rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P5022 1-.... } 2666 jiffies s: 13937 root: 0x2/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5022 Comm: syz.4.173 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:216
Code: 89 fb e8 17 00 00 00 48 8b 3d 80 b0 9d 0c 48 89 de 5b e9 c7 3e 50 00 00 00 cc cc 00 00 cc 48 8b 04 24 65 48 8b 0d 94 f3 7f 7e <65> 8b 15 95 f3 7f 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc900001e07b8 EFLAGS: 00000046
RAX: ffffffff81a594b7 RBX: ffff888017697800 RCX: ffff888058308000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff888017697c7b R09: 1ffff11002ed2f8f
R10: dffffc0000000000 R11: ffffed1002ed2f90 R12: ffff888017697a00
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888017697a08
FS: 00007f63953356c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000004 CR3: 0000000028824000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
__perf_event_account_interrupt+0x187/0x280 kernel/events/core.c:9396
__perf_event_overflow+0x9d/0x610 kernel/events/core.c:9445
perf_swevent_overflow kernel/events/core.c:9579 [inline]
perf_swevent_event+0x315/0x570 kernel/events/core.c:9630
perf_tp_event+0x3e7/0xc30 kernel/events/core.c:10064
perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10032
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 80 10 8b 8a e8 0f 00 e0 08 65 66 c7 05 65 34 b4 7e 00 00 e8 40 79 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: 70b7fab0a9846400 RBX: 0000000000000200 RCX: 70b7fab0a9846400
RDX: dffffc0000000000 RSI: ffffffff8a8c1aa0 RDI: ffffffff8adf2060
RBP: ffffc900001e0f30 R08: ffffffff90aff277 R09: 1ffffffff215fe4e
R10: dffffc0000000000 R11: fffffbfff215fe4f 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
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:36 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline]
RIP: 0010:rcu_read_unlock_special+0xe4/0x510 kernel/rcu/tree_plugin.h:640
Code: 5e 41 5f 5d c3 49 89 ff 42 c6 44 2b 08 00 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 <42> c6 44 2b 08 f8 fa 41 f7 c4 00 02 00 00 74 0f e8 17 a9 1b 00 66
RSP: 0018:ffffc9000d83f860 EFLAGS: 00000246
RAX: f2f2f2f8f1f1f1f1 RBX: 1ffff92001b07f14 RCX: 0000000000080000
RDX: ffffc9000ead9000 RSI: 00000000000013da RDI: ffff888058308000
RBP: ffffc9000d83f960 R08: ffff888058308000 R09: 0000000000000002
R10: 0000000000000406 R11: 0000000000000002 R12: 0000000000000246
R13: dffffc0000000000 R14: 0000000080000000 R15: ffff888058308000
__rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426
rcu_read_unlock include/linux/rcupdate.h:823 [inline]
mt_find+0x605/0x830 lib/maple_tree.c:6558
find_vma+0x12c/0x1b0 mm/mmap.c:1898
lock_mm_and_find_vma+0x71/0x2f0 mm/memory.c:5385
do_user_addr_fault+0x2db/0xb10 arch/x86/mm/fault.c:1310
handle_page_fault arch/x86/mm/fault.c:1429 [inline]
exc_page_fault+0x60/0x100 arch/x86/mm/fault.c:1482
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0010:__get_user_4+0x1c/0x30 arch/x86/lib/getuser.S:85
Code: 01 ca c3 90 90 90 90 90 90 90 90 90 90 90 48 ba fd ef ff ff ff 7f 00 00 48 39 d0 0f 83 90 00 00 00 48 19 d2 48 21 d0 0f 01 cb <8b> 10 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 90 90 90 90 90 48 ba
RSP: 0018:ffffc9000d83fd38 EFLAGS: 00050202
RAX: 0000000000000004 RBX: ffffc9000d83fe20 RCX: 70b7fab0a9846400
RDX: ffffffffffffffff RSI: ffffffff8a8c2c20 RDI: ffffffff8adf2060
RBP: ffffc9000d83ff10 R08: ffffffff8e2029ef R09: 1ffffffff1c4053d
R10: dffffc0000000000 R11: fffffbfff1c4053e R12: 0000000000000000
R13: 0000000000000004 R14: dffffc0000000000 R15: 0000000000000000
perf_copy_attr+0x45/0x850 kernel/events/core.c:12099
__do_sys_perf_event_open kernel/events/core.c:12440 [inline]
__se_sys_perf_event_open+0xf5/0x1ec0 kernel/events/core.c:12418
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: 0033:0x7f639439ce59
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:00007f6395335028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f6394615fa0 RCX: 00007f639439ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f6394432d6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6394616038 R14: 00007f6394615fa0 R15: 00007ffc5bbc54c8