rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2681 jiffies s: 22445 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7561 Comm: syz.3.839 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
RIP: 0010:lockdep_hardirqs_on_prepare+0x420/0x770 kernel/locking/lockdep.c:4316
Code: 00 00 fc ff df eb 8c 48 c7 c7 a0 23 8c 8a e8 f7 ad c8 08 48 ba 00 00 00 00 00 fc ff df b8 ff ff ff ff 65 0f c1 05 60 6c 9e 7e <83> f8 01 48 8b 5c 24 18 75 34 48 c7 44 24 20 0e 36 e0 45 48 c7 04
RSP: 0018:ffffc900001e0aa0 EFLAGS: 00000057
RAX: 0000000000000001 RBX: ffff88802bdfe418 RCX: 6da926a18d780c00
RDX: dffffc0000000000 RSI: ffffffff8a8c23a0 RDI: ffffffff8adf0de0
RBP: ffffc900001e0b60 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: ffff88802bdfe468
R13: 0000000000000001 R14: 1ffff110057bfc83 R15: ffff88802bdfe400
FS:  00007f86634cc6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e3578 CR3: 0000000023b85000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 trace_hardirqs_on+0x34/0x40 kernel/trace/trace_preemptirq.c:49
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:728
RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 92 31 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc900001e0c20 EFLAGS: 00000206
RAX: 6da926a18d780c00 RBX: 1ffff9200003c18c RCX: 6da926a18d780c00
RDX: dffffc0000000000 RSI: ffffffff8a8c1220 RDI: ffffffff8adf0de0
RBP: ffffc900001e0d08 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8f3b900 R15: 0000000000000002
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 rebalance_domains+0x8da/0xa10 kernel/sched/fair.c:11057
 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:security_capable+0x5b/0xb0 security/security.c:809
Code: c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 ce f0 07 fe 4d 8b 24 24 4d 85 e4 74 35 4d 8d 6c 24 18 4c 89 e8 48 c1 e8 03 80 3c 18 00 <74> 08 4c 89 ef e8 ab f0 07 fe 4c 89 ff 4c 89 f6 89 ea 8b 4c 24 04
RSP: 0018:ffffc90003ddfd18 EFLAGS: 00000246
RAX: 1ffffffff18ca2c0 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc9000eeb3000 RSI: 00000000000000ed RDI: 00000000000000ee
RBP: 0000000000000027 R08: ffff8880b8f3580b R09: 1ffff110171e6b01
R10: dffffc0000000000 R11: ffffed10171e6b02 R12: ffffffff8c6515e8
R13: ffffffff8c651600 R14: ffffffff8c9d7460 R15: ffff88802e6eb8c0
 ns_capable_common kernel/capability.c:376 [inline]
 ns_capable kernel/capability.c:397 [inline]
 capable+0x69/0xe0 kernel/capability.c:450
 bpf_capable include/linux/capability.h:264 [inline]
 __sys_bpf+0xc8/0x780 kernel/bpf/syscall.c:4982
 __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: 0033:0x7f866259c629
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:00007f86634cc028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f8662815fa0 RCX: 00007f866259c629
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f8662632b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8662816038 R14: 00007f8662815fa0 R15: 00007ffeca0219c8
 </TASK>