login: kernel: double fault trap, code=0
Stopped at      pool_cache_get+0x23:    callq   __sanitizer_cov_trace_pc+0x4
ddb{0}> 
ddb{0}> set $lines = 0
ddb{0}> set $maxwidth = 0
ddb{0}> show panic
the kernel did not panic
ddb{0}> trace
pool_cache_get(ffffffff826666d0) at pool_cache_get+0x23 sys/kern/subr_pool.c:1867
pool_get(ffffffff826666d0,2) at pool_get+0x91 sys/kern/subr_pool.c:572
m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250
sbappendaddr(fffffd8078a417d0,fffffd8078a41858,ffff800020b8e2f8,fffffd8078d82100,0) at sbappendaddr+0x223 sys/kern/uipc_socket2.c:801
udp_sbappend(fffffd8078a40118,fffffd8078d82100,fffffd8078d821b0,0,14,fffffd8078d821c4) at udp_sbappend+0x314 sys/netinet/udp_usrreq.c:629
udp_input(ffff800020b8e578,ffff800020b8e584,11,2) at udp_input+0x1320
ip_deliver(ffff800020b8e578,ffff800020b8e584,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b8e578,ffff800020b8e584,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b8e578,ffff800020b8e584,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd8078d82100) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd8078d82100,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd806b065c00,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd806b065c00,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd806b065c00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd8078d10300,fffffd8078d103b0,0,14,fffffd8078d103c4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b8ec68,ffff800020b8ec74,11,2) at udp_input+0x1320
ip_deliver(ffff800020b8ec68,ffff800020b8ec74,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b8ec68,ffff800020b8ec74,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b8ec68,ffff800020b8ec74,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd8078d10300) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd8078d10300,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd8078d82200,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd8078d82200,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd8078d82200,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd806b065c00,fffffd806b065cb0,0,14,fffffd806b065cc4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b8f358,ffff800020b8f364,11,2) at udp_input+0x1320
ip_deliver(ffff800020b8f358,ffff800020b8f364,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b8f358,ffff800020b8f364,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b8f358,ffff800020b8f364,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd806b065c00) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd806b065c00,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd806b065700,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd806b065700,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd806b065700,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd8078d82200,fffffd8078d822b0,0,14,fffffd8078d822c4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b8fa48,ffff800020b8fa54,11,2) at udp_input+0x1320
ip_deliver(ffff800020b8fa48,ffff800020b8fa54,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b8fa48,ffff800020b8fa54,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b8fa48,ffff800020b8fa54,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd8078d82200) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd8078d82200,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd8078d10400,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd8078d10400,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd8078d10400,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd806b065700,fffffd806b0657b0,0,14,fffffd806b0657c4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b90138,ffff800020b90144,11,2) at udp_input+0x1320
ip_deliver(ffff800020b90138,ffff800020b90144,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b90138,ffff800020b90144,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b90138,ffff800020b90144,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd806b065700) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd806b065700,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd806b065d00,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd806b065d00,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd806b065d00,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd8078d10400,fffffd8078d104b0,0,14,fffffd8078d104c4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b90828,ffff800020b90834,11,2) at udp_input+0x1320
ip_deliver(ffff800020b90828,ffff800020b90834,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b90828,ffff800020b90834,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b90828,ffff800020b90834,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd8078d10400) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd8078d10400,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd806f435300,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd806f435300,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd806f435300,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
somove(fffffd8078a417d0,2) at somove+0xf2f sys/kern/uipc_socket.c:1596
sorwakeup(fffffd8078a417d0) at sorwakeup+0x79 sys/kern/uipc_socket.c:1645
udp_sbappend(fffffd8078a40118,fffffd806b065d00,fffffd806b065db0,0,14,fffffd806b065dc4) at udp_sbappend+0x336 sys/netinet/udp_usrreq.c:635
udp_input(ffff800020b90f18,ffff800020b90f24,11,2) at udp_input+0x1320
ip_deliver(ffff800020b90f18,ffff800020b90f24,11,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668
ip_ours(ffff800020b90f18,ffff800020b90f24,8b,0) at ip_ours+0x412
ip_input_if(ffff800020b90f18,ffff800020b90f24,4,0,ffff800000679800) at ip_input_if+0x6ce
ipv4_input(ffff800000679800,fffffd806b065d00) at ipv4_input+0x48 sys/netinet/ip_input.c:215
if_input_local(ffff800000679800,fffffd806b065d00,2) at if_input_local+0xf9 sys/net/if.c:776
ip_output(fffffd806b065900,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 ip_mloopback sys/netinet/ip_output.c:1715 [inline]
ip_output(fffffd806b065900,0,fffffd8078a40188,0,0,fffffd8078a40118) at ip_output+0xae5 sys/netinet/ip_output.c:329
udp_output(fffffd8078a40118,fffffd806b065900,0,0) at udp_output+0x5af sys/netinet/udp_usrreq.c:1008
sosend(fffffd8078a417d0,0,ffff800020b91290,0,0,0) at sosend+0x671 sys/kern/uipc_socket.c:549
sendit(ffff800020a929d8,0,ffff800020b91370,0,ffff800020b91450) at sendit+0x52b sys/kern/uipc_syscalls.c:657
sys_sendto(ffff800020a929d8,ffff800020b91408,ffff800020b91450) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:522
syscall(ffff800020b914d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline]
syscall(ffff800020b914d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb6157edbb80, count: -84
ddb{0}> show registers
rdi               0xffffffff826666d0    mbpool
rsi                                0
rbp               0xffff800020b8e050
rbx                             0x10
rdx                             0x8b
rcx                              0x1
rax                              0x2
r8                0xffffffff814a3038    sbappendaddr+0xf8
r9                               0x5
r10               0x694bb7e714d99d21
r11               0x26a6a5afe5cd2a93
r12               0xffffffff826666d0    mbpool
r13                                0
r14               0xffffffff826666d0    mbpool
r15                              0x2
rip               0xffffffff82102823    pool_cache_get+0x23
cs                               0x8
rflags                       0x10286    __ALIGN_SIZE+0xf286
rsp               0xffff800020b8dff0
ss                              0x10
pool_cache_get+0x23:    callq   __sanitizer_cov_trace_pc+0x4
ddb{0}>