------------[ cut here ]------------
WARNING: CPU: 0 PID: 20297 at kernel/events/core.c:1655 perf_group_attach kernel/events/core.c:1655 [inline]
WARNING: CPU: 0 PID: 20297 at kernel/events/core.c:1655 add_event_to_ctx+0x8f3/0xc30 kernel/events/core.c:2229
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 20297 Comm: syz-executor.2 Not tainted 4.9.194+ #0
 ffff8801db607d48 ffffffff81b67001 0000000000000000 ffffffff82a3b3c0
 00000000ffffffff 0000000000000000 0000000000000009 ffff8801db607e28
 ffffffff813fef3a 0000000041b58ab3 ffffffff82e32f55 ffffffff813fed61
Call Trace:
 <IRQ> [ 3195.307352]  [<000000000500c97a>] __dump_stack lib/dump_stack.c:15 [inline]
 <IRQ> [ 3195.307352]  [<000000000500c97a>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000de6afa42>] panic+0x1d9/0x3bd kernel/panic.c:180
 [<000000003debf344>] __warn.cold+0x2f/0x2f kernel/panic.c:546
 [<000000003b86b9cc>] warn_slowpath_null+0x2d/0x40 kernel/panic.c:589
 [<00000000fe87ef53>] perf_group_attach kernel/events/core.c:1655 [inline]
 [<00000000fe87ef53>] add_event_to_ctx+0x8f3/0xc30 kernel/events/core.c:2229
 [<000000004f9ddea5>] __perf_install_in_context+0x282/0x330 kernel/events/core.c:2320
 [<000000001d29c1a2>] remote_function kernel/events/core.c:83 [inline]
 [<000000001d29c1a2>] remote_function+0x11e/0x1a0 kernel/events/core.c:63
 [<000000004c096acb>] flush_smp_call_function_queue+0xa7/0x360 kernel/smp.c:231
 [<00000000ea414005>] generic_smp_call_function_single_interrupt+0x13/0x30 kernel/smp.c:180
 [<000000009aa3a3bb>] __smp_call_function_interrupt arch/x86/kernel/smp.c:297 [inline]
 [<000000009aa3a3bb>] smp_call_function_interrupt+0x62/0x90 arch/x86/kernel/smp.c:304
 [<000000005487893e>] call_function_single_interrupt+0xa5/0xb0 arch/x86/entry/entry_64.S:674
 <EOI> [ 3195.420368]  [<00000000a0d9f6eb>] ? debug_smp_processor_id+0x9/0x20 lib/smp_processor_id.c:56
 [<00000000a0d9f6eb>] debug_smp_processor_id+0x9/0x20 lib/smp_processor_id.c:56
 [<000000002d660b08>] __rcu_is_watching kernel/rcu/tree.c:1053 [inline]
 [<000000002d660b08>] rcu_is_watching+0x15/0xb0 kernel/rcu/tree.c:1067
 [<0000000003075cbe>] rcu_read_lock_sched_held+0x8e/0x130 kernel/rcu/update.c:107
 [<000000008f6e42d3>] trace_tlb_flush include/trace/events/tlb.h:37 [inline]
 [<000000008f6e42d3>] flush_tlb_mm_range+0x25d/0x460 arch/x86/mm/tlb.c:465
 [<000000000d99b8ed>] flush_tlb_page arch/x86/include/asm/tlbflush.h:304 [inline]
 [<000000000d99b8ed>] ptep_clear_flush+0xe7/0x120 mm/pgtable-generic.c:80
 [<00000000470cdab0>] wp_page_copy+0x910/0x1470 mm/memory.c:2206
 [<00000000b8d69c70>] do_wp_page+0x546/0x20a0 mm/memory.c:2390
 [<00000000cc0ccd7a>] handle_pte_fault mm/memory.c:3562 [inline]
 [<00000000cc0ccd7a>] __handle_mm_fault mm/memory.c:3634 [inline]
 [<00000000cc0ccd7a>] handle_mm_fault+0xeff/0x2420 mm/memory.c:3671
 [<000000005b771650>] __do_page_fault+0x3f0/0xa60 arch/x86/mm/fault.c:1401
 [<000000006ee000eb>] do_page_fault+0x28/0x30 arch/x86/mm/fault.c:1464
 [<00000000f51168b0>] page_fault+0x25/0x30 arch/x86/entry/entry_64.S:956
 [<000000000a592b5f>] pipe_to_user+0xb0/0x160 fs/splice.c:1256
 [<00000000df7d9f04>] splice_from_pipe_feed fs/splice.c:521 [inline]
 [<00000000df7d9f04>] __splice_from_pipe+0x351/0x790 fs/splice.c:645
 [<0000000034fc6450>] vmsplice_to_user+0x1bd/0x1e0 fs/splice.c:1291
 [<000000001402ad10>] SYSC_vmsplice fs/splice.c:1370 [inline]
 [<000000001402ad10>] SyS_vmsplice+0x114/0x140 fs/splice.c:1353
 [<0000000052c94546>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000a92fee14>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Kernel Offset: disabled
Rebooting in 86400 seconds..