uvm_fault(0xfffffd807511cd18, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND 519039 47339 0 0 0 0 syz-executor.2 *119603 47339 0 0 0x4000000 1K syz-executor.2 pppacopen(86353,1,2000,ffff800022ca8548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027ba7498) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806ec4d3e8,1,fffffd807f7d7720,ffff800022ca8548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027ba76e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800022ca8548,ffffff9c,20000780,0,0,ffff800027ba78d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027ba7940) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ba7940) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x481f186c3a0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd807511cd18, 0x668, 0, 2) -> e ddb{1}> trace pppacopen(86353,1,2000,ffff800022ca8548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027ba7498) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806ec4d3e8,1,fffffd807f7d7720,ffff800022ca8548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027ba76e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800022ca8548,ffffff9c,20000780,0,0,ffff800027ba78d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027ba7940) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ba7940) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x481f186c3a0, count: -7 ddb{1}> show registers rdi 0xffff8000246e6000 rsi 0x81e rbp 0xffff800027ba7410 rbx 0 rdx 0xffff8000246e6000 rcx 0x81d rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7720 r10 0x4c47dc3f7d191933 r11 0x269e637848f9fcf5 r12 0xfffffd806ec4d3e8 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff800027ba7498 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027ba73c0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{1}> show proc PROC (syz-executor.2) pid=119603 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800022ca87e8,0xffffffff8293ceb0 process=0xffff800027b529a8 user=0xffff800027ba2000, vmspace=0xfffffd807511cd18 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47339 519039 25809 0 7 0 syz-executor.2 *47339 119603 25809 0 7 0x4000000 syz-executor.2 63572 139503 44727 0 3 0x80 nanoslp syz-executor.3 63572 415693 44727 0 3 0x4000080 rest syz-executor.3 1632 100150 0 0 3 0x14280 nfsidl nfsio 95902 53055 0 0 3 0x14280 nfsidl nfsio 92863 16086 0 0 3 0x14280 nfsidl nfsio 56441 253944 0 0 3 0x14280 nfsidl nfsio 38828 348627 0 0 3 0x14280 nfsidl nfsio 75613 464409 0 0 3 0x14280 nfsidl nfsio 7386 283794 0 0 3 0x14280 nfsidl nfsio 83629 311174 0 0 3 0x14280 nfsidl nfsio 63184 55101 0 0 3 0x14280 nfsidl nfsio 91427 194516 0 0 3 0x14280 nfsidl nfsio 33003 78769 0 0 3 0x14280 nfsidl nfsio 69682 143719 0 0 3 0x14280 nfsidl nfsio 83869 309508 0 0 3 0x14280 nfsidl nfsio 90171 395971 0 0 3 0x14280 nfsidl nfsio 22840 179713 0 0 3 0x14280 nfsidl nfsio 11670 336384 0 0 3 0x14280 nfsidl nfsio 18914 304997 0 0 3 0x14280 nfsidl nfsio 65666 207450 0 0 3 0x14280 nfsidl nfsio 1313 75325 0 0 3 0x14280 nfsidl nfsio 48894 439889 0 0 3 0x14280 nfsidl nfsio 87236 130353 0 0 3 0x14200 bored sosplice 44727 350457 33567 0 3 0x82 nanoslp syz-executor.3 25809 516446 33567 0 3 0x82 nanoslp syz-executor.2 4305 201305 33567 0 3 0x82 piperd syz-executor.1 75023 143442 33567 0 3 0x82 piperd syz-executor.0 33567 459237 25512 0 3 0x82 thrsleep syz-fuzzer 33567 337231 25512 0 3 0x4000082 nanoslp syz-fuzzer 33567 422833 25512 0 3 0x4000082 thrsleep syz-fuzzer 33567 121903 25512 0 3 0x4000082 kqread syz-fuzzer 33567 315546 25512 0 3 0x4000082 thrsleep syz-fuzzer 33567 443015 25512 0 3 0x4000082 thrsleep syz-fuzzer 33567 350570 25512 0 3 0x4000082 thrsleep syz-fuzzer 33567 14933 25512 0 3 0x4000082 thrsleep syz-fuzzer 25512 501209 5313 0 3 0x10008a sigsusp ksh 5313 222536 47619 0 3 0x9a poll sshd 13666 491472 1 0 3 0x100083 ttyopn getty 47619 388532 1 0 3 0x88 poll sshd 53838 467129 41785 74 3 0x100092 bpf pflogd 41785 162711 1 0 3 0x80 netio pflogd 7116 31665 10354 73 3 0x100090 kqread syslogd 10354 522459 1 0 3 0x100082 netio syslogd 3730 71999 1 0 3 0x100080 kqread resolvd 31791 207605 31346 77 3 0x100092 kqread dhcpleased 36197 26344 31346 77 3 0x100092 kqread dhcpleased 31346 21422 1 0 3 0x80 kqread dhcpleased 29178 263226 0 0 3 0x14200 bored smr 46160 77870 0 0 3 0x14200 pgzero zerothread 15141 50527 0 0 3 0x14200 aiodoned aiodoned 29965 205664 0 0 3 0x14200 syncer update 54100 387190 0 0 3 0x14200 cleaner cleaner 82413 365656 0 0 3 0x14200 reaper reaper 45928 135335 0 0 3 0x14200 pgdaemon pagedaemon 40856 130883 0 0 3 0x14200 bored viomb 63180 81613 0 0 3 0x40014200 acpi0 acpi0 2706 245922 0 0 3 0x40014200 idle1 91692 317139 0 0 3 0x14200 bored softnet 69698 497086 0 0 3 0x14200 bored systqmp 13466 65444 0 0 3 0x14200 bored systq 51059 327981 0 0 3 0x40014200 bored softclock 89910 156235 0 0 3 0x40014200 idle0 1 99011 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 47339 (syz-executor.2) thread 0xffff800022ca8548 (119603) 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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10173 6547K 7506K 78643K 14636 0 pcb 13 8K 8K 78643K 197 0 rtable 145 5K 8K 78643K 899 0 ifaddr 58 13K 14K 78643K 314 0 counters 48 34K 34K 78643K 64 0 ioctlops 0 0K 4K 78643K 1761 0 iov 0 0K 12K 78643K 74 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1232 77K 78K 78643K 2640 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 31 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 312 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 49K 78643K 3780 0 sigio 0 0K 0K 78643K 27 0 proc 70 87K 111K 78643K 575 0 subproc 52 3K 3K 78643K 52 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 199 0 in_multi 43 3K 3K 78643K 191 0 ether_multi 1 0K 0K 78643K 40 0 mrt 0 0K 0K 78643K 67 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 614 0 pfkey data 0 0K 0K 78643K 4 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 333 615K 616K 78643K 46102 0 UVM aobj 114 3K 3K 78643K 114 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 219 0 NDP 8 0K 1K 78643K 36 0 temp 104 4209K 4274K 78643K 27916 0 kqueue 10 14K 22K 78643K 164 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 106 0 103 1 0 1 1 0 8 0 rtentry 112 146 0 87 2 0 2 2 0 8 0 unpcb 136 893 0 878 2 1 1 2 0 8 0 syncache 296 79 0 79 9 9 0 1 0 8 0 tcpqe 32 14 0 14 2 2 0 1 0 8 0 tcpcb 736 758 0 754 21 19 2 7 0 8 1 arp 120 15 0 4 1 0 1 1 0 8 0 inpcb 304 1561 0 1549 5 3 2 2 0 8 0 rttmr 72 29 0 29 3 3 0 1 0 8 0 nd6 48 25 0 18 1 0 1 1 0 8 0 pkpcb 40 11 0 11 2 2 0 1 0 8 0 kcovpl 48 4 0 0 1 0 1 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 15 0 15 2 2 0 1 0 482 0 pffrnode 88 15 0 15 2 2 0 1 0 8 0 pffrent 40 369 0 369 2 2 0 1 0 8 0 pfosfp 40 1441 0 1017 5 0 5 5 0 8 0 pfosfpen 112 1441 0 726 21 0 21 21 0 8 0 pfrktable 1344 216 0 214 3 2 1 1 0 8 0 pfstitem 24 14 0 12 1 0 1 1 0 8 0 pfstkey 112 30 0 28 1 0 1 1 0 8 0 pfstate 320 22 0 20 1 0 1 1 0 8 0 pfsrctr 152 201 0 196 4 3 1 2 0 8 0 pfrule 1360 181 0 163 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 500 0 254 18 2 16 18 0 8 0 art_table 32 501 0 254 3 0 3 3 0 8 0 art_node 16 145 0 89 1 0 1 1 0 8 0 sysvmsgpl 40 35 0 23 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 310 0 300 1 0 1 1 0 8 0 shmpl 112 111 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6882 0 5470 90 0 90 90 0 8 0 ffsino 272 6882 0 5470 97 1 96 96 0 8 0 nchpl 144 11458 0 9845 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 28919 0 28919 1 0 1 1 0 8 1 percpumem 16 44 0 8 1 0 1 1 0 8 0 vcpupl 2048 35 0 0 5 0 5 5 0 8 0 vmpool 560 35 0 0 3 0 3 3 0 8 0 pfiaddrpl 120 61 0 57 3 2 1 1 0 8 0 scsiplug 72 7 0 7 1 1 0 1 0 8 0 scxspl 216 33355 0 33355 9 8 1 7 0 8 1 plimitpl 152 157 0 146 1 0 1 1 0 8 0 sigapl 424 4039 0 3983 7 0 7 7 0 8 0 futexpl 64 24114 0 24114 1 0 1 1 0 8 1 knotepl 112 88 0 0 3 0 3 3 0 8 0 kqueuepl 216 351 0 345 1 0 1 1 0 8 0 pipepl 336 284 0 268 2 0 2 2 0 8 0 fdescpl 496 4004 0 3983 4 1 3 4 0 8 0 filepl 152 12459 0 12307 7 0 7 7 0 8 1 lockfpl 104 611 0 609 1 0 1 1 0 8 0 lockfspl 48 233 0 231 1 0 1 1 0 8 0 sessionpl 144 20 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 7 1 0 1 1 0 8 0 ucredpl 96 1707 0 1693 1 0 1 1 0 8 0 zombiepl 144 3983 0 3983 1 0 1 1 0 8 1 processpl 1064 4039 0 3983 4 0 4 4 0 8 0 procpl 672 8113 0 8048 8 1 7 7 0 8 1 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 57 0 57 4 4 0 1 0 8 0 sockpl 480 2596 0 2571 10 6 4 5 0 8 0 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 24 0 0 2 0 2 2 0 8 0 mcl9k 9216 4 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 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 209 0 0 14 1 13 14 0 8 0 mtagpl 96 362 0 0 9 0 9 9 0 8 0 mbufpl 256 1093 0 0 63 0 63 63 0 8 0 bufpl 288 8531 0 2186 454 0 454 454 0 8 0 anonpl 24 991235 0 983557 70 20 50 60 0 186 0 amapchunkpl 152 110452 0 109971 53 32 21 48 0 158 1 amappl16 200 8337 0 8149 20 9 11 16 0 8 0 amappl15 192 897 0 897 1 0 1 1 0 8 1 amappl14 184 10 0 5 1 0 1 1 0 8 0 amappl13 176 42 0 40 1 0 1 1 0 8 0 amappl12 168 990 0 986 1 0 1 1 0 8 0 amappl11 160 51 0 35 1 0 1 1 0 8 0 amappl10 152 970 0 958 1 0 1 1 0 8 0 amappl9 144 476 0 474 1 0 1 1 0 8 0 amappl8 136 1395 0 1338 3 0 3 3 0 8 0 amappl7 128 1030 0 1019 1 0 1 1 0 8 0 amappl6 120 160 0 143 1 0 1 1 0 8 0 amappl5 112 3866 0 3846 1 0 1 1 0 8 0 amappl4 104 630 0 609 1 0 1 1 0 8 0 amappl3 96 1285 0 1267 1 0 1 1 0 8 0 amappl2 88 1379 0 1337 2 1 1 2 0 8 0 amappl1 80 67339 0 66854 13 1 12 13 0 8 0 amappl 88 45558 0 45369 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 72 113 0 0 3 0 3 3 0 8 0 uaddrrnd 24 4039 0 3983 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4039 0 3983 1 0 1 1 0 8 0 vmmpekpl 168 23376 0 23340 2 0 2 2 0 8 0 vmmpepl 168 349541 0 347876 94 13 81 85 0 357 1 vmsppl 368 4038 0 3983 6 0 6 6 0 8 0 rwobjpl 56 81435 0 74346 104 3 101 102 0 8 0 pdppl 4096 8086 0 8001 109 20 89 89 0 8 4 pvpl 32 1919228 0 1907883 191 85 106 141 0 265 7 pmappl 248 4038 0 3983 4 0 4 4 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 900 0 45 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82779ff0) 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 end of kernel end trace frame: 0x7f7ffffe5020, count: 12 ddb{0}> trace x86_ipi_db(ffffffff82779ff0) 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 end of kernel end trace frame: 0x7f7ffffe5020, count: -3 ddb{0}> machine ddbcpu 1 Stopped at pppacopen+0x1b5: movq %r13,0x668 pppacopen(86353,1,2000,ffff800022ca8548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027ba7498) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806ec4d3e8,1,fffffd807f7d7720,ffff800022ca8548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027ba76e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800022ca8548,ffffff9c,20000780,0,0,ffff800027ba78d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027ba7940) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ba7940) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x481f186c3a0, count: 8 ddb{1}> trace pppacopen(86353,1,2000,ffff800022ca8548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027ba7498) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806ec4d3e8,1,fffffd807f7d7720,ffff800022ca8548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027ba76e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800022ca8548,ffffff9c,20000780,0,0,ffff800027ba78d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027ba7940) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027ba7940) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x481f186c3a0, count: -7