kernel panic at kern/arch/x86/trap.c:612, from core 1: Damn Damn!  Unhandled trap in the kernel!
Stack Backtrace on Core 1:
#01 [<0xffffffffc200a3b7>] in backtrace at src/kdebug.c:219
#02 [<0xffffffffc2009b7c>] in _panic at src/init.c:266
#03 [<     [inline]     >] in trap_dispatch at arch/x86/trap.c:612
#03 [<0xffffffffc20aa752>] in trap at arch/x86/trap.c:674
16:21:29 executing program 0:
change_vcore(0x7ff, 0x1)
symlink(&(0x7f0000000000)='./file0\x00', 0x8, &(0x7f0000000040)='./file0\x00', 0x8)
fork()
symlink(&(0x7f0000000080)='./file0\x00', 0x8, &(0x7f00000000c0)='./file0\x00', 0x8)
r0 = proc_create(&(0x7f0000000100)='./file0\x00', 0x8, &(0x7f0000000140)='\\\x00', 0x2, 0x0)
r1 = fcntl$F_DUPFD(0xffffffffffffffff, 0x0, 0xffffffffffffff9c, 0x1)
r2 = fcntl$F_DUPFD(0xffffffffffffff9c, 0x0, 0xffffffffffffffff, 0x1)
dup_fds_to(r0, &(0x7f0000000180)=[{r1}, {r2}], 0x2)
symlink(&(0x7f00000001c0)='./file0\x00', 0x8, &(0x7f0000000200)='./file0\x00', 0x8)
munmap(&(0x7f0000ffd000/0x3000)=nil, 0x3000)
llseek(r1, 0x5, 0xff, &(0x7f0000000240), 0x0)
mmap(&(0x7f0000ffc000/0x4000)=nil, 0x4000, 0x3000002, 0x810, r1, 0x2)
link(&(0x7f0000000280)='./file0\x00', 0x8, &(0x7f00000002c0)='./file0\x00', 0x8)
populate_va(&(0x7f0000ffe000/0x2000)=nil, 0x7ff)
fstat(r2, &(0x7f0000000300))
proc_create(&(0x7f0000000380)='./file0\x00', 0x8, &(0x7f00000003c0)='#\x00', 0x2, 0x0)
mkdir(&(0x7f0000000400)='./file0/../file0\x00', 0x11, 0x80)
mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x1000000, 0x2010, 0xffffffffffffffff, 0x2)
fstat(r2, &(0x7f0000000440))
getpcoreid()
fstat(r1, &(0x7f00000004c0))
mmap(&(0x7f0000ffc000/0x1000)=nil, 0x1000, 0x6, 0x110, r1, 0x1)
access(&(0x7f0000000540)='./file0/../file0\x00', 0x11, 0x2)
fwstat(r2, &(0x7f0000000580)=""/154, 0x9a, 0x0)
mkdir(&(0x7f0000000640)='./file0\x00', 0x8, 0x1)
ROS(Core 1)> nbuf 154, STAT_FIX_LEN_9P 49 BIT16SZ 2, GBIT16(buf) 0 This is bad!