uvm_fault(0xfffffd806aed4780, 0x608, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x19f: movq %r13,0x608 TID PID UID PRFLAGS PFLAGS CPU COMMAND *304475 46001 0 0 0x4000000 0 syz-executor.1 pppacopen(4086331,1,2000,ffff80002166f500) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff800027f83998) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80770872d0,1,fffffd807f7d8960,ffff80002166f500) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff800027f83be8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166f500,ffffff9c,20000100,0,0,ffff800027f83dd0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027f83e40) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5c1c9e10f0, 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(0xfffffd806aed4780, 0x608, 0, 2) -> e ddb> trace pppacopen(4086331,1,2000,ffff80002166f500) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff800027f83998) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80770872d0,1,fffffd807f7d8960,ffff80002166f500) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff800027f83be8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166f500,ffffff9c,20000100,0,0,ffff800027f83dd0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027f83e40) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5c1c9e10f0, count: -7 ddb> show registers rdi 0xffff800026556000 rsi 0x40b rbp 0xffff800027f83910 rbx 0 rdx 0xffff800026556000 rcx 0x40a rax 0xffffffff81540f4f pppacopen+0x19f r8 0x6b0 r9 0xfffffd807f7d8960 r10 0xca22d0481688a746 r11 0x8f84d4e3978c09a3 r12 0xfffffd80770872d0 r13 0 r14 0x4086331 __kernel_phys_end+0x1686331 r15 0xffff800027f83998 rip 0xffffffff81540f4f pppacopen+0x19f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027f838c0 ss 0x10 pppacopen+0x19f: movq %r13,0x608 ddb> show proc PROC (syz-executor.1) pid=304475 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002166e540,0xffff80002166e7f0 process=0xffff8000216d9b78 user=0xffff800027f7e000, vmspace=0xfffffd806aed4780 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 13023 453010 31104 0 2 0 syz-executor.3 13023 460677 31104 0 3 0x4000080 netio syz-executor.3 46001 271523 50777 0 2 0 syz-executor.1 *46001 304475 50777 0 7 0x4000000 syz-executor.1 7973 516762 0 0 3 0x14200 bored sosplice 31104 301017 17681 0 2 0x482 syz-executor.3 50777 216554 17681 0 2 0x482 syz-executor.1 31276 39142 17681 0 2 0x2 syz-executor.2 52433 22720 17681 0 2 0x482 syz-executor.0 17681 416423 57090 0 3 0x82 thrsleep syz-fuzzer 17681 94999 57090 0 2 0x4000482 syz-fuzzer 17681 387413 57090 0 3 0x4000082 kqread syz-fuzzer 17681 408544 57090 0 3 0x4000082 thrsleep syz-fuzzer 17681 39903 57090 0 3 0x4000082 thrsleep syz-fuzzer 17681 333098 57090 0 3 0x4000082 thrsleep syz-fuzzer 17681 378749 57090 0 3 0x4000082 thrsleep syz-fuzzer 57090 311352 86087 0 3 0x10008a sigsusp ksh 86087 161201 44021 0 3 0x9a poll sshd 33712 422360 1 0 3 0x100083 ttyin getty 44021 337170 1 0 3 0x88 poll sshd 57442 417301 38234 73 3 0x100090 kqread syslogd 38234 80376 1 0 3 0x100082 netio syslogd 77709 500599 1 0 3 0x100080 kqread resolvd 38566 246034 35814 77 3 0x100092 kqread dhcpleased 27139 197204 35814 77 3 0x100092 kqread dhcpleased 35814 201971 1 0 3 0x80 kqread dhcpleased 60604 375771 0 0 3 0x14200 bored smr 1379 128461 0 0 2 0x14200 zerothread 11441 405681 0 0 3 0x14200 aiodoned aiodoned 26354 510317 0 0 3 0x14200 syncer update 37511 207668 0 0 3 0x14200 cleaner cleaner 98921 463703 0 0 3 0x14200 reaper reaper 98197 248998 0 0 3 0x14200 pgdaemon pagedaemon 15780 405454 0 0 3 0x14200 bored viomb 52109 197679 0 0 3 0x40014200 acpi0 acpi0 88486 424402 0 0 3 0x14200 bored softnet 83652 50068 0 0 3 0x14200 bored systqmp 79505 208436 0 0 3 0x14200 bored systq 41464 394555 0 0 3 0x40014200 bored softclock 5175 367675 0 0 3 0x40014200 idle0 1 62775 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 10152 6559K 6751K 78643K 11945 0 pcb 13 8K 8K 78643K 82 0 rtable 117 4K 5K 78643K 502 0 ifaddr 50 12K 12K 78643K 129 0 sysctl 2 0K 0K 78643K 2 0 counters 22 16K 16K 78643K 34 0 ioctlops 0 0K 4K 78643K 99 0 iov 0 0K 24K 78643K 33 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1230 77K 78K 78643K 1587 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 25 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 64 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 49K 78643K 1286 0 sigio 0 0K 0K 78643K 4 0 proc 58 55K 87K 78643K 558 0 subproc 52 3K 3K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 88 0 in_multi 41 2K 3K 78643K 248 0 ether_multi 1 0K 0K 78643K 51 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 649 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 225 156K 156K 78643K 15667 0 UVM aobj 35 2K 2K 78643K 58 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 88 0 NDP 6 0K 1K 78643K 40 0 temp 94 4191K 4259K 78643K 9337 0 kqueue 10 14K 18K 78643K 87 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 98 0 95 1 0 1 1 0 8 0 rtentry 112 144 0 98 2 0 2 2 0 8 0 unpcb 136 259 0 244 1 0 1 1 0 8 0 syncache 296 21 0 21 3 3 0 1 0 8 0 tcpqe 32 4 0 4 1 1 0 1 0 8 0 tcpcb 736 248 0 235 6 4 2 4 0 8 0 arp 88 24 0 16 1 0 1 1 0 8 0 inpcb 304 541 0 530 5 3 2 2 0 8 1 nd6 48 33 0 24 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 11 0 7 1 0 1 1 0 8 0 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 6 1 0 1 1 0 8 0 pfstate 320 4 0 3 1 0 1 1 0 8 0 pfrule 1360 17 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 588 0 393 18 3 15 18 0 8 1 art_table 32 589 0 393 3 0 3 3 0 8 0 art_node 16 143 0 104 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 6 1 0 1 1 0 8 0 semupl 112 8 0 8 1 1 0 1 0 8 0 semapl 112 58 0 48 1 0 1 1 0 8 0 shmpl 112 55 0 23 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2938 0 1525 89 0 89 89 0 8 0 ffsino 240 2938 0 1525 84 0 84 84 0 8 0 nchpl 144 4596 0 3001 61 0 61 61 0 8 0 uvmvnodes 80 3240 0 0 67 0 67 67 0 8 0 vnodes 224 3240 0 0 191 0 191 191 0 8 0 namei 1024 12509 0 12508 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 528 7 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 0 1 0 1 1 0 8 0 scxspl 216 14427 0 14427 9 8 1 8 0 8 1 plimitpl 152 70 0 60 1 0 1 1 0 8 0 sigapl 424 1487 0 1454 5 1 4 5 0 8 0 futexpl 64 7318 0 7318 1 0 1 1 0 8 1 knotepl 112 572 0 522 2 0 2 2 0 8 0 kqueuepl 184 126 0 119 1 0 1 1 0 8 0 pipepl 304 159 0 143 2 0 2 2 0 8 0 fdescpl 432 1473 0 1454 3 0 3 3 0 8 0 filepl 120 4732 0 4583 6 1 5 6 0 8 0 lockfpl 104 168 0 166 1 0 1 1 0 8 0 lockfspl 48 61 0 59 1 0 1 1 0 8 0 sessionpl 144 26 0 14 1 0 1 1 0 8 0 pgrppl 48 26 0 14 1 0 1 1 0 8 0 ucredpl 96 758 0 748 1 0 1 1 0 8 0 zombiepl 144 1454 0 1453 1 0 1 1 0 8 0 processpl 1000 1487 0 1453 5 0 5 5 0 8 0 procpl 672 2732 0 2690 5 1 4 5 0 8 0 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 448 906 0 877 6 2 4 5 0 8 0 mcl64k 65536 47 0 47 2 1 1 1 0 8 1 mcl16k 16384 4 0 4 1 1 0 1 0 8 0 mcl12k 12288 13 0 13 2 1 1 1 0 8 1 mcl9k 9216 9 0 9 3 2 1 1 0 8 1 mcl8k 8192 18 0 18 1 1 0 1 0 8 0 mcl4k 4096 26 0 25 4 3 1 1 0 8 0 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 30871 0 30826 9 2 7 8 0 8 0 mtagpl 96 79 0 12 3 1 2 2 0 8 0 mbufpl 256 64669 0 64321 28 4 24 24 0 8 1 bufpl 288 5766 0 139 402 0 402 402 0 8 0 anonpl 24 339270 0 328185 76 5 71 71 0 188 0 amapchunkpl 152 37345 0 36852 24 2 22 22 0 158 1 amappl16 200 2972 0 2624 21 1 20 20 0 8 0 amappl15 192 219 0 217 2 1 1 1 0 8 0 amappl14 184 40 0 37 1 0 1 1 0 8 0 amappl13 176 83 0 81 1 0 1 1 0 8 0 amappl12 168 469 0 464 1 0 1 1 0 8 0 amappl11 160 48 0 37 1 0 1 1 0 8 0 amappl10 152 377 0 368 1 0 1 1 0 8 0 amappl9 144 458 0 455 1 0 1 1 0 8 0 amappl8 136 584 0 550 2 0 2 2 0 8 0 amappl7 128 226 0 217 1 0 1 1 0 8 0 amappl6 120 187 0 170 1 0 1 1 0 8 0 amappl5 112 1440 0 1424 1 0 1 1 0 8 0 amappl4 104 734 0 711 1 0 1 1 0 8 0 amappl3 96 655 0 637 1 0 1 1 0 8 0 amappl2 88 640 0 592 2 0 2 2 0 8 0 amappl1 80 27394 0 26939 12 1 11 12 0 8 0 amappl 88 15215 0 15057 6 1 5 5 0 92 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 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 57 0 23 1 0 1 1 0 8 0 uaddrrnd 24 1480 0 1454 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1480 0 1454 1 0 1 1 0 8 0 vmmpekpl 168 12140 0 12111 2 0 2 2 0 8 0 vmmpepl 168 133123 0 131430 105 23 82 95 0 357 1 vmsppl 272 1479 0 1454 3 1 2 2 0 8 0 rwobjpl 24 33637 0 29244 27 0 27 27 0 8 0 pdppl 4096 2966 0 2915 87 32 55 56 0 8 4 pvpl 32 706742 0 694050 148 34 114 137 0 265 4 pmappl 216 1479 0 1454 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 749 0 56 20 0 20 20 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pppacopen(4086331,1,2000,ffff80002166f500) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff800027f83998) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80770872d0,1,fffffd807f7d8960,ffff80002166f500) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff800027f83be8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166f500,ffffff9c,20000100,0,0,ffff800027f83dd0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027f83e40) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5c1c9e10f0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace pppacopen(4086331,1,2000,ffff80002166f500) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff800027f83998) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80770872d0,1,fffffd807f7d8960,ffff80002166f500) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff800027f83be8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166f500,ffffff9c,20000100,0,0,ffff800027f83dd0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027f83e40) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf5c1c9e10f0, count: -7