uvm_fault(0xffffffff82d44868, 0xffff80002a186000, 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 *210125 59625 0 0 0 0 syz-executor.5 kcov_remote_enter(0,ffff8000ffff8c98) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a604e18) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a604e18,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d935ff27130, count: 9 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(0xffffffff82d44868, 0xffff80002a186000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff8000ffff8c98) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a604e18) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a604e18,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d935ff27130, count: -6 ddb> show registers rdi 0xffffffff rsi 0xffff8000006a8a00 rbp 0xffff800035dd31c0 rbx 0x7ffee249 rdx 0xffff80002a699ab0 rcx 0xffff80002a186000 rax 0xfffffd8067462f00 r8 0 r9 0 r10 0x8282837393eeebee r11 0xcd6060dcf30139a1 r12 0xffff80002a604d58 r13 0xffffffff82ca5ff0 cpu_info_full_primary+0x1ff0 r14 0xffff8000ffff8c98 r15 0 rip 0xffffffff815d1242 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff800035dd31a0 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor.5) tid=210125 pid=59625 tcnt=2 stat=onproc flags process=0 proc=0 runpri=67, usrpri=67, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a6d1298,0xffff80002a6982d8 process=0xffff800035e0b688 user=0xffff800035dce000, vmspace=0xfffffd807e2992e0 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70960 166129 30398 0 2 0 syz-executor.2 *59625 210125 10138 0 7 0 syz-executor.5 59625 390303 10138 0 2 0x4000000 syz-executor.5 89232 437032 83113 0 2 0 syz-executor.4 89232 271303 83113 0 2 0x4000000 syz-executor.4 61620 395061 55068 0 2 0 syz-executor.6 61620 67425 55068 0 3 0x4000080 fsleep syz-executor.6 84805 378181 82571 0 2 0 syz-executor.7 84805 377493 82571 0 2 0x4000000 syz-executor.7 91214 235156 30346 0 2 0 syz-executor.1 91214 478733 30346 0 3 0x4000080 fsleep syz-executor.1 14917 385166 79153 0 2 0 syz-executor.0 14917 218070 79153 0 3 0x4000080 kqread syz-executor.0 30398 158235 63609 0 2 0x2 syz-executor.2 55068 520268 63609 0 3 0x82 nanoslp syz-executor.6 69481 219635 63609 0 2 0x2 syz-executor.3 83113 90092 63609 0 3 0x82 nanoslp syz-executor.4 81123 411909 0 0 3 0x14200 bored sosplice 82571 67066 63609 0 2 0x482 syz-executor.7 10138 14726 63609 0 3 0x82 nanoslp syz-executor.5 79153 85336 63609 0 3 0x82 nanoslp syz-executor.0 30346 316058 63609 0 3 0x82 nanoslp syz-executor.1 63609 164506 19374 0 3 0x1a000082 wait syz-fuzzer 63609 379878 19374 0 3 0x1e000082 nanoslp syz-fuzzer 63609 454701 19374 0 3 0x1e000082 thrsleep syz-fuzzer 63609 43369 19374 0 3 0x1e000082 wait syz-fuzzer 63609 192666 19374 0 3 0x1e000082 wait syz-fuzzer 63609 117732 19374 0 3 0x1e000082 wait syz-fuzzer 63609 477447 19374 0 3 0x1e000082 wait syz-fuzzer 63609 335426 19374 0 3 0x1e000082 thrsleep syz-fuzzer 63609 224706 19374 0 3 0x1e000082 wait syz-fuzzer 63609 134993 19374 0 3 0x1e000082 thrsleep syz-fuzzer 63609 393708 19374 0 3 0x1e000082 wait syz-fuzzer 63609 239799 19374 0 3 0x1e000082 kqread syz-fuzzer 63609 245939 19374 0 3 0x1e000082 wait syz-fuzzer 63609 75077 19374 0 3 0x1e000082 thrsleep syz-fuzzer 19374 504889 31567 0 3 0x810008a sigsusp ksh 31567 456384 60680 0 3 0x1800009a kqread sshd 68066 275431 1 0 3 0x18100083 ttyin getty 60680 461749 1 0 3 0x18000088 kqread sshd 95504 179788 29667 73 3 0x19100090 kqread syslogd 29667 195001 1 0 3 0x18100082 netio syslogd 2168 45209 1 0 3 0x18100080 kqread resolvd 40220 512261 85398 77 3 0x18100092 kqread dhcpleased 41120 396288 85398 77 3 0x18100092 kqread dhcpleased 85398 501761 1 0 3 0x18000080 kqread dhcpleased 21741 362558 0 0 3 0x14200 bored smr 34755 340255 0 0 2 0x14200 zerothread 2874 510190 0 0 3 0x14200 aiodoned aiodoned 89910 304180 0 0 3 0x14200 syncer update 95403 116053 0 0 3 0x14200 cleaner cleaner 75404 265948 0 0 3 0x14200 reaper reaper 27294 58987 0 0 3 0x14200 pgdaemon pagedaemon 54213 300043 0 0 3 0x14200 bored viomb 71731 74239 0 0 3 0x40014200 acpi0 acpi0 86185 65376 0 0 3 0x14200 bored softnet3 94654 317418 0 0 3 0x14200 bored softnet2 14039 67736 0 0 3 0x14200 bored softnet1 32397 230364 0 0 3 0x14200 bored softnet0 96369 151788 0 0 3 0x14200 bored systqmp 36681 508795 0 0 3 0x14200 bored systq 48670 321756 0 0 3 0x40014200 tmoslp softclock 99495 314421 0 0 3 0x40014200 idle0 1 157772 0 0 3 0x8000082 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 10218 6550K 6929K 166960K 16833 0 pcb 15 12K 13K 166960K 118 0 rtable 210 6K 6K 166960K 1009 0 pf 29 8K 9K 166960K 94 0 ifaddr 40 11K 11K 166960K 110 0 ifgroup 50 2K 2K 166960K 149 0 counters 30 17K 17K 166960K 61 0 ioctlops 0 0K 2K 166960K 113 0 iov 0 0K 20K 166960K 387 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1661 104K 105K 166960K 3406 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 32 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 535 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 73K 166960K 2772 0 sigio 0 0K 0K 166960K 51 0 proc 58 59K 75K 166960K 774 0 subproc 104 6K 6K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 104 0 in_multi 88 6K 7K 166960K 232 0 ether_multi 1 0K 0K 166960K 1 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 699 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 354 214K 214K 166960K 27290 0 UVM aobj 131 4K 4K 166960K 131 0 pinsyscall 22 44K 100K 166960K 1448 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 88 0 NDP 11 0K 1K 166960K 77 0 temp 75 6806K 6888K 166960K 16335 0 kqueue 14 22K 28K 166960K 244 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 96 0 93 1 0 1 1 0 8 0 rtentry 112 330 0 232 4 1 3 4 0 8 0 unpcb 144 1674 0 1661 6 0 6 6 0 8 5 syncache 336 19 0 19 2 1 1 1 0 8 1 tcpqe 32 645 0 645 2 1 1 1 0 8 1 tcpcb 808 865 0 860 14 6 8 8 0 8 7 arp 88 48 0 32 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 6 0 6 1 0 1 1 0 8 1 inpcb 360 2021 0 2010 14 5 9 9 0 8 7 nd6 104 51 0 30 1 0 1 1 0 8 0 pkpcb 40 21 0 21 1 0 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1072 14 0 14 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1002 0 585 31 4 27 29 0 8 0 art_table 32 1003 0 585 4 0 4 4 0 8 0 art_node 16 262 0 173 1 0 1 1 0 8 0 sysvmsgpl 40 52 0 12 1 0 1 1 0 8 0 semapl 112 532 0 522 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 5591 0 4070 96 0 96 96 0 8 0 ffsino 240 5591 0 4070 90 0 90 90 0 8 0 nchpl 144 9799 0 8073 66 0 66 66 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 32639 0 32639 4 2 2 2 0 8 2 vcpupl 2048 21 0 0 3 0 3 3 0 8 0 vmpool 664 30 0 9 2 0 2 2 0 8 0 kstatmem 264 84 0 62 2 0 2 2 0 8 0 scxspl 216 30037 0 30037 11 7 4 8 1 8 4 plimitpl 152 206 0 191 1 0 1 1 0 8 0 sigapl 424 3052 0 3007 6 0 6 6 0 8 0 futexpl 64 25686 0 25684 1 0 1 1 0 8 0 knotepl 120 29326 0 29029 16 4 12 16 0 8 3 kqueuepl 184 525 0 515 4 0 4 4 0 8 3 pipepl 288 648 0 619 10 0 10 10 0 8 7 fdescpl 432 3034 0 3006 4 0 4 4 0 8 0 filepl 120 19017 0 18773 19 4 15 15 0 8 5 lockfpl 104 847 0 844 2 0 2 2 0 8 1 lockfspl 48 232 0 229 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 115 0 99 1 0 1 1 0 8 0 ucredpl 104 3113 0 3102 1 0 1 1 0 8 0 zombiepl 144 3007 0 3007 1 0 1 1 0 8 1 processpl 1072 3052 0 3007 4 0 4 4 0 8 0 procpl 680 6861 0 6797 8 1 7 7 0 8 1 sosppl 168 37 0 37 1 0 1 1 0 8 1 sockpl 488 3815 0 3791 53 41 12 22 0 8 9 mcl64k 65536 144 0 144 2 1 1 1 0 8 1 mcl16k 16384 63 0 63 2 1 1 1 0 8 1 mcl12k 12288 108 0 108 2 1 1 1 0 8 1 mcl9k 9216 63 0 63 2 1 1 1 0 8 1 mcl8k 8192 273 0 273 2 1 1 1 0 8 1 mcl4k 4096 295 0 295 2 1 1 1 0 8 1 mcl2k2 2112 13 0 13 2 1 1 1 0 8 1 mcl2k 2048 74870 0 74702 61 31 30 33 0 8 8 mtagpl 96 757 0 324 16 0 16 16 0 8 4 mbufpl 256 141589 0 140971 102 48 54 95 0 8 7 bufpl 280 10081 0 3745 453 0 453 453 0 8 0 anonpl 24 422187 0 408524 115 4 111 111 0 188 22 amapchunkpl 152 97478 0 96627 49 1 48 48 0 158 12 amappl16 200 10225 0 9792 39 8 31 36 0 8 7 amappl15 192 39 0 38 1 0 1 1 0 8 0 amappl14 184 172 0 162 2 1 1 2 0 8 0 amappl13 176 12 0 12 1 1 0 1 0 8 0 amappl12 168 3770 0 3742 2 0 2 2 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 48 0 40 1 0 1 1 0 8 0 amappl9 144 194 0 193 1 0 1 1 0 8 0 amappl8 136 191 0 139 2 0 2 2 0 8 0 amappl7 128 66 0 52 1 0 1 1 0 8 0 amappl6 120 447 0 428 2 1 1 2 0 8 0 amappl5 112 260 0 247 1 0 1 1 0 8 0 amappl4 104 601 0 567 2 1 1 2 0 8 0 amappl3 96 17623 0 17542 3 0 3 3 0 8 0 amappl2 88 3600 0 3528 4 1 3 4 0 8 0 amappl1 80 19317 0 18836 21 10 11 21 0 8 0 amappl 88 26595 0 26373 6 0 6 6 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 3064 0 3015 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3064 0 3015 1 0 1 1 0 8 0 vmmpekpl 168 24385 0 24320 4 0 4 4 0 8 0 vmmpepl 168 200059 0 197828 152 26 126 126 0 357 23 vmsppl 352 3063 0 3015 5 0 5 5 0 8 0 rwobjpl 24 59175 0 51708 46 0 46 46 0 8 0 pdppl 4096 6134 0 6051 233 148 85 87 0 8 2 pvpl 32 1057541 0 1038383 398 203 195 362 0 265 33 pmappl 216 3063 0 3015 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 669 0 247 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff8000ffff8c98) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a604e18) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a604e18,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d935ff27130, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff8000ffff8c98) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a604e18) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a604e18,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d935ff27130, count: -6