uvm_fault(0xffffffff8387c790, 0x1, 0, 1) -> e kernel: page fault trap, code=0 Stopped at mld6_fasttimeo+0x133: movzbl 0x1(%rax),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND *301101 6812 0 0x14000 0x40000200 0 softclock mld6_fasttimeo() at mld6_fasttimeo+0x133 mld6_checktimer sys/netinet6/mld6.c:383 [inline] mld6_fasttimeo() at mld6_fasttimeo+0x133 sys/netinet6/mld6.c:363 pffasttimo(ffffffff83977ad0) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83977ad0) at timeout_run+0xc0 sys/kern/kern_timeout.c:-1 softclock_thread(ffff80002a72d710) at softclock_thread+0xe3 sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: 11 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff8387c790, 0x1, 0, 1) -> e ddb> trace mld6_fasttimeo() at mld6_fasttimeo+0x133 mld6_checktimer sys/netinet6/mld6.c:383 [inline] mld6_fasttimeo() at mld6_fasttimeo+0x133 sys/netinet6/mld6.c:363 pffasttimo(ffffffff83977ad0) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83977ad0) at timeout_run+0xc0 sys/kern/kern_timeout.c:-1 softclock_thread(ffff80002a72d710) at softclock_thread+0xe3 sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: -4 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80002a7391c0 rbx 0 rdx 0 rcx 0x1 rax 0 r8 0x21 r9 0 r10 0xbe4fd44ab1c1462b r11 0x8f143438ec5a98a3 r12 0x1 r13 0xffff800001467000 r14 0xffff80000149a800 r15 0 rip 0xffffffff81f1a8d3 mld6_fasttimeo+0x133 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80002a739190 ss 0 mld6_fasttimeo+0x133: movzbl 0x1(%rax),%r15d ddb> show proc PROC (softclock) tid=301101 pid=6812 tcnt=1 stat=onproc flags process=14000 proc=40000200 runpri=0, usrpri=51, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a72d9a0,0xffff80002a72d490 process=0xffff8000ffffda10 user=0xffff80002a734000, vmspace=0xffffffff8387c790 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 99670 72818 67370 0 2 0 syz-executor 99670 506867 67370 0 2 0x4000000 syz-executor 86823 181818 83526 0 2 0 syz-executor 86823 117169 83526 0 3 0x4000080 fsleep syz-executor 46819 371808 18638 0 2 0 syz-executor 46819 311361 18638 0 3 0x4000080 fsleep syz-executor 46819 326353 18638 0 3 0x4000080 fsleep syz-executor 92024 152457 44396 0 2 0 syz-executor 92024 407330 44396 0 3 0x4000080 fsleep syz-executor 92024 407328 44396 0 3 0x4000080 fsleep syz-executor 49311 360660 21616 0 2 0x10 syz-executor 49311 461392 21616 0 3 0x4000090 fsleep syz-executor 49311 418061 21616 0 3 0x4000090 fsleep syz-executor 34464 291860 19506 0 2 0 syz-executor 34464 9248 19506 0 3 0x4000080 fsleep syz-executor 34464 202871 19506 0 3 0x4000080 fsleep syz-executor 20201 138240 39592 60928 2 0x10 syz-executor 20201 181982 39592 60928 2 0x4000010 syz-executor 20201 288916 39592 60928 3 0x4000090 fsleep syz-executor 20201 93656 39592 60928 3 0x4000090 fsleep syz-executor 18638 327226 79432 0 3 0x82 nanoslp syz-executor 11174 34459 0 0 3 0x14200 acct acct 9097 353821 0 0 3 0x14200 bored sosplice 44396 106383 79432 0 2 0x482 syz-executor 83518 5426 79432 0 2 0x482 syz-executor 39592 46467 79432 0 3 0x82 nanoslp syz-executor 21616 68442 79432 0 2 0x482 syz-executor 19506 147527 79432 0 2 0x482 syz-executor 83526 504033 79432 0 3 0x82 nanoslp syz-executor 67370 382766 79432 0 3 0x82 nanoslp syz-executor 79432 245536 16544 0 3 0x82 kqread syz-executor 16544 447947 56191 0 3 0x10008a sigsusp ksh 56191 396757 54897 0 3 0x98 kqread sshd-session 54897 300220 73226 0 3 0x92 kqread sshd-session 99726 418097 1 0 3 0x100083 ttyin getty 73226 434488 1 0 3 0x88 kqread sshd 82091 123458 91752 73 3 0x1100090 kqread syslogd 91752 337205 1 0 3 0x100082 sbwait syslogd 13441 341021 1 0 3 0x100080 kqread resolvd 3822 199342 98478 77 3 0x100092 kqread dhcpleased 8218 57666 98478 77 3 0x100092 kqread dhcpleased 98478 141968 1 0 3 0x80 kqread dhcpleased 86925 449799 0 0 3 0x14200 bored smr 28243 88602 0 0 2 0x14200 zerothread 34555 373621 0 0 3 0x14200 aiodoned aiodoned 23950 18987 0 0 3 0x14200 syncer update 61404 324367 0 0 3 0x14200 cleaner cleaner 84311 154378 0 0 3 0x14200 reaper reaper 9717 372939 0 0 3 0x14200 pgdaemon pagedaemon 49727 297325 0 0 3 0x14200 bored viomb 83987 238617 0 0 3 0x40014200 acpi0 acpi0 5037 38913 0 0 3 0x14200 bored softnet3 44955 56572 0 0 3 0x14200 bored softnet2 27524 141745 0 0 3 0x14200 bored softnet1 2703 367967 0 0 3 0x14200 bored softnet0 57461 41199 0 0 3 0x14200 bored systqmp 48802 355485 0 0 3 0x14200 bored systq * 6812 301101 0 0 7 0x40014200 softclock 68461 511077 0 0 3 0x40014200 idle0 1 287037 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10206 11129K 11690K 166960K 12063 0 pcb 20 14K 16K 166960K 160 0 rtable 249 11K 12K 166960K 469 0 pf 34 13K 18K 166960K 117 0 ifaddr 41 7K 8K 166960K 69 0 ifgroup 50 2K 2K 166960K 103 0 sysctl 4 1K 1K 166960K 4 0 counters 30 17K 17K 166960K 57 0 ioctlops 0 0K 4K 166960K 124 0 iov 0 0K 16K 166960K 38 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1349 85K 85K 166960K 1935 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 20K 20K 166960K 20 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 686 0 sigio 0 0K 0K 166960K 6 0 proc 62 67K 124K 166960K 577 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 82 0 in_multi 98 7K 7K 166960K 122 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 8 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 473 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 252 152K 170K 166960K 8000 0 UVM aobj 16 2K 4K 166960K 18 0 pinsyscall 39 78K 100K 166960K 1769 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 11 0K 2K 166960K 47 0 temp 55 8671K 8748K 166960K 25204 0 kqueue 14 22K 30K 166960K 118 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 141 0 137 3 2 1 3 0 8 0 rtentry 136 133 0 27 4 0 4 4 0 8 0 unpcb 144 802 0 721 9 1 8 8 0 8 5 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpqe 32 3 0 3 2 1 1 1 0 8 1 tcpcb 808 145 0 139 2 0 2 2 0 8 0 arp 88 22 0 6 1 0 1 1 0 8 0 inpcb 344 731 0 719 15 8 7 7 0 8 5 nd6 104 27 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 1 1 1 0 8 1 ppxss 1072 21 0 21 3 2 1 1 0 8 1 pppxif 1384 2 0 2 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 8 0 5 1 0 1 1 0 8 0 pfanchor 1288 6 0 1 1 0 1 1 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstkey 128 4 0 4 1 0 1 1 0 8 1 pfstate 344 2 0 2 1 0 1 1 0 8 1 pfrule 1344 10 0 4 1 0 1 1 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 585 0 126 30 1 29 30 0 8 0 art_table 32 587 0 126 4 0 4 4 0 8 0 art_node 16 131 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 15 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2696 0 1192 95 0 95 95 0 8 0 ffsino 248 2696 0 1192 95 0 95 95 0 8 0 nchpl 144 3667 0 1982 63 0 63 63 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 uvmvnodes 80 2214 0 0 46 0 46 46 0 8 0 vnodes 216 2214 0 0 123 0 123 123 0 8 0 namei 1024 12268 0 12268 3 1 2 2 0 8 2 pfiaddrpl 120 2 0 1 1 0 1 1 0 8 0 kstatmem 264 58 0 36 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 10795 0 10795 9 1 8 8 1 8 8 plimitpl 152 148 0 130 1 0 1 1 0 8 0 sigapl 424 971 0 923 7 1 6 7 0 8 0 futexpl 64 8912 0 8901 2 1 1 1 0 8 0 knotepl 120 128269 0 128212 28 18 10 15 0 8 8 kqueuepl 184 233 0 219 2 1 1 2 0 8 0 pipepl 296 176 0 147 5 0 5 5 0 8 2 fdescpl 440 953 0 923 5 1 4 5 0 8 0 filepl 120 6220 0 5926 19 6 13 13 0 8 4 lockfpl 104 278 0 275 1 0 1 1 0 8 0 lockfspl 48 69 0 66 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 41 0 25 1 0 1 1 0 8 0 ucredpl 104 1195 0 1182 1 0 1 1 0 8 0 zombiepl 144 1242 0 1240 2 1 1 1 0 8 0 processpl 1112 971 0 923 4 0 4 4 0 8 0 procpl 656 1959 0 1895 7 1 6 6 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 528 1717 0 1619 26 15 11 16 0 8 4 mcl64k 65536 17 0 17 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 3177 0 3128 15 7 8 14 0 8 1 mcl2k 2048 625 0 624 2 0 2 2 0 8 1 mtagpl 96 109 0 17 3 0 3 3 0 8 0 mbufpl 256 9964 0 9711 18 0 18 18 0 8 1 bufpl 280 3200 0 125 220 0 220 220 0 8 0 anonpl 24 153605 0 147986 49 2 47 47 0 187 3 amapchunkpl 152 26621 0 26000 54 13 41 41 0 158 15 amappl16 200 2450 0 2340 10 0 10 10 0 8 0 amappl15 192 65 0 65 1 1 0 1 0 8 0 amappl14 184 114 0 104 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1656 0 1626 3 1 2 3 0 8 0 amappl11 160 79 0 69 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 255 0 255 1 1 0 1 0 8 0 amappl8 136 39 0 37 1 0 1 1 0 8 0 amappl7 128 104 0 94 1 0 1 1 0 8 0 amappl6 120 182 0 179 1 0 1 1 0 8 0 amappl5 112 116 0 109 1 0 1 1 0 8 0 amappl4 104 323 0 306 1 0 1 1 0 8 0 amappl3 96 5036 0 4912 4 0 4 4 0 8 0 amappl2 88 667 0 609 2 0 2 2 0 8 0 amappl1 80 11526 0 10972 14 0 14 14 0 8 0 amappl 88 7195 0 7008 5 0 5 5 0 92 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 17 0 2 1 0 1 1 0 8 0 uaddrrnd 24 953 0 923 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 953 0 923 1 0 1 1 0 8 0 vmmpekpl 168 9652 0 9606 3 0 3 3 0 8 0 vmmpepl 168 67026 0 65008 94 1 93 93 0 357 2 vmsppl 360 952 0 923 4 1 3 4 0 8 0 rwobjpl 32 22040 0 18843 27 0 27 27 0 8 0 pdppl 4096 1912 0 1846 108 42 66 82 0 8 0 pvpl 32 420017 0 409147 137 12 125 125 0 265 18 pmappl 216 952 0 923 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 57 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace mld6_fasttimeo() at mld6_fasttimeo+0x133 mld6_checktimer sys/netinet6/mld6.c:383 [inline] mld6_fasttimeo() at mld6_fasttimeo+0x133 sys/netinet6/mld6.c:363 pffasttimo(ffffffff83977ad0) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83977ad0) at timeout_run+0xc0 sys/kern/kern_timeout.c:-1 softclock_thread(ffff80002a72d710) at softclock_thread+0xe3 sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: -4 ddb> machine ddbcpu 1 No such command ddb> trace mld6_fasttimeo() at mld6_fasttimeo+0x133 mld6_checktimer sys/netinet6/mld6.c:383 [inline] mld6_fasttimeo() at mld6_fasttimeo+0x133 sys/netinet6/mld6.c:363 pffasttimo(ffffffff83977ad0) at pffasttimo+0x184 sys/kern/uipc_domain.c:-1 timeout_run(ffffffff83977ad0) at timeout_run+0xc0 sys/kern/kern_timeout.c:-1 softclock_thread(ffff80002a72d710) at softclock_thread+0xe3 sys/kern/kern_timeout.c:810 end trace frame: 0x0, count: -4