rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2692 jiffies s: 186477 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: 11264 Comm: syz.3.12421 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x2a/0x60 kernel/kcov.c:216
Code: 48 8b 04 24 65 48 8b 0d 24 4e 80 7e 65 8b 15 25 4e 80 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 <74> 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b
RSP: 0018:ffffc900000072b8 EFLAGS: 00000046
RAX: ffffffff81a5452f RBX: 0000000000000103 RCX: ffff88802b5cbc00
RDX: 0000000000000100 RSI: 0000000000000103 RDI: 0000000000000000
RBP: ffffc90000007548 R08: ffff8880b8e35558 R09: ffffe8ffffc35ae8
R10: dffffc0000000000 R11: ffffed10171c6b02 R12: dffffc0000000000
R13: 0000000000000014 R14: ffffe8ffffc35ae8 R15: ffffc90000007480
FS:  00007fcdaf0ae6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000061cb8000 CR4: 00000000003506f0
DR0: fffffffffffffffc DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_tp_event+0x15f/0xc10 kernel/events/core.c:10047
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032
 perf_trace_preemptirq_template+0x268/0x320 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+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 82 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007780 EFLAGS: 00000206
RAX: cac78c4a0ff87b00 RBX: 1ffff92000000ef8 RCX: cac78c4a0ff87b00
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adee1a0
RBP: ffffc90000007880 R08: ffffffff90af22df R09: 1ffffffff215e45b
R10: dffffc0000000000 R11: fffffbfff215e45c R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 netif_receive_skb_list_internal+0xa11/0xca0 net/core/dev.c:5854
 gro_normal_list include/net/gro.h:433 [inline]
 napi_complete_done+0x37e/0x850 net/core/dev.c:6194
 virtqueue_napi_complete drivers/net/virtio_net.c:403 [inline]
 virtnet_poll+0x9a8/0x1150 drivers/net/virtio_net.c:1717
 __napi_poll+0xbb/0x460 net/core/dev.c:6628
 napi_poll net/core/dev.c:6695 [inline]
 net_rx_action+0x622/0xbc0 net/core/dev.c:6809
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 common_interrupt+0xb5/0xd0 arch/x86/kernel/irq.c:242
 </IRQ>
 <TASK>
 asm_common_interrupt+0x22/0x40 arch/x86/include/asm/idtentry.h:682
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xbc/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> ef cb 23 f7 65 8b 05 f0 7c cd 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900034c71a0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a02 RCX: cac78c4a0ff87b00
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 0000000000000001
RBP: ffffc900034c7230 R08: ffffffff90af22df R09: 1ffffffff215e45b
R10: dffffc0000000000 R11: fffffbfff215e45c R12: dffffc0000000000
R13: ffff8880252f33b8 R14: ffffffff96e15290 R15: 1ffff92000698e34
 debug_object_activate+0x2f8/0x4f0 lib/debugobjects.c:716
 debug_rcu_head_queue kernel/rcu/rcu.h:190 [inline]
 call_rcu+0xa2/0x950 kernel/rcu/tree.c:2834
 context_switch kernel/sched/core.c:5248 [inline]
 __schedule+0x1087/0x4030 kernel/sched/core.c:6562
 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6874
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:memcg_list_lru_alloc+0x0/0xb00 mm/list_lru.c:474
Code: 5c 41 5d 41 5e 41 5f 5d e9 7d ed 76 08 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 00 f8 ff ff 48 89 df e8 45 6f 16 00 e9 f3 f7 ff ff <55> 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 00 01
RSP: 0018:ffffc900034c76f0 EFLAGS: 00000246
RAX: cac78c4a0ff87b00 RBX: ffff88807c332000 RCX: cac78c4a0ff87b00
RDX: 0000000000000cc0 RSI: ffff8880749827f0 RDI: ffff88807c332000
RBP: 0000000000000cc0 R08: ffffffff8e200f6f R09: 1ffffffff1c401ed
R10: dffffc0000000000 R11: fffffbfff1c401ee R12: ffff8880749827f0
R13: ffff88802799cf00 R14: ffff888140009780 R15: 0000000000000001
 memcg_slab_pre_alloc_hook mm/slab.h:494 [inline]
 slab_pre_alloc_hook+0x2ad/0x300 mm/slab.h:715
 slab_alloc_node mm/slub.c:3279 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc_lru+0x49/0x2e0 mm/slub.c:3390
 __d_alloc+0x2e/0x6e0 fs/dcache.c:1774
 d_alloc fs/dcache.c:1854 [inline]
 d_alloc_parallel+0xdc/0x1590 fs/dcache.c:2647
 lookup_open fs/namei.c:3415 [inline]
 open_last_lookups fs/namei.c:3558 [inline]
 path_openat+0x949/0x2f10 fs/namei.c:3788
 do_filp_open+0x1ee/0x420 fs/namei.c:3818
 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320
 do_sys_open fs/open.c:1336 [inline]
 __do_sys_openat fs/open.c:1352 [inline]
 __se_sys_openat fs/open.c:1347 [inline]
 __x64_sys_openat+0x135/0x160 fs/open.c:1347
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcdae15d68e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fcdaf0adec8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fcdaf0ae6c0 RCX: 00007fcdae15d68e
RDX: 0000000000000002 RSI: 00007fcdaf0adf90 RDI: ffffffffffffff9c
RBP: 00007fcdae232e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcdae416038 R14: 00007fcdae415fa0 R15: 00007ffc426e75c8
 </TASK>