rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9959
	(detected by 1, t=10506 jiffies, g=41017, q=890 ncpus=2)
task:syz.1.1396      state:R  running task     stack:25040 pid:9959  ppid:4267   flags:0x00004002
Call Trace:
 <IRQ>
 sched_show_task+0x497/0x5b0 kernel/sched/core.c:8954
 rcu_print_detail_task_stall_rnp kernel/rcu/tree_stall.h:261 [inline]
 print_other_cpu_stall+0x10a9/0x1430 kernel/rcu/tree_stall.h:606
 check_cpu_stall kernel/rcu/tree_stall.h:778 [inline]
 rcu_pending kernel/rcu/tree.c:3895 [inline]
 rcu_sched_clock_irq+0x88a/0x1230 kernel/rcu/tree.c:2394
 update_process_times+0x143/0x1b0 kernel/time/timer.c:2072
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x37d/0x560 kernel/time/tick-sched.c:1501
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x50b/0xd50 kernel/time/hrtimer.c:1811
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1873
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:__stack_depot_save+0x0/0x460 lib/stackdepot.c:423
Code: c7 18 31 d2 5b 41 5e e9 ae 4e 38 fd 5b 41 5e c3 48 c7 c7 50 d3 1c 8d 4c 89 f6 e8 9b 50 00 00 eb bc 66 0f 1f 84 00 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 48 83 ec 30 45 89 c5 41 89 cc 89 d3
RSP: 0018:ffffc900001e0358 EFLAGS: 00000246
RAX: 0000000000000010 RBX: ffff8880266e0570 RCX: 0000000000132a20
RDX: 0000000000000000 RSI: 0000000000000010 RDI: ffffc900001e03a0
RBP: ffffc900001e0488 R08: 0000000000000001 R09: 000000000000000f
R10: dffffc0000000000 R11: fffff5200003c051 R12: dffffc0000000000
R13: 1ffff11004cdc0ae R14: ffffc900001e03a0 R15: 1ffff9200003c070
 save_stack+0x12f/0x230 mm/page_owner.c:128
 __set_page_owner+0x19/0x60 mm/page_owner.c:190
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2559
 prep_new_page mm/page_alloc.c:2566 [inline]
 get_page_from_freelist+0x1a1e/0x1ab0 mm/page_alloc.c:4357
 __alloc_pages+0x1ec/0x4f0 mm/page_alloc.c:5657
 alloc_slab_page+0x5d/0x160 mm/slub.c:1799
 allocate_slab mm/slub.c:1944 [inline]
 new_slab+0x87/0x2c0 mm/slub.c:1997
 ___slab_alloc+0xbc6/0x1240 mm/slub.c:3154
 __slab_alloc mm/slub.c:3240 [inline]
 slab_alloc_node mm/slub.c:3325 [inline]
 kmem_cache_alloc_node+0x1e5/0x320 mm/slub.c:3404
 __alloc_skb+0xfc/0x7e0 net/core/skbuff.c:505
 __netdev_alloc_skb+0x114/0x4f0 net/core/skbuff.c:579
 netdev_alloc_skb include/linux/skbuff.h:3261 [inline]
 dev_alloc_skb include/linux/skbuff.h:3274 [inline]
 __ieee80211_beacon_get+0xe17/0x1600 net/mac80211/tx.c:5350
 ieee80211_beacon_get_tim+0x63/0x4e0 net/mac80211/tx.c:5472
 ieee80211_beacon_get include/net/mac80211.h:5335 [inline]
 mac80211_hwsim_beacon_tx+0x21c/0xae0 drivers/net/wireless/mac80211_hwsim.c:2091
 __iterate_interfaces+0x243/0x500 net/mac80211/util.c:788
 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
 __run_hrtimer kernel/time/hrtimer.c:1747 [inline]
 __hrtimer_run_queues+0x54a/0xd50 kernel/time/hrtimer.c:1811
 hrtimer_run_softirq+0x183/0x2a0 kernel/time/hrtimer.c:1828
 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:unwind_next_frame+0x1f75/0x20b0 arch/x86/kernel/unwind_orc.c:605
Code: ff ff 4c 89 f7 e8 db 47 9a 00 e9 21 f3 ff ff 44 89 f1 80 e1 07 38 c1 0f 8c 86 f3 ff ff 4c 89 f7 e8 c0 47 9a 00 e9 79 f3 ff ff <44> 89 f9 80 e1 07 38 c1 0f 8c 4b f7 ff ff be 02 00 00 00 4c 89 ff
RSP: 0018:ffffc900053a74b0 EFLAGS: 00000206
RAX: 0000000000000006 RBX: ffffc900053a7588 RCX: ffffffff8a898605
RDX: 0000000000000010 RSI: 0000000000000001 RDI: ffffc900053a7ac0
RBP: ffffffff8a898684 R08: ffffc900053a75e7 R09: ffffc900053a75d8
R10: dffffc0000000000 R11: fffff52000a74ebd R12: ffffffff8a898683
R13: dffffc0000000000 R14: ffffc900053a75d8 R15: ffffffff8a898682
 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_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8e/0xa0 mm/kasan/common.c:384
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:936 [inline]
 __kmalloc_node_track_caller+0xae/0x230 mm/slab_common.c:956
 kmalloc_reserve net/core/skbuff.c:446 [inline]
 pskb_expand_head+0x1a6/0x12a0 net/core/skbuff.c:1848
 __bpf_try_make_writable net/core/filter.c:1674 [inline]
 bpf_try_make_writable net/core/filter.c:1680 [inline]
 bpf_try_make_head_writable net/core/filter.c:1688 [inline]
 ____bpf_clone_redirect net/core/filter.c:2467 [inline]
 bpf_clone_redirect+0x1e3/0x4a0 net/core/filter.c:2436
 bpf_prog_9228d3efff95bbb5+0x19/0x1d
 bpf_dispatcher_nop_func include/linux/bpf.h:1012 [inline]
 __bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_prog_run include/linux/filter.h:614 [inline]
 bpf_test_run+0x2b6/0x830 net/bpf/test_run.c:402
 bpf_prog_test_run_skb+0xaa6/0x12a0 net/bpf/test_run.c:1191
 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3695
 __sys_bpf+0x62b/0x780 kernel/bpf/syscall.c:5049
 __do_sys_bpf kernel/bpf/syscall.c:5135 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5133 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133
 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: 0033:0x7ff627f9cdd9
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:00007ff628edd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff628215fa0 RCX: 00007ff627f9cdd9
RDX: 0000000000000050 RSI: 00002000000003c0 RDI: 000000000000000a
RBP: 00007ff628032d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff628216038 R14: 00007ff628215fa0 R15: 00007ffd9384f598
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10375 jiffies! g41017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=27123
rcu: rcu_preempt kthread starved for 10376 jiffies! g41017 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:I stack:27184 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
 schedule+0xb9/0x180 kernel/sched/core.c:6638
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x303/0x1340 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 9980 Comm: syz.3.1401 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:error_entry+0xb1/0xf0 arch/x86/entry/entry_64.S:1091
Code: 00 00 00 74 2e 89 c8 48 39 84 24 88 00 00 00 74 1a 48 81 bc 24 88 00 00 00 03 10 40 8a 75 03 0f 01 f8 0f ae e8 48 8d 44 24 08 <c3> 48 89 8c 24 88 00 00 00 0f 01 f8 0f ae e8 66 90 b9 48 00 00 00
RSP: 0018:ffffc90000007d50 EFLAGS: 00000083
RAX: ffffc90000007d58 RBX: 0000000000000000 RCX: ffffffff8a400f8f
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8adf13a0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f7fca7166c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7fc97ea4c0 CR3: 0000000027ba8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
RIP: 0010:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1c8/0x930 kernel/softirq.c:584
Code: 89 7c 24 44 0f b7 db 48 c7 c7 00 07 8b 8a e8 bf a0 de 08 65 66 c7 05 a5 35 b4 7e 00 00 e8 80 73 39 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: e79e0e136f35b100 RBX: 0000000000000200 RCX: e79e0e136f35b100
RDX: dffffc0000000000 RSI: ffffffff8a8c1120 RDI: ffffffff8adf13a0
RBP: ffffc90000007f30 R08: ffffffff90af9307 R09: 1ffffffff215f260
R10: dffffc0000000000 R11: fffffbfff215f261 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+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:__rcu_read_unlock+0x49/0xd0 kernel/rcu/tree_plugin.h:425
Code: 04 00 00 49 89 dc 49 c1 ec 03 43 0f b6 04 3c 84 c0 75 48 ff 0b 75 1d 4c 8d b7 40 04 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 5f 41 83 3e 00 75 20 43 0f b6 04 3c 84 c0 75 3a 8b 03 3d
RSP: 0018:ffffc90005a3eff0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffff88802bbdbfbc RCX: 0000000000080000
RDX: ffffc9000dd6a000 RSI: 0000000000010558 RDI: ffff88802bbdbb80
RBP: dffffc0000000000 R08: ffff88801c5a71ff R09: 1ffff110038b4e3f
R10: dffffc0000000000 R11: ffffed10038b4e40 R12: 1ffff1100577b7f7
R13: 0000000000000003 R14: ffff88802bbdbfc0 R15: dffffc0000000000
 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:1486 [inline]
 free_pcp_prepare mm/page_alloc.c:1536 [inline]
 free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3413
 free_unref_page+0x2e/0x3f0 mm/page_alloc.c:3508
 free_slab mm/slub.c:2036 [inline]
 discard_slab mm/slub.c:2042 [inline]
 __unfreeze_partials+0x1a5/0x200 mm/slub.c:2591
 put_cpu_partial+0x17c/0x250 mm/slub.c:2667
 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_slab_alloc+0x1e/0x80 mm/kasan/common.c:306
 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]
 __kmem_cache_alloc_node+0x140/0x260 mm/slub.c:3398
 __do_kmalloc_node mm/slab_common.c:935 [inline]
 __kmalloc+0xa0/0x240 mm/slab_common.c:949
 kmalloc_array include/linux/slab.h:615 [inline]
 genl_family_rcv_msg_attrs_parse+0xa3/0x290 net/netlink/genetlink.c:560
 genl_start+0x2b2/0x4a0 net/netlink/genetlink.c:601
 __netlink_dump_start+0x3f9/0x6f0 net/netlink/af_netlink.c:2330
 genl_family_rcv_msg_dumpit+0x228/0x3c0 net/netlink/genetlink.c:703
 genl_family_rcv_msg net/netlink/genetlink.c:830 [inline]
 genl_rcv_msg+0x5cb/0x790 net/netlink/genetlink.c:850
 netlink_rcv_skb+0x1fb/0x450 net/netlink/af_netlink.c:2511
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5be/0x970 net/socket.c:2518
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
 __sys_sendmsg net/socket.c:2601 [inline]
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
 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: 0033:0x7f7fc979cdd9
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:00007f7fca716028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7fc9a15fa0 RCX: 00007f7fc979cdd9
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 000000000000000b
RBP: 00007f7fc9832d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7fc9a16038 R14: 00007f7fc9a15fa0 R15: 00007fff1b564dc8
 </TASK>