uvm_fault(0xfffffd8066651758, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *507084 69233 0 0 0x4000000 0K syz-executor.1 pppacopen(4086331,1,2000,ffff800021254fc0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff80002124a1b8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806e3bc658,1,fffffd807f7d74e0,ffff800021254fc0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff80002124a408,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021254fc0,ffffff9c,20000240,0,0,ffff80002124a5f0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002124a660) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002124a660) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9bf007edf0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd8066651758, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(4086331,1,2000,ffff800021254fc0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff80002124a1b8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806e3bc658,1,fffffd807f7d74e0,ffff800021254fc0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff80002124a408,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021254fc0,ffffff9c,20000240,0,0,ffff80002124a5f0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002124a660) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002124a660) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9bf007edf0, count: -7 ddb{0}> show registers rdi 0xffff800021289000 rsi 0x81a rbp 0xffff80002124a130 rbx 0 rdx 0xffff800021289000 rcx 0x819 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d74e0 r10 0x7170f0513bf0c552 r11 0xc3cd62ad9aa40e0e r12 0xfffffd806e3bc658 r13 0 r14 0x4086331 __kernel_phys_end+0x1486331 r15 0xffff80002124a1b8 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002124a0e0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.1) pid=507084 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021255ce0,0xffffffff8293ceb0 process=0xffff8000211f0c88 user=0xffff800021245000, vmspace=0xfffffd8066651758 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69233 18889 97050 0 2 0 syz-executor.1 *69233 507084 97050 0 7 0x4000000 syz-executor.1 47605 346779 8234 0 2 0x482 syz-executor.2 19838 393256 0 0 3 0x14200 acct acct 79419 1831 8234 0 3 0x82 nanoslp syz-executor.0 70044 59354 8234 0 2 0x482 syz-executor.3 97050 268524 8234 0 3 0x82 nanoslp syz-executor.1 99889 306311 0 0 3 0x14280 nfsidl nfsio 40572 378609 0 0 3 0x14280 nfsidl nfsio 92399 184707 0 0 3 0x14280 nfsidl nfsio 64504 101680 0 0 3 0x14280 nfsidl nfsio 76232 343621 0 0 3 0x14280 nfsidl nfsio 6082 112603 0 0 3 0x14280 nfsidl nfsio 90065 277755 0 0 3 0x14280 nfsidl nfsio 10649 524224 0 0 3 0x14280 nfsidl nfsio 37205 441311 0 0 3 0x14280 nfsidl nfsio 23064 353582 0 0 3 0x14280 nfsidl nfsio 5030 295158 0 0 3 0x14280 nfsidl nfsio 83651 233981 0 0 3 0x14280 nfsidl nfsio 99278 326756 0 0 3 0x14280 nfsidl nfsio 13270 361854 0 0 3 0x14280 nfsidl nfsio 29745 400698 0 0 3 0x14280 nfsidl nfsio 11741 227338 0 0 3 0x14280 nfsidl nfsio 6029 499858 0 0 3 0x14280 nfsidl nfsio 44240 474555 0 0 3 0x14280 nfsidl nfsio 82371 377968 0 0 3 0x14280 nfsidl nfsio 3218 126282 0 0 3 0x14280 nfsidl nfsio 62341 230691 0 0 3 0x14200 bored sosplice 8234 154535 4205 0 3 0x82 thrsleep syz-fuzzer 8234 204943 4205 0 2 0x4000482 syz-fuzzer 8234 222599 4205 0 3 0x4000082 thrsleep syz-fuzzer 8234 151700 4205 0 3 0x4000082 thrsleep syz-fuzzer 8234 254049 4205 0 3 0x4000082 thrsleep syz-fuzzer 8234 46420 4205 0 3 0x4000082 thrsleep syz-fuzzer 8234 114044 4205 0 3 0x4000082 kqread syz-fuzzer 8234 219774 4205 0 3 0x4000082 thrsleep syz-fuzzer 4205 345646 82386 0 3 0x10008a sigsusp ksh 82386 142900 29711 0 3 0x9a poll sshd 24299 312404 1 0 3 0x100083 ttyin getty 29711 94721 1 0 3 0x88 poll sshd 87884 111453 84624 74 3 0x100092 bpf pflogd 84624 397112 1 0 3 0x80 netio pflogd 38123 429825 77906 73 3 0x100090 kqread syslogd 77906 229097 1 0 3 0x100082 netio syslogd 45972 14163 1 0 3 0x100080 kqread resolvd 98128 450954 85834 77 3 0x100092 kqread dhcpleased 84736 130402 85834 77 3 0x100092 kqread dhcpleased 85834 523218 1 0 3 0x80 kqread dhcpleased 41525 75698 0 0 3 0x14200 bored smr 35143 173410 0 0 2 0x14200 zerothread 66487 360995 0 0 3 0x14200 aiodoned aiodoned 28290 132852 0 0 3 0x14200 syncer update 24399 221836 0 0 3 0x14200 cleaner cleaner 35904 434022 0 0 3 0x14200 reaper reaper 17374 13867 0 0 3 0x14200 pgdaemon pagedaemon 90942 414708 0 0 3 0x14200 bored viomb 25593 237391 0 0 3 0x40014200 acpi0 acpi0 93850 395240 0 0 7 0x40014200 idle1 52169 111697 0 0 3 0x14200 bored softnet 46344 189697 0 0 3 0x14200 bored systqmp 81912 468862 0 0 3 0x14200 bored systq 69412 216747 0 0 3 0x40014200 bored softclock 18611 257306 0 0 3 0x40014200 idle0 1 436225 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 69233 (syz-executor.1) thread 0xffff800021254fc0 (507084) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828f9c10) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 6544K 6981K 78643K 15531 0 pcb 13 8K 8K 78643K 311 0 rtable 140 7K 8K 78643K 872 0 ifaddr 69 15K 17K 78643K 286 0 sysctl 1 1K 2K 78643K 8 0 counters 48 34K 34K 78643K 98 0 ioctlops 0 0K 4K 78643K 1862 0 iov 0 0K 48K 78643K 371 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1229 77K 78K 78643K 2885 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 105 0 VM map 2 1K 1K 78643K 2 0 sem 10 0K 1K 78643K 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 5419 0 sigio 0 0K 0K 78643K 108 0 proc 71 87K 123K 78643K 741 0 subproc 52 3K 3K 78643K 137 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 332 0 in_multi 51 3K 4K 78643K 254 0 ether_multi 1 0K 0K 78643K 29 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 820 0 pfkey data 0 0K 0K 78643K 11 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 239 48K 52K 78643K 64999 0 UVM aobj 58 7K 7K 78643K 62 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 355 0 NDP 9 0K 1K 78643K 61 0 temp 109 4216K 4280K 78643K 40124 0 kqueue 10 14K 44K 78643K 309 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 265 0 262 1 0 1 1 0 8 0 rtentry 112 158 0 105 3 1 2 3 0 8 0 unpcb 136 1271 0 1256 4 3 1 3 0 8 0 syncache 296 60 0 60 7 6 1 1 0 8 1 tcpqe 32 13 0 13 3 2 1 1 0 8 1 tcpcb 736 1137 0 1126 21 18 3 6 0 8 1 arp 120 23 0 13 1 0 1 1 0 8 0 inpcb 304 2709 0 2701 7 5 2 3 0 8 1 nd6 48 41 0 31 1 0 1 1 0 8 0 pkpcb 40 30 0 30 5 4 1 1 0 8 1 kcovpl 48 10 0 6 1 0 1 1 0 8 0 pfstscr 40 4 0 4 1 0 1 1 0 8 1 pffrag 232 2 0 2 2 2 0 1 0 482 0 pffrnode 88 2 0 2 2 2 0 1 0 8 0 pffrent 40 9 0 9 2 2 0 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 130 0 126 5 4 1 1 0 8 0 pftag 88 55 0 52 2 1 1 1 0 8 0 pfqueue 264 4 0 4 2 2 0 1 0 8 0 pfstitem 24 94 0 91 1 0 1 1 0 8 0 pfstkey 112 108 0 105 2 0 2 2 0 8 0 pfstate 320 100 0 97 7 5 2 5 0 8 0 pfrule 1360 273 0 207 7 1 6 6 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 694 0 495 21 5 16 19 0 8 2 art_table 32 695 0 495 3 0 3 3 0 8 1 art_node 16 157 0 111 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 8 0 0 1 0 1 1 0 8 0 shmpl 112 59 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8660 0 7239 91 1 90 90 0 8 0 ffsino 272 8660 0 7239 96 0 96 96 0 8 0 nchpl 144 15198 0 13595 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 38354 0 38354 2 1 1 1 0 8 1 percpumem 16 61 0 25 1 0 1 1 0 8 0 vmpool 560 14 0 14 2 2 0 1 0 8 0 pfiaddrpl 120 36 0 28 4 3 1 1 0 8 0 scxspl 216 58552 0 58552 11 10 1 7 0 8 1 plimitpl 152 243 0 232 1 0 1 1 0 8 0 sigapl 424 5662 0 5606 7 0 7 7 0 8 0 futexpl 64 37709 0 37709 3 2 1 1 0 8 1 knotepl 112 133 0 0 4 0 4 4 0 8 0 kqueuepl 216 699 0 693 2 1 1 2 0 8 0 pipepl 336 432 0 416 3 1 2 3 0 8 0 fdescpl 496 5626 0 5606 4 1 3 4 0 8 0 filepl 152 17876 0 17725 10 3 7 8 0 8 1 lockfpl 104 925 0 923 1 0 1 1 0 8 0 lockfspl 48 370 0 368 1 0 1 1 0 8 0 sessionpl 144 26 0 13 1 0 1 1 0 8 0 pgrppl 48 67 0 54 1 0 1 1 0 8 0 ucredpl 96 2584 0 2561 1 0 1 1 0 8 0 zombiepl 144 5606 0 5603 1 0 1 1 0 8 0 processpl 1064 5662 0 5603 4 0 4 4 0 8 0 procpl 672 11593 0 11526 13 6 7 7 0 8 1 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 124 0 124 4 4 0 1 0 8 0 sockpl 480 4275 0 4249 19 14 5 9 0 8 1 mcl64k 65536 13 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 1 2 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 226 0 0 13 0 13 13 0 8 0 mtagpl 96 399 0 0 9 0 9 9 0 8 0 mbufpl 256 1046 0 0 57 1 56 56 0 8 0 bufpl 288 16395 0 10051 454 0 454 454 0 8 0 anonpl 24 1477768 0 1470294 143 83 60 102 0 186 0 amapchunkpl 152 156308 0 155855 55 33 22 42 0 158 2 amappl16 200 14319 0 14158 55 45 10 24 0 8 1 amappl15 192 2364 0 2362 1 0 1 1 0 8 0 amappl14 184 431 0 428 1 0 1 1 0 8 0 amappl13 176 216 0 214 1 0 1 1 0 8 0 amappl12 168 19 0 13 1 0 1 1 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 1266 0 1258 1 0 1 1 0 8 0 amappl9 144 952 0 948 1 0 1 1 0 8 0 amappl8 136 1683 0 1616 3 0 3 3 0 8 0 amappl7 128 1223 0 1212 1 0 1 1 0 8 0 amappl6 120 661 0 642 1 0 1 1 0 8 0 amappl5 112 6296 0 6278 1 0 1 1 0 8 0 amappl4 104 1158 0 1133 1 0 1 1 0 8 0 amappl3 96 339 0 323 1 0 1 1 0 8 0 amappl2 88 680 0 638 2 1 1 2 0 8 0 amappl1 80 94774 0 94306 15 4 11 13 0 8 0 amappl 88 64391 0 64242 7 2 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 61 0 4 2 0 2 2 0 8 0 uaddrrnd 24 5640 0 5620 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5640 0 5620 1 0 1 1 0 8 0 vmmpekpl 168 30801 0 30761 3 0 3 3 0 8 0 vmmpepl 168 492348 0 490828 107 28 79 88 0 357 1 vmsppl 368 5639 0 5620 6 3 3 3 0 8 0 rwobjpl 56 115109 0 108151 105 6 99 102 0 8 0 pdppl 4096 11288 0 11240 81 27 54 62 0 8 6 pvpl 32 2991470 0 2980389 343 205 138 241 0 265 19 pmappl 248 5639 0 5620 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 868 0 61 24 0 24 24 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(4086331,1,2000,ffff800021254fc0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff80002124a1b8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806e3bc658,1,fffffd807f7d74e0,ffff800021254fc0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff80002124a408,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021254fc0,ffffff9c,20000240,0,0,ffff80002124a5f0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff80002124a660) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002124a660) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb9bf007edf0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5