panic: m_uiotombuf: progress != total

[Sergey Matveychuk]

Hi.

Just after upgrade from 8.2 to 9.0 kernel panics:

panic: m_uiotombuf: progress != total
cpuid = 1
KDB: enter: panic
[ thread pid 1194 tid 100132 ]
Stopped at      kdb_enter+0x3b: movq    $0,0x913242(%rip)
db> bt
Tracing pid 1194 tid 100132 td 0xfffffe0005c8f8c0
kdb_enter() at kdb_enter+0x3b
panic() at panic+0x180
m_uiotombuf() at m_uiotombuf+0x142
sosend_generic() at sosend_generic+0x2c8
kern_sendit() at kern_sendit+0x191
sendit() at sendit+0xdc
sendmsg() at sendmsg+0x87
syscallenter() at syscallenter+0x1aa
syscall() at syscall+0x4c
Xfast_syscall() at Xfast_syscall+0xdd
--- syscall (28, FreeBSD ELF64, sendmsg), rip = 0x8019ad33c, rsp = 
0x7fffffffd8f8, rbp = 0x7fffffffd930 ---