rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-....: (0 ticks this GP) idle=e6ec/1/0x4000000000000000 softirq=226116/226116 fqs=5249
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P24044
	(detected by 0, t=10502 jiffies, g=352941, q=523 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 24044 Comm: syz.1.13732 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__lock_acquire+0x1a6/0x7d10 kernel/locking/lockdep.c:4948
Code: 48 85 c0 0f 84 c5 58 00 00 4d 8d b4 24 d8 0a 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 70 42 0f b6 04 00 84 c0 0f 85 6a 65 00 00 <41> 8b 06 48 89 44 24 60 48 c7 c0 40 c1 bf 96 48 c1 e8 03 42 0f b6
RSP: 0018:ffffc900001e0560 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8cb2d6e0 RCX: 1ffff9200003c0d0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8cb2d6e0
RBP: ffffc900001e07b0 R08: dffffc0000000000 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff1c3f9a6 R12: ffff88802ab68000
R13: 0000000000000000 R14: ffff88802ab68ad8 R15: ffffffff9047e0c0
FS:  00007f2d81f016c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000005e11d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5662
 rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 rcu_read_lock_sched include/linux/rcupdate.h:883 [inline]
 pfn_valid include/linux/mmzone.h:1857 [inline]
 __virt_addr_valid+0x1a5/0x540 arch/x86/mm/physaddr.c:65
 kasan_addr_to_slab+0x9/0xc0 mm/kasan/common.c:36
 __kasan_record_aux_stack+0xf/0xc0 mm/kasan/generic.c:471
 irq_work_queue_on+0x10f/0x260 kernel/irq_work.c:140
 rcu_read_unlock_special+0x3c9/0x510 kernel/rcu/tree_plugin.h:678
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 trace_call_bpf+0x5bb/0x6b0 kernel/trace/bpf_trace.c:137
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:9997
 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_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
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 08 8b 8a e8 df 51 dd 08 65 66 c7 05 15 37 b4 7e 00 00 e8 b0 74 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:ffffc900001e0e00 EFLAGS: 00000286
RAX: 30dfc52627792b00 RBX: 0000000000000200 RCX: 30dfc52627792b00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc900001e0f30 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 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_special+0x21/0x510 kernel/rcu/tree_plugin.h:630
Code: eb 84 0f 1f 80 00 00 00 00 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec c0 00 00 00 65 48 8b 04 25 28 00 00 00 <48> 89 84 24 a0 00 00 00 49 bd 00 00 00 00 00 fc ff df 48 c7 44 24
RSP: 0018:ffffc900032f7a60 EFLAGS: 00000286
RAX: 30dfc52627792b00 RBX: ffff88802ab6843c RCX: 0000000000080000
RDX: ffffc90013cea000 RSI: 000000000007ffff RDI: ffff88802ab68000
RBP: ffffc900032f7b50 R08: ffff88801c90e517 R09: 1ffff11003921ca2
R10: dffffc0000000000 R11: ffffed1003921ca3 R12: 1ffff1100556d087
R13: 0000000000000000 R14: ffff88802ab68440 R15: dffffc0000000000
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 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
 __vunmap+0x856/0xa00 mm/vmalloc.c:2726
 btf_free+0xef/0x100 kernel/bpf/btf.c:1649
 btf_parse kernel/bpf/btf.c:5054 [inline]
 btf_new_fd+0x396/0x780 kernel/bpf/btf.c:6905
 __sys_bpf+0x612/0x780 kernel/bpf/syscall.c:5075
 __do_sys_bpf kernel/bpf/syscall.c:5134 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5132 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5132
 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: 0033:0x7f2d80f9c629
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:00007f2d81f01028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f2d81216090 RCX: 00007f2d80f9c629
RDX: 0000000000000020 RSI: 0000200000000280 RDI: 0000000000000012
RBP: 00007f2d81032b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d81216128 R14: 00007f2d81216090 R15: 00007ffc4d66a978
 </TASK>
task:syz.1.13732     state:R  running task     stack:24752 pid:24044 ppid:20068  flags:0x0000400c
Call Trace:
 <TASK>
 </TASK>