rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2691 jiffies s: 90105 root: 0x1/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19086 Comm: syz.1.4532 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline]
RIP: 0010:kasan_check_range+0xf/0x290 mm/kasan/generic.c:189
Code: 0b b8 ea ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc cc 00 00 cc cc b0 01 48 85 f6 0f 84 a4 01 00 00 41 57 41 56 <53> 49 89 f8 49 01 f0 0f 82 57 02 00 00 49 89 f8 49 c1 e8 2f 41 81
RSP: 0018:ffffc90000006d70 EFLAGS: 00000002
RAX: ffffffff81845201 RBX: ffff8880541a9dc0 RCX: ffffffff81845258
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8880541a9dc0
RBP: 0000000000000001 R08: dffffc0000000000 R09: ffffc90000007040
R10: fffff52000000e0a R11: 1ffff92000000e08 R12: dffffc0000000000
R13: 0000000000000302 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007f073f6136c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd88129fd58 CR3: 0000000058540000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 instrument_atomic_read include/linux/instrumented.h:72 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 test_ti_thread_flag include/linux/thread_info.h:118 [inline]
 tracing_gen_ctx_irq_test+0x38/0x150 kernel/trace/trace.c:2644
 tracing_gen_ctx_flags include/linux/trace_events.h:185 [inline]
 tracing_gen_ctx include/linux/trace_events.h:192 [inline]
 perf_trace_buf_update+0x9c/0x220 kernel/trace/trace_event_perf.c:433
 perf_tp_event+0x132/0xb60 kernel/events/core.c:10025
 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10002
 perf_trace_preemptirq_template+0x287/0x330 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:rcu_read_unlock_special+0x84/0x500 kernel/rcu/tree_plugin.h:685
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 2d 97 96 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:ffffc90000007340 EFLAGS: 00000206
RAX: b73c1ed5c3b20800 RBX: 1ffff92000000e70 RCX: b73c1ed5c3b20800
RDX: dffffc0000000000 RSI: ffffffff8a8c0500 RDI: ffffffff8adefca0
RBP: ffffc90000007430 R08: dffffc0000000000 R09: fffffbfff215c464
R10: fffffbfff215c464 R11: 1ffffffff215c463 R12: 0000000000000246
R13: dffffc0000000000 R14: ffff8880b8e3b900 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
 rcu_read_unlock include/linux/rcupdate.h:823 [inline]
 dev_queue_xmit_nit+0xa80/0xbb0 net/core/dev.c:2357
 xmit_one net/core/dev.c:3666 [inline]
 dev_hard_start_xmit+0x154/0x870 net/core/dev.c:3686
 __dev_queue_xmit+0x1bf1/0x3760 net/core/dev.c:4346
 dev_queue_xmit include/linux/netdevice.h:3051 [inline]
 br_send_bpdu_finish net/bridge/br_stp_bpdu.c:32 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 br_send_bpdu+0x471/0x8e0 net/bridge/br_stp_bpdu.c:59
 br_send_config_bpdu+0x416/0x6b0 net/bridge/br_stp_bpdu.c:120
 br_transmit_config+0x3ab/0x5c0 net/bridge/br_stp.c:241
 br_config_bpdu_generation+0x11f/0x1d0 net/bridge/br_stp.c:400
 br_hello_timer_expired+0x97/0x1c0 net/bridge/br_stp_timer.c:37
 call_timer_fn+0x1a0/0x670 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x525/0x7c0 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x12f/0x220 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:bpf_prog_select_runtime+0x744/0x7d0 kernel/bpf/core.c:2246
Code: 89 ff e8 6f 5e 43 00 e9 80 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 0f fc ff ff 4c 89 e7 e8 e1 5d 43 00 e9 02 fc ff ff <44> 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 26 fd ff ff 4c 89 ff e8 33
RSP: 0018:ffffc900039d7b48 EFLAGS: 00000202
RAX: 0000000000000004 RBX: 1ffff920007eda07 RCX: 0000000000080000
RDX: ffffc900105e3000 RSI: 000000000001d012 RDI: 000000000001d013
RBP: dffffc0000000000 R08: dffffc0000000000 R09: ffffed10171c6afa
R10: ffffed10171c6afa R11: 1ffff110171c6af9 R12: 0000000000000000
R13: 1ffff9200073af84 R14: dffffc0000000000 R15: ffffc900039d7c60
 bpf_prog_load+0x109d/0x15a0 kernel/bpf/syscall.c:2652
 __sys_bpf+0x520/0x6d0 kernel/bpf/syscall.c:5027
 __do_sys_bpf kernel/bpf/syscall.c:5131 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5129 [inline]
 __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5129
 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: 0033:0x7f073e78eba9
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:00007f073f613038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f073e9d5fa0 RCX: 00007f073e78eba9
RDX: 0000000000000080 RSI: 0000200000000600 RDI: 0000000000000005
RBP: 00007f073e811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f073e9d6038 R14: 00007f073e9d5fa0 R15: 00007fff49a31378
 </TASK>