login: ¹j¼õ¬|ÿ ž¨E1\…:uvm_fault(0xffffffff83ad1680, 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 *266956 81593 0 0 0 0 syz-executor kcov_remote_enter(0,ffff80002a788010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838d2830,ffff80002a76d568) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a76d568,0) 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: 0x74587caddfe0, 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(0xffffffff83ad1680, 0xffff800029ee6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a788010) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838d2830,ffff80002a76d568) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a76d568,0) 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: 0x74587caddfe0, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff80002a84d520 rbx 0xffff80002a788010 rdx 0xffff80003c900d18 rcx 0xffff800029ee6000 rax 0xfffffd806cacced0 r8 0 r9 0 r10 0x603f8b468fd9e3c3 r11 0x183677260680c5b r12 0xffffffff81c62b70 endtsleep r13 0xffff80002a76d4d0 r14 0xffff80002a788010 r15 0 rip 0xffffffff8295b502 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a84d500 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=266956 pid=81593 tcnt=2 stat=onproc flags process=0 proc=0 runpri=79, usrpri=79, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a765ca0,0xffff80003c900560 process=0xffff80003c4d8498 user=0xffff80002a848000, vmspace=0xfffffd806cac4180 estcpu=29, cpticks=5, pctcpu=0.0, user=4, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *81593 266956 62666 0 7 0 syz-executor 81593 205266 62666 0 2 0x4000000 syz-executor 70526 105164 4171 0 2 0 syz-executor 70526 172477 4171 0 3 0x4000080 fsleep syz-executor 60774 326072 1 0 3 0x100083 ttyin getty 68633 492823 25380 0 3 0x3000 suspend syz-executor 68633 385538 25380 0 3 0x4081000 biowait syz-executor 68633 108808 25380 0 3 0x4081000 inode syz-executor 77232 100575 0 0 3 0x14280 nfsidl nfsio 43153 465189 0 0 3 0x14280 nfsidl nfsio 31414 339526 0 0 3 0x14280 nfsidl nfsio 74315 251658 0 0 3 0x14280 nfsidl nfsio 50276 452044 0 0 3 0x14280 nfsidl nfsio 47093 240395 0 0 3 0x14280 nfsidl nfsio 46774 328181 0 0 3 0x14280 nfsidl nfsio 35445 489230 0 0 3 0x14280 nfsidl nfsio 50079 200456 0 0 3 0x14280 nfsidl nfsio 8421 228430 0 0 3 0x14280 nfsidl nfsio 70558 203129 0 0 3 0x14280 nfsidl nfsio 3392 195276 0 0 3 0x14280 nfsidl nfsio 71521 265188 0 0 3 0x14280 nfsidl nfsio 72874 397634 0 0 3 0x14280 nfsidl nfsio 17667 218537 0 0 3 0x14280 nfsidl nfsio 46557 434743 0 0 3 0x14280 nfsidl nfsio 75822 118806 0 0 3 0x14280 nfsidl nfsio 28573 317743 0 0 3 0x14280 nfsidl nfsio 77000 161743 0 0 3 0x14280 nfsidl nfsio 7228 333392 0 0 3 0x14280 nfsidl nfsio 62666 433307 74230 0 3 0x82 nanoslp syz-executor 4171 168994 74230 0 3 0x82 nanoslp syz-executor 25380 28911 74230 0 3 0x82 wait syz-executor 35689 503097 74230 0 3 0x82 nanoslp syz-executor 74230 305 1 0 3 0x82 nanoslp syz-executor 99267 495690 1 0 3 0x8a kqread sshd 71723 202206 43351 73 3 0x1100090 kqread syslogd 43351 313961 1 0 3 0x100082 sbwait syslogd 10743 102443 1 0 3 0x100080 kqread resolvd 11910 132483 61148 77 3 0x100092 kqread dhcpleased 44680 469990 61148 77 3 0x100092 kqread dhcpleased 61148 233176 1 0 3 0x80 kqread dhcpleased 861 203300 0 0 3 0x14200 bored smr 65242 105600 0 0 2 0x14200 zerothread 46539 506234 0 0 3 0x14200 aiodoned aiodoned 13403 367518 0 0 3 0x14200 syncer update 64110 35977 0 0 3 0x14200 cleaner cleaner 27124 272542 0 0 3 0x14200 reaper reaper 1179 135342 0 0 3 0x14200 pgdaemon pagedaemon 77912 105055 0 0 3 0x14200 bored viomb 73840 93000 0 0 3 0x40014200 acpi0 acpi0 77688 225045 0 0 3 0x14200 bored softnet0 53520 292872 0 0 3 0x14200 bored systqmp 72664 359087 0 0 3 0x14200 bored systq 55513 147575 0 0 3 0x40014200 tmoslp softclock 3739 101466 0 0 3 0x40014200 idle0 1 215905 0 0 3 0x80082 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 11055 12259K 12602K 166960K 12842 0 pcb 18 13K 14K 166960K 134 0 rtable 187 14K 15K 166960K 530 0 pf 35 14K 19K 166960K 63 0 ifaddr 34 5K 7K 166960K 55 0 ifgroup 54 2K 2K 166960K 76 0 sysctl 3 1K 9K 166960K 7 0 counters 34 17K 18K 166960K 45 0 ioctlops 0 0K 4K 166960K 189 0 iov 0 0K 12K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1360 86K 86K 166960K 2006 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 27 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 89K 166960K 552 0 sigio 0 0K 0K 166960K 1 0 proc 63 67K 100K 166960K 544 0 subproc 63 3K 5K 166960K 171 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 31 0 in_multi 66 4K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 20 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 420 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 171 125K 165K 166960K 6459 0 UVM aobj 14 2K