uvm_fault(0xffffffff83a01318, 0xffff800029f06000, 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 * 54321 23538 0 0 0 0 syz-executor kcov_remote_enter(0,ffff80002a7be890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83882930,ffff80002a756b00) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a756b00,0) 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: 0x70fa7829e690, 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(0xffffffff83a01318, 0xffff800029f06000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a7be890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83882930,ffff80002a756b00) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a756b00,0) 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: 0x70fa7829e690, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff80003c961ae0 rbx 0xffff80002a7be890 rdx 0xffff800035cde7f0 rcx 0xffff800029f06000 rax 0xfffffd806ccc7cf0 r8 0 r9 0 r10 0xbc7ff48cf05a286 r11 0xe277129fc014bd82 r12 0xffffffff81735ab0 endtsleep r13 0xffff80002a756a68 r14 0xffff80002a7be890 r15 0 rip 0xffffffff82d29622 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003c961ac0 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=54321 pid=23538 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=0xffff800035cde2c0,0xffff800035cded30 process=0xffff8000ffffba98 user=0xffff80003c95c000, vmspace=0xfffffd806ccbcd00 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *23538 54321 30548 0 7 0 syz-executor 23538 206296 30548 0 2 0x4000000 syz-executor 4636 113645 5772 0 2 0x1 syz-executor 4636 117018 5772 0 3 0x4000081 fsleep syz-executor 4636 384771 5772 0 3 0x4000081 fsleep syz-executor 4636 144029 5772 0 3 0x4000081 fsleep syz-executor 99657 450966 40426 0 2 0 syz-executor 99657 502713 40426 0 3 0x4000080 fifor syz-executor 95762 10808 61632 0 2 0 syz-executor 95762 149165 61632 0 3 0x4000080 fsleep syz-executor 95762 413558 61632 0 3 0x4000080 fsleep syz-executor 40716 215929 47560 0 2 0 syz-executor 40716 36170 47560 0 3 0x4000000 smrbar syz-executor 40716 210334 47560 0 2 0x4000000 syz-executor 40716 502291 47560 0 3 0x4000080 ttyin syz-executor 58156 116801 40648 0 2 0xc80 syz-executor 58156 270382 40648 0 3 0x4000080 fsleep syz-executor 58156 321704 40648 0 3 0x4000080 lockf syz-executor 40648 503981 4041 0 3 0x82 nanoslp syz-executor 40426 390274 4041 0 3 0x82 nanoslp syz-executor 5772 433112 4041 0 3 0x82 nanoslp syz-executor 47560 57737 4041 0 3 0x82 nanoslp syz-executor 61632 522594 4041 0 3 0x82 nanoslp syz-executor 30548 129333 4041 0 3 0x82 nanoslp syz-executor 36774 507719 4041 0 2 0x2 syz-executor 29962 362645 4041 0 2 0x2 syz-executor 4041 181877 98533 0 3 0x82 kqread syz-executor 98533 142589 86897 0 3 0x10008a sigsusp ksh 86897 495977 8157 0 3 0x98 kqread sshd-session 8157 310044 72384 0 3 0x92 kqread sshd-session 46735 519551 1 0 3 0x100083 ttyin getty 72384 448358 1 0 3 0x88 kqread sshd 65157 41318 2703 73 3 0x1100090 kqread syslogd 2703 193837 1 0 3 0x100082 sbwait syslogd 82232 169247 1 0 3 0x100080 kqread resolvd 22284 165758 15751 77 3 0x100092 kqread dhcpleased 42616 389207 15751 77 3 0x100092 kqread dhcpleased 15751 254617 1 0 3 0x80 kqread dhcpleased 73731 261827 0 0 3 0x14200 bored smr 81344 410226 0 0 2 0x14200 zerothread 54633 358100 0 0 3 0x14200 aiodoned aiodoned 13455 195698 0 0 3 0x14200 syncer update 99100 156267 0 0 3 0x14200 cleaner cleaner 18585 288072 0 0 3 0x14200 reaper reaper 94636 436206 0 0 3 0x14200 pgdaemon pagedaemon 69235 319382 0 0 3 0x14200 bored viomb 20609 16159 0 0 3 0x40014200 acpi0 acpi0 77989 8343 0 0 3 0x14200 bored softnet0 40300 502686 0 0 3 0x14200 bored systqmp 7180 402189 0 0 3 0x14200 bored systq 56219 515957 0 0 3 0x40014200 tmoslp softclock 88012 200497 0 0 3 0x40014200 idle0 1 196192 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 11041 12107K 12380K 166960K 12292 0 pcb 19 14K 15K 166960K 43 0 rtable 221 6K 8K 166960K 388 0 pf 33 13K 18K 166960K 57 0 ifaddr 44 7K 7K 166960K 52 0 ifgroup 52 2K 2K 166960K 61 0 sysctl 3 1K 9K 166960K 8 0 counters 34 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 55 0 iov 0 0K 12K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1327 83K 84K 166960K 1552 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 270 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 91K 166960K 506 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 16 0 in_multi 102 7K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 376 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 226 150K 168K 166960K 4253 0 UVM aobj 4 2K 4K 166960K 5 0 pinsyscall 37 74K 94K 166960K 1361 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 12 0K 2K 166960K 31 0 temp 45 9068K 9132K 166960K 8159 0 kqueue 15 24K 29K 166960K 55 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 45 0 42 1 0 1 1 0 8 0 rtentry 136 119 0 19 4 0 4 4 0 8 0 unpcb 144 150 0 132 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 113 0 109 7 0 7 7 0 8 6 arp 96 19 0 1 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 33 0 32 1 0 1 1 0 8 0 inpcb 328 301 0 257 7 0 7 7 0 8 3 nd6 112 24 0 0 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 5 0 4 1 0 1 1 0 8 0 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 4 0 4 1 0 1 1 0 8 1 pfanchor 1288 3 0 3 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 514 0 73 30 0 30 30 0 8 1 art_table 40 515 0 73 5 0 5 5 0 8 0 art_node 32 119 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 0 1 1 0 8 1 semapl 112 8 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1842 0 383 92 0 92 92 0 8 0 ffsino 256 1842 0 383 92 0 92 92 0 8 0 nchpl 144 2228 0 526 64 0 64 64 0 8 0 vnodes 216 2055 0 0 115 0 115 115 0 8 0 namei 1024 7116 0 7116 2 0 2 2 0 8 2 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 30 0 6 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11683 0 11683 8 0 8 8 1 8 8 plimitpl 152 44 0 28 1 0 1 1 0 8 0 sigapl 424 562 0 521 6 0 6 6 0 8 1 knotepl 120 9458 0 9101 17 6 11 16 0 8 0 kqueuepl 184 66 0 54 1 0 1 1 0 8 0 pipepl 304 161 0 134 5 0 5 5 0 8 2 fdescpl 448 549 0 521 5 0 5 5 0 8 1 filepl 120 2707 0 2320 13 0 13 13 0 8 1 lockfpl 104 118 0 114 1 0 1 1 0 8 0 lockfspl 48 60 0 57 1 0 1 1 0 8 0 sessionpl 144 61 0 52 1 0 1 1 0 8 0 pgrppl 48 70 0 53 1 0 1 1 0 8 0 ucredpl 104 229 0 217 1 0 1 1 0 8 0 zombiepl 144 521 0 521 1 0 1 1 0 8 1 processpl 1152 562 0 521 4 0 4 4 0 8 0 procpl 664 781 0 728 6 0 6 6 0 8 0 sockpl 552 504 0 439 8 0 8 8 0 8 3 mcl64k 65536 45 0 45 1 0 1 1 0 8 1 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 2674 0 2624 14 0 14 14 0 8 7 mcl2k 2048 312 0 311 1 0 1 1 0 8 0 mtagpl 96 8 0 4 1 0 1 1 0 8 0 mbufpl 256 5480 0 5334 11 0 11 11 0 8 0 bufpl 280 6707 0 492 445 0 445 445 0 8 0 anonpl 24 121012 0 117867 52 0 52 52 0 187 19 amapchunkpl 152 12788 0 12304 29 0 29 29 0 158 7 amappl16 200 2514 0 2487 15 0 15 15 0 8 11 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 420 0 419 1 0 1 1 0 8 0 amappl13 176 117 0 107 1 0 1 1 0 8 0 amappl12 168 787 0 760 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 74 0 64 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 0 1 1 0 8 1 amappl8 136 111 0 109 1 0 1 1 0 8 0 amappl7 128 143 0 131 1 0 1 1 0 8 0 amappl6 120 152 0 151 1 0 1 1 0 8 0 amappl5 112 109 0 101 1 0 1 1 0 8 0 amappl4 104 260 0 245 1 0 1 1 0 8 0 amappl3 96 2301 0 2189 4 0 4 4 0 8 0 amappl2 88 515 0 462 2 0 2 2 0 8 0 amappl1 80 10025 0 9472 16 0 16 16 0 8 3 amappl 88 3542 0 3379 5 0 5 5 0 92 0 uvmvnodes 80 104 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 4 0 1 1 0 1 1 0 8 0 uaddrrnd 24 549 0 521 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 521 1 0 1 1 0 8 0 vmmpekpl 168 6281 0 6251 2 0 2 2 0 8 0 vmmpepl 168 43792 0 42050 101 0 101 101 0 357 19 vmsppl 368 548 0 521 4 0 4 4 0 8 1 rwobjpl 40 15806 0 14841 14 0 14 14 0 8 1 pdppl 4096 1104 0 1042 94 24 70 80 0 8 8 pvpl 32 275231 0 266815 118 0 118 118 0 265 26 pmappl 216 548 0 521 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 364 0 24 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002a7be890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83882930,ffff80002a756b00) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a756b00,0) 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: 0x70fa7829e690, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff80002a7be890) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83882930,ffff80002a756b00) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a756b00,0) 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: 0x70fa7829e690, count: -7