panic: ip6_getpcbopt: unexpected option Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 251705 43815 32767 0x10 0x4000000 0 syz-executor *271838 67084 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352923d) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff90074483a00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fd2338,29,33,fffff90074483a00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fd2338,29,33,fffff90074483a00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003c3e1a18,ffff80003c411af0,ffff80003c411a40) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003c411af0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411af0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a534015730, 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(ffffffff8352923d) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff90074483a00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fd2338,29,33,fffff90074483a00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fd2338,29,33,fffff90074483a00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003c3e1a18,ffff80003c411af0,ffff80003c411a40) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003c411af0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411af0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a534015730, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c411750 rbx 0xffff80002998ee07 rdx 0 rcx 0xffff80003c3e1a18 rax 0xffff80002998dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3312619fbf53b87c r11 0xaf28a0b025b5c591 r12 0xffff80002998ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff82c618b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c411740 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=271838 pid=67084 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3e0028,0xffff80003c3e0fc8 process=0xffff800032f8c020 user=0xffff80003c40c000, vmspace=0xfffff90066370400 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 43815 97079 30003 32767 2 0x10 syz-executor 43815 251705 30003 32767 7 0x4000010 syz-executor 93777 348076 1915 32767 2 0x10 syz-executor 93777 59189 1915 32767 3 0x4000090 fsleep syz-executor 93777 420490 1915 32767 3 0x4000090 fsleep syz-executor 67084 495902 31027 32767 2 0x10 syz-executor *67084 271838 31027 32767 7 0x4000010 syz-executor 67084 498023 31027 32767 3 0x4000090 fsleep syz-executor 47987 491955 35639 32767 3 0x90 nanoslp syz-executor 47987 489703 35639 32767 3 0x4000090 fsleep syz-executor 47987 487503 35639 32767 3 0x4000090 ttyretype syz-executor 47987 347374 35639 32767 3 0x4000090 fsleep syz-executor 4451 351854 3936 32767 3 0x90 nanoslp syz-executor 4451 385445 3936 32767 3 0x4000090 msgwait syz-executor 4451 414883 3936 32767 3 0x4000090 fsleep syz-executor 7008 123159 64994 32767 3 0x90 nanoslp syz-executor 7008 364145 64994 32767 3 0x4000090 kqpoll syz-executor 7008 354156 64994 32767 3 0x4000090 fsleep syz-executor 18847 379192 70887 32767 3 0x90 nanoslp syz-executor 18847 36485 70887 32767 3 0x4000090 kqread syz-executor 18847 160968 70887 32767 3 0x4000090 fsleep syz-executor 21237 380175 17707 32767 2 0x10 syz-executor 21237 443903 17707 32767 3 0x4000090 kqread syz-executor 21237 152907 17707 32767 3 0x4000090 fsleep syz-executor 70887 114037 97520 32767 3 0x90 nanoslp syz-executor 31027 331177 94441 32767 3 0x90 nanoslp syz-executor 1915 266083 17799 32767 3 0x90 nanoslp syz-executor 30003 272667 71432 32767 3 0x90 nanoslp syz-executor 35639 252650 68692 32767 3 0x90 nanoslp syz-executor 64994 86485 97576 32767 3 0x90 nanoslp syz-executor 17707 403663 5918 32767 3 0x90 nanoslp syz-executor 3936 283392 37949 32767 3 0x90 nanoslp syz-executor 97520 17502 6974 0 3 0x82 wait syz-executor 94441 181691 6974 0 3 0x82 wait syz-executor 17799 193159 6974 0 3 0x82 wait syz-executor 68692 289612 6974 0 3 0x82 wait syz-executor 97576 151937 6974 0 3 0x82 wait syz-executor 71432 273515 6974 0 3 0x82 wait syz-executor 5918 187517 6974 0 3 0x82 wait syz-executor 37949 207799 6974 0 3 0x82 wait syz-executor 6974 7261 79326 0 3 0x82 kqread syz-executor 79326 473495 79156 0 3 0x10008a sigsusp ksh 79156 138465 31745 0 3 0x98 kqread sshd-session 31745 301074 70784 0 3 0x92 kqread sshd-session 5401 313545 1 0 3 0x100083 ttyin getty 70784 327846 1 0 3 0x88 kqread sshd 10761 473819 55526 73 3 0x1100090 kqread syslogd 55526 145604 1 0 3 0x100082 sbwait syslogd 54225 490484 1 0 3 0x100080 kqread resolvd 97776 315598 23840 77 3 0x100092 kqread dhcpleased 24165 195184 23840 77 3 0x100092 kqread dhcpleased 23840 482143 1 0 3 0x80 kqread dhcpleased 99056 6602 0 0 3 0x14200 bored smr 34305 26479 0 0 2 0x14200 zerothread 58904 154104 0 0 3 0x14200 aiodoned aiodoned 9715 484352 0 0 3 0x14200 syncer update 89577 5595 0 0 3 0x14200 cleaner cleaner 79973 506930 0 0 3 0x14200 reaper reaper 69555 41230 0 0 3 0x14200 pgdaemon pagedaemon 58167 273127 0 0 3 0x14200 bored viomb 89590 453706 0 0 3 0x40014200 acpi0 acpi0 35293 43234 0 0 3 0x40014200 idle1 24691 36113 0 0 3 0x14200 bored softnet1 44360 28469 0 0 3 0x14200 bored softnet0 93070 217798 0 0 3 0x14200 smrbar systqmp 17058 32343 0 0 3 0x14200 bored systq 80191 433041 0 0 3 0x14200 tmoslp softclockmp 71919 496348 0 0 3 0x40014200 tmoslp softclock 56503 496878 0 0 3 0x40014200 idle0 1 490921 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 43815 (syz-executor) thread 0xffff80003c3e02c0 (251705) exclusive rwlock amaplk r = 0 (0xfffff90062b2e0c8) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff90066370e88) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 67084 (syz-executor) thread 0xffff80003c3e1a18 (271838) exclusive rwlock netlock r = 0 (0xffffffff8394afc0) #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 93070 (systqmp) thread 0xffff807fffffea60 (217798) shared rwlock systqmp r = 0 (0xffffffff8393b688) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11051 12018K 12034K 166960K 12142 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 348 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 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1414 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 26 97K 117K 166960K 161 0 proc 58 99K 147K 166960K 499 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 2 0K 0K 166960K 7 0 in_multi 99 7K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 357 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 285 193K 201K 166960K 3035 0 UVM aobj 5 4K 4K 166960K 5 0 pinsyscall 47 94K 108K 166960K 1231 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 2 0 NDP 27 2K 2K 166960K 27 0 temp 35 9114K 9120K 166960K 3649 0 kqueue 14 22K 24K 166960K 30 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 34 0 31 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 53 0 32 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 12 0 7 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 135 0 123 7 0 7 7 0 8 6 nd6 152 24 0 0 1 0 1 1 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 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 111 0 10 1 0 1 1 0 8 0 semapl 72 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1634 0 172 92 0 92 92 0 8 0 ffsino 296 1634 0 172 113 0 113 113 0 8 0 nchpl 144 1855 0 161 63 0 63 63 0 8 0 vnodes 216 1715 0 0 96 0 96 96 0 8 0 namei 1024 5508 0 5508 2 0 2 2 0 8 2 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 6151 0 6151 4 1 3 3 1 8 3 plimitpl 152 44 0 18 2 0 2 2 0 8 0 sigapl 424 450 0 396 7 0 7 7 0 8 0 knotepl 120 65 0 0 2 0 2 2 0 8 0 kqueuepl 224 30 0 17 1 0 1 1 0 8 0 pipepl 344 120 0 93 3 0 3 3 0 8 0 fdescpl 528 434 0 396 3 0 3 3 0 8 0 filepl 160 1773 0 1547 15 0 15 15 0 8 5 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 26 0 9 1 0 1 1 0 8 0 pgrppl 48 34 0 9 1 0 1 1 0 8 0 ucredpl 104 341 0 322 1 0 1 1 0 8 0 zombiepl 144 396 0 396 1 0 1 1 0 8 1 processpl 1232 450 0 396 5 0 5 5 0 8 0 procpl 664 490 0 420 6 0 6 6 0 8 0 sockpl 752 223 0 187 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 161 0 0 11 0 11 11 0 8 0 bufpl 272 2244 0 102 143 0 143 143 0 8 0 anonpl 32 3621 0 0 30 0 30 30 0 115 0 amapchunkpl 152 8310 0 7680 25 0 25 25 0 158 0 amappl16 200 1858 0 1838 5 0 5 5 0 8 3 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 404 0 403 1 0 1 1 0 8 0 amappl13 176 112 0 102 1 0 1 1 0 8 0 amappl12 168 663 0 626 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 59 0 49 1 0 1 1 0 8 0 amappl9 144 300 0 300 1 0 1 1 0 8 1 amappl8 136 90 0 89 1 0 1 1 0 8 0 amappl7 128 160 0 149 1 0 1 1 0 8 0 amappl6 120 152 0 150 1 0 1 1 0 8 0 amappl5 112 151 0 143 1 0 1 1 0 8 0 amappl4 104 267 0 251 1 0 1 1 0 8 0 amappl3 96 1504 0 1361 5 1 4 4 0 8 0 amappl2 88 518 0 465 2 0 2 2 0 8 0 amappl1 80 10112 0 9538 13 0 13 13 0 8 0 amappl 88 2370 0 2153 5 0 5 5 0 92 0 uvmvnodes 80 97 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 434 0 396 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 396 1 0 1 1 0 8 0 vmmpekpl 168 5384 0 5355 2 0 2 2 0 8 0 vmmpepl 168 37167 0 35059 93 0 93 93 0 357 1 vmsppl 488 433 0 396 7 1 6 6 0 8 0 rwobjpl 80 14245 0 13276 21 0 21 21 0 8 0 pdppl 4096 875 0 792 103 10 93 93 0 8 10 pvpl 32 10004 0 0 81 0 81 81 0 265 0 pmappl 256 433 0 396 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 413 0 13 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8395eff0) 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 __mp_lock(ffffffff83a7f300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a7f300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80003c3e7980) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3e7980) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5827a1e830, count: 9 ddb{0}> trace x86_ipi_db(ffffffff8395eff0) 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 __mp_lock(ffffffff83a7f300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a7f300) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80003c3e7980) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3e7980) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5827a1e830, count: -6 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(ffffffff8352923d) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff90074483a00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fd2338,29,33,fffff90074483a00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fd2338,29,33,fffff90074483a00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003c3e1a18,ffff80003c411af0,ffff80003c411a40) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003c411af0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411af0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a534015730, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8352923d) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffff90074483a00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fd2338,29,33,fffff90074483a00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fd2338,29,33,fffff90074483a00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff80003c3e1a18,ffff80003c411af0,ffff80003c411a40) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003c411af0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c411af0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5a534015730, count: -8