uvm_fault(0xffffffff839ee618, 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 * 20936 68154 0 0 0 0 syz-executor kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83905f20,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) 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: 0x72c52cbec430, 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(0xffffffff839ee618, 0xffff800029ee6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff83905f20,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) 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: 0x72c52cbec430, count: -7 ddb> show registers rdi 0xffffffff rsi 0xffff800000c16c00 rbp 0xffff80002f0c2fb0 rbx 0xffff80002a79c910 rdx 0xffff80002f0b02b0 rcx 0xffff800029ee6000 rax 0xfffff4006caceea0 r8 0 r9 0 r10 0x36e37b4436bea568 r11 0x8b793ca5f67807eb r12 0xffffffff8105f440 endtsleep r13 0xffff80002a737c90 r14 0xffff80002a79c910 r15 0 rip 0xffffffff82fbeab2 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002f0c2f90 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=20936 pid=68154 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=0xffff80002f0b0d10,0xffff80002f0b14e8 process=0xffff8000ffffb618 user=0xffff80002f0be000, vmspace=0xfffff4006c9e7018 estcpu=36, cpticks=5, pctcpu=0.0, user=4, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 80615 229461 47190 0 2 0 syz-executor 80615 282931 47190 0 3 0x4000080 fsleep syz-executor 84851 321395 63093 0 2 0 syz-executor 84851 139889 63093 0 3 0x4000080 fsleep syz-executor 81287 170584 13880 0 3 0x80 nanoslp syz-executor 81287 163635 13880 0 3 0x4000080 kqread syz-executor 81287 86440 13880 0 3 0x4000080 fsleep syz-executor *68154 20936 92881 0 7 0 syz-executor 68154 302544 92881 0 2 0x4000000 syz-executor 68154 358936 92881 0 3 0x4000080 fsleep syz-executor 23501 177860 0 0 3 0x14200 acct acct 90922 357533 97322 60929 3 0x90 nanoslp syz-executor 90922 95160 97322 60929 3 0x4000090 kqsel syz-executor 90922 86487 97322 60929 3 0x4000090 fsleep syz-executor 22137 260588 64911 0 3 0x80 nanoslp syz-executor 22137 146984 64911 0 3 0x4000080 lockf syz-executor 22137 449893 64911 0 3 0x4000080 fsleep syz-executor 22137 107061 64911 0 3 0x4000080 fsleep syz-executor 47190 280738 31485 0 3 0x82 nanoslp syz-executor 31690 17117 1 0 3 0x80 nanoslp init 64911 332877 31485 0 3 0x82 nanoslp syz-executor 13880 52454 31485 0 3 0x82 nanoslp syz-executor 63093 335925 31485 0 3 0x82 nanoslp syz-executor 92881 194155 31485 0 3 0x82 nanoslp syz-executor 62767 391279 31485 0 3 0x82 nanoslp syz-executor 97322 178329 31485 0 3 0x82 nanoslp syz-executor 31485 322673 1 0 3 0x82 wait syz-executor 11758 253393 0 0 3 0x14200 bored smr 30047 505441 0 0 2 0x14200 zerothread 59590 2219 0 0 3 0x14200 aiodoned aiodoned 15133 166268 0 0 3 0x14200 syncer update 45050 148 0 0 3 0x14200 cleaner cleaner 84885 43423 0 0 3 0x14200 reaper reaper 2907 445636 0 0 3 0x14200 pgdaemon pagedaemon 14849 20422 0 0 3 0x14200 bored viomb 68228 136133 0 0 3 0x40014200 acpi0 acpi0 8795 153889 0 0 3 0x14200 bored softnet0 71471 349958 0 0 3 0x14200 bored systqmp 70372 406380 0 0 3 0x14200 bored systq 37206 224941 0 0 3 0x40014200 tmoslp softclock 96149 353139 0 0 3 0x40014200 idle0 1 482120 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 11019 12102K 12477K 166960K 12581 0 pcb 17 14K 16K 166960K 150 0 rtable 194 7K 9K 166960K 472 0 pf 27 12K 19K 166960K 118 0 ifaddr 30 5K 7K 166960K 65 0 ifgroup 38 1K 2K 166960K 86 0 sysctl 3 1K 9K 166960K 10 0 counters 30 17K 18K 166960K 52 0 ioctlops 0 0K 4K 166960K 170 0 iov 0 0K 12K 166960K 39 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1327 83K 84K 166960K 1831 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 158 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 61K 97K 166960K 600 0 sigio 0 0K 0K 166960K 10 0 proc 11 17K 108K 166960K 594 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 50 0 in_multi 66 4K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 431 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 139 83K 160K 166960K 6773 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 18 36K 95K 166960K 1767 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 25 0 NDP 10 0K 2K 166960K 44 0 temp 45 9108K 9178K 166960K 14050 0 kqueue 2 4K 32K 166960K 123 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 120 132 0 132 3 0 3 3 0 8 3 rtentry 136 136 0 57 4 0 4 4 0 8 0 unpcb 144 513 0 512 5 0 5 5 0 8 4 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 228 0 226 7 0 7 7 0 8 6 arp 96 22 0 10 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 4 0 2 1 0 1 1 0 8 0 inpcb 328 562 0 559 7 0 7 7 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 5 0 2 1 0 1 1 0 8 0 nd6 112 30 0 15 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 15 0 15 1 0 1 1 0 8 1 pfstscr 40 8 0 4 1 0 1 1 0 8 0 pfrktable 1344 5 0 5 1 0 1 1 0 8 1 pfanchor 1288 4 0 2 1 0 1 1 0 8 0 pftag 88 5 0 3 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 8 0 8 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 605 0 251 30 0 30 30 0 8 6 art_table 40 607 0 251 5 0 5 5 0 8 0 art_node 32 136 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 155 0 145 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2411 0 946 92 0 92 92 0 8 0 ffsino 256 2411 0 946 92 0 92 92 0 8 0 nchpl 144 3256 0 1549 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 2763 0 0 154 0 154 154 0 8 0 namei 1024 10212 0 10212 2 0 2 2 0 8 2 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 49 0 32 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 216 16183 0 16183 8 0 8 8 1 8 8 plimitpl 152 77 0 67 1 0 1 1 0 8 0 sigapl 424 898 0 865 6 0 6 6 0 8 1 knotepl 120 28729 0 28710 23 13 10 22 0 8 8 kqueuepl 184 223 0 219 2 0 2 2 0 8 1 pipepl 304 147 0 120 3 0 3 3 0 8 0 fdescpl 448 883 0 864 5 0 5 5 0 8 1 filepl 120 4806 0 4638 12 0 12 12 0 8 2 lockfpl 104 283 0 280 1 0 1 1 0 8 0 lockfspl 48 111 0 109 1 0 1 1 0 8 0 sessionpl 144 38 0 36 1 0 1 1 0 8 0 pgrppl 48 84 0 74 1 0 1 1 0 8 0 ucredpl 104 756 0 751 1 0 1 1 0 8 0 zombiepl 144 867 0 865 1 0 1 1 0 8 0 processpl 1152 898 0 865 4 0 4 4 0 8 0 procpl 664 1504 0 1460 6 0 6 6 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 1228 0 1224 11 0 11 11 0 8 10 mcl64k 65536 91 0 89 1 0 1 1 0 8 0 mcl16k 16384 10 0 10 1 0 1 1 0 8 1 mcl9k128 9344 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 21 0 21 1 0 1 1 0 8 1 mcl4k 4096 3166 0 3111 14 0 14 14 0 8 6 mcl2k2 2112 5 0 5 1 0 1 1 0 8 1 mcl2k 2048 480 0 476 3 0 3 3 0 8 2 mtagpl 96 5 0 5 1 0 1 1 0 8 1 mbufpl 256 8781 0 8661 16 0 16 16 0 8 3 bufpl 280 6737 0 521 445 0 445 445 0 8 0 anonpl 24 148188 0 145572 63 0 63 63 0 186 30 amapchunkpl 152 21133 0 20696 27 0 27 27 0 158 8 amappl16 200 2906 0 2886 21 7 14 21 0 8 8 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 436 0 436 1 0 1 1 0 8 1 amappl13 176 123 0 123 1 0 1 1 0 8 1 amappl12 168 1127 0 1110 2 0 2 2 0 8 0 amappl11 160 5 0 4 1 0 1 1 0 8 0 amappl10 152 60 0 60 1 0 1 1 0 8 1 amappl9 144 267 0 267 1 0 1 1 0 8 1 amappl8 136 117 0 117 1 0 1 1 0 8 1 amappl7 128 149 0 146 1 0 1 1 0 8 0 amappl6 120 173 0 172 1 0 1 1 0 8 0 amappl5 112 94 0 93 1 0 1 1 0 8 0 amappl4 104 271 0 269 1 0 1 1 0 8 0 amappl3 96 4367 0 4287 3 0 3 3 0 8 0 amappl2 88 551 0 542 2 0 2 2 0 8 0 amappl1 80 12199 0 12106 13 1 12 13 0 8 8 amappl 88 5930 0 5803 4 0 4 4 0 92 0 uvmvnodes 80 112 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma2048 2048 3 0 3 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 883 0 864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 883 0 864 1 0 1 1 0 8 0 vmmpekpl 168 8341 0 8301 3 0 3 3 0 8 0 vmmpepl 168 63820 0 63003 96 0 96 96 0 357 56 vmsppl 368 882 0 864 4 0 4 4 0 8 1 rwobjpl 40 19898 0 19492 14 0 14 14 0 8 1 pdppl 4096 1772 0 1728 102 54 48 82 0 8 4 pvpl 32 415279 0 408978 131 0 131 131 0 265 68 pmappl 216 882 0 864 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 381 0 54 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb>