kernel panic at kern/src/ns/chan.c:331, from core 0: cclose 0x0000000000000000
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a2bc>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009afd>] in _panic at src/init.c:268
#03 [<0xffffffffc203186a>] in cclose at src/ns/chan.c:331
#04 [<0xffffffffc2033249>] in walk_symlink at src/ns/chan.c:1702
#05 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#06 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#07 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#08 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#09 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#10 [<0xffffffffc2033234>] in walk_symlink at src/ns/chan.c:1700
#11 [<0xffffffffc2032d52>] in walk at src/ns/chan.c:871
#12 [<0xffffffffc2033429>] in __namec_from at src/ns/chan.c:1138
#13 [<0xffffffffc203400f>] in namec at src/ns/chan.c:1516
#14 [<0xffffffffc203d8bd>] in sysunmount at src/ns/sysfile.c:559
#15 [<0xffffffffc2055bbd>] in sys_nunmount at src/syscall.c:2289
#16 [<0xffffffffc2059439>] in syscall at src/syscall.c:2528
#17 [<0xffffffffc2059604>] in run_local_syscall at src/syscall.c:2563
#18 [<0xffffffffc2059b39>] in prep_syscalls at src/syscall.c:2583
#19 [<0xffffffffc20ab38a>] in sysenter_callwrapper at arch/x86/trap.c:854