panic: ip6_getpcbopt: unexpected option Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 75831 4179 0 0 0 0 syz-executor *207656 4179 0 0 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83521df8) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffffc806b117b00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fdd4a8,29,33,fffffc806b117b00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fdd4a8,29,33,fffffc806b117b00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff807ffffe9778,ffff80003a3a8890,ffff80003a3a87e0) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3a8890) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3a8890) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2d2ec2fd00, 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(ffffffff83521df8) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffffc806b117b00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fdd4a8,29,33,fffffc806b117b00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fdd4a8,29,33,fffffc806b117b00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff807ffffe9778,ffff80003a3a8890,ffff80003a3a87e0) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3a8890) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3a8890) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2d2ec2fd00, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003a3a84f0 rbx 0xffff80002998ee07 rdx 0xffff8000015dacc0 rcx 0xffff807ffffe9778 rax 0xffff80002998dff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6d294af45b2619fd r11 0x9fb6719c64fa2b7e r12 0xffff80002998ec08 r13 0 r14 0 r15 0x1 rip 0xffffffff821356f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003a3a84e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=207656 pid=4179 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff807ffffe8a80,0xffff807ffffe8030 process=0xffff807ffffec9b8 user=0xffff80003a3a3000, vmspace=0xfffffc806c5277b0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77857 341335 42713 0 2 0 syz-executor 4179 75831 69198 0 7 0 syz-executor * 4179 207656 69198 0 7 0x4000000 syz-executor 55480 506960 1 0 3 0x80 nanoslp init 78593 396980 64821 0 3 0x80 nanoslp syz-executor 78593 286038 64821 0 3 0x4000080 msgwait syz-executor 78593 73856 64821 0 3 0x4000080 fsleep syz-executor 20048 420495 92799 0 3 0x81 nanoslp syz-executor 20048 171619 92799 0 3 0x4000081 ttyopn syz-executor 20048 148443 92799 0 3 0x4000081 fsleep syz-executor 39161 202210 76774 0 3 0x80 nanoslp syz-executor 39161 130212 76774 0 3 0x4000080 kqpoll syz-executor 39161 509148 76774 0 3 0x4000080 fsleep syz-executor 94652 161552 79856 0 3 0x80 nanoslp syz-executor 94652 83210 79856 0 3 0x4000080 semwait syz-executor 68511 280134 28172 60929 3 0x90 nanoslp syz-executor 68511 358363 28172 60929 3 0x4000090 semwait syz-executor 68511 465753 28172 60929 3 0x4000090 fsleep syz-executor 42713 189275 50565 0 3 0x82 nanoslp syz-executor 28172 82766 50565 0 3 0x82 nanoslp syz-executor 64821 130389 50565 0 3 0x82 nanoslp syz-executor 76774 499679 50565 0 3 0x82 nanoslp syz-executor 92799 334985 50565 0 3 0x82 nanoslp syz-executor 79856 510211 50565 0 3 0x82 nanoslp syz-executor 56352 485181 50565 0 2 0x2 syz-executor 69198 401856 50565 0 3 0x82 nanoslp syz-executor 50565 342648 1 0 2 0x2 syz-executor 73644 194197 0 0 3 0x14200 bored smr 38778 72408 0 0 3 0x14200 pgzero zerothread 91140 493891 0 0 3 0x14200 aiodoned aiodoned 17261 53279 0 0 3 0x14200 syncer update 85169 339799 0 0 3 0x14200 cleaner cleaner 42281 211403 0 0 3 0x14200 reaper reaper 43038 160893 0 0 3 0x14200 pgdaemon pagedaemon 99402 253386 0 0 3 0x14200 bored viomb 62287 359680 0 0 3 0x40014200 acpi0 acpi0 20960 475620 0 0 3 0x40014200 idle1 32196 202605 0 0 3 0x14200 bored softnet1 42229 376092 0 0 3 0x14200 bored softnet0 74831 56943 0 0 3 0x14200 bored systqmp 51501 212729 0 0 3 0x14200 bored systq 50118 312136 0 0 3 0x14200 tmoslp softclockmp 19888 67960 0 0 3 0x40014200 tmoslp softclock 37218 394926 0 0 3 0x40014200 idle0 1 473266 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 4179 (syz-executor) thread 0xffff807ffffe9778 (207656) exclusive rwlock netlock r = 0 (0xffffffff83974b30) #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 56352 (syz-executor) thread 0xffff80002a212010 (485181) exclusive rrwlock inode r = 0 (0xfffffc806a561560) #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 (0xfffffc806b3dcc40) #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 11049 12080K 12537K 166960K 12540 0 pcb 17 12K 12K 166960K 79 0 rtable 246 10K 10K 166960K 429 0 pf 36 18K 25K 166960K 141 0 ifaddr 40 7K 8K 166960K 63 0 ifgroup 51 2K 2K 166960K 84 0 sysctl 3 1K 9K 166960K 9 0 counters 68 36K 38K 166960K 106 0 ioctlops 0 0K 4K 166960K 1560 0 iov 0 0K 16K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1289 81K 82K 166960K 1561 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 31 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 61K 89K 166960K 541 0 sigio 0 0K 0K 166960K 6 0 proc 12 17K 180K 166960K 565 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 16 0 in_multi 92 6K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 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 418 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 137 78K 176K 166960K 6286 0 UVM aobj 11 2K 4K 166960K 12 0 pinsyscall 18 36K 103K 166960K 1702 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 28 0 NDP 11 0K 2K 166960K 41 0 temp 52 9122K 9164K 166960K 16325 0 kqueue 1 2K 26K 166960K 51 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 39 0 39 1 0 1 1 0 8 1 rtentry 176 129 0 24 6 0 6 6 0 8 1 unpcb 144 153 0 150 1 0 1 1 0 8 0 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 79 0 77 1 0 1 1 0 8 0 arp 136 20 0 3 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 3 0 3 1 0 1 1 0 8 1 inpcb 328 267 0 263 2 0 2 2 0 8 1 nd6 152 30 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 14 0 14 1 0 1 1 0 8 1 pppxif 1576 3 0 3 1 0 1 1 0 8 1 pfstscr 40 11 0 9 1 0 1 1 0 8 0 pffrag 232 11 0 7 1 0 1 1 0 482 0 pffrnode 88 11 0 7 1 0 1 1 0 8 0 pffrent 40 23 0 19 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 12 0 10 1 0 1 1 0 8 0 pftag 88 7 0 2 1 0 1 1 0 8 0 pfstitem 24 32 0 2 1 0 1 1 0 8 0 pfstkey 128 40 0 10 2 0 2 2 0 8 1 pfstate 448 34 0 5 4 0 4 4 0 8 0 pfrule 1360 42 0 41 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 523 0 76 30 0 30 30 0 8 2 art_table 40 525 0 76 5 0 5 5 0 8 0 art_node 32 129 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 1 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 72 28 0 18 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2138 0 665 93 0 93 93 0 8 0 ffsino 296 2138 0 665 114 0 114 114 0 8 0 nchpl 144 2789 0 1088 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 2372 0 0 132 0 132 132 0 8 0 namei 1024 8094 0 8094 2 0 2 2 0 8 2 percpumem 16 68 0 19 1 0 1 1 0 8 0 kstatmem 264 45 0 20 3 0 3 3 0 8 1 scxspl 216 10984 0 10984 4 3 1 3 1 8 1 plimitpl 152 57 0 48 1 0 1 1 0 8 0 sigapl 424 860 0 825 7 0 7 7 0 8 1 knotepl 120 518 0 0 16 0 16 16 0 8 0 kqueuepl 224 72 0 70 1 0 1 1 0 8 0 pipepl 344 131 0 103 3 0 3 3 0 8 0 fdescpl 528 844 0 825 3 0 3 3 0 8 0 filepl 160 2859 0 2699 10 0 10 10 0 8 0 lockfpl 104 165 0 164 1 0 1 1 0 8 0 lockfspl 48 82 0 81 1 0 1 1 0 8 0 sessionpl 144 37 0 34 1 0 1 1 0 8 0 pgrppl 48 47 0 36 1 0 1 1 0 8 0 ucredpl 104 391 0 387 1 0 1 1 0 8 0 zombiepl 144 825 0 825 1 0 1 1 0 8 1 processpl 1232 860 0 825 5 0 5 5 0 8 1 procpl 664 1343 0 1298 6 0 6 6 0 8 1 sosppl 176 9 0 9 1 0 1 1 0 8 1 sockpl 752 464 0 457 4 0 4 4 0 8 2 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k128 9344 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 175 0 0 11 0 11 11 0 8 0 bufpl 272 4814 0 106 314 0 314 314 0 8 0 anonpl 32 7615 0 0 62 0 62 62 0 115 0 amapchunkpl 152 19629 0 19205 24 1 23 23 0 158 4 amappl16 200 2622 0 2602 14 4 10 14 0 8 7 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 428 0 428 1 0 1 1 0 8 1 amappl13 176 123 0 123 1 0 1 1 0 8 1 amappl12 168 1094 0 1078 2 0 2 2 0 8 0 amappl11 160 36 0 36 1 1 0 1 0 8 0 amappl10 152 62 0 62 1 0 1 1 0 8 1 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 99 0 98 1 0 1 1 0 8 0 amappl7 128 149 0 147 1 0 1 1 0 8 0 amappl6 120 231 0 231 1 0 1 1 0 8 1 amappl5 112 95 0 95 1 0 1 1 0 8 1 amappl4 104 296 0 294 1 0 1 1 0 8 0 amappl3 96 4003 0 3924 4 0 4 4 0 8 1 amappl2 88 548 0 543 2 0 2 2 0 8 0 amappl1 80 12301 0 12207 15 1 14 15 0 8 8 amappl 88 5482 0 5355 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 844 0 825 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 844 0 825 1 0 1 1 0 8 0 vmmpekpl 168 8072 0 8039 2 0 2 2 0 8 0 vmmpepl 168 60745 0 59935 97 0 97 97 0 357 53 vmsppl 488 843 0 825 5 0 5 5 0 8 2 rwobjpl 80 19048 0 18640 27 0 27 27 0 8 8 pdppl 4096 1695 0 1650 95 48 47 83 0 8 2 pvpl 32 15610 0 0 126 0 126 126 0 265 0 pmappl 256 843 0 825 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 590 0 51 16 0 16 16 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838d6ff0) 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 end of kernel end trace frame: 0x71c14f3983a0, count: 12 ddb{0}> trace x86_ipi_db(ffffffff838d6ff0) 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 end of kernel end trace frame: 0x71c14f3983a0, count: -3 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(ffffffff83521df8) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffffc806b117b00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fdd4a8,29,33,fffffc806b117b00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fdd4a8,29,33,fffffc806b117b00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff807ffffe9778,ffff80003a3a8890,ffff80003a3a87e0) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3a8890) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3a8890) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2d2ec2fd00, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83521df8) at panic+0x1e5 sys/kern/subr_prf.c:198 ip6_getpcbopt(0,33,fffffc806b117b00) at ip6_getpcbopt+0x3e3 ip6_ctloutput(0,ffff800010fdd4a8,29,33,fffffc806b117b00) at ip6_ctloutput+0xfb2 sys/netinet6/ip6_output.c:1487 sogetopt(ffff800010fdd4a8,29,33,fffffc806b117b00) at sogetopt+0x128 sys/kern/uipc_socket.c:2074 sys_getsockopt(ffff807ffffe9778,ffff80003a3a8890,ffff80003a3a87e0) at sys_getsockopt+0x1ec sys/kern/uipc_syscalls.c:1263 syscall(ffff80003a3a8890) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a3a8890) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa2d2ec2fd00, count: -8 ddb{1}>