rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (799 ticks this GP) idle=094c/1/0x4000000000000000 softirq=10444/10445 fqs=17
rcu: 	(t=10500 jiffies g=8901 q=676 ncpus=2)
rcu: rcu_preempt kthread starved for 2244 jiffies! g8901 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27848 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x30d/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 79 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:311 [inline]
RIP: 0010:smp_call_function_many_cond+0xd8a/0x1190 kernel/smp.c:855
Code: 89 f6 83 e6 01 31 ff e8 14 01 0b 00 41 83 e6 01 49 be 00 00 00 00 00 fc ff df 75 07 e8 4f fd 0a 00 eb 38 f3 90 42 0f b6 04 33 <84> c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 33 fd 0a 00 eb e4 44
RSP: 0018:ffffc900020df780 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110171c87a5 RCX: ffff888018308000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900020df900 R08: ffffffff911ef507 R09: 1ffffffff223dea0
R10: dffffc0000000000 R11: fffffbfff223dea1 R12: ffff8880b8e43d28
R13: ffff8880b8f3d380 R14: dffffc0000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fc7a7b492 CR3: 000000000cf32000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1022
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:2222 [inline]
 text_poke_bp_batch+0x31e/0x980 arch/x86/kernel/alternative.c:2432
 text_poke_flush arch/x86/kernel/alternative.c:2623 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2630
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x123/0x240 kernel/jump_label.c:207
 static_key_enable+0x1a/0x20 kernel/jump_label.c:220
 toggle_allocation_gate+0xa8/0x260 mm/kfence/core.c:847
 process_one_work kernel/workqueue.c:2657 [inline]
 process_scheduled_works+0xa60/0x1600 kernel/workqueue.c:2734
 worker_thread+0xa5e/0xfe0 kernel/workqueue.c:2815
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
CPU: 0 PID: 5888 Comm: syz.1.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x4ac/0x2990 arch/x86/kernel/unwind_orc.c:494
Code: c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4d 8d 7c 45 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 <84> c0 75 34 4d 63 27 4d 01 fc 4c 89 e7 4c 89 f6 e8 ef cb 4b 00 49
RSP: 0018:ffffc90000007218 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff8ea4c6f8 RCX: dffffc0000000000
RDX: ffff888023ad0000 RSI: 000000000002ed68 RDI: 000000000002ed74
RBP: ffffffff8ea4c6cc R08: ffffc900000073b0 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: 000000000002ed68
R13: ffffffff8ea4c6cc R14: ffffffff81e72384 R15: ffffffff8ea4c6e0
FS:  00007f03e48b36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5898502ff8 CR3: 0000000024905000 CR4: 00000000003506f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1007 [inline]
 __kmalloc_node+0xb6/0x240 mm/slab_common.c:1014
 kmalloc_array_node include/linux/slab.h:698 [inline]
 kcalloc_node include/linux/slab.h:703 [inline]
 memcg_alloc_slab_cgroups+0x85/0x120 mm/memcontrol.c:2928
 account_slab mm/slab.h:641 [inline]
 allocate_slab mm/slub.c:2046 [inline]
 new_slab+0xc3/0x2d0 mm/slub.c:2081
 ___slab_alloc+0xc5c/0x12f0 mm/slub.c:3253
 __slab_alloc mm/slub.c:3339 [inline]
 __slab_alloc_node mm/slub.c:3392 [inline]
 slab_alloc_node mm/slub.c:3485 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x109/0x2c0 mm/slub.c:3519
 dst_alloc+0x105/0x170 net/core/dst.c:90
 ip6_dst_alloc net/ipv6/route.c:344 [inline]
 icmp6_dst_alloc+0x7c/0x400 net/ipv6/route.c:3320
 ndisc_send_skb+0x422/0x1480 net/ipv6/ndisc.c:493
 addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
 call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
 expire_timers kernel/time/timer.c:1752 [inline]
 __run_timers+0x570/0x810 kernel/time/timer.c:2023
 run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
 handle_softirqs+0x27d/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
 irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__bpf_prog_run include/linux/filter.h:617 [inline]
RIP: 0010:bpf_prog_run include/linux/filter.h:624 [inline]
RIP: 0010:bpf_prog_run_array include/linux/bpf.h:1994 [inline]
RIP: 0010:trace_call_bpf+0x319/0x6c0 kernel/trace/bpf_trace.c:143
Code: be 58 02 00 00 e8 e7 52 cd ff 66 90 e8 b0 14 f6 ff 4c 8d 63 30 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 3c 08 00 <74> 08 4c 89 e7 e8 5d 92 4e 00 48 83 c3 48 48 8b 7c 24 20 48 89 de
RSP: 0018:ffffc9000489e4e0 EFLAGS: 00000246
RAX: 1ffff920006e5a06 RBX: ffffc9000372d000 RCX: dffffc0000000000
RDX: ffffc9000d3eb000 RSI: 00000000000673d3 RDI: 00000000000673d4
RBP: ffffc9000489e5d8 R08: ffffc9000489e56f R09: 0000000000000000
R10: ffffc9000489e560 R11: fffff52000913cae R12: ffffc9000372d030
R13: ffff888077c2f398 R14: ffff888077c2f3a8 R15: 0000000000000001
 perf_trace_run_bpf_submit+0x7a/0x1c0 kernel/events/core.c:10295
 perf_trace_lock_acquire+0x342/0x400 include/trace/events/lock.h:24
 trace_lock_acquire include/trace/events/lock.h:24 [inline]
 lock_acquire+0x3ef/0x420 kernel/locking/lockdep.c:5725
 fs_reclaim_acquire+0x98/0x100 mm/page_alloc.c:3617
 might_alloc include/linux/sched/mm.h:303 [inline]
 slab_pre_alloc_hook+0x2a/0x300 mm/slab.h:714
 slab_alloc_node mm/slub.c:3477 [inline]
 slab_alloc mm/slub.c:3503 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3510 [inline]
 kmem_cache_alloc+0x5a/0x2c0 mm/slub.c:3519
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 __kernfs_new_node+0xe5/0x7f0 fs/kernfs/dir.c:624
 kernfs_new_node+0x14c/0x260 fs/kernfs/dir.c:700
 kernfs_create_dir_ns+0x44/0x120 fs/kernfs/dir.c:1061
 internal_create_group+0x21d/0xd10 fs/sysfs/group.c:138
 dpm_sysfs_add+0x6a/0x270 drivers/base/power/sysfs.c:702
 device_add+0x55c/0xc40 drivers/base/core.c:3645
 rfkill_register+0x170/0x9b0 net/rfkill/core.c:1102
 wiphy_register+0x2354/0x2ac0 net/wireless/core.c:1031
 ieee80211_register_hw+0x2dd8/0x3b30 net/mac80211/main.c:1426
 mac80211_hwsim_new_radio+0x2a75/0x4d70 drivers/net/wireless/virtual/mac80211_hwsim.c:5306
 hwsim_new_radio_nl+0xdad/0x1a70 drivers/net/wireless/virtual/mac80211_hwsim.c:5987
 genl_family_rcv_msg_doit+0x21a/0x310 net/netlink/genetlink.c:971
 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]
 genl_rcv_msg+0x611/0x7a0 net/netlink/genetlink.c:1066
 netlink_rcv_skb+0x235/0x4c0 net/netlink/af_netlink.c:2550
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x7b1/0x930 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x8d0/0xbf0 net/netlink/af_netlink.c:1899
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x61b/0x980 net/socket.c:2595
 ___sys_sendmsg+0x2a6/0x360 net/socket.c:2649
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2687 [inline]
 __se_sys_sendmsg+0x1d0/0x2c0 net/socket.c:2685
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f03e399e159
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:00007f03e48b3028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f03e3c25fa0 RCX: 00007f03e399e159
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007f03e3a35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f03e3c26038 R14: 00007f03e3c25fa0 R15: 00007ffd274ef7b8
 </TASK>