assert "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/panic: kernel diagnostic assertion

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
assert "tname->un_flags & UNVEIL_USERSET" failed in kern_unveil.c	C			1447	1865d	1868d

1447

1865d

1868d

panic: kernel diagnostic assertion "tname->un_flags & UNVEIL_USERSET" failed: file "/syzkaller/managers/multicore/panic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 689
Stopped at      db_enter+0x18:  addq    $0x8,%rsp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
 475573  28799      0      0x2004  0x4000000    0  syz-executor.0
*293632  87721      0           0  0x4000000    1  syz-executor.1
db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398
panic() at panic+0x174 sys/kern/subr_prf.c:208
__assert(ffffffff81f7cec5,ffffffff81f6c058,2b1,ffffffff81f4ee5e) at __assert+0x2e sys/kern/subr_prf.c:155
proc_trampoline_mp() at proc_trampoline_mp+0x13b
end trace frame: 0x0, count: 11
https://www.openbsd.org/ddb.html describes the minimum info required in bug
reports.  Insufficient info makes it difficult to find and fix bugs.