uvm_fault(0xffffffff83617818, 0xffff800029fe6000, 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 *467814 65817 0 0 0x4000000 0 syz-executor kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660 softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719 softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161 sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915 VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbb32811b570, count: 2 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(0xffffffff83617818, 0xffff800029fe6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660 softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719 softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161 sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915 VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbb32811b570, count: -13 ddb> show registers rdi 0xffffffff rsi 0xffff800000b10c00 rbp 0xffff80002a9c6d70 rbx 0x7fff05dc rdx 0xffff800039ddacd0 rcx 0xffff800029fe6000 rax 0xfffffd806c1dfe10 r8 0 r9 0x201 r10 0xffff80002a9c6df0 r11 0xfdfe74bd04c9b58d r12 0xffff80002a87cf68 r13 0xffffffff8349aff0 cpu_info_full_primary+0x1ff0 r14 0xffff8000ffff88b8 r15 0 rip 0xffffffff8150c092 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a9c6d50 ss 0x10 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=467814 pid=65817 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039dda028,0xffffffff8362d140 process=0xffff80002a872f80 user=0xffff80002a9c2000, vmspace=0xfffffd806c04fcc0 estcpu=36, cpticks=20, pctcpu=0.0, user=0, sys=0, intr=20 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 65817 64962 23513 0 2 0 syz-executor *65817 467814 23513 0 7 0x4000000 syz-executor 65976 43832 94829 0 2 0x2 ndp 94829 123228 82471 0 3 0x10008a sigsusp sh 62792 264645 8973 0 3 0x80 nanoslp syz-executor 62792 107841 8973 0 3 0x4000080 netcon syz-executor 62792 401875 8973 0 3 0x4000080 fsleep syz-executor 69143 338906 33592 0 3 0x80 nanoslp syz-executor 69143 44161 33592 0 3 0x4000080 ttyin syz-executor 69143 495386 33592 0 3 0x4000080 fsleep syz-executor 69143 85592 33592 0 3 0x4000080 fsleep syz-executor 82471 192494 75027 0 3 0x82 wait syz-executor 33592 385726 75027 0 3 0x82 nanoslp syz-executor 4549 359594 75027 0 3 0x82 wait syz-executor 22280 128950 75027 0 2 0x2 syz-executor 23513 253413 75027 0 3 0x82 nanoslp syz-executor 84725 376449 75027 0 3 0x82 piperd syz-executor 8973 256732 75027 0 3 0x82 nanoslp syz-executor 77033 102127 0 0 3 0x14280 nfsidl nfsio 22881 516942 0 0 3 0x14280 nfsidl nfsio 52527 63082 0 0 3 0x14280 nfsidl nfsio 28982 36437 0 0 3 0x14280 nfsidl nfsio 86743 456659 0 0 3 0x14280 nfsidl nfsio 79679 120241 0 0 3 0x14280 nfsidl nfsio 94190 507291 0 0 3 0x14280 nfsidl nfsio 95353 436917 0 0 3 0x14280 nfsidl nfsio 44686 302530 0 0 3 0x14280 nfsidl nfsio 81942 479211 0 0 3 0x14280 nfsidl nfsio 53589 497035 0 0 3 0x14280 nfsidl nfsio 54199 377177 0 0 3 0x14280 nfsidl nfsio 94833 207443 0 0 3 0x14280 nfsidl nfsio 34706 465627 0 0 3 0x14280 nfsidl nfsio 97253 104373 0 0 3 0x14280 nfsidl nfsio 99674 237915 0 0 3 0x14280 nfsidl nfsio 53319 16471 0 0 3 0x14280 nfsidl nfsio 79112 255918 0 0 3 0x14280 nfsidl nfsio 15333 271927 0 0 3 0x14280 nfsidl nfsio 9881 203077 0 0 3 0x14280 nfsidl nfsio 72123 269997 1 0 3 0x100083 ttyin getty 30634 213006 0 0 3 0x14200 bored sosplice 66840 422610 75027 0 3 0x82 wait syz-executor 75027 352946 13620 0 2 0x2 syz-executor 13620 473559 37088 0 3 0x10008a sigsusp ksh 37088 117545 34619 0 3 0x98 kqread sshd-session 34619 184224 88505 0 3 0x92 kqread sshd-session 88505 498699 1 0 3 0x88 kqread sshd 70744 357907 27747 73 3 0x1100090 kqread syslogd 27747 262900 1 0 3 0x100082 sbwait syslogd 33672 372146 1 0 3 0x100080 kqread resolvd 83639 246264 60277 77 3 0x100092 kqread dhcpleased 85386 63062 60277 77 3 0x100092 kqread dhcpleased 60277 63260 1 0 3 0x80 kqread dhcpleased 31309 326611 0 0 3 0x14200 bored smr 47582 84732 0 0 2 0x14200 zerothread 3254 18838 0 0 3 0x14200 aiodoned aiodoned 2747 8970 0 0 3 0x14200 syncer update 76511 263811 0 0 3 0x14200 cleaner cleaner 27094 395857 0 0 3 0x14200 reaper reaper 31136 155106 0 0 3 0x14200 pgdaemon pagedaemon 70452 462591 0 0 3 0x14200 bored viomb 23705 43513 0 0 3 0x40014200 acpi0 acpi0 27004 1514 0 0 3 0x14200 bored softnet3 24345 371476 0 0 3 0x14200 bored softnet2 69540 90038 0 0 3 0x14200 bored softnet1 20668 132980 0 0 3 0x14200 bored softnet0 940 193357 0 0 3 0x14200 bored systqmp 45141 321979 0 0 3 0x14200 bored systq 50014 336064 0 0 3 0x40014200 tmoslp softclock 30052 428706 0 0 3 0x40014200 idle0 1 261652 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 10239 11270K 11576K 166960K 18824 0 pcb 17 18K 20K 166960K 822 0 rtable 227 11K 11K 166960K 1281 0 pf 40 15K 23K 166960K 382 0 ifaddr 38 6K 8K 166960K 147 0 ifgroup 53 2K 2K 166960K 174 0 sysctl 4 1K 1K 166960K 8 0 counters 31 17K 17K 166960K 69 0 ioctlops 1 0K 4K 166960K 556 0 iov 0 0K 32K 166960K 491 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1459 92K 92K 166960K 5211 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 79 0 VM map 2 1K 1K 166960K 2 0 sem 15 68K 68K 166960K 292 0 dirhash 12 2K 3K 166960K 60 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 3720 0 sigio 0 0K 0K 166960K 294 0 proc 60 59K 108K 166960K 1216 0 subproc 72 4K 4K 166960K 189 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 1049 0 in_multi 80 6K 7K 166960K 408 0 ether_multi 1 0K 0K 166960K 27 0 mrt 2 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1339 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 35 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 207 72K 90K 166960K 34949 0 UVM aobj 157 7K 7K 166960K 162 0 pinsyscall 38 76K 94K 166960K 5103 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 285 0 NDP 14 0K 2K 166960K 106 0 temp 76 6892K 7020K 166960K 105574 0 kqueue 13 20K 32K 166960K 620 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 120 792 0 789 8 5 3 5 0 8 2 rtentry 112 359 0 263 4 0 4 4 0 8 0 unpcb 144 3858 0 3842 11 3 8 8 0 8 7 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 808 1193 0 1188 18 10 8 8 0 8 7 arp 88 71 0 44 1 0 1 1 0 8 0 ipq 40 12 0 10 1 0 1 1 0 8 0 ipqe 40 154 0 151 1 0 1 1 0 8 0 inpcb 344 4590 0 4578 45 36 9 17 0 8 7 nd6 104 81 0 62 1 0 1 1 0 8 0 pkpcb 40 26 0 26 3 2 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 ppxss 1072 18 0 17 2 1 1 1 0 8 0 pfstscr 40 10 0 7 1 0 1 1 0 8 0 pfrktable 1344 19 0 16 2 1 1 1 0 8 0 pfanchor 1288 9 0 3 1 0 1 1 0 8 0 pftag 88 8 0 5 1 0 1 1 0 8 0 pfqueue 320 5 0 2 1 0 1 1 0 8 0 pfstitem 24 18 0 6 1 0 1 1 0 8 0 pfstkey 128 44 0 30 1 0 1 1 0 8 0 pfstate 344 23 0 17 1 0 1 1 0 8 0 pfrule 1344 74 0 67 2 1 1 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1419 0 1035 35 9 26 29 0 8 2 art_table 32 1424 0 1035 4 0 4 4 0 8 0 art_node 16 350 0 267 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 12 1 0 1 1 0 8 0 semapl 112 287 0 274 1 0 1 1 0 8 0 shmpl 112 159 0 5 5 0 5 5 0 8 0 dirhash 1024 50 0 33 3 0 3 3 0 8 0 dino2pl 256 8134 0 6605 96 0 96 96 0 8 0 ffsino 248 8134 0 6605 96 0 96 96 0 8 0 nchpl 144 13438 0 12868 64 33 31 64 0 8 8 uvmvnodes 80 8976 0 0 184 0 184 184 0 8 0 vnodes 216 8976 0 0 499 0 499 499 0 8 0 namei 1024 51268 0 51267 5 4 1 2 0 8 0 pfiaddrpl 120 4 0 2 2 1 1 1 0 8 0 kstatmem 264 100 0 76 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 20 0 20 3 2 1 1 0 8 1 scxspl 216 40436 0 40436 17 9 8 8 1 8 8 plimitpl 152 1474 0 1457 1 0 1 1 0 8 0 sigapl 424 4003 0 3937 8 0 8 8 0 8 0 futexpl 64 57143 0 57140 1 0 1 1 0 8 0 knotepl 120 138817 0 138769 53 40 13 17 0 8 8 kqueuepl 184 1187 0 1178 7 3 4 4 0 8 3 pipepl 296 1017 0 989 13 5 8 8 0 8 4 fdescpl 440 3961 0 3932 5 1 4 5 0 8 0 filepl 120 32242 0 32020 37 20 17 17 0 8 6 lockfpl 104 1343 0 1341 2 0 2 2 0 8 1 lockfspl 48 395 0 393 1 0 1 1 0 8 0 sessionpl 144 37 0 29 1 0 1 1 0 8 0 pgrppl 48 233 0 216 1 0 1 1 0 8 0 ucredpl 104 5936 0 5924 1 0 1 1 0 8 0 zombiepl 144 3939 0 3937 2 1 1 1 0 8 0 processpl 1104 4003 0 3937 5 0 5 5 0 8 0 procpl 648 9213 0 9141 8 0 8 8 0 8 0 sosppl 168 17 0 17 4 3 1 1 0 8 1 sockpl 528 9391 0 9363 55 45 10 23 0 8 7 mcl64k 65536 85 0 84 3 2 1 1 0 8 0 mcl16k 16384 5 0 5 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 109 0 109 3 2 1 1 0 8 1 mcl4k 4096 7237 0 7185 16 8 8 13 0 8 0 mcl2k 2048 4406 0 4396 5 2 3 3 0 8 1 mtagpl 96 319 0 207 3 0 3 3 0 8 0 mbufpl 256 50303 0 50026 376 350 26 286 0 8 5 bufpl 280 12291 0 6052 446 0 446 446 0 8 0 anonpl 24 515882 0 512381 104 45 59 59 0 187 23 amapchunkpl 152 120414 0 119957 58 26 32 36 0 158 11 amappl16 200 11005 0 10970 81 67 14 16 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 141 0 131 1 0 1 1 0 8 0 amappl13 176 11 0 11 2 1 1 1 0 8 1 amappl12 168 4781 0 4752 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 12 0 11 1 0 1 1 0 8 0 amappl9 144 239 0 238 2 1 1 1 0 8 0 amappl8 136 30 0 28 1 0 1 1 0 8 0 amappl7 128 142 0 131 1 0 1 1 0 8 0 amappl6 120 315 0 310 1 0 1 1 0 8 0 amappl5 112 175 0 168 1 0 1 1 0 8 0 amappl4 104 363 0 348 1 0 1 1 0 8 0 amappl3 96 24259 0 24159 4 0 4 4 0 8 0 amappl2 88 864 0 803 2 0 2 2 0 8 0 amappl1 80 19665 0 19144 13 1 12 13 0 8 0 amappl 88 34193 0 34036 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma4096 4096 2 0 2 2 1 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 9 0 9 3 2 1 1 0 8 1 dma128 128 259 0 259 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 161 0 5 3 0 3 3 0 8 0 uaddrrnd 24 3961 0 3932 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3961 0 3932 1 0 1 1 0 8 0 vmmpekpl 168 28206 0 28149 3 0 3 3 0 8 0 vmmpepl 168 239538 0 237841 114 24 90 90 0 357 6 vmsppl 360 3960 0 3932 4 1 3 4 0 8 0 rwobjpl 32 67047 0 57048 83 2 81 81 0 8 0 pdppl 4096 7928 0 7864 148 80 68 82 0 8 4 pvpl 32 1584610 0 1575993 208 79 129 137 0 265 29 pmappl 216 3960 0 3932 3 0 3 3 0 8 1 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 723 0 472 16 7 9 15 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660 softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719 softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161 sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915 VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbb32811b570, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff8000ffff88b8) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffff80002a87d010) at timeout_run+0xac sys/kern/kern_timeout.c:660 softclock_process_tick_timeout(ffff80002a87d010,0) at softclock_process_tick_timeout+0x222 sys/kern/kern_timeout.c:719 softclock(0) at softclock+0x16b sys/kern/kern_timeout.c:751 softintr_dispatch(0) at softintr_dispatch+0xea sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 writedisklabel(d02,ffffffff81e66ce0,ffff800000025c00) at writedisklabel+0x1ba sys/arch/amd64/amd64/disksubr.c:161 sdioctl(d02,81946467,ffff8000012fa000,2,ffff800039ddacd0) at sdioctl+0x903 sys/scsi/sd.c:915 VOP_IOCTL(fffffd80641582a8,81946467,ffff8000012fa000,2,fffffd807f7d7750,ffff800039ddacd0) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806bb89f18,81946467,ffff8000012fa000,ffff800039ddacd0) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800039ddacd0,ffff80002a9c73c0,ffff80002a9c7310) at sys_ioctl+0x5bf syscall(ffff80002a9c73c0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbb32811b570, count: -13