uvm_fault(0xffffffff83a600b0, 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 kcov_remote_enter(0,ffff80002a79c010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83952e90,ffffffff83a119e0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffffffff83a119e0,0) 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 pmap_do_remove(fffffd806d178d88,13874e82000,13875281000,0) at pmap_do_remove+0x70a sys/arch/amd64/amd64/pmap.c:1828 uvm_unmap_kill_entry_withlock(fffffd806cad0d00,fffffd806ac69a50,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a7582c8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a7582c8,ffff800031cbd250,ffff800031cbd1a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031cbd250) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031cbd250) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78483305a8c0, 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(0xffffffff83a600b0, 0xffff800029ee6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a79c010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83952e90,ffffffff83a119e0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffffffff83a119e0,0) 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 pmap_do_remove(fffffd806d178d88,13874e82000,13875281000,0) at pmap_do_remove+0x70a sys/arch/amd64/amd64/pmap.c:1828 uvm_unmap_kill_entry_withlock(fffffd806cad0d00,fffffd806ac69a50,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a7582c8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a7582c8,ffff800031cbd250,ffff800031cbd1a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031cbd250) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031cbd250) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78483305a8c0, count: -14 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff800031cbcd50 rbx 0xffff80002a79c010 rdx 0xffff80002a7582c8 rcx 0xffff800029ee6000 rax 0xfffffd806cadae70 r8 0x13875200000 r9 0 r10 0xd6d51b9ab74bcb2f r11 0xa0c293cae16bccb9 r12 0xffffffff819fdcb0 rdrand r13 0xffffffff83a119e0 rdrand_tmo r14 0xffff80002a79c010 r15 0 rip 0xffffffff82620282 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff800031cbcd30 ss 0x10 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=318895 pid=39173 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=16, usrpri=50, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a7582c8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a758fc0,0xffffffff83a6a928 process=0xffff80002a750920 user=0xffff800031cb8000, vmspace=0xfffffd806cad0d00 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21376 225966 75805 0 3 0x80 fsleep syz-executor 21376 480755 75805 0 3 0x4000080 fifow syz-executor 39300 270969 42800 0 3 0x80 fsleep syz-executor 39300 62518 42800 0 3 0x4000080 sbwait syz-executor 78544 382003 48392 0 3 0x80 fsleep syz-executor 78544 225483 48392 0 3 0x4000080 ttyout syz-executor 19982 331456 50922 0 3 0x80 fsleep syz-executor 19982 146844 50922 0 3 0x4000080 kqread syz-executor 15984 343930 66620 0 3 0x80 fsleep syz-executor 15984 89908 66620 0 3 0x4000080 sbwait syz-executor 15984 185012 66620 0 3 0x4000080 sbwait syz-executor 86726 273557 59942 0 3 0x80 fsleep syz-executor 86726 327426 59942 0 3 0x4000080 sbwait syz-executor 77082 484241 0 0 3 0x14280 nfsidl nfsio 74342 469732 0 0 3 0x14280 nfsidl nfsio 96036 17199 0 0 3 0x14280 nfsidl nfsio 96658 42717 0 0 3 0x14280 nfsidl nfsio 42661 377326 0 0 3 0x14280 nfsidl nfsio 59180 169128 0 0 3 0x14280 nfsidl nfsio 7356 104071 0 0 3 0x14280 nfsidl nfsio 59256 111053 0 0 3 0x14280 nfsidl nfsio 42261 483628 0 0 3 0x14280 nfsidl nfsio 53634 373134 0 0 3 0x14280 nfsidl nfsio 13577 213398 0 0 3 0x14280 nfsidl nfsio 20570 43762 0 0 3 0x14280 nfsidl nfsio 90231 119368 0 0 3 0x14280 nfsidl nfsio 48852 257151 0 0 3 0x14280 nfsidl nfsio 47408 361459 0 0 3 0x14280 nfsidl nfsio 60331 148005 0 0 3 0x14280 nfsidl nfsio 82614 220364 0 0 3 0x14280 nfsidl nfsio 91538 237528 0 0 3 0x14280 nfsidl nfsio 88362 436323 0 0 3 0x14280 nfsidl nfsio 83970 240530 0 0 3 0x14280 nfsidl nfsio 5733 430430 40036 0 3 0x80 fsleep syz-executor 5733 385544 40036 0 3 0x4000080 ttyout syz-executor 90307 318276 1 0 3 0x80 nanoslp init 42800 314422 52957 0 3 0x82 nanoslp syz-executor 48392 136363 52957 0 3 0x82 nanoslp syz-executor 50922 282762 52957 0 3 0x82 nanoslp syz-executor 75805 171489 52957 0 3 0x82 nanoslp syz-executor 59942 154713 52957 0 3 0x82 nanoslp syz-executor 40036 239922 52957 0 3 0x82 nanoslp syz-executor 66620 141881 52957 0 3 0x82 nanoslp syz-executor 16311 13523 52957 0 3 0x82 nanoslp syz-executor 52957 105187 1 0 3 0x82 kqread syz-executor 10993 29002 1 0 3 0x1000008a kqread sshd 71089 162060 90345 73 3 0x1100090 kqread syslogd 90345 259816 1 0 3 0x100082 sbwait syslogd 83851 404162 1 0 3 0x100080 kqread resolvd 85769 114512 64258 77 3 0x100092 kqread dhcpleased 91447 129290 64258 77 3 0x100092 kqread dhcpleased 64258 88895 1 0 3 0x80 kqread dhcpleased 44084 158756 0 0 3 0x14200 bored smr 54539 302906 0 0 3 0x14200 pgzero zerothread 75298 516383 0 0 3 0x14200 aiodoned aiodoned 95109 296365 0 0 3 0x14200 syncer update 9568 101176 0 0 3 0x14200 cleaner cleaner 45912 447282 0 0 3 0x14200 reaper reaper 18418 507453 0 0 3 0x14200 pgdaemon pagedaemon 69530 109173 0 0 3 0x14200 bored viomb 15126 352437 0 0 3 0x40014200 acpi0 acpi0 79649 75082 0 0 3 0x14200 bored softnet0 50079 404062 0 0 3 0x14200 bored systqmp 5115 52719 0 0 3 0x14200 bored systq 16397 198618 0 0 3 0x40014200 tmoslp softclock 8320 20857 0 0 3 0x40014200 idle0 1 469412 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 11042 12230K 12428K 166960K 12390 0 pcb 17 14K 16K 166960K 145 0 rtable 204 5K 7K 166960K 392 0 pf 27 12K 20K 166960K 53 0 ifaddr 35 6K 7K 166960K 49 0 ifgroup 39 1K 2K 166960K 63 0 sysctl 4 1K 9K 166960K 9 0 counters 31 17K 18K 166960K 37 0 ioctlops 0 0K 4K 166960K 124 0 iov 1 12K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1292 81K 82K 166960K 1567 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 400 0 proc 51 50K 83K 166960K 542 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 161 0 in_multi 77 5K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 18 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 390 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 201 130K 159K 166960K 5099 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 32 64K 92K 166960K 1478 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 9 0K 2K 166960K 31 0 temp 41 9107K 9171K 166960K 15984 0 kqueue 11 16K 26K 166960K 77 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 47 0 44 1 0 1 1 0 8 0 rtentry 136 121 0 31 4 0 4 4 0 8 0 unpcb 144 175 0 153 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 101 0 98 4 0 4 4 0 8 3 arp 96 19 0 4 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 328 348 0 342 6 0 6 6 0 8 5 ip6q 72 1 0 0 1 0 1 1 0 8 0 nd6 112 27 0 9 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 2 0 2 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstkey 128 3 0 3 1 0 1 1 0 8 1 pfstate 384 2 0 2 1 0 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 478 0 107 30 0 30 30 0 8 4 art_table 40 480 0 107 5 0 5 5 0 8 0 art_node 32 120 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 12 0 2 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2062 0 607 92 0 92 92 0 8 0 ffsino 256 2062 0 607 92 0 92 92 0 8 0 nchpl 144 2575 0 881 64 0 64 64 0 8 0 vnodes 216 2237 0 0 125 0 125 125 0 8 0 namei 1024 7943 0 7943 2 0 2 2 0 8 2 kstatmem 264 31 0 12 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 15465 0 15465 8 0 8 8 1 8 8 plimitpl 152 63 0 48 1 0 1 1 0 8 0 sigapl 424 698 0 637 7 0 7 7 0 8 0 knotepl 120 14201 0 14159 22 12 10 17 0 8 8 kqueuepl 184 97 0 89 1 0 1 1 0 8 0 pipepl 304 136 0 109 3 0 3 3 0 8 0 fdescpl 448 665 0 639 5 0 5 5 0 8 1 filepl 120 3054 0 2844 9 0 9 9 0 8 2 lockfpl 104 87 0 85 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 29 0 22 1 0 1 1 0 8 0 pgrppl 48 37 0 22 1 0 1 1 0 8 0 ucredpl 104 320 0 309 1 0 1 1 0 8 0 zombiepl 144 639 0 637 1 0 1 1 0 8 0 processpl 1152 698 0 637 5 0 5 5 0 8 0 procpl 664 1084 0 1015 7 0 7 7 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 577 0 546 7 0 7 7 0 8 4 mcl64k 65536 59 0 59 1 0 1 1 0 8 1 mcl16k 16384 9 0 9 1 0 1 1 0 8 1 mcl12k 12288 5 0 5 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 1 0 1 1 0 8 1 mcl4k 4096 2856 0 2799 14 0 14 14 0 8 6 mcl2k 2048 300 0 296 1 0 1 1 0 8 0 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 6820 0 6667 11 0 11 11 0 8 0 bufpl 280 6235 0 105 438 0 438 438 0 8 0 anonpl 24 122709 0 120008 46 0 46 46 0 186 12 amapchunkpl 152 15674 0 15230 25 0 25 25 0 158 7 amappl16 200 2402 0 2375 16 1 15 15 0 8 8 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 487 0 487 1 0 1 1 0 8 1 amappl13 176 124 0 117 1 0 1 1 0 8 0 amappl12 168 931 0 906 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 0 1 1 0 8 1 amappl8 136 95 0 94 1 0 1 1 0 8 0 amappl7 128 140 0 130 1 0 1 1 0 8 0 amappl6 120 149 0 148 1 0 1 1 0 8 0 amappl5 112 90 0 84 1 0 1 1 0 8 0 amappl4 104 296 0 281 1 0 1 1 0 8 0 amappl3 96 3037 0 2935 3 0 3 3 0 8 0 amappl2 88 529 0 484 2 0 2 2 0 8 0 amappl1 80 11821 0 11456 13 0 13 13 0 8 4 amappl 88 4357 0 4208 4 0 4 4 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 665 0 638 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 665 0 638 1 0 1 1 0 8 0 vmmpekpl 168 7472 0 7440 2 0 2 2 0 8 0 vmmpepl 168 51577 0 50100 91 0 91 91 0 357 18 vmsppl 368 664 0 638 4 0 4 4 0 8 1 rwobjpl 40 17845 0 17061 13 0 13 13 0 8 1 pdppl 4096 1336 0 1276 92 30 62 78 0 8 2 pvpl 32 312693 0 305245 108 0 108 108 0 265 26 pmappl 216 664 0 638 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 359 0 30 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002a79c010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83952e90,ffffffff83a119e0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffffffff83a119e0,0) 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 pmap_do_remove(fffffd806d178d88,13874e82000,13875281000,0) at pmap_do_remove+0x70a sys/arch/amd64/amd64/pmap.c:1828 uvm_unmap_kill_entry_withlock(fffffd806cad0d00,fffffd806ac69a50,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a7582c8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a7582c8,ffff800031cbd250,ffff800031cbd1a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031cbd250) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031cbd250) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78483305a8c0, count: -14 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff80002a79c010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83952e90,ffffffff83a119e0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffffffff83a119e0,0) 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 pmap_do_remove(fffffd806d178d88,13874e82000,13875281000,0) at pmap_do_remove+0x70a sys/arch/amd64/amd64/pmap.c:1828 uvm_unmap_kill_entry_withlock(fffffd806cad0d00,fffffd806ac69a50,0) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cad0d00) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80002a7582c8,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a7582c8,ffff800031cbd250,ffff800031cbd1a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800031cbd250) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800031cbd250) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78483305a8c0, count: -14 ddb>