panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0c980) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb42648,9,fffffd8066bbec00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb42648,0,ffff800020e8d9a8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d9a8,0,ffff800020e8da90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8da40,ffff800020e8da90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8db10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8db10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3cb0, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd806a971b00+16 0x0!=0x6406335c0e80fdc0 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0c980) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb42648,9,fffffd8066bbec00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb42648,0,ffff800020e8d9a8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d9a8,0,ffff800020e8da90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8da40,ffff800020e8da90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8db10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8db10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3cb0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e8d340 rbx 0xffff800020e8d3f0 rdx 0xffff800020ed1d50 rcx 0 rax 0 r8 0xffffffff8136065f kprintf+0x16f r9 0x1 r10 0x2 r11 0xdb81587b1eb3ada4 r12 0x3000000008 r13 0xffff800020e8d350 r14 0x100 r15 0x1 rip 0xffffffff817718b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e8d330 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=272903 stat=onproc flags process=12 proc=0 pri=24, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed0010,0xffff800020ed0ec0 process=0xffff800020ec8f78 user=0xffff800020e88000, vmspace=0xfffffd806e965458 estcpu=1, cpticks=3, pctcpu=0.1 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71419 41943 18320 0 2 0 syz-executor.0 71419 192299 18320 0 7 0x4000000 syz-executor.0 65733 33721 0 0 3 0x14200 bored sosplice 53378 130821 94763 0 2 0x82 syz-executor.1 18320 67774 94763 0 2 0x482 syz-executor.0 94763 192998 95652 0 3 0x82 thrsleep syz-fuzzer 94763 381451 95652 0 2 0x4000482 syz-fuzzer 94763 25070 95652 0 3 0x4000082 thrsleep syz-fuzzer 94763 338876 95652 0 2 0x4000082 syz-fuzzer 94763 202099 95652 0 3 0x4000082 thrsleep syz-fuzzer 94763 232870 95652 0 3 0x4000082 thrsleep syz-fuzzer 94763 192213 95652 0 3 0x4000082 thrsleep syz-fuzzer 94763 458121 95652 0 3 0x4000082 thrsleep syz-fuzzer 94763 514326 95652 0 2 0x4000082 syz-fuzzer 94763 173283 95652 0 3 0x4000082 thrsleep syz-fuzzer 95652 174537 6316 0 3 0x10008a pause ksh * 6316 272903 3248 0 7 0x12 sshd 56584 81959 1 0 3 0x100083 ttyin getty 3248 137478 1 0 3 0x80 select sshd 35530 307514 43024 74 3 0x100092 bpf pflogd 43024 146529 1 0 3 0x80 netio pflogd 83394 394556 90016 73 3 0x100090 kqread syslogd 90016 257878 1 0 3 0x100082 netio syslogd 31015 301862 1 77 3 0x100090 poll dhclient 57680 332240 1 0 3 0x80 poll dhclient 51377 380114 0 0 3 0x14200 bored smr 16929 201120 0 0 2 0x14200 zerothread 25694 55772 0 0 3 0x14200 aiodoned aiodoned 29105 205808 0 0 3 0x14200 syncer update 63717 132200 0 0 3 0x14200 cleaner cleaner 60409 330282 0 0 3 0x14200 reaper reaper 15720 485977 0 0 3 0x14200 pgdaemon pagedaemon 48603 10465 0 0 3 0x14200 bored crynlk 95840 415943 0 0 3 0x14200 bored crypto 28205 155566 0 0 3 0x40014200 acpi0 acpi0 14932 413623 0 0 3 0x40014200 idle1 3774 75061 0 0 3 0x14200 bored softnet 2835 126402 0 0 3 0x14200 bored systqmp 63838 444575 0 0 3 0x14200 bored systq 48206 11662 0 0 3 0x40014200 bored softclock 8064 423494 0 0 3 0x40014200 idle0 1 518694 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 6316 (sshd) thread 0xffff800020ed1d50 (272903) exclusive rwlock netlock r = 0 (0xffffffff824a2978) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:537 #3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9523 6418K 6742K 78643K 11027 0 pcb 13 8K 8K 78643K 1783 0 rtable 91 4K 4K 78643K 693 0 ifaddr 76 14K 15K 78643K 184 0 counters 43 33K 34K 78643K 57 0 ioctlops 0 0K 4K 78643K 1533 0 iov 0 0K 16K 78643K 59 0 mount 1 1K 1K 78643K 1 0 vnodes 1213 76K 77K 78643K 1358 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1970 0 sigio 0 0K 0K 78643K 6 0 proc 62 63K 95K 78643K 480 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 43 0 in_multi 53 3K 3K 78643K 136 0 ether_multi 1 0K 0K 78643K 34 0 mrt 0 0K 0K 78643K 196 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 232 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 146 57K 57K 78643K 6743 0 UVM aobj 30 2K 2K 78643K 42 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1295 0 NDP 13 0K 0K 78643K 24 0 temp 124 3047K 3111K 78643K 6776 0 kqueue 3 4K 10K 78643K 22 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 62 0 60 1 0 1 1 0 8 0 rtentry 112 110 0 76 2 0 2 2 0 8 0 unpcb 120 354 0 344 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 116 0 116 1 1 0 1 0 8 0 tcpcb 544 1363 0 1359 1 0 1 1 0 8 0 inpcb 280 4419 0 4412 2 1 1 2 0 8 0 rttmr 72 59 0 59 3 3 0 1 0 8 0 nd6 48 7 0 5 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 ppxss 1128 3 0 3 3 2 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 92 0 92 1 1 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 48 0 34 1 0 1 1 0 8 0 pfstkey 112 48 0 34 2 0 2 2 0 8 0 pfstate 328 48 0 34 4 1 3 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 231 0 60 13 2 11 12 0 8 0 art_table 32 232 0 60 2 0 2 2 0 8 0 art_node 16 109 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 33 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 16 0 6 1 0 1 1 0 8 0 shmpl 112 40 0 12 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3489 0 2086 89 0 89 89 0 8 0 ffsino 272 3489 0 2086 94 0 94 94 0 8 0 nchpl 144 6531 0 4933 60 0 60 60 0 8 0 uvmvnodes 72 3621 0 0 66 0 66 66 0 8 0 vnodes 208 3621 0 0 191 0 191 191 0 8 0 namei 1024 18361 0 18361 2 1 1 1 0 8 1 percpumem 16 39 0 7 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 16923 0 16923 9 8 1 7 0 8 1 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 424 2186 0 2154 4 0 4 4 0 8 0 futexpl 56 25631 0 25631 2 1 1 1 0 8 1 knotepl 112 86 0 67 1 0 1 1 0 8 0 kqueuepl 144 572 0 570 1 0 1 1 0 8 0 pipelkpl 48 185 0 175 1 0 1 1 0 8 0 pipepl 120 370 0 351 1 0 1 1 0 8 0 fdescpl 496 2170 0 2154 3 0 3 3 0 8 0 filepl 152 11892 0 11792 5 0 5 5 0 8 1 lockfpl 104 66 0 65 1 0 1 1 0 8 0 lockfspl 48 25 0 24 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 162 0 151 1 0 1 1 0 8 0 ucredpl 96 459 0 450 1 0 1 1 0 8 0 zombiepl 144 2154 0 2154 1 0 1 1 0 8 1 processpl 984 2186 0 2154 5 0 5 5 0 8 0 procpl 624 5936 0 5894 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 4840 0 4821 6 3 3 4 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 170 0 0 21 0 21 21 0 8 0 mtagpl 80 24 0 0 1 0 1 1 0 8 0 mbufpl 256 282 0 0 16 0 16 16 0 8 0 bufpl 280 5641 0 136 394 0 394 394 0 8 0 anonpl 16 167205 0 153237 77 18 59 73 0 124 0 amapchunkpl 152 10740 0 10610 10 3 7 10 0 158 0 amappl16 192 9205 0 8422 55 15 40 50 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 1034 0 1029 1 0 1 1 0 8 0 amappl13 168 1044 0 1041 1 0 1 1 0 8 0 amappl12 160 12 0 7 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 945 0 939 1 0 1 1 0 8 0 amappl9 136 384 0 383 1 0 1 1 0 8 0 amappl8 128 402 0 352 2 0 2 2 0 8 0 amappl7 120 1043 0 1031 1 0 1 1 0 8 0 amappl6 112 27 0 22 1 0 1 1 0 8 0 amappl5 104 1068 0 1052 1 0 1 1 0 8 0 amappl4 96 1506 0 1474 1 0 1 1 0 8 0 amappl3 88 1132 0 1125 1 0 1 1 0 8 0 amappl2 80 16442 0 16373 2 0 2 2 0 8 0 amappl1 72 52044 0 51606 23 13 10 18 0 8 0 amappl 80 6195 0 6152 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 41 0 12 1 0 1 1 0 8 0 uaddrrnd 24 2174 0 2154 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2174 0 2154 1 0 1 1 0 8 0 vmmpekpl 168 19340 0 19309 2 0 2 2 0 8 0 vmmpepl 168 263080 0 261116 115 23 92 104 0 357 3 vmsppl 368 2173 0 2154 2 0 2 2 0 8 0 pdppl 4096 4356 0 4312 6 0 6 6 0 8 0 pvpl 32 489788 0 472648 183 38 145 176 0 265 3 pmappl 232 2173 0 2154 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 266 0 9 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff824abff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,5f) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,5f) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,5f) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(5f) at cnputc+0x4c sys/dev/cons.c:239 kputchar(5f,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff821f8365) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f8365) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82252226,ffffffff8223fa27,29e,ffffffff82220a7a) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 4 ddb{0}> trace x86_ipi_db(ffffffff824abff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 x86_bus_space_io_write_1(3f8,0,5f) at x86_bus_space_io_write_1+0x45 sys/arch/amd64/amd64/bus_space.c:759 comcnputc(800,5f) at comcnputc+0x131 bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,5f) at comcnputc+0x131 sys/dev/ic/com.c:1254 cnputc(5f) at cnputc+0x4c sys/dev/cons.c:239 kputchar(5f,5,0) at kputchar+0x219 sys/kern/subr_prf.c:343 kprintf() at kprintf+0x1b7c sys/kern/subr_prf.c:1052 panic(ffffffff821f8365) at panic+0xf3 vprintf sys/kern/subr_prf.c:528 [inline] panic(ffffffff821f8365) at panic+0xf3 sys/kern/subr_prf.c:197 __assert(ffffffff82252226,ffffffff8223fa27,29e,ffffffff82220a7a) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0c980) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb42648,9,fffffd8066bbec00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb42648,0,ffff800020e8d9a8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d9a8,0,ffff800020e8da90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8da40,ffff800020e8da90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8db10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8db10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3cb0, count: 3 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff821fa911) at panic+0x15c sys/kern/subr_prf.c:207 pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff82649900) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff82649900,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd806d414800,224,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000a0c980) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eb42648,9,fffffd8066bbec00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb42648,0,ffff800020e8d9a8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d9a8,0,ffff800020e8da90) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8da40,ffff800020e8da90) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8db10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8db10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc3cb0, count: -12