./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor520461436

<...>
Warning: Permanently added '10.128.1.103' (ECDSA) to the list of known hosts.
execve("./syz-executor520461436", ["./syz-executor520461436"], 0x7fffc5b89070 /* 10 vars */) = 0
brk(NULL)                               = 0x5555572e4000
brk(0x5555572e4c40)                     = 0x5555572e4c40
arch_prctl(ARCH_SET_FS, 0x5555572e4300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor520461436", 4096) = 27
brk(0x555557305c40)                     = 0x555557305c40
brk(0x555557306000)                     = 0x555557306000
mprotect(0x7f896c0c9000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 3
setsockopt(3, SOL_SOCKET, SO_REUSEPORT, [-121], 4) = 0
listen(3, 0)                            = 0
exit_group(0)                           = ?
[   47.408193][ T3605] 
[   47.410653][ T3605] =============================
[   47.415561][ T3605] WARNING: suspicious RCU usage
[   47.420409][ T3605] 6.0.0-rc1-syzkaller-00066-g3b06a2755758 #0 Not tainted
[   47.427459][ T3605] -----------------------------
[   47.432312][ T3605] include/net/sock.h:592 suspicious rcu_dereference_check() usage!
[   47.440309][ T3605] 
[   47.440309][ T3605] other info that might help us debug this:
[   47.440309][ T3605] 
[   47.450696][ T3605] 
[   47.450696][ T3605] rcu_scheduler_active = 2, debug_locks = 1
[   47.459057][ T3605] 5 locks held by syz-executor520/3605:
[   47.464616][ T3605]  #0: ffff888074853e10 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280
[   47.475214][ T3605]  #1: ffff888020591930 (sk_lock-AF_INET){+.+.}-{0:0}, at: tcp_close+0x1e/0xc0
[   47.484239][ T3605]  #2: ffffc90001342690 (&h->lhash2[i].lock){+.+.}-{2:2}, at: inet_unhash+0x345/0x680
[   47.493907][ T3605]  #3: ffffffff8d7bc038 (reuseport_lock){+...}-{2:2}, at: reuseport_detach_sock+0x22/0x4a0
[   47.504059][ T3605]  #4: ffff888020591bb8 (clock-AF_INET){++..}-{2:2}, at: bpf_sk_reuseport_detach+0x26/0x190
[   47.514266][ T3605] 
[   47.514266][ T3605] stack backtrace:
[   47.520295][ T3605] CPU: 0 PID: 3605 Comm: syz-executor520 Not tainted 6.0.0-rc1-syzkaller-00066-g3b06a2755758 #0
[   47.530704][ T3605] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
[   47.540767][ T3605] Call Trace:
[   47.544040][ T3605]  <TASK>
[   47.546967][ T3605]  dump_stack_lvl+0xcd/0x134
[   47.551573][ T3605]  bpf_sk_reuseport_detach+0x156/0x190
[   47.557034][ T3605]  reuseport_detach_sock+0x8c/0x4a0
[   47.562235][ T3605]  reuseport_stop_listen_sock+0x6d/0x500
[   47.567864][ T3605]  inet_unhash+0x3b1/0x680
[   47.572274][ T3605]  tcp_set_state+0x198/0x7e0
[   47.576855][ T3605]  ? tcp_wmem_schedule+0x210/0x210
[   47.581961][ T3605]  ? find_held_lock+0x2d/0x110
[   47.586740][ T3605]  ? tcp_close+0x1e/0xc0
[   47.590979][ T3605]  __tcp_close+0xbfd/0xf50
[   47.595393][ T3605]  tcp_close+0x29/0xc0
[   47.599457][ T3605]  inet_release+0x12e/0x270
[   47.604044][ T3605]  __sock_release+0xcd/0x280
[   47.608642][ T3605]  sock_close+0x18/0x20
[   47.612804][ T3605]  __fput+0x277/0x9d0
[   47.616795][ T3605]  ? __sock_release+0x280/0x280
[   47.621676][ T3605]  task_work_run+0xdd/0x1a0
[   47.626219][ T3605]  do_exit+0xad5/0x29b0
[   47.630390][ T3605]  ? mm_update_next_owner+0x7a0/0x7a0
[   47.635775][ T3605]  ? _raw_spin_unlock_irq+0x1f/0x40
[   47.640996][ T3605]  ? _raw_spin_unlock_irq+0x1f/0x40
[   47.646225][ T3605]  do_group_exit+0xd2/0x2f0
[   47.650742][ T3605]  __x64_sys_exit_group+0x3a/0x50
[   47.655772][ T3605]  do_syscall_64+0x35/0xb0
[   47.660198][ T3605]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   47.666187][ T3605] RIP: 0033:0x7f896c05b639
[   47.670611][ T3605] Code: Unable to access opcode bytes at RIP 0x7f896c05b60f.
[   47.677972][ T3605] RSP: 002b:00007fff2f4bcda8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
[   47.686395][ T3605] RAX: ffffffffffffffda RBX: 00007f896c0cf270 RCX: 00007f896c05b639
[   47.694391][ T3605] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
+++ exited with 0 +++
[   47.702368][ T3605] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 00000000000