[Bug 239803] Problem with concurrent transfer of file descriptors

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=239803

Stas Kelvich <stas.kelvich at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |stas.kelvich at gmail.com

--- Comment #2 from Stas Kelvich <stas.kelvich at gmail.com> ---
I've applied patch from bug #227285 on r352207 and it solves the problem.
However dmesg is full of such messages:

```
uma_zalloc_arg: zone "16" with the following non-sleepable locks held:
shared rw unp_link_rwlock (unp_link_rwlock) r = 0 (0xffffffff81f673f0) locked @
/usr/src/sys/kern/uipc_usrreq.c:2610
stack backtrace:
#0 0xffffffff80c3f243 at witness_debugger+0x73
#1 0xffffffff80c40262 at witness_warn+0x442
#2 0xffffffff80f02afb at uma_zalloc_arg+0x3b
#3 0xffffffff80bab2db at malloc+0x9b
#4 0xffffffff80c7b23c at unp_gc+0x2dc
#5 0xffffffff80c31cec at taskqueue_run_locked+0x10c
#6 0xffffffff80c32c68 at taskqueue_thread_loop+0x88
#7 0xffffffff80b90ad4 at fork_exit+0x84
#8 0xffffffff8116c65e at fork_trampoline+0xe
```

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