syzbot

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P9350 0-.... } 2661 jiffies s: 15129 root: 0x1/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9350 Comm: syz.0.1719 Not tainted 6.1.147-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_irq_work_raise+0x2/0xd0 arch/x86/kernel/irq_work.c:27
Code: dd 20 00 5c 48 c7 c7 80 58 86 8a e8 88 a8 e8 08 65 c6 05 20 e0 d4 7e 00 5b 41 5e c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 56 <53> 49 be 00 00 00 00 00 fc ff df 48 c7 c0 f8 43 1f 8e 48 c1 e8 03
RSP: 0018:ffffc900000075d8 EFLAGS: 00000046
RAX: ffffffff818cfd56 RBX: ffff8880b8e3b970 RCX: ffff888030acd940
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffff52000000ea9
R10: fffff52000000ea9 R11: 1ffff92000000ea8 R12: 0000000000000000
R13: dffffc0000000001 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f0bd72ca6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c27f010 CR3: 000000002412d000 CR4: 00000000003506f0
DR0: 0000200000000280 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 irq_work_queue_on+0x13c/0x260 kernel/irq_work.c:165
 rcu_read_unlock_special+0x3c7/0x500 kernel/rcu/tree_plugin.h:675
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 __perf_event_output kernel/events/core.c:7727 [inline]
 perf_event_output_forward+0x237/0x2a0 kernel/events/core.c:7736
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9482
 perf_swevent_overflow kernel/events/core.c:9558 [inline]
 perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9596
 perf_tp_event+0x335/0xb60 kernel/events/core.c:10015
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:9988
 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:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1c8/0x920 kernel/softirq.c:584
Code: 89 7c 24 44 0f b7 db 48 c7 c7 80 fa 8a 8a e8 9f d3 c7 08 65 66 c7 05 d5 3b b5 7e 00 00 e8 90 be 38 00 fb 49 c7 c6 c0 a0 80 8c <89> 5c 24 4c b8 ff ff ff ff 0f bc 44 24 4c 41 89 c5 41 ff c5 0f 84
RSP: 0018:ffffc90000007e00 EFLAGS: 00000286
RAX: ee9d3a6b3fe7a100 RBX: 0000000000000200 RCX: ee9d3a6b3fe7a100
RDX: dffffc0000000000 RSI: ffffffff8a8c0460 RDI: ffffffff8adef320
RBP: ffffc90000007f30 R08: dffffc0000000000 R09: ffffed10171c6af6
R10: ffffed10171c6af6 R11: 1ffff110171c6af5 R12: dffffc0000000000
R13: 0000000000000000 R14: ffffffff8c80a0c0 R15: 000000000000000a
 __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:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:rcu_read_unlock_special+0xcc/0x500 kernel/rcu/tree_plugin.h:637
Code: 00 65 48 8b 04 25 28 00 00 00 48 3b 84 24 a0 00 00 00 0f 85 7f 03 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 49 89 ff <48> c7 84 24 80 00 00 00 00 00 00 00 9c 8f 84 24 80 00 00 00 4c 8b
RSP: 0018:ffffc9000c9df8e0 EFLAGS: 00000246
RAX: f2f2f200f1f1f1f1 RBX: 1ffff9200193bf24 RCX: 0000000000080000
RDX: ffffc900059b9000 RSI: 000000000007d965 RDI: ffff888030acd940
RBP: ffffc9000c9df9d8 R08: dffffc0000000000 R09: ffffed10033c1710
R10: ffffed10033c1710 R11: 1ffff110033c170f R12: 1ffff11006159baf
R13: dffffc0000000000 R14: 0000000080000000 R15: ffff888030acd940
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 page_ext_put+0x91/0xb0 mm/page_ext.c:182
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1459 [inline]
 free_pcp_prepare mm/page_alloc.c:1509 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3479
 free_slab mm/slub.c:2031 [inline]
 discard_slab mm/slub.c:2037 [inline]
 __unfreeze_partials+0x1a5/0x200 mm/slub.c:2586
 put_cpu_partial+0x17c/0x250 mm/slub.c:2662
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0x76/0xe0 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x144/0x160 mm/kasan/quarantine.c:294
 ____kasan_kmalloc mm/kasan/common.c:340 [inline]
 __kasan_kmalloc+0x1e/0xa0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc+0xb0/0x240 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 bpf_test_init net/bpf/test_run.c:775 [inline]
 bpf_prog_test_run_skb+0x22b/0x11b0 net/bpf/test_run.c:1100
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3685
 __sys_bpf+0x593/0x6d0 kernel/bpf/syscall.c:5038
 __do_sys_bpf kernel/bpf/syscall.c:5124 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5122 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5122
 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: 0033:0x7f0bd638e9a9
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:00007f0bd72ca038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f0bd65b5fa0 RCX: 00007f0bd638e9a9
RDX: 0000000000000048 RSI: 0000200000000080 RDI: 000000000000000a
RBP: 00007f0bd6410d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0bd65b5fa0 R15: 00007ffefe919ef8
 </TASK>