WARNING: CPU: 0 PID: 8941 at kernel/events/core.c:1835 perf_group_attach+0x3fd/0x4d0 kernel/events/core.c:1835
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8941 Comm: kworker/u4:5 Not tainted 5.2.0-rc5+ #34
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x2cb/0x744 kernel/panic.c:219
 __warn.cold+0x20/0x4d kernel/panic.c:576
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986
RIP: 0010:perf_group_attach+0x3fd/0x4d0 kernel/events/core.c:1835
Code: ff 48 8d 7b 10 48 89 f8 48 c1 e8 03 42 80 3c 28 00 75 57 48 8b 5b 10 48 83 eb 10 49 39 dc 75 d4 e9 20 ff ff ff e8 63 62 ea ff <0f> 0b e9 55 fd ff ff 48 c7 c7 34 1c a1 89 e8 00 e6 23 00 e9 5b fc
RSP: 0018:ffff8880ae809ea8 EFLAGS: 00010006
RAX: ffff888066c76000 RBX: ffff88806c0f7640 RCX: ffffffff81865cf8
RDX: 0000000000010000 RSI: ffffffff8186601d RDI: ffff88806c0f7858
RBP: ffff8880ae809ed8 R08: ffff888066c76000 R09: ffffed1015d013cb
R10: ffffed1015d013ca R11: 0000000000000003 R12: ffff88809b84ad40
R13: ffffe8ffffc15018 R14: 0000000000000000 R15: ffff8880ae83a648
 add_event_to_ctx kernel/events/core.c:2393 [inline]
 __perf_install_in_context+0x4b5/0x960 kernel/events/core.c:2544
 remote_function kernel/events/core.c:86 [inline]
 remote_function+0x129/0x1a0 kernel/events/core.c:66
 flush_smp_call_function_queue+0x147/0x4f0 kernel/smp.c:244
 generic_smp_call_function_single_interrupt+0x13/0x2b kernel/smp.c:193
 smp_call_function_single_interrupt+0x9d/0x450 arch/x86/kernel/smp.c:294
 call_function_single_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:828
 </IRQ>
RIP: 0010:__rcu_read_unlock+0xd8/0x130 kernel/rcu/tree_plugin.h:416
Code: 83 c0 03 38 d0 7c 04 84 d2 75 57 8b 83 74 03 00 00 85 c0 75 5e 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 <84> c0 74 04 3c 03 7e 37 c7 83 70 03 00 00 00 00 00 00 5b 41 5c 5d
RSP: 0018:ffff888066c97cc0 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff04
RAX: 0000000000000000 RBX: ffff888066c76000 RCX: ffffffff8704b391
RDX: 1ffff1100cd8ec6e RSI: ffffffff8704b0ff RDI: ffff888066c76374
RBP: ffff888066c97cd0 R08: ffff888066c76000 R09: ffffed1015d06c80
R10: ffffed1015d06c7f R11: ffff8880ae8363fb R12: ffff888066c76370
R13: 00000000000003b8 R14: 0000000000000001 R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:646 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline]
 batadv_nc_worker+0x208/0x760 net/batman-adv/network-coding.c:718
 process_one_work+0x989/0x1790 kernel/workqueue.c:2269
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x354/0x420 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..