uvm_fault(0xffffffff83ab2910, 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 *267319 87366 0 0 0x4000000 0 syz-executor kcov_remote_enter(0,ffff80002a79d690) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83944aa0,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7360a0,0) 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 writedisklabel(d02,ffffffff81e2efd0,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001584800,3,ffff80002a7379f8) at sdioctl+0x90a sys/scsi/sd.c:913 VOP_IOCTL(fffff400702a56f0,84946467,ffff800001584800,3,fffff40007ffd6e8,ffff80002a7379f8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff4007c544448,84946467,ffff800001584800,ffff80002a7379f8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff80002a7379f8,ffff80002ccab330,ffff80002ccab280) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccab330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccab330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd490e685ff0, 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(0xffffffff83ab2910, 0xffff800029ee6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a79d690) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83944aa0,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7360a0,0) 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 writedisklabel(d02,ffffffff81e2efd0,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001584800,3,ffff80002a7379f8) at sdioctl+0x90a sys/scsi/sd.c:913 VOP_IOCTL(fffff400702a56f0,84946467,ffff800001584800,3,fffff40007ffd6e8,ffff80002a7379f8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff4007c544448,84946467,ffff800001584800,ffff80002a7379f8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff80002a7379f8,ffff80002ccab330,ffff80002ccab280) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccab330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccab330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd490e685ff0, count: -14 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff80002ccaaca0 rbx 0xffff80002a79d690 rdx 0xffff80002a7379f8 rcx 0xffff800029ee6000 rax 0xfffff4006cfe1db0 r8 0 r9 0x201 r10 0xff8bcb81d18196de r11 0x20290d4a7d94becf r12 0xffffffff8200b8e0 endtsleep r13 0xffff80002a736008 r14 0xffff80002a79d690 r15 0 rip 0xffffffff82d186a2 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002ccaac80 ss 0x10 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=267319 pid=87366 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7374c8,0xffff80003c8f9cc8 process=0xffff800045ff9f98 user=0xffff80002cca6000, vmspace=0xfffff4007c5d5d08 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 49259 30073 93860 60929 2 0x10 syz-executor 49259 505080 93860 60929 3 0x4000090 fsleep syz-executor 57084 448316 20823 0 2 0 syz-executor 57084 191485 20823 0 3 0x4000080 fifow syz-executor 13216 435650 27937 0 2 0 syz-executor 13216 388499 27937 0 2 0x4000000 syz-executor 87366 472129 76428 0 2 0 syz-executor *87366 267319 76428 0 7 0x4000000 syz-executor 87366 19430 76428 0 3 0x4000080 fsleep syz-executor 93111 187025 71377 0 2 0 syz-executor 93111 111035 71377 0 3 0x4000080 lockf syz-executor 44670 452657 80395 0 2 0 syz-executor 44670 444266 80395 0 3 0x4000080 lockf syz-executor 44670 410497 80395 0 3 0x4000080 lockf syz-executor 28730 485869 74424 0 3 0x80 nanoslp syz-executor 28730 4857 74424 0 3 0x4000080 kqsel syz-executor 28730 464190 74424 0 3 0x4000080 fsleep syz-executor 3161 455663 1 0 3 0x80 nanoslp init 93860 98044 70045 0 3 0x82 nanoslp syz-executor 51982 349101 70045 0 3 0x82 wait syz-executor 71377 464817 70045 0 3 0x82 nanoslp syz-executor 20823 437482 70045 0 3 0x82 nanoslp syz-executor 74424 48800 70045 0 3 0x82 nanoslp syz-executor 80395 202238 70045 0 3 0x82 nanoslp syz-executor 27937 300415 70045 0 3 0x82 nanoslp syz-executor 76428 223168 70045 0 3 0x82 nanoslp syz-executor 70045 17586 1 0 3 0x82 kqread syz-executor 26209 82648 0 0 3 0x14200 bored smr 95053 314013 0 0 2 0x14200 zerothread 78829 191612 0 0 3 0x14200 aiodoned aiodoned 20917 520500 0 0 3 0x14200 syncer update 53572 16758 0 0 3 0x14200 cleaner cleaner 46795 422828 0 0 3 0x14200 reaper reaper 15428 463093 0 0 3 0x14200 pgdaemon pagedaemon 8326 67381 0 0 3 0x14200 bored viomb 85955 235497 0 0 3 0x40014200 acpi0 acpi0 91809 80159 0 0 2 0x14200 softnet0 7654 178594 0 0 3 0x14200 bored systqmp 51995 512402 0 0 3 0x14200 bored systq 43582 102202 0 0 3 0x40014200 tmoslp softclock 32281 86769 0 0 3 0x40014200 idle0 1 146544 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 11040 12182K 12495K 166960K 12692 0 pcb 17 14K 16K 166960K 211 0 rtable 240 9K 9K 166960K 477 0 pf 35 13K 17K 166960K 65 0 ifaddr 38 6K 8K 166960K 59 0 ifgroup 58 2K 2K 166960K 91 0 sysctl 3 1K 9K 166960K 10 0 counters 35 18K 18K 166960K 48 0 ioctlops 1 2K 4K 166960K 179 0 iov 0 0K 16K 166960K 57 0 mount 1 1K 1K 166960K 1 0 log 2 0K 0K 166960K 6 0 vnodes 1293 81K 82K 166960K 1663 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 17 10K 10K 166960K 67 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 65K 106K 166960K 632 0 sigio 0 0K 0K 166960K 170 0 proc 11 17K 100K 166960K 568 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 1 0K 0K 166960K 85 0 in_multi 77 5K 7K 166960K 121 0 ether_multi 1 0K 0K 166960K 1 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 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 404 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 138 79K 160K 166960K 7203 0 UVM aobj 13 2K 2K 166960K 13 0 pinsyscall 19 38K 98K 166960K 1730 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 43 0 NDP 13 0K 2K 166960K 39 0 temp 52 9114K 9186K 166960K 23702 0 kqueue 2 4K 30K 166960K 104 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 120 145 0 145 3 0 3 3 0 8 3 rtentry 136 131 0 37 5 0 5 5 0 8 0 unpcb 144 264 0 262 1 0 1 1 0 8 0 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 214 0 210 4 0 4 4 0 8 3 arp 96 20 0 6 1 0 1 1 0 8 0 ipq 40 4 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 0 1 0 1 1 0 8 0 inpcb 328 657 0 650 10 1 9 10 0 8 7 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 2 1 0 1 1 0 8 0 nd6 112 32 0 10 1 0 1 1 0 8 0 pkpcb 40 3 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 9 0 9 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfstkey 128 2 0 2 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1360 3 0 3 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 497 0 105 31 0 31 31 0 8 3 art_table 40 500 0 105 5 0 5 5 0 8 0 art_node 32 129 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 0 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 72 60 0 45 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2452 0 996 92 0 92 92 0 8 0 ffsino 256 2452 0 996 92 0 92 92 0 8 0 nchpl 144 3379 0 1680 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2689 0 0 150 0 150 150 0 8 0 namei 1024 10999 0 10999 2 0 2 2 0 8 2 kstatmem 264 45 0 18 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 17723 0 17723 8 0 8 8 1 8 8 plimitpl 152 156 0 147 1 0 1 1 0 8 0 sigapl 424 943 0 910 8 0 8 8 0 8 3 knotepl 120 20985 0 20759 23 13 10 17 0 8 3 kqueuepl 184 178 0 174 2 0 2 2 0 8 1 pipepl 304 149 0 122 3 0 3 3 0 8 0 fdescpl 448 909 0 889 5 0 5 5 0 8 1 filepl 120 4929 0 4760 11 0 11 11 0 8 3 lockfpl 104 183 0 177 1 0 1 1 0 8 0 lockfspl 48 81 0 78 1 0 1 1 0 8 0 sessionpl 144 53 0 51 1 0 1 1 0 8 0 pgrppl 48 66 0 56 1 0 1 1 0 8 0 ucredpl 104 892 0 886 1 0 1 1 0 8 0 zombiepl 144 911 0 910 1 0 1 1 0 8 0 processpl 1152 943 0 910 5 0 5 5 0 8 1 procpl 664 1652 0 1609 7 0 7 7 0 8 3 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 552 1084 0 1074 10 0 10 10 0 8 8 mcl64k 65536 44 0 42 1 0 1 1 0 8 0 mcl16k 16384 17 0 17 1 0 1 1 0 8 1 mcl12k 12288 5 0 5 1 0 1 1 0 8 1 mcl9k128 9344 8 0 8 1 0 1 1 0 8 1 mcl8k 8192 56 0 56 1 0 1 1 0 8 1 mcl4k 4096 3258 0 3207 14 0 14 14 0 8 7 mcl2k 2048 497 0 495 3 0 3 3 0 8 2 mtagpl 96 71 0 5 2 0 2 2 0 8 0 mbufpl 256 9926 0 9523 34 0 34 34 0 8 5 bufpl 272 6773 0 557 415 0 415 415 0 8 0 anonpl 24 150843 0 147189 59 0 59 59 0 187 33 amapchunkpl 152 23291 0 22782 28 0 28 28 0 158 8 amappl16 200 2825 0 2800 22 8 14 22 0 8 8 amappl15 192 6 0 6 1 0 1 1 0 8 1 amappl14 184 409 0 409 1 0 1 1 0 8 1 amappl13 176 130 0 129 1 0 1 1 0 8 0 amappl12 168 1143 0 1125 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 67 0 67 1 0 1 1 0 8 1 amappl9 144 272 0 272 1 0 1 1 0 8 1 amappl8 136 105 0 105 1 0 1 1 0 8 1 amappl7 128 144 0 142 1 0 1 1 0 8 0 amappl6 120 151 0 150 1 0 1 1 0 8 0 amappl5 112 91 0 91 1 0 1 1 0 8 1 amappl4 104 260 0 258 1 0 1 1 0 8 0 amappl3 96 4586 0 4502 4 0 4 4 0 8 0 amappl2 88 531 0 522 2 0 2 2 0 8 0 amappl1 80 12085 0 11988 13 0 13 13 0 8 7 amappl 88 6423 0 6295 5 0 5 5 0 92 1 uvmvnodes 80 110 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 909 0 889 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 909 0 889 1 0 1 1 0 8 0 vmmpekpl 168 8678 0 8647 2 0 2 2 0 8 0 vmmpepl 168 64686 0 63813 98 0 98 98 0 357 53 vmsppl 368 908 0 889 4 0 4 4 0 8 1 rwobjpl 40 19846 0 19432 14 0 14 14 0 8 1 pdppl 4096 1824 0 1778 98 52 46 82 0 8 0 pvpl 32 416012 0 409154 129 0 129 129 0 265 69 pmappl 216 908 0 889 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 808 0 52 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff80002a79d690) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83944aa0,ffff80002a7360a0) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a7360a0,0) 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 writedisklabel(d02,ffffffff81e2efd0,ffff800000039000) at writedisklabel+0x1b5 sys/arch/amd64/amd64/disksubr.c:158 sdioctl(d01,84946467,ffff800001584800,3,ffff80002a7379f8) at sdioctl+0x90a sys/scsi/sd.c:913 VOP_IOCTL(fffff400702a56f0,84946467,ffff800001584800,3,fffff40007ffd6e8,ffff80002a7379f8) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffff4007c544448,84946467,ffff800001584800,ffff80002a7379f8) at vn_ioctl+0xea sys/kern/vfs_vnops.c:537 sys_ioctl(ffff80002a7379f8,ffff80002ccab330,ffff80002ccab280) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccab330) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccab330) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd490e685ff0, count: -14 ddb>