uvm_fault(0xffffffff838b92d0, 0xffff800029f26000, 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 kcov_remote_enter(0,ffff80002f0f1218) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff837d2fc0,ffff80002a7b0348) at timeout_run+0xc2 sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7b0348,0) 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 pool_put(ffffffff83883c90,fffffd806d7fa148) at pool_put+0x27a sys/kern/subr_pool.c:814 uvm_unmap_detach(ffff80002a8cfc10,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806cb30b90) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a788fb8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a788fb8,ffff80002a8cfdd0,ffff80002a8cfd20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a8cfdd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8cfdd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d622ff8080, count: 1 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(0xffffffff838b92d0, 0xffff800029f26000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002f0f1218) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff837d2fc0,ffff80002a7b0348) at timeout_run+0xc2 sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7b0348,0) 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 pool_put(ffffffff83883c90,fffffd806d7fa148) at pool_put+0x27a sys/kern/subr_pool.c:814 uvm_unmap_detach(ffff80002a8cfc10,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806cb30b90) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a788fb8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a788fb8,ffff80002a8cfdd0,ffff80002a8cfd20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a8cfdd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8cfdd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d622ff8080, count: -14 ddb> show registers rdi 0xffffffff rsi 0xffff800000b11c00 rbp 0xffff80002a8cf960 rbx 0xffff80002f0f1218 rdx 0xffff80002a788fb8 rcx 0xffff800029f26000 rax 0xfffffd806cb3aea0 r8 0 r9 0xffff80002a8cfaf0 r10 0x982b1db202c6460f r11 0xf65dd199e7d5e189 r12 0xffffffff8249a7a0 endtsleep r13 0xffff80002a7b02b0 r14 0xffff80002f0f1218 r15 0 rip 0xffffffff82bbab62 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a8cf940 ss 0x10 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=271958 pid=46475 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=16, usrpri=85, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a788fb8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a788558,0xffff80002a7b14e8 process=0xffff80002f0f2418 user=0xffff80002a8ca000, vmspace=0xfffffd806cb30b90 estcpu=35, cpticks=8, pctcpu=0.0, user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 890 486855 34920 0 2 0 syz-executor 890 78386 34920 0 3 0x4000080 fsleep syz-executor 53238 269873 74818 0 2 0x82000 syz-executor 53238 406971 74818 0 3 0x4002000 suspend syz-executor 53238 406205 74818 0 4 0x4082000 syz-executor 16660 353412 81633 0 2 0 syz-executor 16660 507900 81633 0 2 0x4000000 syz-executor 16660 299331 81633 0 3 0x4000080 fsleep syz-executor 20588 248916 38501 0 3 0x80 nanoslp syz-executor 20588 67123 38501 0 3 0x4000080 pipewr syz-executor 20588 178670 38501 0 3 0x4000080 fsleep syz-executor 20588 153996 38501 0 3 0x4000080 fsleep syz-executor 81633 267663 80214 0 3 0x82 nanoslp syz-executor 34920 190058 80214 0 3 0x82 nanoslp syz-executor 84026 289122 0 0 3 0x14200 acct acct 38501 119211 80214 0 3 0x82 nanoslp syz-executor 87166 2803 80214 0 3 0x82 nanoslp syz-executor 74818 260844 80214 0 3 0x82 nanoslp syz-executor 79792 135587 80214 0 3 0x82 piperd syz-executor 80214 39810 55546 0 3 0x82 wait syz-executor 55546 419353 71709 0 3 0x10008a sigsusp ksh 71709 134270 23500 0 3 0x98 kqread sshd-session 23500 504126 9992 0 3 0x92 kqread sshd-session 57326 392986 1 0 3 0x100083 ttyopn getty 9992 21104 1 0 3 0x88 kqread sshd 23160 124135 12167 73 3 0x1100090 kqread syslogd 12167 138611 1 0 3 0x100082 sbwait syslogd 87018 448477 1 0 3 0x100080 kqread resolvd 60460 403948 27881 77 3 0x100092 kqread dhcpleased 90912 344138 27881 77 3 0x100092 kqread dhcpleased 27881 25936 1 0 3 0x80 kqread dhcpleased 67845 82302 0 0 3 0x14200 bored smr 97385 68443 0 0 2 0x14200 zerothread 27506 434995 0 0 3 0x14200 aiodoned aiodoned 33978 258805 0 0 3 0x14200 syncer update 32737 335737 0 0 3 0x14200 cleaner cleaner 10891 152937 0 0 3 0x14200 reaper reaper 26375 143085 0 0 3 0x14200 pgdaemon pagedaemon 50935 169319 0 0 3 0x14200 bored viomb 9590 317996 0 0 3 0x40014200 acpi0 acpi0 15893 2786 0 0 3 0x14200 bored softnet0 9336 232195 0 0 3 0x14200 bored systqmp 88285 57834 0 0 3 0x14200 bored systq 17127 223787 0 0 3 0x40014200 tmoslp softclock 69748 167281 0 0 3 0x40014200 idle0 1 42485 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 10221 11379K 11593K 166960K 13428 0 pcb 18 14K 16K 166960K 297 0 rtable 233 10K 11K 166960K 1040 0 pf 32 13K 17K 166960K 154 0 ifaddr 40 7K 7K 166960K 158 0 ifgroup 50 2K 2K 166960K 205 0 sysctl 4 1K 9K 166960K 14 0 counters 33 17K 18K 166960K 99 0 ioctlops 0 0K 4K 166960K 403 0 iov 0 0K 28K 166960K 65 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 86K 87K 166960K 2612 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 112 0 dirhash 111 19K 20K 166960K 774 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 85K 166960K 1500 0 sigio 0 0K 0K 166960K 55 0 proc 61 67K 91K 166960K 1099 0 subproc 72 4K 4K 166960K 234 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 114 0 in_multi 96 6K 7K 166960K 336 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 693 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 223 159K 177K 166960K 14618 0 UVM aobj 107 144K 144K 166960K 108 0 pinsyscall 35 70K 89K 166960K 3056 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 55 0 NDP 13 0K 2K 166960K 110 0 temp 63 8668K 8745K 166960K 59621 0 kqueue 16 24K 30K 166960K 236 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 120 209 0 206 3 0 3 3 0 8 2 rtentry 136 343 0 248 4 0 4 4 0 8 0 unpcb 144 1001 0 983 9 5 4 6 0 8 3 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 5 0 5 2 1 1 1 0 8 1 tcpcb 736 353 0 346 3 1 2 2 0 8 1 arp 96 60 0 42 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 1069 0 1056 7 0 7 7 0 8 5 ip6q 72 5 0 4 2 1 1 1 0 8 0 ip6af 40 9 0 8 2 1 1 1 0 8 0 nd6 112 87 0 63 1 0 1 1 0 8 0 pkpcb 40 14 0 14 2 1 1 1 0 8 1 kcovpl 48 26 0 18 1 0 1 1 0 8 0 ppxss 1072 40 0 40 2 1 1 1 0 8 1 pppxif 1384 4 0 4 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 1 1 0 1 1 0 8 1 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 1 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1344 2 0 2 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1461 0 1024 36 8 28 31 0 8 0 art_table 40 1464 0 1024 5 0 5 5 0 8 0 art_node 32 343 0 260 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 108 0 98 1 0 1 1 0 8 0 shmpl 112 34 0 1 1 0 1 1 0 8 0 dirhash 1024 275 0 225 7 0 7 7 0 8 0 dino2pl 256 3778 0 2246 96 0 96 96 0 8 0 ffsino 256 3779 0 2247 96 0 96 96 0 8 0 nchpl 144 5575 0 3833 65 0 65 65 0 8 0 rtmask 32 13 0 13 2 1 1 1 0 8 1 vnodes 216 4568 0 0 254 0 254 254 0 8 0 namei 1024 20505 0 20505 2 1 1 2 0 8 1 vcpupl 3904 71 0 0 9 0 9 9 0 8 0 vmpool 800 71 0 0 8 0 8 8 0 8 0 kstatmem 264 114 0 92 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 18396 0 18396 11 7 4 8 1 8 4 plimitpl 152 497 0 480 1 0 1 1 0 8 0 sigapl 424 1760 0 1719 6 0 6 6 0 8 0 knotepl 120 63469 0 63418 30 20 10 16 0 8 8 kqueuepl 184 513 0 501 4 3 1 4 0 8 0 pipepl 304 312 0 283 7 2 5 5 0 8 2 fdescpl 448 1742 0 1716 4 0 4 4 0 8 0 filepl 120 10656 0 10365 13 2 11 11 0 8 2 lockfpl 104 595 0 593 2 0 2 2 0 8 1 lockfspl 48 192 0 190 1 0 1 1 0 8 0 sessionpl 144 41 0 33 1 0 1 1 0 8 0 pgrppl 48 79 0 63 1 0 1 1 0 8 0 ucredpl 104 1829 0 1817 1 0 1 1 0 8 0 zombiepl 144 2165 0 2162 1 0 1 1 0 8 0 processpl 1152 1760 0 1719 4 0 4 4 0 8 0 procpl 664 3590 0 3541 6 0 6 6 0 8 0 sosppl 176 5 0 5 2 1 1 1 0 8 1 sockpl 552 2323 0 2288 16 8 8 12 0 8 5 mcl64k 65536 64 0 64 2 1 1 1 0 8 1 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 14 0 13 1 0 1 1 0 8 0 mcl4k 4096 3975 0 3922 17 8 9 16 0 8 0 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 2385 0 2378 4 1 3 3 0 8 2 mtagpl 96 106 0 22 3 0 3 3 0 8 0 mbufpl 256 20362 0 20106 45 18 27 41 0 8 6 bufpl 280 6728 0 507 445 0 445 445 0 8 0 anonpl 24 238972 0 235464 64 19 45 45 0 187 16 amapchunkpl 152 48167 0 47706 44 7 37 37 0 158 16 amappl16 200 3566 0 3536 36 25 11 15 0 8 8 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 2 0 2 1 1 0 1 0 8 0 amappl13 176 629 0 627 1 0 1 1 0 8 0 amappl12 168 2207 0 2171 2 0 2 2 0 8 0 amappl11 160 7 0 7 2 1 1 1 0 8 1 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 264 0 264 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 198 0 196 1 0 1 1 0 8 0 amappl6 120 479 0 467 1 0 1 1 0 8 0 amappl5 112 107 0 99 1 0 1 1 0 8 0 amappl4 104 473 0 450 1 0 1 1 0 8 0 amappl3 96 9412 0 9318 4 0 4 4 0 8 1 amappl2 88 671 0 617 2 0 2 2 0 8 0 amappl1 80 16283 0 15761 13 1 12 13 0 8 0 amappl 88 13407 0 13254 6 1 5 5 0 92 0 uvmvnodes 80 134 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 128 255 0 255 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 107 0 1 2 0 2 2 0 8 0 uaddrrnd 24 1742 0 1716 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1742 0 1716 1 0 1 1 0 8 0 vmmpekpl 168 14840 0 14784 3 0 3 3 0 8 0 vmmpepl 168 114737 0 113059 101 9 92 92 0 357 11 vmsppl 368 1741 0 1715 4 1 3 4 0 8 0 rwobjpl 40 30627 0 29558 14 0 14 14 0 8 0 pdppl 4096 3632 0 3501 185 46 139 140 0 8 8 pvpl 32 724840 0 716499 160 38 122 122 0 265 32 pmappl 216 1812 0 1715 6 0 6 6 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 512 0 89 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002f0f1218) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff837d2fc0,ffff80002a7b0348) at timeout_run+0xc2 sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7b0348,0) 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 pool_put(ffffffff83883c90,fffffd806d7fa148) at pool_put+0x27a sys/kern/subr_pool.c:814 uvm_unmap_detach(ffff80002a8cfc10,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806cb30b90) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a788fb8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a788fb8,ffff80002a8cfdd0,ffff80002a8cfd20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a8cfdd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8cfdd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d622ff8080, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff80002f0f1218) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff837d2fc0,ffff80002a7b0348) at timeout_run+0xc2 sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7b0348,0) 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 pool_put(ffffffff83883c90,fffffd806d7fa148) at pool_put+0x27a sys/kern/subr_pool.c:814 uvm_unmap_detach(ffff80002a8cfc10,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd806cb30b90) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a788fb8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a788fb8,ffff80002a8cfdd0,ffff80002a8cfd20) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a8cfdd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8cfdd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72d622ff8080, count: -14