rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=c6bc/1/0x4000000000000000 softirq=40137/40138 fqs=0
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P9110/2:b..l
	(detected by 0, t=10502 jiffies, g=45109, q=58 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10653 Comm: syz.3.1286 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:-1 [inline]
RIP: 0010:__lock_acquire+0xe92/0x7c50 kernel/locking/lockdep.c:5033
Code: 00 74 12 4c 89 f7 e8 7d e7 6d 00 49 b8 00 00 00 00 00 fc ff df 4d 89 2e 48 8b 44 24 70 42 0f b6 04 00 84 c0 0f 85 dd 5a 00 00 <4d> 8d b7 e0 0a 00 00 48 8b 44 24 40 8b 18 48 85 db 4c 8b 7c 24 18
RSP: 0018:ffffc900001e08e0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff888019e7e410 RCX: ffffffff816304c6
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90ae1240
RBP: ffffc900001e0b30 R08: dffffc0000000000 R09: fffffbfff215c249
R10: fffffbfff215c249 R11: 1ffffffff215c248 R12: ffff888019e7d940
R13: 704185f5a13f4fd9 R14: ffff888019e7e448 R15: ffff888019e7d940
FS:  00007ffa11fd56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffa1176ed58 CR3: 0000000062b77000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock include/linux/rcupdate.h:791 [inline]
 advance_sched+0x6e8/0x970 net/sched/sch_taprio.c:753
 __run_hrtimer kernel/time/hrtimer.c:1752 [inline]
 __hrtimer_run_queues+0x554/0xd60 kernel/time/hrtimer.c:1816
 hrtimer_interrupt+0x3c5/0x9c0 kernel/time/hrtimer.c:1878
 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+0x9b/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:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x32/0x60 kernel/kcov.c:216
Code: 14 9f 81 7e 65 8b 15 15 9f 81 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 32 48 8d 7e 01 8b 89 fc
RSP: 0018:ffffc90003e07660 EFLAGS: 00000246
RAX: ffffffff881f537c RBX: ffff8880515ff800 RCX: ffff888019e7d940
RDX: 0000000000000002 RSI: ffff8880515ff9b8 RDI: ffff8880515ff800
RBP: ffffc90003e078d0 R08: ffffc90003e07870 R09: ffffc90003e07820
R10: fffffbfff1c3ee26 R11: 1ffffffff1c3ee25 R12: dffffc0000000000
R13: ffff8880515ff9b8 R14: ffffc90003e07820 R15: ffff8880515ff800
 __skb_try_recv_datagram+0x4c/0x4d0 net/core/datagram.c:244
 __unix_dgram_recvmsg+0x2d1/0xd70 net/unix/af_unix.c:2451
 ____sys_recvmsg+0x292/0x580 net/socket.c:-1
 ___sys_recvmsg+0x1b2/0x510 net/socket.c:2780
 do_recvmmsg+0x359/0x7d0 net/socket.c:2874
 __sys_recvmmsg net/socket.c:2953 [inline]
 __do_sys_recvmmsg net/socket.c:2976 [inline]
 __se_sys_recvmmsg net/socket.c:2969 [inline]
 __x64_sys_recvmmsg+0x18d/0x240 net/socket.c:2969
 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: 0033:0x7ffa13d8ebe9
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:00007ffa11fd5038 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007ffa13fc6090 RCX: 00007ffa13d8ebe9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007ffa13e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffa13fc6128 R14: 00007ffa13fc6090 R15: 00007ffd48f61658
 </TASK>
task:kworker/u4:28   state:R  running task     stack:22320 pid:9110  ppid:2      flags:0x00004000
Workqueue: phy8 ieee80211_iface_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 preempt_schedule_irq+0xb1/0x150 kernel/sched/core.c:6873
 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:ieee80211_chanwidth_get_shift net/mac80211/ieee80211_i.h:1136 [inline]
RIP: 0010:ieee80211_chandef_get_shift net/mac80211/ieee80211_i.h:1149 [inline]
RIP: 0010:ieee80211_vif_get_shift+0x13b/0x290 net/mac80211/ieee80211_i.h:1161
Code: e8 8a 9a e2 f7 4d 85 f6 74 50 e8 80 9a e2 f7 49 83 c6 08 4c 89 f0 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 2f 01 00 00 41 8b 2e <bf> 07 00 00 00 89 ee e8 b9 9d e2 f7 45 31 f6 83 fd 07 41 0f 94 c6
RSP: 0018:ffffc90004dcf810 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff899e349a RCX: ffff8880629fd940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff215c249
R10: fffffbfff215c249 R11: 1ffffffff215c248 R12: dffffc0000000000
R13: ffff88807dd96800 R14: ffff888027e98760 R15: dffffc0000000000
 ieee80211_sta_get_rates+0xf5/0x6b0 net/mac80211/util.c:2169
 ieee80211_update_sta_info net/mac80211/ibss.c:1003 [inline]
 ieee80211_rx_bss_info net/mac80211/ibss.c:1118 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xff9/0x2b10 net/mac80211/ibss.c:1638
 ieee80211_iface_process_skb net/mac80211/iface.c:1671 [inline]
 ieee80211_iface_work+0x726/0xc80 net/mac80211/iface.c:1725
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: rcu_preempt kthread starved for 10502 jiffies! g45109 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27840 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 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:
CPU: 0 PID: 10647 Comm: syz.2.1285 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0xe7b/0x1270 kernel/smp.c:998
Code: 00 00 00 41 8b 1f 89 de 83 e6 01 31 ff e8 5d d9 0a 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 07 e8 e9 d5 0a 00 eb 37 f3 90 <41> 0f b6 04 1c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 ce d5 0a
RSP: 0018:ffffc90003cc7960 EFLAGS: 00000293
RAX: ffffffff8175fa52 RBX: dffffc0000000000 RCX: ffff88801afbd940
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003cc7ac0 R08: dffffc0000000000 R09: fffffbfff215c249
R10: fffffbfff215c249 R11: 1ffffffff215c248 R12: 1ffff110171e81c1
R13: ffff8880b8e3bb40 R14: 0000000000000001 R15: ffff8880b8f40e08
FS:  0000555580b9d500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d9fea CR3: 000000005e631000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1574 [inline]
 text_poke_bp_batch+0x2b0/0x7d0 arch/x86/kernel/alternative.c:1774
 text_poke_flush arch/x86/kernel/alternative.c:1965 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1972
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 static_key_disable_cpuslocked+0xc1/0x1a0 kernel/jump_label.c:237
 static_key_disable+0x16/0x20 kernel/jump_label.c:245
 tracepoint_remove_func kernel/tracepoint.c:417 [inline]
 tracepoint_probe_unregister+0x6a9/0x930 kernel/tracepoint.c:551
 bpf_raw_tp_link_release+0x5f/0x80 kernel/bpf/syscall.c:3190
 bpf_link_free kernel/bpf/syscall.c:2759 [inline]
 bpf_link_put+0x22a/0x2c0 kernel/bpf/syscall.c:2785
 bpf_link_release+0x37/0x40 kernel/bpf/syscall.c:2794
 __fput+0x22c/0x920 fs/file_table.c:320
 task_work_run+0x1ca/0x250 kernel/task_work.c:203
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3a2778ebe9
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:00007fffee6fc488 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f3a279c7da0 RCX: 00007f3a2778ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f3a279c7da0 R08: 00000000000004ac R09: 00000011ee6fc77f
R10: 00007f3a279c7cb0 R11: 0000000000000246 R12: 00000000000dc533
R13: 00007f3a279c6090 R14: ffffffffffffffff R15: 00007fffee6fc5a0
 </TASK>