panic: ip6_getpcbopt: unexpected option Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 302340 8396 32767 0x1010 0x2000 0K syz-executor *176331 96427 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352a751) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff3006cedde00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff80000159b4a0,29,33,fffff3006cedde00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff80000159b4a0,29,33,fffff3006cedde00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003bfaba18,ffff80003a3964d0,ffff80003a396420) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3964d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3964d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe767394b40, count: 7 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 *cpu1: ip6_getpcbopt: unexpected option ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352a751) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff3006cedde00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff80000159b4a0,29,33,fffff3006cedde00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff80000159b4a0,29,33,fffff3006cedde00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003bfaba18,ffff80003a3964d0,ffff80003a396420) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3964d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3964d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe767394b40, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a396130 rbx 0xffff80002998ee07 rdx 0xffff8000015a4800 rcx 0xffff80003bfaba18 rax 0xffff80002998dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3886b2b3ed9038ba r11 0x1389afcb121c902f r12 0xffff80002998ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff824b12a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a396120 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=176331 pid=96427 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bfaafb8,0xffff807ffffe6030 process=0xffff80003c3bf510 user=0xffff80003a391000, vmspace=0xfffff3006a6a4b90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53745 40597 70278 32767 2 0x10 syz-executor 8396 302340 24426 32767 7 0x3010 syz-executor 8396 188295 24426 32767 2 0x4081090 syz-executor 66522 261949 32058 32767 3 0x90 nanoslp syz-executor 66522 235585 32058 32767 3 0x4000090 sbwait syz-executor 74003 98809 4299 32767 2 0x10 syz-executor 74003 190490 4299 32767 3 0x4000090 fsleep syz-executor 76719 305786 68831 32767 2 0x10 syz-executor 76719 249076 68831 32767 3 0x4000090 fsleep syz-executor 76719 399768 68831 32767 3 0x4000090 fsleep syz-executor 37738 178242 7037 32767 2 0x10 syz-executor 37738 111411 7037 32767 3 0x4000090 fsleep syz-executor 96427 268504 52265 32767 2 0x10 syz-executor *96427 176331 52265 32767 7 0x4000010 syz-executor 4299 193051 20800 32767 3 0x90 nanoslp syz-executor 68831 213029 46288 32767 3 0x90 nanoslp syz-executor 32058 490183 60539 32767 3 0x90 nanoslp syz-executor 40335 274521 60777 32767 2 0x10 syz-executor 70278 452984 3240 32767 3 0x90 nanoslp syz-executor 52265 54862 44779 32767 3 0x90 nanoslp syz-executor 7037 290751 11198 32767 3 0x90 nanoslp syz-executor 24426 501727 12331 32767 3 0x90 nanoslp syz-executor 11198 191634 46438 0 3 0x82 wait syz-executor 44779 37355 46438 0 3 0x82 wait syz-executor 20800 354980 46438 0 3 0x82 wait syz-executor 12331 219544 46438 0 3 0x82 wait syz-executor 60777 18459 46438 0 3 0x82 wait syz-executor 46288 352875 46438 0 3 0x82 wait syz-executor 60539 81765 46438 0 3 0x82 wait syz-executor 3240 425736 46438 0 3 0x82 wait syz-executor 46438 380081 56833 0 3 0x82 kqread syz-executor 56833 16206 87101 0 3 0x10008a sigsusp ksh 87101 350099 80417 0 3 0x98 kqread sshd-session 80417 133211 56720 0 3 0x92 kqread sshd-session 29019 358265 1 0 3 0x100083 ttyin getty 56720 225123 1 0 3 0x88 kqread sshd 31264 44611 5723 73 3 0x1100090 kqread syslogd 5723 522483 1 0 3 0x100082 sbwait syslogd 33546 479644 1 0 3 0x100080 kqread resolvd 3480 140771 63203 77 3 0x100092 kqread dhcpleased 33571 43982 63203 77 3 0x100092 kqread dhcpleased 63203 348757 1 0 3 0x80 kqread dhcpleased 35363 169337 0 0 3 0x14200 bored smr 25739 186756 0 0 2 0x14200 zerothread 4244 128578 0 0 3 0x14200 aiodoned aiodoned 91730 71684 0 0 3 0x14200 syncer update 25751 290846 0 0 3 0x14200 cleaner cleaner 15033 482218 0 0 3 0x14200 reaper reaper 36119 20004 0 0 3 0x14200 pgdaemon pagedaemon 42483 292449 0 0 3 0x14200 bored viomb 36374 136615 0 0 3 0x40014200 acpi0 acpi0 83813 244008 0 0 3 0x40014200 idle1 63339 364990 0 0 3 0x14200 bored softnet1 52383 95841 0 0 3 0x14200 bored softnet0 54392 258231 0 0 3 0x14200 bored systqmp 30801 190886 0 0 3 0x14200 bored systq 11718 517278 0 0 3 0x14200 tmoslp softclockmp 24259 485963 0 0 3 0x40014200 tmoslp softclock 85867 486323 0 0 3 0x40014200 idle0 1 141484 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 96427 (syz-executor) thread 0xffff80003bfaba18 (176331) exclusive rwlock netlock r = 0 (0xffffffff839554d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sogetopt+0x105 sys/kern/uipc_socket.c:2074 #3 sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 Process 40335 (syz-executor) thread 0xffff807ffffee2b0 (274521) exclusive rrwlock inode r = 0 (0xfffff3006a53e8d8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff3006b048300) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1806 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11047 12018K 12034K 166960K 12138 0 pcb 17 12K 12K 166960K 17 0 rtable 243 6K 7K 166960K 386 0 pf 31 16K 16K 166960K 31 0 ifaddr 42 7K 7K 166960K 44 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 6 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 8K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1354 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 24 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 25 93K 125K 166960K 1225 0 proc 58 99K 180K 166960K 527 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 30 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 374 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 152K 168K 166960K 11898 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 46 92K 111K 166960K 2335 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 11 0K 2K 166960K 27 0 temp 49 9121K 9124K 166960K 5773 0 kqueue 13 20K 24K 166960K 50 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 88 0 84 1 0 1 1 0 8 0 rtentry 176 115 0 2 6 0 6 6 0 8 0 unpcb 144 166 0 151 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 206 0 201 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 9 0 2 1 0 1 1 0 8 0 ipqe 40 14 0 7 1 0 1 1 0 8 0 inpcb 328 409 0 401 2 0 2 2 0 8 1 ip6q 72 5 0 0 1 0 1 1 0 8 0 ip6af 40 6 0 0 1 0 1 1 0 8 0 nd6 152 28 0 1 2 0 2 2 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 503 0 14 31 0 31 31 0 8 0 art_table 40 504 0 14 5 0 5 5 0 8 0 art_node 32 115 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 20 0 10 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 2743 0 1282 92 0 92 92 0 8 0 ffsino 296 2743 0 1282 113 0 113 113 0 8 0 nchpl 144 4120 0 2436 63 0 63 63 0 8 0 vnodes 216 2824 0 0 157 0 157 157 0 8 0 namei 1024 10225 0 10225 1 0 1 1 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 25 0 0 2 0 2 2 0 8 0 scxspl 216 13182 0 13182 9 3 6 6 1 8 6 plimitpl 152 44 0 20 2 0 2 2 0 8 1 sigapl 424 1526 0 1473 7 0 7 7 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 68 0 59 1 0 1 1 0 8 0 pipepl 344 140 0 113 3 0 3 3 0 8 0 fdescpl 528 1510 0 1473 4 0 4 4 0 8 1 filepl 160 3370 0 3165 9 0 9 9 0 8 0 lockfpl 104 64 0 62 1 0 1 1 0 8 0 lockfspl 48 31 0 29 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 36 0 12 1 0 1 1 0 8 0 ucredpl 104 254 0 235 1 0 1 1 0 8 0 zombiepl 144 1473 0 1473 1 0 1 1 0 8 1 processpl 1232 1526 0 1473 5 0 5 5 0 8 0 procpl 664 2668 0 2608 6 0 6 6 0 8 0 sockpl 752 663 0 636 4 0 4 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k128 9344 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 256 0 0 16 0 16 16 0 8 0 bufpl 272 3338 0 102 216 0 216 216 0 8 0 anonpl 32 5191 0 0 42 0 42 42 0 115 0 amapchunkpl 152 37992 0 37364 26 0 26 26 0 158 0 amappl16 200 2258 0 2239 5 3 2 5 0 8 0 amappl15 192 14 0 13 1 0 1 1 0 8 0 amappl14 184 453 0 451 1 0 1 1 0 8 0 amappl13 176 116 0 106 1 0 1 1 0 8 0 amappl12 168 1749 0 1714 2 0 2 2 0 8 0 amappl11 160 19 0 19 2 2 0 1 0 8 0 amappl10 152 61 0 51 1 0 1 1 0 8 0 amappl9 144 286 0 286 1 1 0 1 0 8 0 amappl8 136 94 0 93 1 0 1 1 0 8 0 amappl7 128 147 0 136 1 0 1 1 0 8 0 amappl6 120 151 0 150 1 0 1 1 0 8 0 amappl5 112 95 0 88 1 0 1 1 0 8 0 amappl4 104 269 0 254 1 0 1 1 0 8 0 amappl3 96 8230 0 8111 5 1 4 4 0 8 0 amappl2 88 525 0 475 2 0 2 2 0 8 0 amappl1 80 14456 0 13885 14 1 13 14 0 8 0 amappl 88 11127 0 10954 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1510 0 1473 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1510 0 1473 1 0 1 1 0 8 0 vmmpekpl 168 11000 0 10969 2 0 2 2 0 8 0 vmmpepl 168 94722 0 92712 91 0 91 91 0 357 0 vmsppl 488 1509 0 1473 7 2 5 6 0 8 0 rwobjpl 80 24141 0 23221 22 1 21 22 0 8 0 pdppl 4096 3027 0 2946 111 28 83 97 0 8 2 pvpl 32 12066 0 0 100 2 98 99 0 265 0 pmappl 256 1509 0 1473 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 503 0 32 14 0 14 14 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838faff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 witness_lock(ffffffff83a4af40,1) at witness_lock+0x10 sys/kern/subr_witness.c:1104 msleep_nsec(ffff80003c3bd000,ffff80003c3bcf98,20,ffffffff834b6b8d,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 single_thread_set(ffff80003bfaa2c0,3) at single_thread_set+0x1de sys/kern/kern_sig.c:2336 exit1(ffff80003bfaa2c0,0,0,1) at exit1+0xa3 sys/kern/kern_exit.c:132 sys_exit(ffff80003bfaa2c0,ffff80003a79cde0,ffff80003a79cd30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a79cde0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a79cde0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d40c9ae9aa0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff838faff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 witness_lock(ffffffff83a4af40,1) at witness_lock+0x10 sys/kern/subr_witness.c:1104 msleep_nsec(ffff80003c3bd000,ffff80003c3bcf98,20,ffffffff834b6b8d,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 single_thread_set(ffff80003bfaa2c0,3) at single_thread_set+0x1de sys/kern/kern_sig.c:2336 exit1(ffff80003bfaa2c0,0,0,1) at exit1+0xa3 sys/kern/kern_exit.c:132 sys_exit(ffff80003bfaa2c0,ffff80003a79cde0,ffff80003a79cd30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003a79cde0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a79cde0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d40c9ae9aa0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352a751) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff3006cedde00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff80000159b4a0,29,33,fffff3006cedde00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff80000159b4a0,29,33,fffff3006cedde00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003bfaba18,ffff80003a3964d0,ffff80003a396420) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3964d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3964d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe767394b40, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352a751) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff3006cedde00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff80000159b4a0,29,33,fffff3006cedde00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff80000159b4a0,29,33,fffff3006cedde00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003bfaba18,ffff80003a3964d0,ffff80003a396420) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3964d0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3964d0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe767394b40, count: -8