======================================
| [   20.875968][  T223] ==================================================================
| [ 20.876321][ T223] BUG: KASAN: slab-use-after-free in account_kernel_stack.isra.0 (kernel/fork.c:444) 
| [   20.876717][  T223] Read of size 8 at addr ffff888001926740 by task make/223
| [   20.877083][  T223]
[   20.877219][  T223] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   20.877222][  T223] Call Trace:
[   20.877224][  T223]  <TASK>
[ 20.877227][ T223] dump_stack_lvl (lib/dump_stack.c:123) 
[ 20.877239][ T223] print_address_description.constprop.0 (mm/kasan/report.c:409) 
[ 20.877246][ T223] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 20.877251][ T223] print_report (mm/kasan/report.c:522) 
[ 20.877254][ T223] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 20.877257][ T223] ? kasan_addr_to_slab (./include/linux/mm.h:1178 mm/kasan/../slab.h:211 mm/kasan/common.c:38) 
[ 20.877266][ T223] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 20.877270][ T223] kasan_report (mm/kasan/report.c:636) 
[ 20.877273][ T223] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 20.877279][ T223] account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 20.877283][ T223] do_exit (./include/linux/sched/task_stack.h:33 kernel/exit.c:789 kernel/exit.c:849 kernel/exit.c:998) 
[ 20.877291][ T223] ? __pfx_do_exit (kernel/exit.c:897) 
[ 20.877294][ T223] ? do_group_exit (./include/linux/spinlock.h:402 kernel/exit.c:1101) 
[ 20.877297][ T223] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 20.877306][ T223] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 20.877316][ T223] do_group_exit (kernel/exit.c:1085) 
[ 20.877319][ T223] __x64_sys_exit_group (kernel/exit.c:1113) 
[ 20.877322][ T223] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 20.877329][ T223] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 20.877335][ T223] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   20.877340][  T223] RIP: 0033:0x7f20cd036abd
[ 20.877345][ T223] Code: Unable to access opcode bytes at 0x7f20cd036a93.

Code starting with the faulting instruction
===========================================
[   20.877347][  T223] RSP: 002b:00007ffe821e73f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   20.877352][  T223] RAX: ffffffffffffffda RBX: 00007f20cd1139c0 RCX: 00007f20cd036abd
[   20.877356][  T223] RDX: 00000000000000e7 RSI: ffffffffffffff78 RDI: 0000000000000000
[   20.877358][  T223] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000068
[   20.877360][  T223] R10: 00007ffe821e7200 R11: 0000000000000246 R12: 00007f20cd1139c0


Finger prints:
print_report:kasan_report:do_exit:do_group_exit:__x64_sys_exit_group