uvm_fault(0xffffffff82e5e8b0, 0xffff80002a186000, 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 *373336 50281 0 0x8000000 0 0 syz-executor.4 kcov_remote_enter(0,ffff8000fffe9d70) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a678b08) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a678b08,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d2d49688650, count: 9 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(0xffffffff82e5e8b0, 0xffff80002a186000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff8000fffe9d70) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a678b08) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a678b08,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d2d49688650, count: -6 ddb> show registers rdi 0xffffffff rsi 0xffff8000006a8a00 rbp 0xffff80003438f290 rbx 0x7ffecaea rdx 0xffff80002a678540 rcx 0xffff80002a186000 rax 0xfffffd806c6f5e10 r8 0 r9 0 r10 0xa2ad17f68925bbe1 r11 0xd0596192e953362c r12 0xffff80002a678a60 r13 0xffffffff82cb6ff0 cpu_info_full_primary+0x1ff0 r14 0xffff8000fffe9d70 r15 0 rip 0xffffffff824ad1e2 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80003438f270 ss 0 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor.4) tid=373336 pid=50281 tcnt=2 stat=onproc flags process=8000000 proc=0 runpri=82, usrpri=83, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a6794a0,0xffff80002a678030 process=0xffff8000fffe9510 user=0xffff80003438a000, vmspace=0xfffffd80697856c8 estcpu=33, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 54368 202245 93382 0 2 0x8000000 syz-executor.3 54368 28407 93382 0 3 0xc000080 fsleep syz-executor.3 91981 128964 49855 0 2 0x8000000 syz-executor.5 91981 239787 49855 0 2 0xc000000 syz-executor.5 *50281 373336 43710 0 7 0x8000000 syz-executor.4 50281 131863 43710 0 3 0xc000080 netcon syz-executor.4 96273 251251 66979 0 3 0x8000080 nanoslp syz-executor.7 96273 5874 66979 0 3 0xc000080 sbwait syz-executor.7 96273 41491 66979 0 2 0xc000000 syz-executor.7 96273 491700 66979 0 3 0xc000080 fsleep syz-executor.7 43710 472144 34828 0 3 0x8000082 nanoslp syz-executor.4 45729 410383 34828 0 3 0x8000082 nanoslp syz-executor.1 93382 445645 34828 0 3 0x8000082 nanoslp syz-executor.3 10369 359510 34828 0 3 0x8000082 nanoslp syz-executor.6 66979 246658 34828 0 3 0x8000082 nanoslp syz-executor.7 23157 490167 34828 0 3 0x8000082 nanoslp syz-executor.0 39691 322788 0 0 3 0x14200 bored sosplice 49855 400341 34828 0 3 0x8000082 nanoslp syz-executor.5 65670 516866 34828 0 3 0x8000082 nanoslp syz-executor.2 34828 395312 31911 0 3 0x1a000082 wait syz-fuzzer 34828 164219 31911 0 3 0x1e000082 thrsleep syz-fuzzer 34828 160866 31911 0 3 0x1e000082 wait syz-fuzzer 34828 366536 31911 0 3 0x1e000082 thrsleep syz-fuzzer 34828 326155 31911 0 3 0x1e000082 wait syz-fuzzer 34828 279601 31911 0 3 0x1e000082 thrsleep syz-fuzzer 34828 112458 31911 0 3 0x1e000082 thrsleep syz-fuzzer 34828 199403 31911 0 3 0x1e000082 wait syz-fuzzer 34828 385647 31911 0 3 0x1e000082 wait syz-fuzzer 34828 453751 31911 0 3 0x1e000082 wait syz-fuzzer 34828 346062 31911 0 3 0x1e000082 thrsleep syz-fuzzer 34828 168847 31911 0 3 0x1e000082 wait syz-fuzzer 34828 68221 31911 0 3 0x1e000082 kqread syz-fuzzer 34828 2707 31911 0 3 0x1e000082 wait syz-fuzzer 31911 196777 5582 0 3 0x810008a sigsusp ksh 5582 377858 98757 0 3 0x1800009a kqread sshd 16647 477856 1 0 3 0x18100083 ttyin getty 98757 196975 1 0 3 0x18000088 kqread sshd 44989 305124 29989 73 2 0x19100090 syslogd 29989 447813 1 0 3 0x18100082 sbwait syslogd 6616 480254 1 0 3 0x18100080 kqread resolvd 64293 80754 96035 77 3 0x18100092 kqread dhcpleased 99563 478295 96035 77 3 0x18100092 kqread dhcpleased 96035 30354 1 0 3 0x18000080 kqread dhcpleased 57958 91823 0 0 3 0x14200 bored smr 66201 163843 0 0 2 0x14200 zerothread 50036 396889 0 0 3 0x14200 aiodoned aiodoned 45185 426362 0 0 3 0x14200 syncer update 62390 107464 0 0 3 0x14200 cleaner cleaner 83745 228586 0 0 3 0x14200 reaper reaper 83668 466037 0 0 3 0x14200 pgdaemon pagedaemon 74232 6749 0 0 3 0x14200 bored viomb 42847 516765 0 0 3 0x40014200 acpi0 acpi0 86990 464035 0 0 3 0x14200 bored softnet3 74531 207309 0 0 3 0x14200 bored softnet2 20475 79398 0 0 3 0x14200 bored softnet1 11713 130862 0 0 3 0x14200 bored softnet0 72717 332403 0 0 3 0x14200 bored systqmp 66668 413658 0 0 3 0x14200 bored systq 88185 142510 0 0 3 0x40014200 tmoslp softclock 76983 444038 0 0 3 0x40014200 idle0 1 314351 0 0 3 0x8000082 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 10194 6610K 6934K 166960K 13329 0 pcb 15 10K 10K 166960K 122 0 rtable 188 7K 8K 166960K 831 0 pf 27 8K 9K 166960K 91 0 ifaddr 34 9K 11K 166960K 107 0 ifgroup 44 1K 2K 166960K 146 0 sysctl 3 0K 0K 166960K 3 0 counters 29 17K 17K 166960K 58 0 ioctlops 0 0K 2K 166960K 139 0 iov 0 0K 24K 166960K 107 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1427 90K 90K 166960K 2397 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 32 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 52 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 14 49K 73K 166960K 1437 0 sigio 0 0K 0K 166960K 21 0 proc 59 59K 83K 166960K 870 0 subproc 104 6K 6K 166960K 235 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 198 0 in_multi 67 5K 7K 166960K 254 0 ether_multi 1 0K 0K 166960K 5 0 mrt 1 0K 0K 166960K 4 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 616 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 324 167K 168K 166960K 14395 0 UVM aobj 83 7K 7K 166960K 89 0 pinsyscall 34 68K 100K 166960K 2831 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 86 0 NDP 10 0K 1K 166960K 75 0 temp 74 6804K 6880K 166960K 13751 0 kqueue 12 18K 24K 166960K 159 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 120 136 0 133 1 0 1 1 0 8 0 rtentry 112 241 0 157 4 0 4 4 0 8 1 unpcb 144 852 0 832 2 0 2 2 0 8 1 syncache 336 22 0 22 1 0 1 1 0 8 1 tcpqe 32 122 0 122 1 0 1 1 0 8 1 tcpcb 808 483 0 460 8 0 8 8 0 8 5 arp 88 42 0 27 1 0 1 1 0 8 0 inpcb 360 1287 0 1260 9 0 9 9 0 8 5 nd6 104 60 0 43 1 0 1 1 0 8 0 pkpcb 40 17 0 17 1 0 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1072 11 0 10 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 919 0 581 30 6 24 29 0 8 1 art_table 32 920 0 581 4 0 4 4 0 8 0 art_node 16 235 0 158 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 12 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 86 0 6 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3540 0 2029 96 0 96 96 0 8 0 ffsino 240 3540 0 2029 90 0 90 90 0 8 0 nchpl 144 5606 0 3867 66 0 66 66 0 8 0 uvmvnodes 80 4397 0 0 90 0 90 90 0 8 0 vnodes 216 4397 0 0 245 0 245 245 0 8 0 namei 1024 18890 0 18890 3 0 3 3 0 8 3 vcpupl 2048 16 0 1 2 0 2 2 0 8 0 vmpool 664 25 0 10 2 0 2 2 0 8 0 kstatmem 264 78 0 58 2 0 2 2 0 8 0 scxspl 216 17657 0 17657 8 0 8 8 1 8 8 plimitpl 152 164 0 147 1 0 1 1 0 8 0 sigapl 424 1736 0 1690 8 0 8 8 0 8 2 futexpl 64 21630 0 21628 1 0 1 1 0 8 0 knotepl 120 14765 0 14683 11 0 11 11 0 8 8 kqueuepl 184 268 0 259 1 0 1 1 0 8 0 pipepl 288 293 0 265 3 0 3 3 0 8 0 fdescpl 432 1698 0 1673 4 0 4 4 0 8 0 filepl 120 9410 0 9149 11 0 11 11 0 8 2 lockfpl 104 448 0 444 1 0 1 1 0 8 0 lockfspl 48 185 0 181 1 0 1 1 0 8 0 sessionpl 144 33 0 17 1 0 1 1 0 8 0 pgrppl 48 48 0 32 1 0 1 1 0 8 0 ucredpl 104 1357 0 1343 1 0 1 1 0 8 0 zombiepl 144 1694 0 1690 1 0 1 1 0 8 0 processpl 1072 1736 0 1690 5 0 5 5 0 8 1 procpl 656 3198 0 3133 8 0 8 8 0 8 1 sosppl 168 25 0 23 1 0 1 1 0 8 0 sockpl 488 2305 0 2256 15 0 15 15 0 8 7 mcl64k 65536 63 0 63 1 0 1 1 0 8 1 mcl16k 16384 59 0 59 1 0 1 1 0 8 1 mcl12k 12288 72 0 72 1 0 1 1 0 8 1 mcl9k 9216 11 0 11 1 0 1 1 0 8 1 mcl8k 8192 101 0 101 1 0 1 1 0 8 1 mcl4k 4096 221 0 221 1 0 1 1 0 8 1 mcl2k2 2112 14 0 14 1 0 1 1 0 8 1 mcl2k 2048 26200 0 26154 30 16 14 28 0 8 7 mtagpl 96 170 0 70 3 0 3 3 0 8 0 mbufpl 256 60208 0 59936 32 10 22 27 0 8 3 bufpl 280 6621 0 292 453 0 453 453 0 8 0 anonpl 24 332579 0 326849 71 0 71 71 0 188 28 amapchunkpl 152 46867 0 46245 37 0 37 37 0 158 7 amappl16 200 8345 0 8237 37 22 15 21 0 8 7 amappl15 192 9 0 9 1 0 1 1 0 8 1 amappl14 184 189 0 177 2 0 2 2 0 8 1 amappl13 176 15 0 15 1 0 1 1 0 8 1 amappl12 168 2484 0 2458 2 0 2 2 0 8 0 amappl11 160 59 0 49 1 0 1 1 0 8 0 amappl10 152 72 0 63 1 0 1 1 0 8 0 amappl9 144 141 0 139 1 0 1 1 0 8 0 amappl8 136 322 0 252 3 0 3 3 0 8 0 amappl7 128 80 0 68 1 0 1 1 0 8 0 amappl6 120 494 0 476 2 0 2 2 0 8 1 amappl5 112 248 0 236 1 0 1 1 0 8 0 amappl4 104 640 0 604 2 0 2 2 0 8 0 amappl3 96 9599 0 9529 3 0 3 3 0 8 0 amappl2 88 2224 0 2154 3 0 3 3 0 8 1 amappl1 80 14779 0 14286 22 1 21 22 0 8 8 amappl 88 13675 0 13486 6 0 6 6 0 92 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 128 253 0 253 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 88 0 6 2 0 2 2 0 8 0 uaddrrnd 24 1723 0 1683 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1723 0 1683 1 0 1 1 0 8 0 vmmpekpl 168 15980 0 15915 3 0 3 3 0 8 0 vmmpepl 168 123482 0 121694 110 0 110 110 0 357 18 vmsppl 344 1722 0 1683 4 0 4 4 0 8 0 rwobjpl 24 41152 0 35590 34 0 34 34 0 8 0 pdppl 4096 3452 0 3381 166 87 79 79 0 8 8 pvpl 32 792739 0 781387 356 16 340 356 0 265 232 pmappl 216 1722 0 1683 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 472 0 119 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff8000fffe9d70) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a678b08) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a678b08,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d2d49688650, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff8000fffe9d70) at kcov_remote_enter+0x122 sys/dev/kcov.c:675 timeout_run(ffff80002a678b08) at timeout_run+0x84 sys/kern/kern_timeout.c:664 softclock_process_tick_timeout(ffff80002a678b08,0) at softclock_process_tick_timeout+0x19b sys/kern/kern_timeout.c:723 softclock(0) at softclock+0x139 sys/kern/kern_timeout.c:755 softintr_dispatch(0) at softintr_dispatch+0xc1 sys/arch/amd64/amd64/softintr.c:90 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7d2d49688650, count: -6