kernel warning at kern/src/event.c:374, from core 3: [kernel] Null ev_q - kernel code should check before sending!
Stack Backtrace on Core 3:
#01 [<0xffffffffc200a38c>] in backtrace at src/kdebug.c:229
#02 [<0xffffffffc2009bb4>] in _warn at src/init.c:322
#03 [<0xffffffffc2007732>] in send_event at src/event.c:374
#04 [<0xffffffffc2056a45>] in sys_send_event at src/syscall.c:1439
#05 [<0xffffffffc205a019>] in syscall at src/syscall.c:2465
#06 [<0xffffffffc205a1f8>] in run_local_syscall at src/syscall.c:2500
#07 [<0xffffffffc205a739>] in prep_syscalls at src/syscall.c:2520
#08 [<0xffffffffc20abee2>] in sysenter_callwrapper at arch/x86/trap.c:854
kernel panic at kern/arch/x86/trap.c:312, from core 2: Proc-ful Page Fault in the Kernel at 0x000000000000001b!
HW TRAP frame at 0xfffffff0000a0d30 on core 2
  rax  0x0000000000000000
  rbx  0xffff800005f625a0
  rcx  0xfffffff0000a0ea0
  rdx  0x000000000000000a
  rbp  0xfffffff0000a0e38
  rsi  0x0000000000000000
  rdi  0xfffffff0000a0ea0
  r8   0x0000000000000000
  r9   0x0000000000000000
  r10  0x000010000000a4c0
  r11  0x0000000000000202
  r12  0xffff80000218b900
  r13  0x00000000200001c0
  r14  0x0000000000000073
  r15  0x000000000000001d
  trap 0x0000000e Page Fault
  gsbs 0xffffffffc8996080
  fsbs 0x0000000000000000
  err  0x--------00000000
  rip  0xffffffffc2058ab4
  cs   0x------------0008
  flag 0x0000000000010246
  rsp  0xfffffff0000a0df8
  ss   0x------------0010
Backtrace of kernel context on Core 2:
#01 [<0xffffffffc2058ab4>] in sys_readlink at src/syscall.c:1960
#02 [<0xffffffffc205a019>] in syscall at src/syscall.c:2465
#03 [<0xffffffffc205a1f8>] in run_local_syscall at src/syscall.c:2500
#04 [<0xffffffffc205a739>] in prep_syscalls at src/syscall.c:2520
#05 [<0xffffffffc20abee2>] in sysenter_callwrapper at arch/x86/trap.c:854