rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2678 jiffies s: 39589 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11362 Comm: syz.7.1918 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:preempt_count_sub+0x1/0x160 kernel/sched/core.c:5732
Code: c7 c1 e8 a9 1f 8e 80 e1 07 80 c1 03 38 c1 0f 8c 6e ff ff ff 48 c7 c7 e8 a9 1f 8e e8 89 3b 79 00 89 df e9 5b ff ff ff 66 90 55 <53> 48 bb 00 00 00 00 00 fc ff df 48 c7 c0 40 91 be 96 48 c1 e8 03
RSP: 0018:ffffc90000006e38 EFLAGS: 00000002
RAX: ffffc90000008000 RBX: ffffc90000006f80 RCX: ffffc90000007af8
RDX: ffffc90000006f01 RSI: dffffc0000000000 RDI: 0000000000000001
RBP: ffffffff8eaa0bf8 R08: ffffc90000007ae0 R09: ffffc90000006fd0
R10: fffff52000000dfc R11: 1ffff92000000dfa R12: ffffc90000000000
R13: dffffc0000000000 R14: ffffc90000006f90 R15: ffffc90000007af0
FS:  00007fa5940e36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000057f01000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x1880/0x20b0 arch/x86/kernel/unwind_orc.c:629
 perf_callchain_kernel+0x461/0x5c0 arch/x86/events/core.c:2805
 get_perf_callchain+0x376/0x480 kernel/events/callchain.c:200
 perf_callchain kernel/events/core.c:7512 [inline]
 perf_prepare_sample+0x399/0x2040 kernel/events/core.c:7545
 __perf_event_output kernel/events/core.c:7730 [inline]
 perf_event_output_forward+0x163/0x2a0 kernel/events/core.c:7750
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10029
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0xd3/0x140 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x24/0x40 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 2d 97 96 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc90000007880 EFLAGS: 00000206
RAX: 484932dce3a12300 RBX: 1ffff92000000f18 RCX: 484932dce3a12300
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefca0
RBP: ffffc90000007968 R08: dffffc0000000000 R09: ffffed10171c6afa
R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 get_mem_cgroup_from_objcg+0x12d/0x150 include/linux/memcontrol.h:525
 obj_cgroup_uncharge_pages mm/memcontrol.c:3075 [inline]
 refill_obj_stock+0x3dd/0x680 mm/memcontrol.c:3350
 memcg_slab_free_hook+0x125/0x1f0 mm/slab.h:569
 slab_free mm/slub.c:3682 [inline]
 kmem_cache_free+0xe0/0x290 mm/slub.c:3709
 rcu_do_batch kernel/rcu/tree.c:2297 [inline]
 rcu_core+0x9c0/0x16a0 kernel/rcu/tree.c:2557
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:finish_task_switch+0x272/0x8f0 kernel/sched/core.c:5123
Code: db 0f 85 5a 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 70 e0 c8 08 e8 2b b3 2e 00 fb 4c 8b 65 c0 49 8d bc 24 f8 15 00 00 <48> 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 de 02 00 00 41 80
RSP: 0018:ffffc9000e467858 EFLAGS: 00000282
RAX: 484932dce3a12300 RBX: 0000000000000000 RCX: 484932dce3a12300
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffff888078f595f8
RBP: ffffc9000e4678b0 R08: dffffc0000000000 R09: ffffed10171c6afa
R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: ffff888078f58000
R13: dffffc0000000000 R14: ffff88801a713b80 R15: ffff8880b8e3b590
 context_switch kernel/sched/core.c:5247 [inline]
 __schedule+0x10f4/0x40b0 kernel/sched/core.c:6561
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6730
 preempt_schedule+0xa7/0xb0 kernel/sched/core.c:6754
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
 try_to_wake_up+0x6ae/0x1080 kernel/sched/core.c:4233
 wake_up_process kernel/sched/core.c:4361 [inline]
 wake_up_q+0x78/0xc0 kernel/sched/core.c:1009
 futex_wake+0x409/0x4b0 kernel/futex/waitwake.c:184
 do_futex+0x2e2/0x320 kernel/futex/syscalls.c:111
 __do_sys_futex kernel/futex/syscalls.c:183 [inline]
 __se_sys_futex+0x14a/0x440 kernel/futex/syscalls.c:164
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa59318eba9
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:00007fa5940e30e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007fa5933d5fa8 RCX: 00007fa59318eba9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa5933d5fac
RBP: 00007fa5933d5fa0 R08: 003318d394701150 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa5933d6038 R14: 00007ffd15608bb0 R15: 00007ffd15608c98
 </TASK>