perf buffer not large enough
------------[ cut here ]------------
WARNING: CPU: 0 PID: 12935 at kernel/trace/trace_event_perf.c:274 perf_trace_buf_alloc.cold.2+0x18/0x2b kernel/trace/trace_event_perf.c:273
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 12935 Comm: syz-executor4 Not tainted 4.14.71+ #8
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
 panic+0x1bf/0x3a4 kernel/panic.c:181
 __warn.cold.7+0x148/0x185 kernel/panic.c:542
 report_bug+0x1f7/0x26c lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1ba/0x2c0 arch/x86/kernel/traps.c:295
 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:944
RIP: 0010:perf_trace_buf_alloc.cold.2+0x18/0x2b kernel/trace/trace_event_perf.c:273
RSP: 0018:ffff8801957cfc28 EFLAGS: 00010282
RAX: 000000000000001c RBX: ffff8801c5842400 RCX: 00000000000006b4
RDX: 0000000000000000 RSI: ffffc90002127000 RDI: 0000000000000212
RBP: 0000000000000b44 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801957cfcc0
R13: ffff8801957cfd00 R14: 0000000000000b11 R15: 0000000000000000
 perf_trace_bpf_map_keyval+0x1d2/0x720 include/trace/events/bpf.h:228
 trace_bpf_map_update_elem include/trace/events/bpf.h:274 [inline]
 map_update_elem kernel/bpf/syscall.c:658 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1576 [inline]
 SyS_bpf+0x2ec7/0x3640 kernel/bpf/syscall.c:1547
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457679
RSP: 002b:00007fd8040a3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fd8040a46d4 RCX: 0000000000457679
RDX: 0000000000000020 RSI: 0000000020000140 RDI: 0000000000000002
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004cc2b0 R14: 00000000004bdad3 R15: 0000000000000000
Kernel Offset: 0x19400000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
Rebooting in 86400 seconds..