kernel panic at kern/src/ns/fs_file.c:431, from core 1: assertion failed: buf == buf_end
Stack Backtrace on Core 1:
#01 [<0xffffffffc200a33c>] in backtrace at src/kdebug.c:220
#02 [<0xffffffffc2009b3d>] in _panic at src/init.c:268
#03 [<0xffffffffc20390fb>] in fs_file_write at src/ns/fs_file.c:431
#04 [<0xffffffffc2044086>] in tree_chan_write at src/ns/tree_file.c:1014
#05 [<0xffffffffc2040321>] in rwrite at src/ns/sysfile.c:1122
#06 [<0xffffffffc204053b>] in syswrite at src/ns/sysfile.c:1140
#07 [<0xffffffffc2056021>] in sys_write at src/syscall.c:1704
#08 [<0xffffffffc2059579>] in syscall at src/syscall.c:2455
#09 [<0xffffffffc2059744>] in run_local_syscall at src/syscall.c:2490
#10 [<0xffffffffc2059c79>] in prep_syscalls at src/syscall.c:2510
#11 [<0xffffffffc20ab5fa>] in sysenter_callwrapper at arch/x86/trap.c:854