1ffffffff1f4f6bd
R10: dffffc0000000000 R11: ffffffff813ea030 R12: 00000000001f369a
R13: dffffc0000000000 R14: 0000000010006804 R15: ffff8880b9428340
FS: 00007fb4857ff6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb4857fef00 CR3: 000000001c302000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
apic_write arch/x86/include/asm/apic.h:409 [inline]
lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:415
clockevents_program_event+0x1c1/0x350 kernel/time/clockevents.c:334
hrtimer_interrupt+0x54a/0x990 kernel/time/hrtimer.c:1831
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fa db f0 f5 48 89 df e8 12 1c f2 f5 e8 ed 78 1b f6 fb bf 01 00 00 00 d2 e1 e3 f5 65 8b 05 f3 0e 82 74 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc900044c7c70 EFLAGS: 00000282
RAX: 5e1f7efc9dd27700 RBX: ffff888022c63780 RCX: ffffffff946f3603
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc900044c7db0 R08: ffffffff8fa7b5ef R09: 1ffffffff1f4f6bd
R10: dffffc0000000000 R11: fffffbfff1f4f6be R12: 0000000000000021
R13: 1ffff1100458c783 R14: ffff888022c63c18 R15: ffff888022c63780
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x14dd/0x1740 kernel/signal.c:2914
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb485c7dea7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007fb4857ff0c8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007fb485dabf80 RCX: 00007fb485c7dea9
RDX: 0000000000000000 RSI: 0000800000000006 RDI: 0000000020001300
RBP: 00007fb485cca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb485dabf80 R15: 00007fffaf6e22c8
sched: RT throttling activated