login: witness: shared lock of (rwlock) maddr while exclusively locked panic: excl->share Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 348232 28266 0 0 0x4000000 1 syz-executor *442068 72089 0 0 0x4000000 0K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001586078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001586060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd800f8b1c00,ffffffff839eee58,0,0,ffff80003c471f90,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000014ef100,84,ffff80003c472028) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_stop_listening(ffff8000014ef100,ffff800001586000) at mld6_stop_listening+0x125 sys/netinet6/mld6.c:168 in6_delmulti(ffff8000014ef100) at in6_delmulti+0xb1 sys/netinet6/in6.c:1118 in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 in6_leavegroup sys/netinet6/in6.c:1181 [inline] in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 sys/netinet6/in6.c:916 in6_ifdetach(ffff800001586000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:412 if_setrdomain(ffff800001586000,b) at if_setrdomain+0x280 sys/net/if.c:2109 ifioctl(ffff8000015a8ec8,8020699f,ffff80003c4723d0,ffff8000fffe3cb0) at ifioctl+0x2462 sys/net/if.c:2398 sys_ioctl(ffff8000fffe3cb0,ffff80003c4725b0,ffff80003c472500) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 end trace frame: 0xffff80003c4725a0, count: 0 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 *cpu0: excl->share ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001586078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001586060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd800f8b1c00,ffffffff839eee58,0,0,ffff80003c471f90,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000014ef100,84,ffff80003c472028) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_stop_listening(ffff8000014ef100,ffff800001586000) at mld6_stop_listening+0x125 sys/netinet6/mld6.c:168 in6_delmulti(ffff8000014ef100) at in6_delmulti+0xb1 sys/netinet6/in6.c:1118 in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 in6_leavegroup sys/netinet6/in6.c:1181 [inline] in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 sys/netinet6/in6.c:916 in6_ifdetach(ffff800001586000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:412 if_setrdomain(ffff800001586000,b) at if_setrdomain+0x280 sys/net/if.c:2109 ifioctl(ffff8000015a8ec8,8020699f,ffff80003c4723d0,ffff8000fffe3cb0) at ifioctl+0x2462 sys/net/if.c:2398 sys_ioctl(ffff8000fffe3cb0,ffff80003c4725b0,ffff80003c472500) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4725b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4725b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x43af2f6af30, count: -16 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c471be0 rbx 0xffffffff837e4e07 cpu_info_full_primary+0x2e07 rdx 0xffff800001567f00 rcx 0xffff8000fffe3cb0 rax 0xffffffff837e3ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1798f072e75471be r11 0x1a307d492403a6b6 r12 0xffffffff837e4c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff810e0165 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c471bd0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=442068 pid=72089 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=0xffff8000fffe3a18,0xffff8000fffe2d30 process=0xffff8000fffec4e8 user=0xffff80003c46d000, vmspace=0xfffffd806c96cb88 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28266 70605 93807 0 2 0 syz-executor 28266 348232 93807 0 7 0x4000000 syz-executor 72089 13219 67899 0 2 0 syz-executor *72089 442068 67899 0 7 0x4000000 syz-executor 6447 229314 22977 0 2 0 syz-executor 6447 285827 22977 0 3 0x4000080 kqread syz-executor 50262 369486 22468 0 3 0x80 nanoslp syz-executor 50262 62082 22468 0 3 0x4000080 fsleep syz-executor 50262 504626 22468 0 3 0x4000080 fsleep syz-executor 50262 198109 22468 0 3 0x4000080 fsleep syz-executor 80394 285912 38127 0 3 0x80 nanoslp syz-executor 80394 439675 38127 0 3 0x4000080 msgwait syz-executor 80394 157423 38127 0 3 0x4000080 fsleep syz-executor 57036 35838 59974 0 3 0x80 nanoslp syz-executor 57036 412664 59974 0 3 0x4000080 netacc syz-executor 57036 419378 59974 0 3 0x4000080 fsleep syz-executor 90756 353210 55749 0 3 0x80 nanoslp syz-executor 90756 352342 55749 0 3 0x4000080 fsleep syz-executor 90756 416713 55749 0 3 0x4000080 fsleep syz-executor 90756 10 55749 0 3 0x4000080 kqsel syz-executor 55749 323015 34665 0 3 0x82 nanoslp syz-executor 22977 27865 34665 0 3 0x82 nanoslp syz-executor 22468 216854 34665 0 3 0x82 nanoslp syz-executor 90091 432793 34665 0 2 0x2 syz-executor 59974 400478 34665 0 3 0x82 nanoslp syz-executor 93807 457486 34665 0 3 0x82 nanoslp syz-executor 38127 31848 34665 0 3 0x82 nanoslp syz-executor 67899 26794 34665 0 3 0x82 nanoslp syz-executor 34665 296750 57551 0 3 0x82 kqread syz-executor 57551 163895 47224 0 3 0x10008a sigsusp ksh 47224 9421 15397 0 3 0x98 kqread sshd-session 15397 370059 41329 0 3 0x92 kqread sshd-session 41932 351940 1 0 3 0x100083 ttyin getty 41329 163961 1 0 3 0x88 kqread sshd 74972 389895 10983 74 3 0x1100092 bpf pflogd 10983 510178 1 0 3 0x80 sbwait pflogd 65654 272063 16916 73 3 0x1100090 kqread syslogd 16916 23705 1 0 3 0x100082 sbwait syslogd 1918 66246 1 0 2 0x100080 resolvd 59841 38610 49685 77 2 0x100092 dhcpleased 85109 368842 49685 77 3 0x100092 kqread dhcpleased 49685 263915 1 0 3 0x80 kqread dhcpleased 72172 291413 0 0 3 0x14200 bored smr 15610 68920 0 0 2 0x14200 zerothread 31539 10019 0 0 3 0x14200 aiodoned aiodoned 11089 150643 0 0 3 0x14200 syncer update 48666 495272 0 0 3 0x14200 cleaner cleaner 5484 511845 0 0 3 0x14200 reaper reaper 72804 316612 0 0 3 0x14200 pgdaemon pagedaemon 2020 349949 0 0 3 0x14200 bored viomb 61273 270416 0 0 3 0x40014200 acpi0 acpi0 7524 72034 0 0 3 0x40014200 idle1 89642 309905 0 0 3 0x14200 bored softnet1 25519 474522 0 0 3 0x14200 bored softnet0 17036 249499 0 0 2 0x14200 systqmp 92972 140257 0 0 3 0x14200 bored systq 43635 227510 0 0 3 0x14200 tmoslp softclockmp 70 364939 0 0 3 0x40014200 tmoslp softclock 26575 272137 0 0 3 0x40014200 idle0 1 361004 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 72089 (syz-executor) thread 0xffff8000fffe3cb0 (442068) exclusive rwlock maddr r = 0 (0xffff800001586078) #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 in6_delmulti+0x9d sys/netinet6/in6.c:1116 #3 in6_purgeaddr+0x1d5 in6_leavegroup sys/netinet6/in6.c:1181 [inline] #3 in6_purgeaddr+0x1d5 sys/netinet6/in6.c:916 #4 in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:412 #5 if_setrdomain+0x280 sys/net/if.c:2109 #6 ifioctl+0x2462 sys/net/if.c:2398 #7 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 exclusive rwlock netlock r = 0 (0xffffffff83891cc0) #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 ifioctl+0x244a sys/net/if.c:2397 #3 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83902dc8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ifioctl+0x47f if_unit sys/net/if.c:-1 [inline] #1 ifioctl+0x47f sys/net/if.c:2195 #2 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #3 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #4 Xsyscall+0x128 Process 90091 (syz-executor) thread 0xffff80002a261ca0 (432793) exclusive rrwlock inode r = 0 (0xfffffd806594eb50) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806cc38c60) #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:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11071 12161K 12571K 166960K 12648 0 pcb 19 13K 13K 166960K 51 0 rtable 245 8K 9K 166960K 431 0 pf 37 18K 22K 166960K 59 0 ifaddr 43 7K 7K 166960K 48 0 ifgroup 59 2K 2K 166960K 63 0 sysctl 3 1K 9K 166960K 7 0 counters 72 37K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1581 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1344 85K 85K 166960K 1574 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 11 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 310 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 180K 166960K 546 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 11 0 in_multi 96 7K 7K 166960K 104 0 ether_multi 2 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 396 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 255 159K 173K 166960K 4661 0 UVM aobj 9 2K 2K 166960K 9 0 pinsyscall 42 84K 106K 166960K 1469 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 18 0 NDP 13 0K 2K 166960K 31 0 temp 39 8670K 8738K 166960K 9837 0 kqueue 16 26K 28K 166960K 56 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 47 0 43 1 0 1 1 0 8 0 rtentry 176 113 0 7 6 0 6 6 0 8 0 unpcb 144 236 0 217 4 0 4 4 0 8 3 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpqe 32 6 0 6 1 0 1 1 0 8 1 tcpcb 736 38 0 33 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 277 0 264 10 1 9 10 0 8 7 nd6 152 24 0 1 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 4 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 2 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 pfstitem 24 30 0 0 1 0 1 1 0 8 0 pfstkey 128 33 0 3 1 0 1 1 0 8 0 pfstate 448 32 0 2 4 0 4 4 0 8 0 pfrule 1344 21 0 16 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 256 453 0 0 29 0 29 29 0 8 0 art_table 40 455 0 0 5 0 5 5 0 8 0 art_node 32 113 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1949 0 436 96 0 96 96 0 8 0 ffsino 296 1949 0 436 118 0 118 118 0 8 1 nchpl 144 2386 0 685 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2128 0 0 119 0 119 119 0 8 0 namei 1024 7590 0 7589 2 0 2 2 0 8 1 percpumem 16 55 0 4 1 0 1 1 0 8 0 kstatmem 264 34 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 12364 0 12364 9 1 8 8 1 8 8 plimitpl 152 54 0 36 1 0 1 1 0 8 0 sigapl 424 628 0 581 7 0 7 7 0 8 1 knotepl 120 789 0 0 24 0 24 24 0 8 0 kqueuepl 224 135 0 120 5 0 5 5 0 8 4 pipepl 344 137 0 110 3 0 3 3 0 8 0 fdescpl 528 612 0 581 3 0 3 3 0 8 0 filepl 160 3012 0 2782 18 1 17 18 0 8 7 lockfpl 104 130 0 128 1 0 1 1 0 8 0 lockfspl 48 29 0 27 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 438 0 425 1 0 1 1 0 8 0 zombiepl 144 581 0 581 1 0 1 1 0 8 1 processpl 1232 628 0 581 5 0 5 5 0 8 1 procpl 664 923 0 863 6 0 6 6 0 8 0 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 567 0 531 13 2 11 13 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 148 0 0 10 0 10 10 0 8 0 bufpl 280 4981 0 130 347 0 347 347 0 8 0 anonpl 32 10101 0 0 82 0 82 82 0 246 0 amapchunkpl 152 14223 0 13694 29 0 29 29 0 158 6 amappl16 200 1793 0 1760 24 8 16 24 0 8 7 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 5 0 5 1 1 0 1 0 8 0 amappl13 176 436 0 435 1 0 1 1 0 8 0 amappl12 168 998 0 955 3 0 3 3 0 8 0 amappl11 160 1 0 1 1 1 0 1 0 8 0 amappl10 152 48 0 34 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 37 0 34 1 0 1 1 0 8 0 amappl7 128 80 0 79 1 0 1 1 0 8 0 amappl6 120 273 0 259 1 0 1 1 0 8 0 amappl5 112 118 0 108 1 0 1 1 0 8 0 amappl4 104 428 0 398 1 0 1 1 0 8 0 amappl3 96 2326 0 2228 3 0 3 3 0 8 0 amappl2 88 729 0 654 2 0 2 2 0 8 0 amappl1 80 10278 0 9686 14 0 14 14 0 8 0 amappl 88 3875 0 3698 5 0 5 5 0 92 0 uvmvnodes 80 103 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 8 0 8 2 1 1 1 0 8 1 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 24 612 0 581 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 612 0 581 1 0 1 1 0 8 0 vmmpekpl 168 6716 0 6677 3 0 3 3 0 8 0 vmmpepl 168 46500 0 44569 103 0 103 103 0 357 7 vmsppl 488 611 0 581 5 0 5 5 0 8 1 rwobjpl 80 15483 0 14431 30 0 30 30 0 8 3 pdppl 4096 1232 0 1162 104 30 74 86 0 8 4 pvpl 32 18148 0 0 150 3 147 147 0 265 0 pmappl 256 611 0 581 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 280 0 32 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b4a35) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(ffff800001586078,1,0) at witness_checkorder+0x122c sys/kern/subr_witness.c:854 rw_do_enter_read(ffff800001586060,0) at rw_do_enter_read+0x99 sys/kern/kern_rwlock.c:355 in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 in6_lookupmulti sys/netinet6/in6.c:-1 [inline] in6_hasmulti(fffffd800f8b1cf0,ffff800001586000) at in6_hasmulti+0x41 sys/netinet6/in6.c:1150 ip6_output(fffffd800f8b1c00,ffffffff839eee58,0,0,ffff80003c471f90,0) at ip6_output+0x13bd sys/netinet6/ip6_output.c:507 mld6_sendpkt(ffff8000014ef100,84,ffff80003c472028) at mld6_sendpkt+0x385 sys/netinet6/mld6.c:499 mld6_stop_listening(ffff8000014ef100,ffff800001586000) at mld6_stop_listening+0x125 sys/netinet6/mld6.c:168 in6_delmulti(ffff8000014ef100) at in6_delmulti+0xb1 sys/netinet6/in6.c:1118 in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 in6_leavegroup sys/netinet6/in6.c:1181 [inline] in6_purgeaddr(ffff8000015b1a00) at in6_purgeaddr+0x1d5 sys/netinet6/in6.c:916 in6_ifdetach(ffff800001586000) at in6_ifdetach+0x9e sys/netinet6/in6_ifattach.c:412 if_setrdomain(ffff800001586000,b) at if_setrdomain+0x280 sys/net/if.c:2109 ifioctl(ffff8000015a8ec8,8020699f,ffff80003c4723d0,ffff8000fffe3cb0) at ifioctl+0x2462 sys/net/if.c:2398 sys_ioctl(ffff8000fffe3cb0,ffff80003c4725b0,ffff80003c472500) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c4725b0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4725b0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x43af2f6af30, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 doopenat(ffff8000fffe3250,ffffff9c,200000000080,200,29,ffff80003c444d80) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c444e30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c444e30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12457853d60, count: 8 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 doopenat(ffff8000fffe3250,ffffff9c,200000000080,200,29,ffff80003c444d80) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c444e30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c444e30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x12457853d60, count: -7