uvm_fault(0xffffffff83a5fc40, 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 *134722 26204 0 0 0 0 syz-executor kcov_remote_enter(0,ffff800045ff9f98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83993e70,ffff80002a736338) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736338,0) 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: 0x7c91d17ffae0, 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(0xffffffff83a5fc40, 0xffff800029ee6000, 0, 2) -> e ddb> show kasan No such command ddb> trace kcov_remote_enter(0,ffff800045ff9f98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83993e70,ffff80002a736338) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736338,0) 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: 0x7c91d17ffae0, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c17f00 rbp 0xffff80002a89f330 rbx 0xffff800045ff9f98 rdx 0xffff80002a7a02b0 rcx 0xffff800029ee6000 rax 0xfffff9806d1b3db0 r8 0 r9 0 r10 0x51f32be6292720ae r11 0xeb5857d8faed67e1 r12 0xffffffff81327ab0 endtsleep r13 0xffff80002a7362a0 r14 0xffff800045ff9f98 r15 0 rip 0xffffffff817fe332 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a89f310 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=134722 pid=26204 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=0xffff80003c8fa550,0xffff80002a7a1cb0 process=0xffff800045ffa418 user=0xffff80002a89a000, vmspace=0xfffff9806d1a7b90 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *26204 134722 15284 0 7 0 syz-executor 26204 458508 15284 0 2 0x4000000 syz-executor 49065 170184 45293 0 2 0x2 ifconfig 34641 425728 55231 0 2 0 syz-executor 45293 368254 75169 0 3 0x10008a sigsusp sh 35254 28011 23587 0 2 0 syz-executor 35254 165173 23587 0 3 0x4000080 nanoslp syz-executor 35254 119649 23587 0 3 0x4000080 fsleep syz-executor 183 21897 55528 0 2 0 syz-executor 183 49350 55528 0 3 0x4000080 ttyin syz-executor 18305 69294 84055 0 2 0 syz-executor 18305 136771 84055 0 3 0x4000080 fsleep syz-executor 75169 319271 6700 0 3 0x82 wait syz-executor 55528 411282 6700 0 3 0x82 nanoslp syz-executor 33153 384598 0 0 3 0x14200 acct acct 18482 509606 1 0 3 0x100083 ttyin getty 43407 330149 6700 0 3 0x82 wait syz-executor 1693 16398 6700 0 2 0x2 syz-executor 55231 146810 6700 0 3 0x82 nanoslp syz-executor 23587 4705 6700 0 3 0x82 nanoslp syz-executor 84055 481344 6700 0 3 0x82 nanoslp syz-executor 15284 174188 6700 0 3 0x82 nanoslp syz-executor 6700 80143 26665 0 3 0x82 kqread syz-executor 26665 190984 54587 0 3 0x10008a sigsusp ksh 54587 435531 40133 0 3 0x98 kqread sshd-session 40133 22684 48135 0 3 0x92 kqread sshd-session 48135 504934 1 0 3 0x88 kqread sshd 48489 424448 13189 73 3 0x1100090 kqread syslogd 13189 427953 1 0 3 0x100082 sbwait syslogd 54022 322035 1 0 3 0x100080 kqread resolvd 47063 183711 21171 77 3 0x100092 kqread dhcpleased 8626 394129 21171 77 3 0x100092 kqread dhcpleased 21171 253566 1 0 3 0x80 kqread dhcpleased 24705 474452 0 0 3 0x14200 bored smr 26585 513491 0 0 2 0x14200 zerothread 37766 416849 0 0 3 0x14200 aiodoned aiodoned 59328 216375 0 0 3 0x14200 syncer update 97546 212753 0 0 3 0x14200 cleaner cleaner 7510 398833 0 0 3 0x14200 reaper reaper 78995 172291 0 0 3 0x14200 pgdaemon pagedaemon 22686 363377 0 0 3 0x14200 bored viomb 19413 126590 0 0 3 0x40014200 acpi0 acpi0 65595 339383 0 0 3 0x14200 bored softnet0 64426 412193 0 0 3 0x14200 bored systqmp 48074 79214 0 0 3 0x14200 bored systq 10202 308401 0 0 3 0x40014200 tmoslp softclock 8597 157844 0 0 3 0x40014200 idle0 1 22796 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 11066 12195K 12646K 166960K 13733 0 pcb 17 16K 17K 166960K 270 0 rtable 219 9K 10K 166960K 1053 0 pf 31 13K 93K 166960K 182 0 ifaddr 36 6K 8K 166960K 157 0 ifgroup 43 1K 2K 166960K 213 0 sysctl 2 1K 9K 166960K 12 0 counters 32 17K 18K 166960K 153 0 ioctlops 0 0K 4K 166960K 575 0 iov 0 0K 16K 166960K 38 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1416 89K 90K 166960K 2489 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 25 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 33 0 dirhash 12 2K 3K 166960K 27 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 1478 0 sigio 0 0K 0K 166960K 8 0 proc 67 67K 91K 166960K 1191 0 subproc 72 4K 4K 166960K 243 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 338 0 in_multi 77 5K 7K 166960K 329 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 22 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 800 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 215 151K 168K 166960K 13447 0 UVM aobj 23 4K 4K 166960K 23 0 pinsyscall 39 78K 93K 166960K 3058 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 43 0 NDP 10 0K 2K 166960K 112 0 temp 55 9110K 9174K 166960K 45218 0 kqueue 13 20K 28K 166960K 213 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 0 138 1 0 1 1 0 8 0 rtentry 136 340 0 253 4 0 4 4 0 8 0 unpcb 144 1097 0 1082 6 5 1 6 0 8 0 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 360 0 287 10 3 7 7 0 8 0 arp 96 58 0 42 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 2 0 2 1 0 1 1 0 8 1 inpcb 328 1377 0 1298 14 7 7 9 0 8 0 ip6q 72 5 0 3 1 0 1 1 0 8 0 ip6af 40 8 0 6 1 0 1 1 0 8 0 nd6 112 84 0 64 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 27 0 19 1 0 1 1 0 8 0 ppxss 1072 91 0 91 1 1 0 1 0 8 0 pppxif 1416 66 0 66 1 1 0 1 0 8 0 pfstscr 40 12 0 4 1 0 1 1 0 8 0 pffrag 232 9 0 0 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 11 0 2 1 0 1 1 0 8 0 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfsrclim 320 2 0 1 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 11 0 0 1 0 1 1 0 8 0 pfstkey 128 17 0 6 1 0 1 1 0 8 0 pfstate 384 9 0 3 1 0 1 1 0 8 0 pfrule 1360 9 0 9 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1418 0 1054 32 3 29 32 0 8 2 art_table 40 1420 0 1054 6 1 5 6 0 8 0 art_node 32 338 0 263 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 30 0 20 1 0 1 1 0 8 0 shmpl 112 20 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3558 0 2072 94 0 94 94 0 8 0 ffsino 256 3558 0 2072 94 0 94 94 0 8 0 nchpl 144 5216 0 3463 66 0 66 66 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 vnodes 216 4361 0 0 243 0 243 243 0 8 0 namei 1024 19347 0 19347 3 2 1 2 0 8 1 kstatmem 264 119 0 98 2 0 2 2 0 8 0 scsiplug 72 8 0 8 1 1 0 1 0 8 0 scxspl 216 19803 0 19803 9 7 2 8 1 8 2 plimitpl 152 362 0 345 1 0 1 1 0 8 0 sigapl 424 1737 0 1693 7 1 6 6 0 8 0 knotepl 120 42040 0 41993 18 8 10 10 0 8 8 kqueuepl 184 370 0 361 6 3 3 4 0 8 2 pipepl 304 300 0 273 8 5 3 8 0 8 0 fdescpl 448 1723 0 1693 5 1 4 5 0 8 0 filepl 120 9773 0 9497 17 6 11 15 0 8 2 lockfpl 104 387 0 385 1 0 1 1 0 8 0 lockfspl 48 176 0 174 1 0 1 1 0 8 0 sessionpl 144 102 0 94 1 0 1 1 0 8 0 pgrppl 48 134 0 118 1 0 1 1 0 8 0 ucredpl 104 1747 0 1736 1 0 1 1 0 8 0 zombiepl 144 1694 0 1693 2 1 1 1 0 8 0 processpl 1152 1737 0 1693 4 0 4 4 0 8 0 procpl 664 3302 0 3253 6 1 5 6 0 8 0 sockpl 552 2657 0 2560 17 9 8 12 0 8 1 mcl64k 65536 104 0 101 1 0 1 1 0 8 0 mcl16k 16384 21 0 21 2 1 1 1 0 8 1 mcl12k 12288 9 0 9 2 1 1 1 0 8 1 mcl9k128 9344 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 34 0 33 1 0 1 1 0 8 0 mcl4k 4096 4213 0 4162 13 5 8 13 0 8 1 mcl2k2 2112 5 0 5 1 1 0 1 0 8 0 mcl2k 2048 1236 0 1232 9 1 8 8 0 8 7 mextrefs 64 722 0 722 2 1 1 1 0 8 1 mtagpl 96 7 0 5 1 0 1 1 0 8 0 mbufpl 256 17214 0 17083 20 5 15 17 0 8 3 bufpl 272 6337 0 121 415 0 415 415 0 8 0 anonpl 24 215439 0 212218 59 27 32 57 0 187 1 amapchunkpl 152 45380 0 44933 43 20 23 39 0 158 5 amappl16 200 3038 0 3010 17 12 5 15 0 8 2 amappl15 192 12 0 12 1 1 0 1 0 8 0 amappl14 184 639 0 637 1 0 1 1 0 8 0 amappl13 176 176 0 166 1 0 1 1 0 8 0 amappl12 168 2034 0 2006 2 0 2 2 0 8 0 amappl11 160 19 0 19 1 1 0 1 0 8 0 amappl10 152 67 0 57 1 0 1 1 0 8 0 amappl9 144 269 0 268 1 0 1 1 0 8 0 amappl8 136 171 0 168 1 0 1 1 0 8 0 amappl7 128 197 0 186 1 0 1 1 0 8 0 amappl6 120 355 0 352 1 0 1 1 0 8 0 amappl5 112 108 0 99 1 0 1 1 0 8 0 amappl4 104 320 0 304 1 0 1 1 0 8 0 amappl3 96 9208 0 9103 4 0 4 4 0 8 0 amappl2 88 681 0 624 2 0 2 2 0 8 0 amappl1 80 17092 0 16533 13 1 12 13 0 8 0 amappl 88 12316 0 12163 5 0 5 5 0 92 0 uvmvnodes 80 125 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 9 0 9 1 1 0 1 0 8 0 dma128 128 254 0 254 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 51 0 50 1 0 1 1 0 8 0 aobjpl 72 22 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1723 0 1693 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1723 0 1693 1 0 1 1 0 8 0 vmmpekpl 168 14257 0 14221 3 0 3 3 0 8 0 vmmpepl 168 112572 0 110807 92 10 82 91 0 357 3 vmsppl 368 1722 0 1693 4 1 3 4 0 8 0 rwobjpl 40 29711 0 28709 13 2 11 13 0 8 0 pdppl 4096 3452 0 3386 122 54 68 78 0 8 2 pvpl 32 684055 0 675115 132 41 91 132 0 265 0 pmappl 216 1722 0 1693 2 0 2 2 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 835 0 80 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff800045ff9f98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83993e70,ffff80002a736338) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736338,0) 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: 0x7c91d17ffae0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff800045ff9f98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83993e70,ffff80002a736338) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a736338,0) 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: 0x7c91d17ffae0, count: -7