rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (2 ticks this GP) idle=25bc/1/0x4000000000000000 softirq=13818/13818 fqs=0
rcu: 	(detected by 0, t=10502 jiffies, g=12661, q=533 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 6633 Comm: syz.2.295 Not tainted 6.6.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:lockdep_hardirqs_off+0x96/0x100 kernel/locking/lockdep.c:4462
Code: b9 aa 8a e8 4c 14 00 00 65 c7 05 89 3c 95 75 00 00 00 00 49 89 9e 88 0a 00 00 41 8b 86 78 0a 00 00 ff c0 41 89 86 78 0a 00 00 <41> 89 86 94 0a 00 00 eb 17 48 c7 c7 e0 b9 aa 8a e8 15 14 00 00 65
RSP: 0018:ffffc900001f0a08 EFLAGS: 00000006
RAX: 000000000376c2af RBX: ffffffff8a6d222e RCX: 87d62170b5b5d500
RDX: 0000000000000000 RSI: ffffffff8aaab9c0 RDI: ffffffff8afc66c0
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888021819e00 R15: 0000000000000000
FS:  00007fabfba286c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e20eff8 CR3: 000000007e101000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 irqentry_enter+0x2b/0x50 kernel/entry/common.c:-1
 sysvec_irq_work+0xe/0xc0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:rcu_read_unlock_special+0x88/0x4c0 kernel/rcu/tree_plugin.h:682
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 39 58 93 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001f0b00 EFLAGS: 00000206
RAX: 87d62170b5b5d500 RBX: 1ffff9200003e168 RCX: 87d62170b5b5d500
RDX: dffffc0000000000 RSI: ffffffff8aaab9c0 RDI: ffffffff8afc66c0
RBP: ffffc900001f0bf0 R08: ffffffff90da3517 R09: 1ffffffff21b46a2
R10: dffffc0000000000 R11: fffffbfff21b46a3 R12: ffffffff8cd35400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:818 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x15a/0x180 net/mac80211/util.c:804
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1755 [inline]
 __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1819
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1836
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 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:__sanitizer_cov_trace_pc+0x57/0x60 kernel/kcov.c:232
Code: 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 15 00 00 48 39 cf 73 08 48 89 3a <48> 89 44 f2 08 c3 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 70
RSP: 0018:ffffc900049575b8 EFLAGS: 00000287
RAX: ffffffff818dad68 RBX: 0000000000000024 RCX: 0000000000080000
RDX: ffffc9000d203000 RSI: 00000000000004ab RDI: 00000000000004ac
RBP: 0000000000000000 R08: ffffffff8e4a882f R09: 1ffffffff1c95105
R10: dffffc0000000000 R11: fffffbfff1c95106 R12: ffffffff8c7d1a38
R13: dffffc0000000000 R14: ffffc90004957660 R15: 0000000000000000
 perf_trace_buf_alloc+0x158/0x290 kernel/trace/trace_event_perf.c:416
 perf_trace_lock+0x193/0x380 include/trace/events/lock.h:50
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x857/0x8b0 kernel/locking/lockdep.c:5765
 might_alloc include/linux/sched/mm.h:304 [inline]
 slab_pre_alloc_hook+0x31/0x310 mm/slab.h:714
 slab_alloc_node mm/slub.c:3467 [inline]
 __kmem_cache_alloc_node+0x53/0x260 mm/slub.c:3524
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc_node+0xa4/0x230 mm/slab_common.c:1014
 kmalloc_node include/linux/slab.h:620 [inline]
 __vmalloc_area_node mm/vmalloc.c:3144 [inline]
 __vmalloc_node_range+0x59a/0x1320 mm/vmalloc.c:3339
 __vmalloc_node mm/vmalloc.c:3404 [inline]
 __vmalloc+0x7a/0x90 mm/vmalloc.c:3418
 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98
 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136
 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2675
 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5467
 __do_sys_bpf kernel/bpf/syscall.c:5571 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5569 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5569
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fabfab8ebe9
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:00007fabfba28038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fabfadb5fa0 RCX: 00007fabfab8ebe9
RDX: 0000000000000090 RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fabfac11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fabfadb6038 R14: 00007fabfadb5fa0 R15: 00007ffd08226028
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g12661 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=4163
rcu: rcu_preempt kthread starved for 10502 jiffies! g12661 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->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:I stack:27272 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_timeout+0x160/0x280 kernel/time/timer.c:2167
 rcu_gp_fqs_loop+0x302/0x1560 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x99/0x380 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: 6633 Comm: syz.2.295 Not tainted 6.6.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:strlen+0x3f/0x70 lib/string.c:425
Code: 00 00 00 00 fc ff df 48 89 fb 49 89 c7 48 89 d8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 11 48 ff c3 49 8d 47 01 42 80 7c 3f 01 00 <75> de eb 19 89 d9 80 e1 07 38 c1 7c e6 49 89 fc 48 89 df e8 79 0e
RSP: 0018:ffffc900001f01d8 EFLAGS: 00000002
RAX: 0000000000000007 RBX: ffffffff8aabcbe8 RCX: 1ffff9200003e048
RDX: ffffffff81ac4d14 RSI: ffffffff8cd2fbe0 RDI: ffffffff8aabcbe0
RBP: ffffc900001f02f0 R08: ffffffff8e4a882f R09: 1ffffffff1c95105
R10: dffffc0000000000 R11: fffffbfff1c95106 R12: dffffc0000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000006
FS:  00007fabfba286c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e20eff8 CR3: 000000007e101000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 __fortify_strlen include/linux/fortify-string.h:228 [inline]
 trace_event_get_offsets_lock include/trace/events/lock.h:50 [inline]
 perf_trace_lock+0xcd/0x380 include/trace/events/lock.h:50
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x857/0x8b0 kernel/locking/lockdep.c:5765
 rcu_lock_release include/linux/rcupdate.h:344 [inline]
 rcu_read_unlock include/linux/rcupdate.h:819 [inline]
 __perf_event_output kernel/events/core.c:7983 [inline]
 perf_event_output_forward+0x2f7/0x3a0 kernel/events/core.c:7992
 __perf_event_overflow+0x447/0x630 kernel/events/core.c:9717
 perf_swevent_overflow kernel/events/core.c:9793 [inline]
 perf_swevent_event+0x2f5/0x5c0 kernel/events/core.c:-1
 perf_tp_event+0x4f9/0x13a0 kernel/events/core.c:10343
 perf_trace_run_bpf_submit+0xf4/0x1c0 kernel/events/core.c:10267
 perf_trace_preemptirq_template+0x281/0x340 include/trace/events/preemptirq.h:14
 trace_irq_enable+0xbf/0xe0 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x18/0x40 kernel/trace/trace_preemptirq.c:56
 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:723
RIP: 0010:rcu_read_unlock_special+0x88/0x4c0 kernel/rcu/tree_plugin.h:682
Code: f1 f1 f1 00 f2 f2 f2 4a 89 04 2b 66 42 c7 44 2b 09 f3 f3 42 c6 44 2b 0b f3 65 44 8b 35 39 58 93 7e 41 f7 c6 00 00 f0 00 74 45 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 66 42 c7 44 2b
RSP: 0018:ffffc900001f0b00 EFLAGS: 00000206
RAX: 87d62170b5b5d500 RBX: 1ffff9200003e168 RCX: 87d62170b5b5d500
RDX: dffffc0000000000 RSI: ffffffff8aaab9c0 RDI: ffffffff8afc66c0
RBP: ffffc900001f0bf0 R08: ffffffff90da3517 R09: 1ffffffff21b46a2
R10: dffffc0000000000 R11: fffffbfff21b46a3 R12: ffffffff8cd35400
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000002
 __rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:818 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x15a/0x180 net/mac80211/util.c:804
 mac80211_hwsim_beacon+0xbb/0x1b0 drivers/net/wireless/virtual/mac80211_hwsim.c:2295
 __run_hrtimer kernel/time/hrtimer.c:1755 [inline]
 __hrtimer_run_queues+0x51e/0xc40 kernel/time/hrtimer.c:1819
 hrtimer_run_softirq+0x187/0x2b0 kernel/time/hrtimer.c:1836
 handle_softirqs+0x280/0x820 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0xc7/0x190 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:__sanitizer_cov_trace_pc+0x57/0x60 kernel/kcov.c:232
Code: 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 15 00 00 48 39 cf 73 08 48 89 3a <48> 89 44 f2 08 c3 0f 1f 00 f3 0f 1e fa 48 8b 04 24 65 48 8b 15 70
RSP: 0018:ffffc900049575b8 EFLAGS: 00000287
RAX: ffffffff818dad68 RBX: 0000000000000024 RCX: 0000000000080000
RDX: ffffc9000d203000 RSI: 00000000000004ab RDI: 00000000000004ac
RBP: 0000000000000000 R08: ffffffff8e4a882f R09: 1ffffffff1c95105
R10: dffffc0000000000 R11: fffffbfff1c95106 R12: ffffffff8c7d1a38
R13: dffffc0000000000 R14: ffffc90004957660 R15: 0000000000000000
 perf_trace_buf_alloc+0x158/0x290 kernel/trace/trace_event_perf.c:416
 perf_trace_lock+0x193/0x380 include/trace/events/lock.h:50
 trace_lock_release include/trace/events/lock.h:69 [inline]
 lock_release+0x857/0x8b0 kernel/locking/lockdep.c:5765
 might_alloc include/linux/sched/mm.h:304 [inline]
 slab_pre_alloc_hook+0x31/0x310 mm/slab.h:714
 slab_alloc_node mm/slub.c:3467 [inline]
 __kmem_cache_alloc_node+0x53/0x260 mm/slub.c:3524
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc_node+0xa4/0x230 mm/slab_common.c:1014
 kmalloc_node include/linux/slab.h:620 [inline]
 __vmalloc_area_node mm/vmalloc.c:3144 [inline]
 __vmalloc_node_range+0x59a/0x1320 mm/vmalloc.c:3339
 __vmalloc_node mm/vmalloc.c:3404 [inline]
 __vmalloc+0x7a/0x90 mm/vmalloc.c:3418
 bpf_prog_alloc_no_stats+0x47/0x440 kernel/bpf/core.c:98
 bpf_prog_alloc+0x3d/0x1b0 kernel/bpf/core.c:136
 bpf_prog_load+0x6b8/0x16d0 kernel/bpf/syscall.c:2675
 __sys_bpf+0x55a/0x800 kernel/bpf/syscall.c:5467
 __do_sys_bpf kernel/bpf/syscall.c:5571 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5569 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5569
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fabfab8ebe9
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:00007fabfba28038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fabfadb5fa0 RCX: 00007fabfab8ebe9
RDX: 0000000000000090 RSI: 0000200000000240 RDI: 0000000000000005
RBP: 00007fabfac11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fabfadb6038 R14: 00007fabfadb5fa0 R15: 00007ffd08226028
 </TASK>