login: panic: tcp_output: template len != hdrlen - optlen Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *197514 76728 0 0x12 0 1 sshd 297757 22941 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8220dcdf) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000a0c540) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000a0c540) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eb33648,9,fffffd806d77bc00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb33648,0,ffff800020e8d8e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d8e8,0,ffff800020e8d9d0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d980,ffff800020e8d9d0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8da50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8da50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd9000, count: 6 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 tcp_output: template len != hdrlen - optlen ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8220dcdf) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000a0c540) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000a0c540) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eb33648,9,fffffd806d77bc00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb33648,0,ffff800020e8d8e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d8e8,0,ffff800020e8d9d0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d980,ffff800020e8d9d0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8da50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8da50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd9000, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e8d450 rbx 0xffff800020e8d500 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8136065f kprintf+0x16f r9 0x1 r10 0x2 r11 0x6530c315da4ec33b r12 0x3000000008 r13 0xffff800020e8d460 r14 0x100 r15 0x1 rip 0xffffffff817718b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e8d440 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (sshd) pid=197514 stat=onproc flags process=12 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed0760,0xffffffff8267b4d8 process=0xffff800020ec8ba0 user=0xffff800020e88000, vmspace=0xfffffd806e9452e8 estcpu=0, cpticks=0, pctcpu=0.3 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *76728 197514 67126 0 7 0x12 sshd 31343 49260 1 0 3 0x100083 ttyin getty 67126 163088 1 0 3 0x80 select sshd 74514 20962 85089 74 3 0x100092 bpf pflogd 85089 397523 1 0 3 0x80 netio pflogd 32774 395393 91074 73 3 0x100090 kqread syslogd 91074 488887 1 0 3 0x100082 netio syslogd 23313 332093 1 77 3 0x100090 poll dhclient 80483 475132 1 0 3 0x80 poll dhclient 72417 321992 0 0 3 0x14200 bored smr 83107 344682 0 0 3 0x14200 pgzero zerothread 77794 126992 0 0 3 0x14200 aiodoned aiodoned 58276 21422 0 0 3 0x14200 syncer update 95397 510814 0 0 3 0x14200 cleaner cleaner 22941 297757 0 0 7 0x14200 reaper 92145 27785 0 0 3 0x14200 pgdaemon pagedaemon 68628 449886 0 0 3 0x14200 bored crynlk 82501 49327 0 0 3 0x14200 bored crypto 81848 58889 0 0 3 0x40014200 acpi0 acpi0 21640 499262 0 0 3 0x40014200 idle1 57972 104257 0 0 3 0x14200 bored softnet 90889 207154 0 0 3 0x14200 bored systqmp 93319 458419 0 0 3 0x14200 bored systq 1110 122562 0 0 3 0x40014200 bored softclock 59351 485010 0 0 3 0x40014200 idle0 1 433216 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive sched_lock &sched_lock r = 0 (0xffffffff8263f408) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 wakeup_n+0x37 sys/kern/kern_synch.c:589 #2 uvm_pmr_freepageq+0x292 sys/uvm/uvm_pmemrange.c:1317 #3 amap_wipeout+0x1a9 sys/uvm/uvm_amap.c:480 #4 uvm_unmap_detach+0x163 sys/uvm/uvm_map.c:1586 #5 uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 #6 uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 #7 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #8 reaper+0x189 sys/kern/kern_exit.c:456 #9 proc_trampoline+0x1c exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff8264f4d8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_freepageq+0xcb sys/uvm/uvm_pmemrange.c:1298 #4 amap_wipeout+0x1a9 sys/uvm/uvm_amap.c:480 #5 uvm_unmap_detach+0x163 sys/uvm/uvm_map.c:1586 #6 uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 #7 uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 #8 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #9 reaper+0x189 sys/kern/kern_exit.c:456 #10 proc_trampoline+0x1c Process 76728 (sshd) thread 0xffff800020ed1d50 (197514) 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 Process 22941 (reaper) thread 0xffff800020e195f0 (297757) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82695610) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 uvm_unmap_detach+0xe7 sys/uvm/uvm_map.c:1581 #2 uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 #3 uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 #4 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #5 reaper+0x189 sys/kern/kern_exit.c:456 #6 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9463 6393K 6396K 78643K 10560 0 pcb 13 8K 8K 78643K 13 0 rtable 61 2K 2K 78643K 167 0 ifaddr 29 8K 9K 78643K 39 0 counters 39 33K 33K 78643K 41 0 ioctlops 0 0K 4K 78643K 1468 0 mount 1 1K 1K 78643K 1 0 vnodes 1183 74K 75K 78643K 1188 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 1 0K 12K 78643K 18 0 proc 59 63K 83K 78643K 398 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 1K 78643K 22 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 1K 78643K 197 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 54 2K 12K 78643K 948 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 4 0K 0K 78643K 7 0 temp 24 3033K 3097K 78643K 1872 0 kqueue 2 2K 4K 78643K 3 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 4 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 12 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 1 0 1 1 0 8 1 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 34 0 28 1 0 1 1 0 8 0 nd6 48 3 0 3 1 0 1 1 0 8 1 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 11 0 0 1 0 1 1 0 8 0 pfstkey 112 11 0 0 1 0 1 1 0 8 0 pfstate 328 11 0 0 1 0 1 1 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 256 144 0 48 9 0 9 9 0 8 3 art_table 32 145 0 48 2 0 2 2 0 8 1 art_node 16 33 0 13 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1424 0 27 88 0 88 88 0 8 0 ffsino 272 1424 0 27 94 0 94 94 0 8 0 nchpl 144 1644 0 59 60 0 60 60 0 8 0 uvmvnodes 72 1434 0 0 27 0 27 27 0 8 0 vnodes 208 1434 0 0 76 0 76 76 0 8 0 namei 1024 4223 0 4223 1 0 1 1 0 8 1 percpumem 16 31 0 1 1 0 1 1 0 8 0 scxspl 192 3870 0 3870 2 1 1 2 0 8 1 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 424 241 0 215 4 0 4 4 0 8 0 knotepl 112 47 0 42 1 0 1 1 0 8 0 kqueuepl 144 2 0 1 1 0 1 1 0 8 0 pipelkpl 48 77 0 76 1 0 1 1 0 8 0 pipepl 120 154 0 152 1 0 1 1 0 8 0 fdescpl 496 226 0 215 3 0 3 3 0 8 0 filepl 152 1114 0 1071 3 0 3 3 0 8 1 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 10 1 0 1 1 0 8 0 pgrppl 48 19 0 10 1 0 1 1 0 8 0 ucredpl 96 62 0 53 1 0 1 1 0 8 0 zombiepl 144 215 0 214 1 0 1 1 0 8 0 processpl 984 241 0 214 5 0 5 5 0 8 1 procpl 624 249 0 222 3 0 3 3 0 8 0 sockpl 400 80 0 62 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 74 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 128 0 0 8 0 8 8 0 8 0 bufpl 280 2980 0 133 204 0 204 204 0 8 0 anonpl 16 22256 0 21106 13 1 12 12 0 124 5 amapchunkpl 152 862 0 826 4 0 4 4 0 158 2 amappl16 192 148 0 145 2 0 2 2 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 32 0 29 1 0 1 1 0 8 0 amappl13 168 21 0 21 1 0 1 1 0 8 1 amappl12 160 4 0 4 2 1 1 1 0 8 1 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 20 0 18 1 0 1 1 0 8 0 amappl9 136 228 0 227 1 0 1 1 0 8 0 amappl8 128 273 0 272 1 0 1 1 0 8 0 amappl7 120 117 0 109 1 0 1 1 0 8 0 amappl6 112 24 0 24 1 0 1 1 0 8 1 amappl5 104 131 0 117 1 0 1 1 0 8 0 amappl4 96 501 0 476 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 853 0 802 2 0 2 2 0 8 0 amappl1 72 15341 0 14971 23 5 18 18 0 8 8 amappl 80 477 0 458 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 226 0 215 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 226 0 215 1 0 1 1 0 8 0 vmmpekpl 168 6363 0 6343 2 0 2 2 0 8 0 vmmpepl 168 32817 0 32075 76 4 72 72 0 357 32 vmsppl 368 225 0 215 2 0 2 2 0 8 0 pdppl 4096 460 0 430 6 0 6 6 0 8 0 pvpl 32 113574 0 110785 104 0 104 104 0 265 77 pmappl 232 225 0 215 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 233 0 3 7 0 7 7 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 __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 kd_curproc sys/dev/kcov.c:394 [inline] __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 sys/dev/kcov.c:163 msleep(ffffffff82541ac0,ffffffff8248a240,4,ffffffff8227ac05,0) at msleep+0x46 sys/kern/kern_synch.c:214 reaper(ffff800020e195f0) at reaper+0xcb sys/kern/kern_exit.c:427 end trace frame: 0x0, count: 9 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 __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 kd_curproc sys/dev/kcov.c:394 [inline] __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_const_cmp4(400,4) at __sanitizer_cov_trace_const_cmp4+0x11 sys/dev/kcov.c:163 msleep(ffffffff82541ac0,ffffffff8248a240,4,ffffffff8227ac05,0) at msleep+0x46 sys/kern/kern_synch.c:214 reaper(ffff800020e195f0) at reaper+0xcb sys/kern/kern_exit.c:427 end trace frame: 0x0, count: -6 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(ffffffff8220dcdf) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000a0c540) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000a0c540) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eb33648,9,fffffd806d77bc00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb33648,0,ffff800020e8d8e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d8e8,0,ffff800020e8d9d0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d980,ffff800020e8d9d0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8da50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8da50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd9000, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8220dcdf) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000a0c540) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000a0c540) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eb33648,9,fffffd806d77bc00,0,0,ffff800020ed1d50) at tcp_usrreq+0xa55 sosend(fffffd806eb33648,0,ffff800020e8d8e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:549 dofilewritev(ffff800020ed1d50,4,ffff800020e8d8e8,0,ffff800020e8d9d0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020ed1d50,ffff800020e8d980,ffff800020e8d9d0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e8da50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e8da50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd9000, count: -9 ddb{1}>