panic: tcp_output: template len != hdrlen - optlen Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 306838 83253 0 0x2 0x4000000 1 syz-fuzzer *200616 32490 0 0x12 0 0 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82413553) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000ada760) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000ada760) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eae6af8,9,fffffd806d59f600,0,0,ffff800020e41d50) at tcp_usrreq+0xa55 sosend(fffffd806eae6af8,0,ffff800020e639e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020e41d50,4,ffff800020e639e8,0,ffff800020e63ad0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e41d50,ffff800020e63a80,ffff800020e63ad0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63b50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63b50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9300, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic tcp_output: template len != hdrlen - optlen ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82413553) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000ada760) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000ada760) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eae6af8,9,fffffd806d59f600,0,0,ffff800020e41d50) at tcp_usrreq+0xa55 sosend(fffffd806eae6af8,0,ffff800020e639e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020e41d50,4,ffff800020e639e8,0,ffff800020e63ad0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e41d50,ffff800020e63a80,ffff800020e63ad0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63b50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63b50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9300, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e63550 rbx 0xffff800020e63600 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff822db32f kprintf+0x16f r9 0x1 r10 0x2 r11 0x5b47a5a8194e8255 r12 0x3000000008 r13 0xffff800020e63560 r14 0x100 r15 0x1 rip 0xffffffff8237ef78 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e63540 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (sshd) pid=200616 stat=onproc flags process=12 proc=0 pri=24, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e40280,0xffff800020e40500 process=0xffff800020e39350 user=0xffff800020e5e000, vmspace=0xfffffd806e8f9008 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97154 198449 0 0 3 0x14200 acct acct 80919 424981 83253 0 3 0x82 piperd syz-executor.1 38364 350943 83253 0 2 0x2 syz-executor.0 83253 514974 40489 0 3 0x82 thrsleep syz-fuzzer 83253 78344 40489 0 3 0x4000082 nanosleep syz-fuzzer 83253 146597 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 475065 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 343687 40489 0 2 0x4000002 syz-fuzzer 83253 346478 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 287865 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 277801 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 315574 40489 0 3 0x4000082 thrsleep syz-fuzzer 83253 306838 40489 0 7 0x4000002 syz-fuzzer 40489 72253 32490 0 3 0x10008a pause ksh *32490 200616 51359 0 7 0x12 sshd 83876 285725 1 0 3 0x100083 ttyin getty 51359 224991 1 0 3 0x80 select sshd 18086 15185 23929 74 3 0x100092 bpf pflogd 23929 329295 1 0 3 0x80 netio pflogd 94940 303179 36949 73 3 0x100090 kqread syslogd 36949 302532 1 0 3 0x100082 netio syslogd 38675 363262 1 77 3 0x100090 poll dhclient 50282 340093 1 0 3 0x80 poll dhclient 73704 482754 0 0 3 0x14200 bored smr 84095 127396 0 0 3 0x14200 pgzero zerothread 40238 285020 0 0 3 0x14200 aiodoned aiodoned 59618 449871 0 0 3 0x14200 syncer update 56305 267980 0 0 3 0x14200 cleaner cleaner 34246 300752 0 0 3 0x14200 reaper reaper 10751 312767 0 0 3 0x14200 pgdaemon pagedaemon 61113 156058 0 0 3 0x14200 bored crynlk 84661 146422 0 0 3 0x14200 bored crypto 86887 115921 0 0 3 0x40014200 acpi0 acpi0 78528 408201 0 0 3 0x40014200 idle1 9144 471333 0 0 3 0x14200 bored softnet 97976 447789 0 0 3 0x14200 bored systqmp 45127 470132 0 0 3 0x14200 bored systq 79908 509143 0 0 3 0x40014200 bored softclock 79364 216916 0 0 3 0x40014200 idle0 1 479593 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 38364 (syz-executor.0) thread 0xffff800020ddc278 (350943) exclusive rrwlock inode r = 0 (0xfffffd8077df0c58) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80687964e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 83253 (syz-fuzzer) thread 0xffff800020dddd48 (306838) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828c68b0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 pageflttrap+0x7f sys/arch/amd64/amd64/trap.c:180 #2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:384 #3 recall_trap+0x8 Process 32490 (sshd) thread 0xffff800020e41d50 (200616) exclusive rwlock netlock r = 0 (0xffffffff82726bb8) #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:543 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9505 6418K 7058K 78643K 11412 0 pcb 13 8K 8K 78643K 67 0 rtable 106 4K 4K 78643K 308 0 ifaddr 64 13K 13K 78643K 117 0 counters 43 33K 34K 78643K 57 0 ioctlops 0 0K 4K 78643K 1491 0 iov 0 0K 16K 78643K 36 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1419 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 12 0K 1K 78643K 44 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 4 9K 25K 78643K 247 0 sigio 0 0K 0K 78643K 1 0 proc 61 63K 95K 78643K 474 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 17 0 in_multi 36 2K 2K 78643K 107 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 219 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 113 38K 42K 78643K 1672 0 UVM aobj 8 2K 2K 78643K 8 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 11 0K 0K 78643K 30 0 temp 115 3864K 3928K 78643K 4954 0 kqueue 3 4K 10K 78643K 15 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 7 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 41 0 39 1 0 1 1 0 8 0 rtentry 112 67 0 25 2 0 2 2 0 8 0 unpcb 120 99 0 89 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 642 0 642 1 1 0 1 0 8 0 tcpcb 544 62 0 58 1 0 1 1 0 8 0 inpcb 296 245 0 237 3 1 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 19 0 15 1 0 1 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pffrag 232 4 0 3 1 0 1 1 0 482 0 pffrnode 88 4 0 3 1 0 1 1 0 8 0 pffrent 40 13 0 12 1 0 1 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfstitem 24 33 0 7 1 0 1 1 0 8 0 pfstkey 112 33 0 7 1 0 1 1 0 8 0 pfstate 328 33 0 7 3 0 3 3 0 8 0 pfrule 1360 22 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 267 0 94 13 0 13 13 0 8 1 art_table 32 268 0 94 2 0 2 2 0 8 0 art_node 16 66 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 38 0 28 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1721 0 313 89 0 89 89 0 8 0 ffsino 272 1721 0 313 96 1 95 95 0 8 0 nchpl 144 2318 0 702 62 1 61 61 0 8 1 uvmvnodes 72 1936 0 0 36 0 36 36 0 8 0 vnodes 208 1936 0 0 102 0 102 102 0 8 0 namei 1024 6611 0 6611 2 1 1 1 0 8 1 percpumem 16 39 0 7 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 scxspl 192 6547 0 6547 9 8 1 7 0 8 1 plimitpl 152 33 0 25 1 0 1 1 0 8 0 sigapl 424 463 0 432 4 0 4 4 0 8 0 futexpl 56 4203 0 4203 1 0 1 1 0 8 1 knotepl 112 75 0 56 1 0 1 1 0 8 0 kqueuepl 144 29 0 27 1 0 1 1 0 8 0 pipepl 304 113 0 103 2 1 1 2 0 8 0 fdescpl 496 447 0 432 3 0 3 3 0 8 0 filepl 152 2586 0 2486 6 1 5 5 0 8 1 lockfpl 104 83 0 82 1 0 1 1 0 8 0 lockfspl 48 27 0 26 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 232 0 223 1 0 1 1 0 8 0 zombiepl 144 432 0 432 2 1 1 1 0 8 1 processpl 984 463 0 432 7 2 5 5 0 8 1 procpl 624 902 0 862 4 0 4 4 0 8 0 sockpl 400 387 0 368 4 1 3 3 0 8 1 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 196 0 0 24 0 24 24 0 8 0 mtagpl 96 117 0 0 3 0 3 3 0 8 0 mbufpl 256 411 0 0 25 0 25 25 0 8 0 bufpl 280 3638 0 135 251 0 251 251 0 8 0 anonpl 16 56250 0 40154 80 5 75 79 0 124 10 amapchunkpl 152 2245 0 2105 8 1 7 8 0 158 0 amappl16 192 2026 0 1159 54 8 46 54 0 8 2 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 217 0 211 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 10 0 6 1 0 1 1 0 8 0 amappl11 152 238 0 222 1 0 1 1 0 8 0 amappl10 144 13 0 11 1 0 1 1 0 8 0 amappl9 136 417 0 414 1 0 1 1 0 8 0 amappl8 128 374 0 342 2 0 2 2 0 8 0 amappl7 120 117 0 105 1 0 1 1 0 8 0 amappl6 112 26 0 19 2 1 1 1 0 8 0 amappl5 104 161 0 146 1 0 1 1 0 8 0 amappl4 96 675 0 646 1 0 1 1 0 8 0 amappl3 88 295 0 289 1 0 1 1 0 8 0 amappl2 80 2654 0 2592 2 0 2 2 0 8 0 amappl1 72 19513 0 19086 23 13 10 18 0 8 0 amappl 80 1155 0 1113 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 449 0 432 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 449 0 432 1 0 1 1 0 8 0 vmmpekpl 168 7289 0 7256 2 0 2 2 0 8 0 vmmpepl 168 61059 0 59144 120 26 94 109 0 357 6 vmsppl 368 448 0 432 2 0 2 2 0 8 0 pdppl 4096 905 0 866 7 1 6 6 0 8 0 pvpl 32 183854 0 164709 191 7 184 188 0 265 28 pmappl 232 448 0 432 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 279 0 7 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82413553) at panic+0x15c sys/kern/subr_prf.c:207 tcp_output(ffff800000ada760) at tcp_output+0x2c4b tcp_setpersist sys/netinet/tcp_output.c:1130 [inline] tcp_output(ffff800000ada760) at tcp_output+0x2c4b sys/netinet/tcp_output.c:333 tcp_usrreq(fffffd806eae6af8,9,fffffd806d59f600,0,0,ffff800020e41d50) at tcp_usrreq+0xa55 sosend(fffffd806eae6af8,0,ffff800020e639e8,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff800020e41d50,4,ffff800020e639e8,0,ffff800020e63ad0) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff800020e41d50,ffff800020e63a80,ffff800020e63ad0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e63b50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e63b50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9300, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d70ff0) 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 __mp_lock(ffffffff828c66a8) at __mp_lock+0x28 sys/kern/kern_lock.c:137 __mp_acquire_count(ffffffff828c66a8,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 tsleep(fffffd806e90bd80,118,ffffffff8245e14a,0) at tsleep+0x19b kqueue_sleep(fffffd806e90bd80,0) at kqueue_sleep+0x1a0 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e90bd80,40,c000079698,0,ffff800020dddd48,ffff800020eb934c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dddd48,ffff800020eb93c0,ffff800020eb9410) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020eb9490) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020eb9490) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000079e98, count: 4 ddb{1}> trace x86_ipi_db(ffff800020d70ff0) 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 __mp_lock(ffffffff828c66a8) at __mp_lock+0x28 sys/kern/kern_lock.c:137 __mp_acquire_count(ffffffff828c66a8,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 tsleep(fffffd806e90bd80,118,ffffffff8245e14a,0) at tsleep+0x19b kqueue_sleep(fffffd806e90bd80,0) at kqueue_sleep+0x1a0 sys/kern/kern_event.c:885 kqueue_scan(fffffd806e90bd80,40,c000079698,0,ffff800020dddd48,ffff800020eb934c) at kqueue_scan+0x2b6 sys/kern/kern_event.c:928 sys_kevent(ffff800020dddd48,ffff800020eb93c0,ffff800020eb9410) at sys_kevent+0x464 sys/kern/kern_event.c:640 syscall(ffff800020eb9490) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020eb9490) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000079e98, count: -11