rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 1-....: (1 GPs behind) idle=e66c/1/0x4000000000000000 softirq=11060/11061 fqs=5248
rcu: hardirqs softirqs csw/system
rcu: number: 15022069 0 0
rcu: cputime: 6306 46220 0 ==> 52510(ms)
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5943
rcu: (detected by 0, t=10502 jiffies, g=8325, q=869 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5943 Comm: syz.3.27 Not tainted 6.6.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4820 [inline]
RIP: 0010:__lock_acquire+0xbb8/0x7c80 kernel/locking/lockdep.c:5087
Code: 38 c1 0f 8c c1 fe ff ff 48 c7 c7 a0 b9 4a 8e e8 5e c2 75 00 49 b8 00 00 00 00 00 fc ff df e9 a6 fe ff ff 8b 84 24 88 00 00 00 <38> 44 24 38 4c 8b 6c 24 20 4c 8b 7c 24 10 76 38 e8 23 d3 b3 02 49
RSP: 0018:ffffc900001f03c0 EFLAGS: 00000046
RAX: 0000000000082002 RBX: 0000000000082002 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90da3520
RBP: ffffc900001f0608 R08: dffffc0000000000 R09: 1ffffffff21b46a4
R10: dffffc0000000000 R11: fffffbfff21b46a5 R12: 0000000000000000
R13: ffff88802d562900 R14: 0000000000000001 R15: ffff88802d561e00
FS: 00007f198646a6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e317ff8 CR3: 0000000075d0f000 CR4: 00000000003506e0
Call Trace:
lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754
rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
rcu_read_lock include/linux/rcupdate.h:786 [inline]
__perf_event_output kernel/events/core.c:7955 [inline]
perf_event_output_forward+0xb5/0x3a0 kernel/events/core.c:7978
__perf_event_overflow+0x447/0x630 kernel/events/core.c:9703
perf_swevent_overflow kernel/events/core.c:9779 [inline]
perf_swevent_event+0x2f5/0x5c0 kernel/events/core.c:-1
perf_tp_event+0x4f9/0x13a0 kernel/events/core.c:10329
perf_trace_run_bpf_submit+0xf4/0x1c0 kernel/events/core.c:10253
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:variable_ffs arch/x86/include/asm/bitops.h:319 [inline]
RIP: 0010:handle_softirqs+0x1b0/0x820 kernel/softirq.c:566
Code: 89 64 24 2c 0f b7 db 48 c7 c7 a0 b2 a9 8a e8 d7 99 1b 09 65 66 c7 05 1d 25 b2 7e 00 00 e8 a8 63 3a 00 fb 49 c7 c6 c0 a0 a0 8c <89> 5c 24 34 b8 ff ff ff ff 0f bc 44 24 34 41 89 c5 41 ff c5 0f 84
RSP: 0018:ffffc900001f0e40 EFLAGS: 00000286
RAX: 0ac2837db3539500 RBX: 0000000000000200 RCX: 0ac2837db3539500
RDX: dffffc0000000000 RSI: ffffffff8aaaba40 RDI: ffffffff8afc6780
RBP: ffffc900001f0f50 R08: ffffffff8e4a84ef R09: 1ffffffff1c9509d
R10: dffffc0000000000 R11: fffffbfff1c9509e R12: 000000000000000a
R13: 0000000000000000 R14: ffffffff8ca0a0c0 R15: ffff88802d561e00
__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
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:32 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:89 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline]
RIP: 0010:rcu_read_unlock_special+0xe4/0x4c0 kernel/rcu/tree_plugin.h:637
Code: 5d 03 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 49 89 ff 48 c7 84 24 80 00 00 00 00 00 00 00 9c 8f 84 24 80 00 00 00 <4c> 8b a4 24 80 00 00 00 fa 41 f7 c4 00 02 00 00 74 0f e8 25 8e 1b
RSP: 0018:ffffc90005227a20 EFLAGS: 00000246
RAX: f2f2f200f1f1f1f1 RBX: 1ffff92000a44f4c RCX: 0000000000080000
RDX: ffffc9000d32c000 RSI: 000000000005d8c8 RDI: ffff88802d561e00
RBP: ffffc90005227b20 R08: ffffffff8e4a84ef R09: 1ffffffff1c9509d
R10: dffffc0000000000 R11: fffffbfff1c9509e R12: 1ffff11005aac447
R13: dffffc0000000000 R14: 0000000080000000 R15: ffff88802d561e00
__rcu_read_unlock+0x7c/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:818 [inline]
bpf_test_timer_leave+0x109/0x150 net/bpf/test_run.c:57
bpf_test_timer_continue+0x284/0x380 net/bpf/test_run.c:83
bpf_prog_test_run_flow_dissector+0x42d/0x600 net/bpf/test_run.c:1355
bpf_prog_test_run+0x321/0x390 kernel/bpf/syscall.c:4123
__sys_bpf+0x440/0x800 kernel/bpf/syscall.c:5485
__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: 0033:0x7f198558ebe9
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:00007f198646a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f19857b5fa0 RCX: 00007f198558ebe9
RDX: 0000000000000050 RSI: 0000200000000440 RDI: 000000000000000a
RBP: 00007f1985611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f19857b6038 R14: 00007f19857b5fa0 R15: 00007fff181dfc58
task:syz.3.27 state:R running task stack:23592 pid:5943 ppid:5787 flags:0x0000400a
Call Trace: