uvm_fault(0xfffffd807f018880, 0x608, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x19f: movq %r13,0x608 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 85773 54375 0 0 0x4000000 0 syz-executor.0 pppacopen(86353,2,2000,ffff80002163e000) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000230d4b28) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806917e340,2,fffffd807f7d87e0,ffff80002163e000) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000230d4d78,2,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002163e000,ffffff9c,20000040,1,0,ffff8000230d4f60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000230d4fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xec6b00439b0, 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(0xfffffd807f018880, 0x608, 0, 2) -> e ddb> trace pppacopen(86353,2,2000,ffff80002163e000) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000230d4b28) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806917e340,2,fffffd807f7d87e0,ffff80002163e000) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000230d4d78,2,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002163e000,ffffff9c,20000040,1,0,ffff8000230d4f60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000230d4fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xec6b00439b0, count: -7 ddb> show registers rdi 0xffff800023110000 rsi 0x42e rbp 0xffff8000230d4aa0 rbx 0 rdx 0xffff800023110000 rcx 0x42d rax 0xffffffff81540f4f pppacopen+0x19f r8 0x6b0 r9 0xfffffd807f7d87e0 r10 0x53f556ccfb009277 r11 0xe68b0d8259e8deec r12 0xfffffd806917e340 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff8000230d4b28 rip 0xffffffff81540f4f pppacopen+0x19f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000230d4a50 ss 0x10 pppacopen+0x19f: movq %r13,0x608 ddb> show proc PROC (syz-executor.0) pid=85773 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=56, nice=20 forw=0xffffffffffffffff, list=0xffff80002163ea80,0xffff80002163e550 process=0xffff80002164bb78 user=0xffff8000230d0000, vmspace=0xfffffd807f018880 estcpu=6, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25496 118943 33099 0 2 0 syz-executor.2 25496 228404 33099 0 3 0x4000080 fsleep syz-executor.2 54375 468989 73185 0 2 0 syz-executor.0 *54375 85773 73185 0 7 0x4000000 syz-executor.0 64094 94472 9824 0 3 0x82 nanoslp syz-executor.1 12547 328940 0 0 3 0x14200 bored sosplice 2026 289607 9824 0 2 0x2 syz-executor.3 33099 91919 9824 0 2 0x482 syz-executor.2 73185 12011 9824 0 3 0x82 nanoslp syz-executor.0 9824 462722 4262 0 3 0x82 thrsleep syz-fuzzer 9824 346131 4262 0 2 0x4000002 syz-fuzzer 9824 30955 4262 0 3 0x4000082 thrsleep syz-fuzzer 9824 505458 4262 0 3 0x4000082 thrsleep syz-fuzzer 9824 316638 4262 0 3 0x4000082 thrsleep syz-fuzzer 9824 40907 4262 0 3 0x4000082 thrsleep syz-fuzzer 9824 160660 4262 0 2 0x4000002 syz-fuzzer 4262 214631 83062 0 3 0x10008a sigsusp ksh 83062 339144 88632 0 3 0x9a poll sshd 26450 204614 1 0 3 0x100083 ttyin getty 88632 176910 1 0 3 0x88 poll sshd 34033 93557 49968 73 3 0x100090 kqread syslogd 49968 467127 1 0 3 0x100082 netio syslogd 62448 422169 1 0 3 0x100080 kqread resolvd 91531 494428 14611 77 3 0x100092 kqread dhcpleased 89836 489367 14611 77 3 0x100092 kqread dhcpleased 14611 416398 1 0 3 0x80 kqread dhcpleased 36518 285969 0 0 3 0x14200 bored smr 37891 41618 0 0 2 0x14200 zerothread 48616 250065 0 0 3 0x14200 aiodoned aiodoned 53310 139156 0 0 3 0x14200 syncer update 53983 104088 0 0 3 0x14200 cleaner cleaner 10106 435930 0 0 3 0x14200 reaper reaper 2196 270910 0 0 3 0x14200 pgdaemon pagedaemon 41297 24978 0 0 3 0x14200 bored viomb 41580 172615 0 0 3 0x40014200 acpi0 acpi0 1912 154210 0 0 3 0x14200 bored softnet 11134 6799 0 0 3 0x14200 bored systqmp 20007 129474 0 0 3 0x14200 bored systq 95267 12164 0 0 3 0x40014200 bored softclock 20415 431590 0 0 3 0x40014200 idle0 1 478287 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 10144 6454K 6778K 78643K 11484 0 pcb 13 8K 8K 78643K 18 0 rtable 128 3K 4K 78643K 322 0 ifaddr 46 11K 12K 78643K 75 0 counters 22 16K 16K 78643K 26 0 ioctlops 0 0K 4K 78643K 43 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1231 77K 78K 78643K 1353 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 19 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 45K 78643K 376 0 sigio 0 0K 0K 78643K 4 0 proc 58 55K 71K 78643K 470 0 subproc 52 3K 3K 78643K 91 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 44 2K 3K 78643K 88 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 2K 78643K 479 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 206 43K 43K 78643K 5247 0 UVM aobj 4 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 2 0 NDP 6 0K 1K 78643K 24 0 temp 48 4179K 4243K 78643K 4390 0 kqueue 10 14K 18K 78643K 34 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 39 0 36 1 0 1 1 0 8 0 rtentry 112 100 0 45 2 0 2 2 0 8 0 unpcb 136 93 0 80 1 0 1 1 0 8 0 syncache 296 11 0 11 2 1 1 1 0 8 1 tcpqe 32 47 0 47 1 1 0 1 0 8 0 tcpcb 736 48 0 39 3 1 2 2 0 8 1 arp 88 16 0 8 1 0 1 1 0 8 0 inpcb 304 121 0 114 2 0 2 2 0 8 1 nd6 48 21 0 12 1 0 1 1 0 8 0 kcovpl 48 7 0 3 1 0 1 1 0 8 0 pfrule 1360 6 0 6 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 408 0 176 18 0 18 18 0 8 2 art_table 32 409 0 176 3 0 3 3 0 8 0 art_node 16 99 0 49 1 0 1 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 6 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1766 0 361 89 0 89 89 0 8 0 ffsino 240 1766 0 361 83 0 83 83 0 8 0 nchpl 144 2329 0 734 61 0 61 61 0 8 0 uvmvnodes 80 1917 0 0 40 0 40 40 0 8 0 vnodes 224 1917 0 0 113 0 113 113 0 8 0 namei 1024 6504 0 6503 1 0 1 1 0 8 0 scxspl 216 6656 0 6656 10 9 1 8 0 8 1 plimitpl 152 25 0 15 1 0 1 1 0 8 0 sigapl 424 577 0 544 5 1 4 5 0 8 0 futexpl 64 1551 0 1550 1 0 1 1 0 8 0 knotepl 112 268 0 218 2 0 2 2 0 8 0 kqueuepl 184 55 0 49 1 0 1 1 0 8 0 pipepl 304 105 0 89 2 0 2 2 0 8 0 fdescpl 432 563 0 544 3 0 3 3 0 8 0 filepl 120 1919 0 1773 5 0 5 5 0 8 0 lockfpl 104 30 0 28 1 0 1 1 0 8 0 lockfspl 48 16 0 14 1 0 1 1 0 8 0 sessionpl 144 22 0 10 1 0 1 1 0 8 0 pgrppl 48 22 0 10 1 0 1 1 0 8 0 ucredpl 96 189 0 179 1 0 1 1 0 8 0 zombiepl 144 544 0 543 1 0 1 1 0 8 0 processpl 1000 577 0 543 5 0 5 5 0 8 0 procpl 672 865 0 823 4 0 4 4 0 8 0 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 448 263 0 240 4 0 4 4 0 8 1 mcl64k 65536 5 0 5 1 0 1 1 0 8 1 mcl16k 16384 10 0 10 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 11 0 11 2 1 1 1 0 8 1 mcl2k 2048 57874 0 57832 13 6 7 13 0 8 0 mtagpl 96 46 0 11 2 1 1 1 0 8 0 mbufpl 256 95366 0 95093 19 0 19 19 0 8 0 bufpl 288 3752 0 131 259 0 259 259 0 8 0 anonpl 24 123473 0 111500 89 2 87 87 0 188 2 amapchunkpl 152 12593 0 12033 28 3 25 26 0 158 1 amappl16 200 1298 0 867 25 0 25 25 0 8 0 amappl15 192 10 0 10 2 1 1 1 0 8 1 amappl14 184 6 0 4 1 0 1 1 0 8 0 amappl13 176 147 0 144 1 0 1 1 0 8 0 amappl12 168 78 0 74 1 0 1 1 0 8 0 amappl11 160 44 0 33 1 0 1 1 0 8 0 amappl10 152 113 0 106 1 0 1 1 0 8 0 amappl9 144 523 0 518 1 0 1 1 0 8 0 amappl8 136 375 0 345 2 0 2 2 0 8 0 amappl7 128 81 0 73 1 0 1 1 0 8 0 amappl6 120 226 0 210 1 0 1 1 0 8 0 amappl5 112 448 0 433 1 0 1 1 0 8 0 amappl4 104 594 0 573 1 0 1 1 0 8 0 amappl3 96 295 0 276 1 0 1 1 0 8 0 amappl2 88 448 0 406 2 0 2 2 0 8 0 amappl1 80 12661 0 12213 13 2 11 12 0 8 0 amappl 88 4907 0 4750 5 0 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 8 0 5 1 0 1 1 0 8 0 uaddrrnd 24 563 0 544 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 563 0 544 1 0 1 1 0 8 0 vmmpekpl 168 7756 0 7729 2 0 2 2 0 8 0 vmmpepl 168 55678 0 53923 113 18 95 101 0 357 15 vmsppl 272 562 0 544 2 0 2 2 0 8 0 rwobjpl 24 15890 0 12790 19 0 19 19 0 8 0 pdppl 4096 1132 0 1088 66 18 48 54 0 8 4 pvpl 32 309276 0 293917 153 0 153 153 0 265 11 pmappl 216 562 0 544 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 571 0 29 16 0 16 16 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pppacopen(86353,2,2000,ffff80002163e000) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000230d4b28) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806917e340,2,fffffd807f7d87e0,ffff80002163e000) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000230d4d78,2,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002163e000,ffffff9c,20000040,1,0,ffff8000230d4f60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000230d4fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xec6b00439b0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace pppacopen(86353,2,2000,ffff80002163e000) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000230d4b28) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806917e340,2,fffffd807f7d87e0,ffff80002163e000) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000230d4d78,2,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002163e000,ffffff9c,20000040,1,0,ffff8000230d4f60) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000230d4fd0) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xec6b00439b0, count: -7