rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2631 jiffies s: 129821 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25317 Comm: syz.2.6772 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:unwind_next_frame+0x125/0x20b0 arch/x86/kernel/unwind_orc.c:448
Code: f7 e8 5f 66 9a 00 41 f6 06 03 0f 85 bb 17 00 00 4c 8d 73 35 4c 89 f0 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 48 89 44 24 78 <42> 0f b6 04 28 84 c0 0f 85 25 19 00 00 4c 89 b4 24 80 00 00 00 45
RSP: 0018:ffffc900001dec68 EFLAGS: 00000803
RAX: 1ffff9200003bdba RBX: ffffc900001deda0 RCX: ffffffff96c00103
RDX: 000000000000000a RSI: dffffc0000000000 RDI: 0000000000000001
RBP: ffffc900001dede8 R08: ffffc900001df9c0 R09: ffffc900001dedf0
R10: dffffc0000000000 R11: fffff5200003bdc0 R12: ffffffff81d3583b
R13: dffffc0000000000 R14: ffffc900001dedd5 R15: ffffc900001dedf0
FS:  00007f96ac1766c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000270ee000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 perf_callchain_kernel+0x42a/0x680 arch/x86/events/core.c:2805
 get_perf_callchain+0x236/0x490 kernel/events/callchain.c:204
 perf_callchain kernel/events/core.c:7512 [inline]
 perf_prepare_sample+0x399/0x2020 kernel/events/core.c:7545
 __perf_event_output kernel/events/core.c:7730 [inline]
 perf_event_output_forward+0x197/0x2f0 kernel/events/core.c:7750
 __perf_event_overflow+0x448/0x610 kernel/events/core.c:9496
 perf_swevent_overflow kernel/events/core.c:9579 [inline]
 perf_swevent_event+0x315/0x570 kernel/events/core.c:9630
 perf_tp_event+0x3e7/0xc30 kernel/events/core.c:10064
 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_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:kasan_check_range+0x1b2/0x290 mm/kasan/generic.c:-1
Code: 01 f3 49 89 df 49 8d 5f 07 4d 85 ff 49 0f 49 df 48 83 e3 f8 49 29 df 74 0e 41 80 3b 00 75 69 49 ff c3 49 ff cf 75 f2 5b 41 5c <41> 5e 41 5f 5d c3 45 84 ff 0f 85 91 00 00 00 41 f7 c7 00 ff 00 00
RSP: 0018:ffffc900001df770 EFLAGS: 00000256
RAX: 0000000000000001 RBX: 0000000000000010 RCX: ffffffff813925ba
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900001df8d8
RBP: 0000000000000000 R08: ffffc900001df8e7 R09: 1ffff9200003bf1c
R10: dffffc0000000000 R11: fffff5200003bf1d R12: 1ffff9200003bf12
R13: dffffc0000000000 R14: 1ffff9200003bf1b R15: 0000000000000002
 memset+0x1e/0x40 mm/kasan/shadow.c:44
 unwind_next_frame+0xb8a/0x20b0 arch/x86/kernel/unwind_orc.c:546
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 __kasan_slab_alloc+0x6b/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x4b/0x480 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x123/0x2f0 mm/slub.c:3383
 skb_clone+0x1e7/0x370 net/core/skbuff.c:1660
 dev_queue_xmit_nit+0x249/0xbb0 net/core/dev.c:2334
 xmit_one net/core/dev.c:3691 [inline]
 dev_hard_start_xmit+0x154/0x870 net/core/dev.c:3711
 sch_direct_xmit+0x25a/0x4b0 net/sched/sch_generic.c:345
 __dev_xmit_skb net/core/dev.c:3932 [inline]
 __dev_queue_xmit+0x1771/0x37c0 net/core/dev.c:4337
 NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:-1
 arp_xmit+0x168/0x260 net/ipv4/arp.c:664
 arp_process+0x1405/0x1880 net/ipv4/arp.c:854
 NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:-1
 __netif_receive_skb_list_ptype net/core/dev.c:5667 [inline]
 __netif_receive_skb_list_core+0x6e6/0x750 net/core/dev.c:5710
 __netif_receive_skb_list net/core/dev.c:5762 [inline]
 netif_receive_skb_list_internal+0x93f/0xca0 net/core/dev.c:5853
 gro_normal_list include/net/gro.h:433 [inline]
 gro_normal_one include/net/gro.h:446 [inline]
 napi_skb_finish net/core/gro.c:628 [inline]
 napi_gro_receive+0x4f3/0xb60 net/core/gro.c:658
 receive_buf+0x211b/0x4ed0 drivers/net/virtio_net.c:1327
 virtnet_receive drivers/net/virtio_net.c:1592 [inline]
 virtnet_poll+0x5d3/0x1180 drivers/net/virtio_net.c:1710
 __napi_poll+0xc0/0x460 net/core/dev.c:6628
 napi_poll net/core/dev.c:6695 [inline]
 net_rx_action+0x5dd/0xb20 net/core/dev.c:6809
 handle_softirqs+0x2a1/0x930 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
 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:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6874
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 15 64 22 f7 e8 10 58 52 f7 fb bf 01 00 00 00 <e8> 75 b9 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000c79faa0 EFLAGS: 00000286
RAX: e9223e460f864000 RBX: 0000000000000000 RCX: e9223e460f864000
RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: 0000000000000001
RBP: ffffc9000c79fb40 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920018f3f54
 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:lock_acquire+0x225/0x4a0 kernel/locking/lockdep.c:5666
Code: f7 84 24 80 00 00 00 00 02 00 00 43 c6 44 3d 04 f8 0f 85 f0 00 00 00 41 f7 c6 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 44 3d 00 00 00 00 00 43 c7 44 3d 08 00 00 00 00 65 48 8b 04
RSP: 0018:ffffc9000c79fc00 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: e9223e460f864000
RDX: 0000000000000000 RSI: ffffffff8a8c22a0 RDI: ffffffff8adf1320
RBP: ffffc9000c79fd18 R08: dffffc0000000000 R09: 1ffffffff215f248
R10: dffffc0000000000 R11: fffffbfff215f249 R12: 0000000000000001
R13: 1ffff920018f3f8c R14: 0000000000000246 R15: dffffc0000000000
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 get_obj_cgroup_from_current+0xec/0x280 mm/memcontrol.c:3019
 memcg_slab_pre_alloc_hook mm/slab.h:485 [inline]
 slab_pre_alloc_hook+0x91/0x310 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
 alloc_inode_sb include/linux/fs.h:3245 [inline]
 sock_alloc_inode+0x24/0xc0 net/socket.c:306
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x5f/0x1c0 fs/inode.c:1063
 sock_alloc net/socket.c:631 [inline]
 __sock_create+0x129/0x940 net/socket.c:1513
 sock_create net/socket.c:1605 [inline]
 __sys_socket_create net/socket.c:1642 [inline]
 __sys_socket+0xc4/0x190 net/socket.c:1670
 __do_sys_socket net/socket.c:1683 [inline]
 __se_sys_socket net/socket.c:1681 [inline]
 __x64_sys_socket+0x76/0x80 net/socket.c:1681
 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: 0033:0x7f96ab39ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f96ac176028 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 00007f96ab615fa0 RCX: 00007f96ab39ce59
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 000000000000000a
RBP: 00007f96ab432d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f96ab616038 R14: 00007f96ab615fa0 R15: 00007fff2da90748
 </TASK>