uvm_fault(0xffffffff83a91360, 0xffff800029ee6000, 0, 2) -> e kernel: page fault trap, code=2 Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx) TID PID UID PRFLAGS PFLAGS CPU COMMAND *287595 13998 0 0 0 0 syz-executor kcov_remote_enter(0,ffff80002a79e890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838efc30,ffff80002a736d98) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736d98,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7573d402cb90, count: 8 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(0xffffffff83a91360, 0xffff800029ee6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a79e890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838efc30,ffff80002a736d98) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736d98,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7573d402cb90, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff80003c959140 rbx 0xffff80002a79e890 rdx 0xffff8000318b07e0 rcx 0xffff800029ee6000 rax 0xfffffd806cacedb0 r8 0 r9 0 r10 0xe9db872acbe4e262 r11 0x205ba8b11af2e7ec r12 0xffffffff812448c0 endtsleep r13 0xffff80002a736d00 r14 0xffff80002a79e890 r15 0 rip 0xffffffff832f7ee2 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003c959120 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=287595 pid=13998 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000318b1240,0xffff8000318b1cb0 process=0xffff80002a747608 user=0xffff80003c954000, vmspace=0xfffffd8067148468 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 2246 28971 94337 0 2 0 syz-executor 2246 69643 94337 0 3 0x4000080 fsleep syz-executor 64355 125947 45906 0 2 0 syz-executor 64355 216751 45906 0 3 0x4000080 fsleep syz-executor *13998 287595 3673 0 7 0 syz-executor 13998 29063 3673 0 2 0x4000000 syz-executor 13775 15011 57384 0 2 0 syz-executor 13775 493613 57384 0 3 0x4000080 sbwait syz-executor 13775 439121 57384 0 2 0x4000000 syz-executor 50621 470006 78544 0 2 0 syz-executor 50621 497302 78544 0 3 0x4000080 fsleep syz-executor 49380 483191 80473 0 3 0x80 nanoslp syz-executor 49380 355956 80473 0 3 0x4000080 lockf syz-executor 49380 457756 80473 0 3 0x4000080 lockf syz-executor 49380 444652 80473 0 3 0x4000080 fsleep syz-executor 15059 455123 55730 0 2 0 syz-executor 15059 359303 55730 0 3 0x4000080 fsleep syz-executor 3042 220303 66812 0 3 0x80 nanoslp syz-executor 3042 156964 66812 0 3 0x4000080 rest syz-executor 3042 448831 66812 0 3 0x4000080 fsleep syz-executor 57384 260776 66581 0 3 0x82 nanoslp syz-executor 45906 380149 66581 0 3 0x82 nanoslp syz-executor 54160 337020 1 0 3 0x100083 ttyin getty 80473 414733 66581 0 3 0x82 nanoslp syz-executor 3673 126851 66581 0 3 0x82 nanoslp syz-executor 78544 245300 66581 0 3 0x82 nanoslp syz-executor 55730 359934 66581 0 3 0x82 nanoslp syz-executor 66812 140343 66581 0 3 0x82 nanoslp syz-executor 94337 429759 66581 0 3 0x82 nanoslp syz-executor 66581 260689 518 0 3 0x82 kqread syz-executor 518 205725 73298 0 3 0x10008a sigsusp ksh 73298 427208 70719 0 3 0x98 kqread sshd-session 70719 354766 61766 0 3 0x92 kqread sshd-session 61766 345179 1 0 3 0x88 kqread sshd 20235 416835 69409 73 3 0x1100090 kqread syslogd 69409 173119 1 0 3 0x100082 sbwait syslogd 31145 460971 1 0 3 0x100080 kqread resolvd 6176 407372 59401 77 3 0x100092 kqread dhcpleased 32429 521128 59401 77 3 0x100092 kqread dhcpleased 59401 13726 1 0 3 0x80 kqread dhcpleased 47630 328305 0 0 3 0x14200 bored smr 27742 239809 0 0 2 0x14200 zerothread 26777 226901 0 0 3 0x14200 aiodoned aiodoned 50354 341253 0 0 3 0x14200 syncer update 95571 118154 0 0 3 0x14200 cleaner cleaner 75520 301460 0 0 3 0x14200 reaper reaper 41176 419067 0 0 3 0x14200 pgdaemon pagedaemon 18911 352635 0 0 3 0x14200 bored viomb 7687 226754 0 0 3 0x40014200 acpi0 acpi0 487 47815 0 0 3 0x14200 bored softnet0 48748 405736 0 0 3 0x14200 smrbar systqmp 16125 193969 0 0 3 0x14200 bored systq 52527 305352 0 0 3 0x40014200 tmoslp softclock 76242 273786 0 0 3 0x40014200 idle0 1 228674 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11061 12111K 12422K 166960K 13501 0 pcb 17 14K 16K 166960K 341 0 rtable 245 10K 11K 166960K 694 0 pf 32 13K 19K 166960K 121 0 ifaddr 37 6K 7K 166960K 79 0 ifgroup 46 2K 2K 166960K 109 0 sysctl 3 1K 9K 166960K 21 0 counters 32 17K 18K 166960K 58 0 ioctlops 0 0K 4K 166960K 543 0 iov 1 4K 17K 166960K 58 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1413 89K 90K 166960K 2379 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 101 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 1131 0 sigio 0 0K 0K 166960K 14 0 proc 60 59K 124K 166960K 727 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 117 0 in_multi 87 6K 7K 166960K 167 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 32 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 600 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 229 143K 160K 166960K 11391 0 UVM aobj 130 6K 6K 166960K 132 0 pinsyscall 39 78K 96K 166960K 2330 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 48 0 NDP 10 0K 2K 166960K 53 0 temp 70 9102K 9167K 166960K 40209 0 kqueue 14 22K 30K 166960K 197 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 113 0 108 1 0 1 1 0 8 0 rtentry 136 171 0 73 4 0 4 4 0 8 0 unpcb 144 651 0 626 7 3 4 4 0 8 2 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpcb 736 740 0 736 13 6 7 7 0 8 6 arp 96 31 0 15 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 1729 0 1720 20 10 10 12 0 8 8 nd6 112 37 0 16 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 16 0 16 2 1 1 1 0 8 1 pppxif 1416 2 0 2 2 1 1 1 0 8 1 pfstscr 40 6 0 4 1 0 1 1 0 8 0 pffrag 232 8 0 3 1 0 1 1 0 482 0 pffrnode 88 7 0 3 1 0 1 1 0 8 0 pffrent 40 15 0 10 1 0 1 1 0 8 0 pfrktable 1344 17 0 17 1 1 0 1 0 8 0 pfanchor 1288 6 0 6 1 1 0 1 0 8 0 pftag 88 5 0 5 1 1 0 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 5 0 5 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 676 0 219 31 2 29 31 0 8 0 art_table 40 681 0 219 5 0 5 5 0 8 0 art_node 32 171 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 14 1 0 1 1 0 8 0 semapl 64 96 0 86 1 0 1 1 0 8 0 shmpl 112 129 0 2 4 0 4 4 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3399 0 1936 92 0 92 92 0 8 0 ffsino 256 3399 0 1936 92 0 92 92 0 8 0 nchpl 144 4887 0 3181 64 0 64 64 0 8 0 rtmask 32 4 0 4 2 1 1 1 0 8 1 vnodes 216 4082 0 0 227 0 227 227 0 8 0 namei 1024 18000 0 18000 3 2 1 2 0 8 1 pfiaddrpl 120 5 0 5 1 1 0 1 0 8 0 kstatmem 264 59 0 38 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 19274 0 19274 9 7 2 8 1 8 2 plimitpl 152 254 0 237 1 0 1 1 0 8 0 sigapl 424 1439 0 1396 9 1 8 8 0 8 2 knotepl 120 38573 0 38525 32 22 10 24 0 8 7 kqueuepl 184 370 0 360 4 3 1 4 0 8 0 pipepl 304 250 0 223 8 5 3 8 0 8 0 fdescpl 448 1403 0 1373 5 1 4 5 0 8 0 filepl 120 9743 0 9518 16 4 12 13 0 8 3 lockfpl 104 519 0 514 1 0 1 1 0 8 0 lockfspl 48 161 0 158 1 0 1 1 0 8 0 sessionpl 144 83 0 75 1 0 1 1 0 8 0 pgrppl 48 106 0 90 1 0 1 1 0 8 0 ucredpl 104 1589 0 1578 1 0 1 1 0 8 0 zombiepl 144 1396 0 1396 2 1 1 1 0 8 1 processpl 1152 1439 0 1396 5 0 5 5 0 8 1 procpl 664 2801 0 2746 7 0 7 7 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 2630 0 2591 19 8 11 12 0 8 7 mcl64k 65536 146 0 146 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k128 9344 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 14 0 14 2 1 1 1 0 8 1 mcl4k 4096 3892 0 3839 15 5 10 14 0 8 2 mcl2k 2048 1008 0 996 2 0 2 2 0 8 0 mtagpl 96 9 0 7 1 0 1 1 0 8 0 mbufpl 256 15373 0 15175 49 25 24 38 0 8 8 bufpl 280 6225 0 103 438 0 438 438 0 8 0 anonpl 24 222710 0 219388 66 15 51 51 0 186 19 amapchunkpl 152 39083 0 38578 51 17 34 36 0 158 13 amappl16 200 4031 0 3997 31 20 11 15 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 458 0 457 1 0 1 1 0 8 0 amappl13 176 124 0 114 1 0 1 1 0 8 0 amappl12 168 1654 0 1625 2 0 2 2 0 8 0 amappl11 160 17 0 17 1 1 0 1 0 8 0 amappl10 152 64 0 54 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 115 0 113 1 0 1 1 0 8 0 amappl7 128 155 0 143 1 0 1 1 0 8 0 amappl6 120 192 0 190 1 0 1 1 0 8 0 amappl5 112 95 0 86 1 0 1 1 0 8 0 amappl4 104 279 0 264 1 0 1 1 0 8 0 amappl3 96 7705 0 7586 4 0 4 4 0 8 0 amappl2 88 557 0 502 2 0 2 2 0 8 0 amappl1 80 13772 0 13223 16 1 15 15 0 8 2 amappl 88 10459 0 10292 5 0 5 5 0 92 0 uvmvnodes 80 129 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 20 0 19 1 0 1 1 0 8 0 aobjpl 72 131 0 2 3 0 3 3 0 8 0 uaddrrnd 24 1403 0 1373 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1403 0 1373 1 0 1 1 0 8 0 vmmpekpl 168 12065 0 12018 3 0 3 3 0 8 0 vmmpepl 168 92875 0 91013 99 6 93 93 0 357 9 vmsppl 368 1402 0 1373 4 1 3 4 0 8 0 rwobjpl 40 25988 0 24863 14 0 14 14 0 8 0 pdppl 4096 2812 0 2746 116 46 70 82 0 8 4 pvpl 32 622314 0 613133 155 26 129 129 0 265 34 pmappl 216 1402 0 1373 3 1 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 443 0 95 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002a79e890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838efc30,ffff80002a736d98) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736d98,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7573d402cb90, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff80002a79e890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838efc30,ffff80002a736d98) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736d98,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7573d402cb90, count: -7