bash-4.3$ kernel panic at kern/src/ns/chan.c:324, from core 0: cclose 0x0000000000000000
Stack Backtrace on Core 0:
#01 [<0xffffffffc200a3e7>] in backtrace at src/kdebug.c:219
#02 [<0xffffffffc2009bb2>] in _panic at src/init.c:273
#03 [<0xffffffffc2031a9a>] in cclose at src/ns/chan.c:324
#04 [<0xffffffffc2033429>] in walk_symlink at src/ns/chan.c:1695
#05 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#06 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#07 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#08 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#09 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#10 [<0xffffffffc2033414>] in walk_symlink at src/ns/chan.c:1693
#11 [<0xffffffffc2032f32>] in walk at src/ns/chan.c:864
#12 [<0xffffffffc2033609>] in __namec_from at src/ns/chan.c:1131
#13 [<0xffffffffc20341ef>] in namec at src/ns/chan.c:1509
#14 [<0xffffffffc203d8bd>] in sysbind at src/ns/sysfile.c:467
#15 [<0xffffffffc2055a3e>] in sys_nbind at src/syscall.c:2236
#16 [<0xffffffffc20593c9>] in syscall at src/syscall.c:2528
#17 [<0xffffffffc2059584>] in run_local_syscall at src/syscall.c:2563
#18 [<0xffffffffc2059ab9>] in prep_syscalls at src/syscall.c:2583
#19 [<0xffffffffc20ab29a>] in sysenter_callwrapper at arch/x86/trap.c:851