rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 1-...!: (0 ticks this GP) idle=5f0c/1/0x4000000000000000 softirq=28090/28090 fqs=0 rcu: (detected by 0, t=10502 jiffies, g=44805, q=288 ncpus=2) Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10328 Comm: syz-executor.1 Not tainted 6.9.0-rc3-next-20240409-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4628 [inline] RIP: 0010:__lock_acquire+0xd66/0x1fd0 kernel/locking/lockdep.c:5121 Code: 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 22 0d 00 00 8b 1b 48 8b 44 24 20 0f b6 04 38 84 c0 0f 85 36 0d 00 00 48 8b 44 24 10 33 18 c3 00 60 00 00 74 0d 41 be 01 00 00 00 49 c7 c4 ff ff ff ff 4d RSP: 0018:ffffc90000a187f0 EFLAGS: 00000002 RAX: ffff88802146a978 RBX: 000000000000806b RCX: ffff88802146a8e0 RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 RBP: ffff88802146a958 R08: ffffffff92f6c5a7 R09: 1ffffffff25ed8b4 R10: dffffc0000000000 R11: fffffbfff25ed8b5 R12: 3be9ba32c8301548 R13: ffff888021469e00 R14: 0000000000000000 R15: ffff88802146a978 FS: 00007fbb9cacc6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cc23000 CR3: 0000000024e64000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5754 debug_objects_fill_pool+0x9f/0x9b0 lib/debugobjects.c:614 debug_object_activate+0x135/0x510 lib/debugobjects.c:704 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline] debug_activate kernel/time/hrtimer.c:478 [inline] enqueue_hrtimer+0x30/0x3c0 kernel/time/hrtimer.c:1090 __run_hrtimer kernel/time/hrtimer.c:1709 [inline] __hrtimer_run_queues+0x6d5/0xd50 kernel/time/hrtimer.c:1756 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818 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:try_charge_memcg+0x4fd/0x18a0 mm/memcontrol.c:2748 Code: 42 0f b6 04 2b 84 c0 0f 85 28 0c 00 00 45 89 3e 41 b7 01 e9 cd fe ff ff e8 60 b5 7f 09 41 f7 c6 00 02 00 00 74 d0 fb 45 84 ff <0f> 85 84 0f 00 00 e9 69 0d 00 00 44 8b 74 24 0c 4c 8d bc 24 b0 01 RSP: 0018:ffffc90012a7f520 EFLAGS: 00000202 RAX: 5af0a899dacaea00 RBX: 1ffff9200254fed2 RCX: ffffffff8173045a RDX: dffffc0000000000 RSI: ffffffff8bcad7c0 RDI: ffffc90012a7f690 RBP: ffffc90012a7f780 R08: ffffffff92f6c647 R09: 1ffffffff25ed8c8 R10: dffffc0000000000 R11: fffffbfff25ed8c9 R12: ffff888021469e00 R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001 try_charge mm/memcontrol.c:2935 [inline] charge_memcg+0xa2/0x160 mm/memcontrol.c:7364 __mem_cgroup_charge+0x27/0x80 mm/memcontrol.c:7379 mem_cgroup_charge include/linux/memcontrol.h:708 [inline] shmem_alloc_and_add_folio+0x394/0xdb0 mm/shmem.c:1683 shmem_get_folio_gfp+0x82d/0x1f50 mm/shmem.c:2061 shmem_get_folio mm/shmem.c:2166 [inline] shmem_write_begin+0x170/0x4d0 mm/shmem.c:2749 generic_perform_write+0x322/0x640 mm/filemap.c:4009 shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2925 call_write_iter include/linux/fs.h:2106 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x72/0x7a RIP: 0033:0x7fbb9bc7cbaf Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48 RSP: 002b:00007fbb9cacbe80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007fbb9bc7cbaf RDX: 0000000001000000 RSI: 00007fbb91a00000 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000096c9 R10: 000000002001c342 R11: 0000000000000293 R12: 0000000000000003 R13: 00007fbb9cacbf80 R14: 00007fbb9cacbf40 R15: 00007fbb91a00000 rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g44805 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 rcu: Possible timer handling issue on cpu=1 timer-softirq=23197 rcu: rcu_preempt kthread starved for 10502 jiffies! g44805 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:24344 pid:17 tgid:17 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5409 [inline] __schedule+0x17e8/0x4a50 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:2030 rcu_gp_kthread+0xa7/0x3b0 kernel/rcu/tree.c:2232 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:243