Warning: Permanently added '10.128.0.106' (ECDSA) to the list of known hosts.
executing program
[   30.491892] 
[   30.493529] ======================================================
[   30.499818] WARNING: possible circular locking dependency detected
[   30.506106] 4.14.287-syzkaller #0 Not tainted
[   30.510568] ------------------------------------------------------
[   30.516858] kworker/u4:4/2850 is trying to acquire lock:
[   30.522284]  (sk_lock-AF_INET6){+.+.}, at: [<ffffffff8681e02e>] strp_work+0x3e/0x100
[   30.530233] 
[   30.530233] but task is already holding lock:
[   30.536171]  ((&strp->work)){+.+.}, at: [<ffffffff81364f26>] process_one_work+0x6e6/0x14a0
[   30.544566] 
[   30.544566] which lock already depends on the new lock.
[   30.544566] 
[   30.552848] 
[   30.552848] the existing dependency chain (in reverse order) is:
[   30.560439] 
[   30.560439] -> #1 ((&strp->work)){+.+.}:
[   30.565955]        flush_work+0xad/0x770
[   30.569985]        __cancel_work_timer+0x321/0x460
[   30.574884]        strp_done+0x53/0xd0
[   30.578742]        kcm_ioctl+0x828/0xfb0
[   30.582772]        sock_ioctl+0x2cc/0x4c0
[   30.586890]        do_vfs_ioctl+0x75a/0xff0
[   30.591179]        SyS_ioctl+0x7f/0xb0
[   30.595037]        do_syscall_64+0x1d5/0x640
[   30.599415]        entry_SYSCALL_64_after_hwframe+0x46/0xbb
[   30.605092] 
[   30.605092] -> #0 (sk_lock-AF_INET6){+.+.}:
[   30.610874]        lock_acquire+0x170/0x3f0
[   30.615164]        lock_sock_nested+0xb7/0x100
[   30.619716]        strp_work+0x3e/0x100
[   30.623660]        process_one_work+0x793/0x14a0
[   30.628394]        worker_thread+0x5cc/0xff0
[   30.632773]        kthread+0x30d/0x420
[   30.636628]        ret_from_fork+0x24/0x30
[   30.640842] 
[   30.640842] other info that might help us debug this:
[   30.640842] 
[   30.648961]  Possible unsafe locking scenario:
[   30.648961] 
[   30.654988]        CPU0                    CPU1
[   30.659621]        ----                    ----
[   30.664257]   lock((&strp->work));
[   30.667783]                                lock(sk_lock-AF_INET6);
[   30.674079]                                lock((&strp->work));
[   30.680103]   lock(sk_lock-AF_INET6);
[   30.683873] 
[   30.683873]  *** DEADLOCK ***
[   30.683873] 
[   30.689902] 2 locks held by kworker/u4:4/2850:
[   30.694448]  #0:  ("%s""kstrp"){+.+.}, at: [<ffffffff81364ef0>] process_one_work+0x6b0/0x14a0
[   30.703089]  #1:  ((&strp->work)){+.+.}, at: [<ffffffff81364f26>] process_one_work+0x6e6/0x14a0
[   30.711901] 
[   30.711901] stack backtrace:
[   30.716374] CPU: 1 PID: 2850 Comm: kworker/u4:4 Not tainted 4.14.287-syzkaller #0
[   30.723960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
[   30.733301] Workqueue: kstrp strp_work
[   30.737162] Call Trace:
[   30.739722]  dump_stack+0x1b2/0x281
[   30.743321]  print_circular_bug.constprop.0.cold+0x2d7/0x41e
[   30.749089]  __lock_acquire+0x2e0e/0x3f20
[   30.753210]  ? __schedule+0x893/0x1de0
[   30.757068]  ? trace_hardirqs_on+0x10/0x10
[   30.761273]  ? lock_acquire+0x170/0x3f0
[   30.765232]  ? lock_sock_nested+0x98/0x100
[   30.769443]  lock_acquire+0x170/0x3f0
[   30.773227]  ? strp_work+0x3e/0x100
[   30.776828]  lock_sock_nested+0xb7/0x100
[   30.780863]  ? strp_work+0x3e/0x100
[   30.784462]  strp_work+0x3e/0x100
[   30.787888]  process_one_work+0x793/0x14a0
[   30.79209