uvm_fault(fffffd806b1fbad8,251f9a39000,0,4) at uvm_fault+0x272
upageflttrap(ffff80003c582080,251f9a39ff0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188
usertrap(ffff80003c582080) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436
recall_trap() at recall_trap+0x8
end of kernel
end trace frame: 0x753f6d54cc90, count: -15
ddb{0}> machine ddbcpu 1
Stopped at      db_enter+0x25:  addq    $0x8,%rsp
ddb{1}> trace
db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438
witness_checkorder(fffffd806f184750,9,0) at witness_checkorder+0x1047
rw_do_enter_write(fffffd806f184738,1) at rw_do_enter_write+0xb7 sys/kern/kern_rwlock.c:233
rrw_enter(fffffd806f184738,1) at rrw_enter+0xc6 sys/kern/kern_rwlock.c:616
VOP_LOCK(fffffd805ccc4b48,2001) at VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524
vn_lock(fffffd805ccc4b48,2001) at vn_lock+0xa4 sys/kern/vfs_vnops.c:570
vfs_getcwd_common(fffffd805ccc4b48,fffffd805ccc4b48,0,0,200,0,b18256c286b4ac5f) at vfs_getcwd_common+0xd1 sys/kern/vfs_getcwd.c:287
vn_isunder(fffffd805ccc4b48,fffffd805ccc4b48,ffff8000ffff0f90) at vn_isunder+0x56 sys/kern/vfs_vnops.c:694
unp_externalize(fffffd806b399100,33,0) at unp_externalize+0x286 sys/kern/uipc_usrreq.c:1086
soreceive(ffff8000014bd8c0,ffff80003b0e2318,ffff80003b0e22c8,0,ffff80003b0e2308,ffff80003b0e248c,6abd0abc54e5394b) at soreceive+0xc73 sys/kern/uipc_socket.c:1021
recvit(ffff8000ffff0f90,6,ffff80003b0e2460,0,ffff80003b0e2510) at recvit+0x40a sys/kern/uipc_syscalls.c:1072
sys_recvmsg(ffff8000ffff0f90,ffff80003b0e25c0,ffff80003b0e2510) at sys_recvmsg+0x1bf sys/kern/uipc_syscalls.c:872
syscall(ffff80003b0e25c0) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80003b0e25c0) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x8053774ec10, count: -14