executing program
syzkaller login: [   25.855428] perf buffer not large enough
[   25.855453] ------------[ cut here ]------------
[   25.856330] WARNING: CPU: 0 PID: 3005 at kernel/trace/trace_event_perf.c:274 perf_trace_buf_alloc+0x12d/0x160
[   25.857289] Kernel panic - not syncing: panic_on_warn set ...
[   25.857289] 
[   25.857945] CPU: 0 PID: 3005 Comm: syzkaller361563 Not tainted 4.13.0-next-20170914+ #4
[   25.858665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
[   25.859459] Call Trace:
[   25.859749]  dump_stack+0x194/0x257
[   25.860116]  ? arch_local_irq_restore+0x53/0x53
[   25.860692]  panic+0x1e4/0x417
[   25.860980]  ? __warn+0x1d9/0x1d9
[   25.861364]  ? show_regs_print_info+0x65/0x65
[   25.861875]  ? perf_trace_buf_alloc+0x12d/0x160
[   25.862363]  __warn+0x1c4/0x1d9
[   25.862647]  ? perf_trace_buf_alloc+0x12d/0x160
[   25.863072]  report_bug+0x211/0x2d0
[   25.863389]  fixup_bug+0x40/0x90
[   25.863631]  do_trap+0x260/0x390
[   25.863875]  do_error_trap+0x120/0x390
[   25.864193]  ? do_trap+0x390/0x390
[   25.864526]  ? perf_trace_buf_alloc+0x12d/0x160
[   25.864882]  ? vprintk_emit+0x3ea/0x590
[   25.865372]  ? find_held_lock+0x39/0x1d0
[   25.865812]  ? trace_hardirqs_off_thunk+0x1a/0x1c
[   25.866354]  do_invalid_op+0x1b/0x20
[   25.866689]  invalid_op+0x18/0x20
[   25.867000] RIP: 0010:perf_trace_buf_alloc+0x12d/0x160
[   25.867534] RSP: 0018:ffff88006ca67760 EFLAGS: 00010286
[   25.868061] RAX: 000000000000001c RBX: 1ffff1000d94cefe RCX: 0000000000000000
[   25.868893] RDX: 000000000000001c RSI: 1ffff1000d94ceac RDI: ffffed000d94cee0
[   25.869660] RBP: ffff88006ca67780 R08: ffff88006ca66e50 R09: 0000000000000000
[   25.870764] R10: ffff88006ba5c440 R11: 0000000000000000 R12: 0000000000000e54
[   25.871452] R13: ffff88006ca67810 R14: ffff88006ca67890 R15: ffff88003d9bccc0
[   25.872135]  perf_trace_bpf_map_keyval+0x260/0xbd0
[   25.872601]  ? lock_downgrade+0x990/0x990
[   25.872988]  ? perf_trace_bpf_map_create+0x9b0/0x9b0
[   25.873452]  ? trace_hardirqs_on+0xd/0x10
[   25.873835]  ? __htab_percpu_map_update_elem+0x6a7/0xa40
[   25.874341]  ? rcu_pm_notify+0xc0/0xc0
[   25.874703]  ? perf_trace_bpf_map_create+0x9b0/0x9b0
[   25.875172]  SyS_bpf+0x33f4/0x46a0
[   25.875509]  ? bpf_prog_get+0x20/0x20
[   25.875872]  ? __lock_is_held+0xbc/0x140
[   25.876270]  ? __fd_install+0x2f7/0x6a0
[   25.876643]  ? __mutex_unlock_slowpath+0xe9/0xac0
[   25.877089]  ? get_unused_fd_flags+0x190/0x190
[   25.877513]  ? do_raw_spin_trylock+0x190/0x190
[   25.877932]  ? add_event_to_ctx+0x14e0/0x14e0
[   25.878349]  ? mark_held_locks+0xb2/0x100
[   25.878729]  ? _raw_spin_unlock_irqrestore+0x31/0xba
[   25.879201]  ? fd_install+0x4d/0x60
[   25.879539]  ? SYSC_perf_event_open+0x4c3/0x2e00
[   25.879973]  ? handle_mm_fault+0x410/0x8d0
[   25.880370]  ? __do_page_fault+0x2b8/0xb60
[   25.880771]  ? perf_event_set_output+0x5a0/0x5a0
[   25.881207]  ? up_read+0x1a/0x40
[   25.881518]  ? __do_page_fault+0x35b/0xb60
[   25.881917]  ? do_page_fault+0xee/0x720
[   25.882287]  ? __do_page_fault+0xb60/0xb60
[   25.882689]  ? entry_SYSCALL_64_fastpath+0x5/0xbe
[   25.883141]  ? trace_hardirqs_on_thunk+0x1a/0x1c
[   25.883587]  entry_SYSCALL_64_fastpath+0x1f/0xbe
[   25.884024] RIP: 0033:0x434fe9
[   25.884323] RSP: 002b:00007ffcb22cada8 EFLAGS: 00000207 ORIG_RAX: 0000000000000141
[   25.885013] RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 0000000000434fe9
[   25.885668] RDX: 0000000000000020 RSI: 000000002000b000 RDI: 0000000000000002
[   25.886321] RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
[   25.886975] R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000000000
[   25.887633] R13: 0000000000401960 R14: 00000000004019f0 R15: 0000000000000000
[   25.888434] Dumping ftrace buffer:
[   25.888808]    (ftrace buffer empty)
[   25.889150] Kernel Offset: disabled
[   25.889488] Rebooting in 86400 seconds..