Warning: Permanently added '10.128.10.4' (ECDSA) to the list of known hosts.
executing program
[   29.394324] 
[   29.395956] ======================================================
[   29.402244] WARNING: possible circular locking dependency detected
[   29.408534] 4.14.287-syzkaller #0 Not tainted
[   29.412997] ------------------------------------------------------
[   29.419305] kworker/u4:0/5 is trying to acquire lock:
[   29.424477]  (sk_lock-AF_INET6){+.+.}, at: [<ffffffff8681e02e>] strp_work+0x3e/0x100
[   29.432340] 
[   29.432340] but task is already holding lock:
[   29.438285]  ((&strp->work)){+.+.}, at: [<ffffffff81364f26>] process_one_work+0x6e6/0x14a0
[   29.446668] 
[   29.446668] which lock already depends on the new lock.
[   29.446668] 
[   29.454954] 
[   29.454954] the existing dependency chain (in reverse order) is:
[   29.462543] 
[   29.462543] -> #1 ((&strp->work)){+.+.}:
[   29.468060]        flush_work+0xad/0x770
[   29.472096]        __cancel_work_timer+0x321/0x460
[   29.477019]        strp_done+0x53/0xd0
[   29.480880]        kcm_ioctl+0x828/0xfb0
[   29.484914]        sock_ioctl+0x2cc/0x4c0
[   29.489037]        do_vfs_ioctl+0x75a/0xff0
[   29.493331]        SyS_ioctl+0x7f/0xb0
[   29.497203]        do_syscall_64+0x1d5/0x640
[   29.501586]        entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   29.507270] 
[   29.507270] -> #0 (sk_lock-AF_INET6){+.+.}:
[   29.513047]        lock_acquire+0x170/0x3f0
[   29.517342]        lock_sock_nested+0xb7/0x100
[   29.521911]        strp_work+0x3e/0x100
[   29.525857]        process_one_work+0x793/0x14a0
[   29.530588]        worker_thread+0x5cc/0xff0
[   29.534969]        kthread+0x30d/0x420
[   29.538826]        ret_from_fork+0x24/0x30
[   29.543030] 
[   29.543030] other info that might help us debug this:
[   29.543030] 
[   29.551145]  Possible unsafe locking scenario:
[   29.551145] 
[   29.557172]        CPU0                    CPU1
[   29.561808]        ----                    ----
[   29.566446]   lock((&strp->work));
[   29.569960]                                lock(sk_lock-AF_INET6);
[   29.576257]                                lock((&strp->work));
[   29.582378]   lock(sk_lock-AF_INET6);
[   29.586158] 
[   29.586158]  *** DEADLOCK ***
[   29.586158] 
[   29.592187] 2 locks held by kworker/u4:0/5:
[   29.596474]  #0:  ("%s""kstrp"){+.+.}, at: [<ffffffff81364ef0>] process_one_work+0x6b0/0x14a0
[   29.605113]  #1:  ((&strp->work)){+.+.}, at: [<ffffffff81364f26>] process_one_work+0x6e6/0x14a0
[   29.613923] 
[   29.613923] stack backtrace:
[   29.618389] CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.287-syzkaller #0
[   29.625715] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
[   29.635048] Workqueue: kstrp strp_work
[   29.638903] Call Trace:
[   29.641467]  dump_stack+0x1b2/0x281
[   29.645066]  print_circular_bug.constprop.0.cold+0x2d7/0x41e
[   29.650840]  __lock_acquire+0x2e0e/0x3f20
[   29.654961]  ? __schedule+0x893/0x1de0
[   29.658831]  ? trace_hardirqs_on+0x10/0x10
[   29.663036]  ? lock_acquire+0x170/0x3f0
[   29.666980]  ? lock_sock_nested+0x98/0x100
[   29.671184]  lock_acquire+0x170/0x3f0
[   29.674957]  ? strp_work+0x3e/0x100
[   29.678558]  lock_sock_nested+0xb7/0x100
[   29.682603]  ? strp_work+0x3e/0x100
[   29.686212]  strp_work+0x3e/0x100
[   29.689639]  process_one_work+0x793/0x14a0
[   29.693856]  ? wo