uvm_fault(0xffffffff839aafd0, 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 * 47060 33268 0 0 0 0 syz-executor kcov_remote_enter(0,ffff80002a79c490) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838a2f00,ffff80002a7665d8) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7665d8,0) 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: 0x75bbe6d00210, 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(0xffffffff839aafd0, 0xffff800029ee6000, 0, 2) -> e ddb> show kasan No such command ddb> trace kcov_remote_enter(0,ffff80002a79c490) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838a2f00,ffff80002a7665d8) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7665d8,0) 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: 0x75bbe6d00210, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c17f00 rbp 0xffff80003b0ed3e0 rbx 0xffff80002a79c490 rdx 0xffff80003a8e02c8 rcx 0xffff800029ee6000 rax 0xfffff6006d196f60 r8 0 r9 0 r10 0x607d41d8f83c5088 r11 0x5e182c495f892697 r12 0xffffffff82c6f510 endtsleep r13 0xffff80002a766540 r14 0xffff80002a79c490 r15 0 rip 0xffffffff8234bd42 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003b0ed3c0 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=47060 pid=33268 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a8e1a20,0xffff80003a8e1268 process=0xffff80003c908920 user=0xffff80003b0e8000, vmspace=0xfffff6006d18a460 estcpu=36, cpticks=4, pctcpu=0.0, user=3, sys=0, intr=1 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 63529 341714 28284 0 2 0 0 syz-executor 63529 75049 28284 0 3 0 0x4000080 wsevent_r syz-executor 44531 193419 69059 0 2 0 0 syz-executor 44531 400590 69059 0 3 0 0x4000080 bell syz-executor 44531 317217 69059 0 2 0 0x4000000 syz-executor 57603 175775 85972 0 2 0 0 syz-executor 57603 273982 85972 0 2 0 0x4000000 syz-executor *33268 47060 13210 0 7 0 0 syz-executor 33268 62055 13210 0 3 0 0x4000080 fsleep syz-executor 33268 22018 13210 0 2 0 0x4000000 syz-executor 57689 272749 21204 0 2 0 0 syz-executor 57689 124444 21204 0 3 0 0x4000080 fsleep syz-executor 66063 242464 17169 0 2 0 0 syz-executor 66063 222563 17169 0 3 0 0x4000080 fsleep syz-executor 17169 306146 13989 0 3 0x2 0x80 nanoslp syz-executor 97481 17560 0 0 3 0x14000 0x200 acct acct 38991 296467 0 0 3 0x14000 0x280 nfsidl nfsio 91799 80779 0 0 3 0x14000 0x280 nfsidl nfsio 4131 450671 0 0 3 0x14000 0x280 nfsidl nfsio 1918 410983 0 0 3 0x14000 0x280 nfsidl nfsio 38291 255180 0 0 3 0x14000 0x280 nfsidl nfsio 60594 423994 0 0 3 0x14000 0x280 nfsidl nfsio 28149 226033 0 0 3 0x14000 0x280 nfsidl nfsio 77989 143714 0 0 3 0x14000 0x280 nfsidl nfsio 77961 24654 0 0 3 0x14000 0x280 nfsidl nfsio 92406 193605 0 0 3 0x14000 0x280 nfsidl nfsio 48002 509704 0 0 3 0x14000 0x280 nfsidl nfsio 63423 253946 0 0 3 0x14000 0x280 nfsidl nfsio 80988 497544 0 0 3 0x14000 0x280 nfsidl nfsio 76710 94593 0 0 3 0x14000 0x280 nfsidl nfsio 30018 348840 0 0 3 0x14000 0x280 nfsidl nfsio 87474 153850 0 0 3 0x14000 0x280 nfsidl nfsio 67304 386757 0 0 3 0x14000 0x280 nfsidl nfsio 77513 118104 0 0 3 0x14000 0x280 nfsidl nfsio 46490 165768 0 0 3 0x14000 0x280 nfsidl nfsio 8748 120981 0 0 3 0x14000 0x280 nfsidl nfsio 85972 200420 13989 0 3 0x2 0x80 nanoslp syz-executor 28284 481683 13989 0 3 0x2 0x80 nanoslp syz-executor 13210 478692 13989 0 3 0x2 0x80 nanoslp syz-executor 69059 363487 13989 0 3 0x2 0x80 nanoslp syz-executor 21204 362985 13989 0 3 0x2 0x80 nanoslp syz-executor 13989 7280 73918 0 3 0x2 0x80 wait syz-executor 73918 463328 3648 0 3 0x100002 0x88 sigsusp ksh 3648 483263 90515 0 3 0x10 0x88 kqread sshd-session 90515 28122 89111 0 3 0x12 0x80 kqread sshd-session 53826 413993 1 0 3 0x100003 0x80 ttyin getty 89111 272466 1 0 3 0 0x88 kqread sshd 61505 242265 55201 73 3 0x1100010 0x80 kqread syslogd 55201 494421 1 0 3 0x100002 0x80 sbwait syslogd 43175 147829 1 0 3 0x100000 0x80 kqread resolvd 58021 47655 85597 77 3 0x100012 0x80 kqread dhcpleased 2307 513847 85597 77 3 0x100012 0x80 kqread dhcpleased 85597 211299 1 0 3 0 0x80 kqread dhcpleased 3948 322594 0 0 3 0x14000 0x200 bored smr 53426 267963 0 0 2 0x14000 0x200 zerothread 29428 360626 0 0 3 0x14000 0x200 aiodoned aiodoned 50002 352367 0 0 3 0x14000 0x200 syncer update 93416 500974 0 0 3 0x14000 0x200 cleaner cleaner 54127 138190 0 0 3 0x14000 0x200 reaper reaper 48039 21359 0 0 3 0x14000 0x200 pgdaemon pagedaemon 93725 289050 0 0 3 0x14000 0x200 bored viomb 52390 54055 0 0 3 0x14000 0x40000200 acpi0 acpi0 16494 421989 0 0 3 0x14000 0x200 bored softnet0 83848 358185 0 0 3 0x14000 0x200 bored systqmp 58809 164978 0 0 3 0x14000 0x200 bored systq 43564 480611 0 0 3 0x14000 0x40000200 tmoslp softclock 41909 379852 0 0 3 0x14000 0x40000200 idle0 1 483642 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11054 12252K 13186K 166960K 13202 0 pcb 17 13K 14K 166960K 122 0 rtable 216 8K 10K 166960K 668 0 pf 34 13K 72K 166960K 101 0 ifaddr 37 6K 8K 166960K 95 0 ifgroup 54 2K 2K 166960K 127 0 sysctl 4 1K 9K 166960K 10 0 counters 34 17K 18K 166960K 92 0 ioctlops 0 0K 4K 166960K 223 0 iov 0 0K 16K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1488 94K 94K 166960K 2118 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 37 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 57K 97K 166960K 708 0 sigio 0 0K 0K 166960K 9 0 proc 60 59K 124K 166960K 789 0 subproc 72 4K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 29 0 in_multi 74 5K 7K 166960K 194 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 505 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 205 150K 166K 166960K 7454 0 UVM aobj 16 2K 2K 166960K 18 0 pinsyscall 37 74K 96K 166960K 2016 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 14 0K 2K 166960K 64 0 temp 39 9107K 9170K 166960K 21641 0 kqueue 13 20K 32K 166960K 130 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 120 108 0 105 2 0 2 2 0 8 1 rtentry 136 212 0 124 4 0 4 4 0 8 0 unpcb 144 463 0 448 6 0 6 6 0 8 5 syncache 336 9 0 9 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 119 0 114 1 0 1 1 0 8 0 arp 96 36 0 19 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 594 0 586 4 0 4 4 0 8 3 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 112 51 0 35 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1072 44 0 44 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 6 1 0 1 1 0 8 0 pfstate 384 4 0 3 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 0 1 1 0 8 1 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 844 0 487 29 0 29 29 0 8 4 art_table 40 846 0 487 5 0 5 5 0 8 0 art_node 32 210 0 129 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 31 0 22 1 0 1 1 0 8 0 shmpl 112 15 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2438 0 968 93 0 93 93 0 8 0 ffsino 256 2438 0 968 93 0 93 93 0 8 0 nchpl 144 3265 0 1539 65 0 65 65 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 3069 0 0 171 0 171 171 0 8 0 namei 1024 11854 0 11854 2 1 1 2 0 8 1 kstatmem 264 65 0 40 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 16880 0 16880 10 2 8 8 1 8 8 plimitpl 152 103 0 87 1 0 1 1 0 8 0 sigapl 424 1008 0 946 9 1 8 8 0 8 0 knotepl 120 24188 0 24141 35 25 10 27 0 8 8 kqueuepl 184 282 0 273 6 0 6 6 0 8 5 pipepl 304 175 0 148 3 0 3 3 0 8 0 fdescpl 448 974 0 946 5 1 4 5 0 8 0 filepl 120 5518 0 5314 11 0 11 11 0 8 4 lockfpl 104 464 0 462 3 0 3 3 0 8 2 lockfspl 48 98 0 96 1 0 1 1 0 8 0 sessionpl 144 49 0 41 1 0 1 1 0 8 0 pgrppl 48 68 0 52 1 0 1 1 0 8 0 ucredpl 104 853 0 841 1 0 1 1 0 8 0 zombiepl 144 948 0 946 2 1 1 1 0 8 0 processpl 1152 1008 0 946 5 0 5 5 0 8 0 procpl 664 1696 0 1626 7 0 7 7 0 8 0 sockpl 552 1341 0 1315 12 1 11 12 0 8 8 mcl64k 65536 23 0 23 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 2 1 1 1 0 8 1 mcl4k 4096 3140 0 3088 13 4 9 13 0 8 1 mcl2k 2048 578 0 577 1 0 1 1 0 8 0 mextrefs 64 254 0 254 1 0 1 1 0 8 1 mtagpl 96 10 0 10 2 1 1 1 0 8 1 mbufpl 256 9721 0 9556 24 6 18 18 0 8 4 bufpl 272 6330 0 114 415 0 415 415 0 8 0 anonpl 24 155512 0 152454 63 0 63 63 0 187 28 amapchunkpl 152 30474 0 30063 35 1 34 34 0 158 16 amappl16 200 2964 0 2937 28 14 14 24 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 519 0 518 1 0 1 1 0 8 0 amappl13 176 151 0 141 1 0 1 1 0 8 0 amappl12 168 1240 0 1213 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 61 0 51 1 0 1 1 0 8 0 amappl9 144 271 0 271 1 1 0 1 0 8 0 amappl8 136 130 0 129 1 0 1 1 0 8 0 amappl7 128 189 0 176 1 0 1 1 0 8 0 amappl6 120 236 0 234 1 0 1 1 0 8 0 amappl5 112 92 0 84 1 0 1 1 0 8 0 amappl4 104 281 0 266 1 0 1 1 0 8 0 amappl3 96 4713 0 4616 4 0 4 4 0 8 1 amappl2 88 585 0 532 2 0 2 2 0 8 0 amappl1 80 12931 0 12383 14 2 12 14 0 8 0 amappl 88 6562 0 6419 5 0 5 5 0 92 1 uvmvnodes 80 109 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 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 17 0 2 1 0 1 1 0 8 0 uaddrrnd 24 974 0 946 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 974 0 946 1 0 1 1 0 8 0 vmmpekpl 168 9149 0 9108 3 0 3 3 0 8 0 vmmpepl 168 69623 0 67909 102 2 100 100 0 357 21 vmsppl 368 973 0 946 4 1 3 4 0 8 0 rwobjpl 40 21477 0 20533 16 1 15 15 0 8 2 pdppl 4096 1954 0 1892 124 58 66 82 0 8 4 pvpl 32 435926 0 427795 131 4 127 127 0 265 43 pmappl 216 973 0 946 3 0 3 3 0 8 1 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 819 0 75 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002a79c490) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838a2f00,ffff80002a7665d8) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7665d8,0) 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: 0x75bbe6d00210, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff80002a79c490) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838a2f00,ffff80002a7665d8) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7665d8,0) 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: 0x75bbe6d00210, count: -7