uvm_fault(0xfffffd806aeb9de0, 0x608, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x19f: movq %r13,0x608 TID PID UID PRFLAGS PFLAGS CPU COMMAND *156948 67739 0 0 0x4000000 0 syz-executor.3 pppacopen(86353,1,2000,ffff80002166ea80) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000216cadc8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8069d0e1d8,1,fffffd807f7d8960,ffff80002166ea80) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000216cb018,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166ea80,ffffff9c,20000780,0,0,ffff8000216cb200) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000216cb270) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab54da3c260, 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(0xfffffd806aeb9de0, 0x608, 0, 2) -> e ddb> trace pppacopen(86353,1,2000,ffff80002166ea80) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000216cadc8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8069d0e1d8,1,fffffd807f7d8960,ffff80002166ea80) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000216cb018,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166ea80,ffffff9c,20000780,0,0,ffff8000216cb200) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000216cb270) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab54da3c260, count: -7 ddb> show registers rdi 0xffff800024b4e000 rsi 0x3b1 rbp 0xffff8000216cad40 rbx 0 rdx 0xffff800024b4e000 rcx 0x3b0 rax 0xffffffff81540f4f pppacopen+0x19f r8 0x6b0 r9 0xfffffd807f7d8960 r10 0xa9489dd0dc688cb9 r11 0x62e138d9a6a30b88 r12 0xfffffd8069d0e1d8 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff8000216cadc8 rip 0xffffffff81540f4f pppacopen+0x19f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000216cacf0 ss 0x10 pppacopen+0x19f: movq %r13,0x608 ddb> show proc PROC (syz-executor.3) pid=156948 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff80002166e000,0xffff80002166e2b0 process=0xffff8000216707e8 user=0xffff8000216c6000, vmspace=0xfffffd806aeb9de0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 6309 10301 93245 0 2 0 syz-executor.2 6309 433101 93245 0 2 0x4000000 syz-executor.2 17325 341831 83871 0 2 0 syz-executor.0 17325 187158 83871 0 3 0x4000080 fsleep syz-executor.0 67739 278891 8911 0 2 0 syz-executor.3 *67739 156948 8911 0 7 0x4000000 syz-executor.3 54023 248388 1948 0 2 0 syz-executor.1 54023 373148 1948 0 3 0x4000080 fsleep syz-executor.1 83871 139065 89328 0 3 0x82 nanoslp syz-executor.0 80038 3136 1 0 3 0x100083 ttyin getty 78197 362490 0 0 3 0x14200 acct acct 8911 440075 89328 0 3 0x82 nanoslp syz-executor.3 60440 486076 0 0 3 0x14200 bored sosplice 93245 135223 89328 0 3 0x82 nanoslp syz-executor.2 1948 482537 89328 0 3 0x82 nanoslp syz-executor.1 89328 121701 83150 0 3 0x82 thrsleep syz-fuzzer 89328 280854 83150 0 3 0x4000082 thrsleep syz-fuzzer 89328 400161 83150 0 3 0x4000082 thrsleep syz-fuzzer 89328 279858 83150 0 3 0x4000082 kqread syz-fuzzer 89328 459464 83150 0 3 0x4000082 thrsleep syz-fuzzer 89328 296363 83150 0 3 0x4000082 thrsleep syz-fuzzer 83150 491060 31338 0 3 0x10008a sigsusp ksh 31338 1982 44934 0 3 0x9a poll sshd 44934 115568 1 0 3 0x88 poll sshd 217 17661 60315 73 3 0x100090 kqread syslogd 60315 48125 1 0 3 0x100082 netio syslogd 59293 416418 1 0 3 0x100080 kqread resolvd 28427 496450 99471 77 3 0x100092 kqread dhcpleased 91112 192994 99471 77 3 0x100092 kqread dhcpleased 99471 438415 1 0 3 0x80 kqread dhcpleased 42306 384704 0 0 3 0x14200 bored smr 10256 178134 0 0 2 0x14200 zerothread 70974 381291 0 0 3 0x14200 aiodoned aiodoned 42496 470679 0 0 3 0x14200 syncer update 45942 100033 0 0 3 0x14200 cleaner cleaner 49079 176812 0 0 3 0x14200 reaper reaper 38354 214896 0 0 3 0x14200 pgdaemon pagedaemon 55002 251041 0 0 3 0x14200 bored viomb 90970 520508 0 0 3 0x40014200 acpi0 acpi0 20512 497747 0 0 3 0x14200 bored softnet 35826 153339 0 0 3 0x14200 bored systqmp 28399 459422 0 0 3 0x14200 bored systq 87725 4793 0 0 3 0x40014200 bored softclock 39161 435802 0 0 3 0x40014200 idle0 1 237978 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 10142 6392K 6851K 78643K 13313 0 pcb 13 8K 8K 78643K 129 0 rtable 131 9K 9K 78643K 712 0 ifaddr 46 12K 14K 78643K 239 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 37 0 ioctlops 0 0K 4K 78643K 240 0 iov 0 0K 24K 78643K 73 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1233 78K 78K 78643K 2124 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 0K 0K 78643K 2 0 sem 11 1K 1K 78643K 49 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 41K 78643K 3155 0 sigio 0 0K 0K 78643K 24 0 proc 58 55K 71K 78643K 523 0 subproc 52 3K 3K 78643K 78 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 276 0 in_multi 33 2K 3K 78643K 173 0 ether_multi 1 0K 0K 78643K 36 0 mrt 2 0K 0K 78643K 36 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 2K 78643K 560 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 248 110K 114K 78643K 38271 0 UVM aobj 21 4K 4K 78643K 21 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 139 0 NDP 5 0K 1K 78643K 37 0 temp 86 4193K 4271K 78643K 18654 0 kqueue 10 14K 20K 78643K 124 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 120 152 0 149 1 0 1 1 0 8 0 rtentry 112 100 0 55 2 0 2 2 0 8 0 unpcb 136 758 0 745 1 0 1 1 0 8 0 syncache 296 96 0 96 3 3 0 1 0 8 0 tcpqe 32 47 0 47 2 2 0 1 0 8 0 tcpcb 736 715 0 704 10 7 3 5 0 8 0 arp 88 15 0 9 1 0 1 1 0 8 0 inpcb 304 1496 0 1482 3 1 2 2 0 8 0 nd6 48 22 0 16 1 0 1 1 0 8 0 kcovpl 48 6 0 2 1 0 1 1 0 8 0 pfstscr 40 9 0 8 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 143 0 132 2 1 1 1 0 8 0 pftag 88 24 0 21 3 2 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 18 0 16 1 0 1 1 0 8 0 pfstate 320 9 0 8 1 0 1 1 0 8 0 pfrule 1360 81 0 65 4 2 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 403 0 211 20 8 12 19 0 8 0 art_table 32 404 0 211 3 1 2 3 0 8 0 art_node 16 99 0 59 1 0 1 1 0 8 0 sysvmsgpl 40 83 0 55 1 0 1 1 0 8 0 semupl 112 14 0 14 1 1 0 1 0 8 0 semapl 112 29 0 20 1 0 1 1 0 8 0 shmpl 112 18 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5624 0 4215 89 0 89 89 0 8 0 ffsino 240 5624 0 4215 84 0 84 84 0 8 0 nchpl 144 9670 0 8080 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 23665 0 23665 2 1 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 28 0 24 3 2 1 1 0 8 0 pfiaddrpl 120 55 0 35 2 1 1 1 0 8 0 scsiplug 72 11 0 11 1 1 0 1 0 8 0 scxspl 216 28882 0 28882 10 9 1 8 0 8 1 plimitpl 152 122 0 112 1 0 1 1 0 8 0 sigapl 424 3370 0 3334 7 2 5 5 0 8 0 futexpl 64 20780 0 20778 1 0 1 1 0 8 0 knotepl 112 495 0 445 2 0 2 2 0 8 0 kqueuepl 184 292 0 286 1 0 1 1 0 8 0 pipepl 304 128 0 112 2 0 2 2 0 8 0 fdescpl 432 3355 0 3334 3 0 3 3 0 8 0 filepl 120 10032 0 9886 5 0 5 5 0 8 0 lockfpl 104 455 0 453 1 0 1 1 0 8 0 lockfspl 48 172 0 170 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 1307 0 1297 1 0 1 1 0 8 0 zombiepl 144 3334 0 3334 2 1 1 1 0 8 1 processpl 1000 3370 0 3334 5 0 5 5 0 8 0 procpl 672 6722 0 6677 10 6 4 5 0 8 0 sosppl 168 67 0 67 5 5 0 1 0 8 0 sockpl 448 2406 0 2376 8 4 4 5 0 8 0 mcl64k 65536 113 0 113 4 4 0 1 0 8 0 mcl16k 16384 20 0 20 2 2 0 1 0 8 0 mcl12k 12288 27 0 27 4 4 0 1 0 8 0 mcl9k 9216 4 0 4 1 1 0 1 0 8 0 mcl8k 8192 74 0 74 5 5 0 1 0 8 0 mcl4k 4096 92 0 92 4 3 1 1 0 8 1 mcl2k2 2112 12 0 12 3 3 0 1 0 8 0 mcl2k 2048 24969 0 24921 13 5 8 9 0 8 0 mtagpl 96 164 0 96 4 1 3 3 0 8 0 mbufpl 256 79719 0 79342 32 2 30 32 0 8 0 bufpl 288 8522 0 2105 459 0 459 459 0 8 0 anonpl 24 879917 0 871652 92 40 52 73 0 188 0 amapchunkpl 152 93478 0 92987 43 24 19 34 0 158 0 amappl16 200 9538 0 9344 37 26 11 22 0 8 0 amappl15 192 1456 0 1453 1 0 1 1 0 8 0 amappl14 184 4 0 0 1 0 1 1 0 8 0 amappl13 176 914 0 909 1 0 1 1 0 8 0 amappl12 168 18 0 15 1 0 1 1 0 8 0 amappl11 160 680 0 668 1 0 1 1 0 8 0 amappl10 152 44 0 37 1 0 1 1 0 8 0 amappl9 144 596 0 593 1 0 1 1 0 8 0 amappl8 136 423 0 373 2 0 2 2 0 8 0 amappl7 128 76 0 69 1 0 1 1 0 8 0 amappl6 120 289 0 273 1 0 1 1 0 8 0 amappl5 112 1831 0 1814 1 0 1 1 0 8 0 amappl4 104 1869 0 1844 1 0 1 1 0 8 0 amappl3 96 1000 0 982 1 0 1 1 0 8 0 amappl2 88 1255 0 1214 2 0 2 2 0 8 0 amappl1 80 57678 0 57202 14 4 10 12 0 8 0 amappl 88 37777 0 37599 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 20 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3383 0 3358 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3383 0 3358 1 0 1 1 0 8 0 vmmpekpl 168 20522 0 20493 2 0 2 2 0 8 0 vmmpepl 168 292724 0 291041 96 22 74 82 0 357 0 vmsppl 272 3382 0 3358 3 1 2 2 0 8 0 rwobjpl 24 72414 0 65496 42 0 42 42 0 8 0 pdppl 4096 6772 0 6720 78 26 52 52 0 8 0 pvpl 32 1618979 0 1607067 173 73 100 137 0 265 0 pmappl 216 3382 0 3358 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 824 0 72 22 0 22 22 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pppacopen(86353,1,2000,ffff80002166ea80) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000216cadc8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8069d0e1d8,1,fffffd807f7d8960,ffff80002166ea80) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000216cb018,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166ea80,ffffff9c,20000780,0,0,ffff8000216cb200) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000216cb270) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab54da3c260, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace pppacopen(86353,1,2000,ffff80002166ea80) at pppacopen+0x19f sys/net/if_pppx.c:1020 spec_open(ffff8000216cadc8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8069d0e1d8,1,fffffd807f7d8960,ffff80002166ea80) at VOP_OPEN+0x6c sys/kern/vfs_vops.c:138 vn_open(ffff8000216cb018,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff80002166ea80,ffffff9c,20000780,0,0,ffff8000216cb200) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000216cb270) at syscall+0x44e sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab54da3c260, count: -7