======================================
| [   65.783985][  T882] ==================================================================
| [ 65.784253][ T882] BUG: KASAN: slab-use-after-free in account_kernel_stack.isra.0 (kernel/fork.c:444) 
| [   65.784541][  T882] Read of size 8 at addr ffff888001926740 by task timeout/882
| [   65.784789][  T882]
[   65.784879][  T882] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[   65.784881][  T882] Call Trace:
[   65.784883][  T882]  <TASK>
[ 65.784885][ T882] dump_stack_lvl (lib/dump_stack.c:123) 
[ 65.784892][ T882] print_address_description.constprop.0 (mm/kasan/report.c:409) 
[ 65.784898][ T882] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 65.784901][ T882] print_report (mm/kasan/report.c:522) 
[ 65.784904][ T882] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 65.784907][ T882] ? kasan_addr_to_slab (./include/linux/mm.h:1178 mm/kasan/../slab.h:211 mm/kasan/common.c:38) 
[ 65.784913][ T882] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 65.784916][ T882] kasan_report (mm/kasan/report.c:636) 
[ 65.784919][ T882] ? account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 65.784925][ T882] account_kernel_stack.isra.0 (kernel/fork.c:444) 
[ 65.784929][ T882] do_exit (./include/linux/sched/task_stack.h:33 kernel/exit.c:789 kernel/exit.c:849 kernel/exit.c:998) 
[ 65.784935][ T882] ? __pfx_do_exit (kernel/exit.c:897) 
[ 65.784939][ T882] ? do_group_exit (./include/linux/spinlock.h:402 kernel/exit.c:1101) 
[ 65.784941][ T882] ? __lock_release (kernel/locking/lockdep.c:5539) 
[ 65.784946][ T882] ? rcu_is_watching (./include/linux/context_tracking.h:128 kernel/rcu/tree.c:745) 
[ 65.784952][ T882] do_group_exit (kernel/exit.c:1085) 
[ 65.784956][ T882] __x64_sys_exit_group (kernel/exit.c:1113) 
[ 65.784958][ T882] x64_sys_call (arch/x86/entry/syscall_64.c:37) 
[ 65.784963][ T882] do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94) 
[ 65.784968][ T882] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   65.784971][  T882] RIP: 0033:0x7f68948c8abd
[ 65.784975][ T882] Code: Unable to access opcode bytes at 0x7f68948c8a93.

Code starting with the faulting instruction
===========================================
[   65.784977][  T882] RSP: 002b:00007ffe1c977218 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   65.784980][  T882] RAX: ffffffffffffffda RBX: 00007f68949a59c0 RCX: 00007f68948c8abd
[   65.784982][  T882] RDX: 00000000000000e7 RSI: ffffffffffffff80 RDI: 0000000000000004
[   65.784984][  T882] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000020
[   65.784986][  T882] R10: 00007ffe1c9770c0 R11: 0000000000000246 R12: 00007f68949a59c0


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