login: panic: sbuf_delete called with uninitialized or corrupt sbuf
cpuid = 4
Trace beginning at frame 0xfffff801183a9878
_assert_sbuf_integrity() at _assert_sbuf_integrity+0x42 0xffffffff806a0a12 
_assert_sbuf_integrity() at _assert_sbuf_integrity+0x42 0xffffffff806a0a12 
sbuf_delete() at sbuf_delete+0x1b 0xffffffff806a172b 
sndstat_sysuninit() at sndstat_sysuninit+0x8c 0xffffffff8261d46c 
linker_file_unload() at linker_file_unload+0x3aa 0xffffffff8062437a 
sys_kldunload() at sys_kldunload+0x81 0xffffffff80625381 
Debugger("panic")

CPU4 stopping CPUs: 0x0000002f
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>