INFO: task syz-executor.0:16396 can't die for more than 143 seconds.
task:syz-executor.0  state:R  running task     stack:25720 pid:16396 ppid:  8446 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4688 [inline]
 __schedule+0xb38/0x58c0 kernel/sched/core.c:5945
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6333
 irqentry_exit+0x31/0x80 kernel/entry/common.c:426
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:lock_acquire+0x1ef/0x740 kernel/locking/lockdep.c:5480
Code: 97 a6 7e 83 f8 01 0f 85 fc 03 00 00 9c 58 f6 c4 02 0f 85 e7 03 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24
RSP: 0018:ffffc900025ff728 EFLAGS: 00000206
RAX: dffffc0000000000 RBX: 1ffff920004bfee7 RCX: 00000000d5e8c60d
RDX: 1ffff110039e2144 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff90438967
R10: fffffbfff208712c R11: 0000000000000000 R12: 0000000000000002
R13: ffffffff8c17afe0 R14: 0000000000000000 R15: 0000000000000000
 rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
 rcu_read_lock include/linux/rcupdate.h:687 [inline]
 inet_twsk_purge+0x117/0x7d0 net/ipv4/inet_timewait_sock.c:268
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:178
 setup_net+0x639/0xa30 net/core/net_namespace.c:356
 copy_net_ns+0x319/0x760 net/core/net_namespace.c:474
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 copy_namespaces+0x391/0x450 kernel/nsproxy.c:178
 copy_process+0x2c5f/0x7120 kernel/fork.c:2119
 kernel_clone+0xe7/0xac0 kernel/fork.c:2506
 __do_sys_clone3+0x1dd/0x2f0 kernel/fork.c:2781
 do_syscall_64+0x31/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665d9
RSP: 002b:00007f846f73c188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000240
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffdaa7a53cf R14: 00007f846f73c300 R15: 0000000000022000
INFO: task syz-executor.0:16397 can't die for more than 144 seconds.
task:syz-executor.0  state:R  running task     stack:25896 pid:16397 ppid:  8446 flags:0x00004004
Call Trace:
 context_switch kernel/sched/core.c:4688 [inline]
 __schedule+0xb38/0x58c0 kernel/sched/core.c:5945
 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6333
 irqentry_exit+0x31/0x80 kernel/entry/common.c:426
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647
RIP: 0010:lock_acquire+0x1ef/0x740 kernel/locking/lockdep.c:5480
Code: Unable to access opcode bytes at RIP 0x1ffff920004cbebd.
RSP: 0000:00000000ffffffff EFLAGS: ffff8880203e26a8 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: ffff8880203e1c80 RCX: 0000000000000000
RDX: ffffed100407c390 RSI: ffffffff891edace RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: ffff8880203e1c80 R11: deafa394131d8300 R12: 0000000000000000
==================================================================
BUG: KASAN: stack-out-of-bounds in __show_regs.cold+0x23c/0x508 arch/x86/kernel/process_64.c:88
Read of size 8 at addr ffffc9000265f680 by task khungtaskd/1640

CPU: 0 PID: 1640 Comm: khungtaskd Not tainted 5.13.0-rc1-next-20210514-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x13e/0x1d6 lib/dump_stack.c:129
 print_address_description.constprop.0.cold+0xf/0x309 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:436
 __show_regs.cold+0x23c/0x508 arch/x86/kernel/process_64.c:88
 show_trace_log_lvl+0x25b/0x2ba arch/x86/kernel/dumpstack.c:298
 sched_show_task kernel/sched/core.c:8169 [inline]
 sched_show_task+0x428/0x5a0 kernel/sched/core.c:8143
 check_killed_task kernel/hung_task.c:184 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:242 [inline]
 watchdog.cold+0xd8/0x248 kernel/hung_task.c:339
 kthread+0x3b1/0x4a0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294


Memory state around the buggy address:
 ffffc9000265f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000265f600: 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00
>ffffc9000265f680: f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffffc9000265f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000265f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================