uvm_fault(0xfffffd8067a45740, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND 277946 53211 0 0 0 0 syz-executor.0 *406918 53211 0 0 0x4000000 1K syz-executor.0 pppacopen(40646316,1,2000,ffff800021242008) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b06718) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80735e6408,1,fffffd807f7d7420,ffff800021242008) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b06968,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021242008,ffffff9c,20000040,0,0,ffff800027b06b50) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b06bc0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b06bc0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d0306a8150, 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(0xfffffd8067a45740, 0x668, 0, 2) -> e ddb{1}> trace pppacopen(40646316,1,2000,ffff800021242008) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b06718) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80735e6408,1,fffffd807f7d7420,ffff800021242008) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b06968,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021242008,ffffff9c,20000040,0,0,ffff800027b06b50) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b06bc0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b06bc0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d0306a8150, count: -7 ddb{1}> show registers rdi 0xffff80002127b000 rsi 0x973 rbp 0xffff800027b06690 rbx 0 rdx 0xffff80002127b000 rcx 0x972 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7420 r10 0xed20dd7aba67f740 r11 0xa32b306ea71b13c1 r12 0xfffffd80735e6408 r13 0 r14 0x40646316 r15 0xffff800027b06718 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027b06640 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{1}> show proc PROC (syz-executor.0) pid=406918 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff8000212422a8,0xffffffff8293ceb0 process=0xffff8000ffff8008 user=0xffff800027b01000, vmspace=0xfffffd8067a45740 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 99818 11760 26403 0 2 0 syz-executor.2 81451 180666 4136 0 2 0 syz-executor.1 81451 404302 4136 0 3 0x4000080 nanoslp syz-executor.1 53211 277946 76475 0 7 0 syz-executor.0 *53211 406918 76475 0 7 0x4000000 syz-executor.0 57384 221130 73965 0 2 0x10 syz-executor.3 57384 511273 73965 0 3 0x4000090 fsleep syz-executor.3 26228 319836 0 0 3 0x14200 bored sosplice 73965 419305 86603 0 3 0x82 nanoslp syz-executor.3 26403 169046 86603 0 3 0x82 nanoslp syz-executor.2 4136 19720 86603 0 3 0x82 nanoslp syz-executor.1 76475 420783 86603 0 3 0x82 nanoslp syz-executor.0 86603 367039 21328 0 3 0x82 thrsleep syz-fuzzer 86603 320848 21328 0 3 0x4000082 thrsleep syz-fuzzer 86603 417266 21328 0 3 0x4000082 thrsleep syz-fuzzer 86603 106379 21328 0 3 0x4000082 thrsleep syz-fuzzer 86603 191799 21328 0 3 0x4000082 kqread syz-fuzzer 86603 306162 21328 0 3 0x4000082 thrsleep syz-fuzzer 86603 258852 21328 0 3 0x4000082 thrsleep syz-fuzzer 86603 31550 21328 0 3 0x4000082 thrsleep syz-fuzzer 21328 468869 50527 0 3 0x10008a sigsusp ksh 50527 362191 66491 0 3 0x9a poll sshd 51236 332785 1 0 3 0x100083 ttyin getty 66491 381740 1 0 3 0x88 poll sshd 75589 66364 78640 74 3 0x100092 bpf pflogd 78640 71162 1 0 3 0x80 netio pflogd 14642 195762 31572 73 3 0x100090 kqread syslogd 31572 184922 1 0 3 0x100082 netio syslogd 69512 289024 1 0 3 0x100080 kqread resolvd 84897 75763 71379 77 3 0x100092 kqread dhcpleased 31145 411541 71379 77 3 0x100092 kqread dhcpleased 71379 377719 1 0 3 0x80 kqread dhcpleased 75556 493721 0 0 3 0x14200 bored smr 21233 49870 0 0 2 0x14200 zerothread 52932 494412 0 0 3 0x14200 aiodoned aiodoned 39119 172483 0 0 3 0x14200 syncer update 544 72679 0 0 3 0x14200 cleaner cleaner 83619 245959 0 0 3 0x14200 reaper reaper 82638 273620 0 0 3 0x14200 pgdaemon pagedaemon 89487 163301 0 0 3 0x14200 bored viomb 58069 504635 0 0 3 0x40014200 acpi0 acpi0 67276 133454 0 0 3 0x40014200 idle1 69683 66513 0 0 3 0x14200 bored softnet 41393 96685 0 0 3 0x14200 bored systqmp 15602 513606 0 0 3 0x14200 bored systq 62678 456139 0 0 3 0x40014200 bored softclock 88694 190451 0 0 3 0x40014200 idle0 1 99229 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 53211 (syz-executor.0) thread 0xffff800021242008 (406918) 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 10167 6531K 6723K 78643K 11448 0 pcb 13 8K 8K 78643K 28 0 rtable 154 5K 7K 78643K 297 0 ifaddr 60 13K 14K 78643K 75 0 counters 48 34K 34K 78643K 48 0 ioctlops 0 0K 4K 78643K 1503 0 iov 0 0K 4K 78643K 3 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1233 78K 78K 78643K 1289 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 6 0K 0K 78643K 7 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 10 33K 49K 78643K 319 0 proc 69 87K 111K 78643K 404 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 21 0 in_multi 55 3K 3K 78643K 63 0 ether_multi 1 0K 0K 78643K 6 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 450 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 250 46K 50K 78643K 5201 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 23 0 NDP 8 0K 1K 78643K 16 0 temp 59 4193K 4257K 78643K 4279 0 kqueue 10 14K 16K 78643K 22 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 34 0 31 1 0 1 1 0 8 0 rtentry 112 68 0 2 2 0 2 2 0 8 0 unpcb 136 65 0 50 1 0 1 1 0 8 0 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpqe 32 38 0 38 1 1 0 1 0 8 0 tcpcb 736 39 0 32 2 1 1 2 0 8 0 arp 120 10 0 0 1 0 1 1 0 8 0 inpcb 304 123 0 116 1 0 1 1 0 8 0 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 12 0 0 1 0 1 1 0 8 0 kcovpl 48 4 0 0 1 0 1 1 0 8 0 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 1 1 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 19 0 19 2 1 1 1 0 8 1 pftag 88 2 0 1 1 0 1 1 0 8 0 pfqueue 264 1 0 1 1 0 1 1 0 8 1 pfstitem 24 19 0 0 1 0 1 1 0 8 0 pfstkey 112 21 0 2 1 0 1 1 0 8 0 pfstate 320 20 0 1 2 0 2 2 0 8 0 pfrule 1360 39 0 33 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 277 0 0 18 0 18 18 0 8 0 art_table 32 278 0 0 3 0 3 3 0 8 0 art_node 16 67 0 7 1 0 1 1 0 8 0 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1766 0 353 89 0 89 89 0 8 0 ffsino 272 1766 0 353 95 0 95 95 0 8 0 nchpl 144 2263 0 638 61 0 61 61 0 8 0 uvmvnodes 80 1869 0 0 39 0 39 39 0 8 0 vnodes 224 1869 0 0 110 0 110 110 0 8 0 namei 1024 6371 0 6371 2 1 1 1 0 8 1 percpumem 16 36 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 6 0 6 2 1 1 1 0 8 1 scxspl 216 6897 0 6897 9 8 1 7 0 8 1 plimitpl 152 25 0 14 1 0 1 1 0 8 0 sigapl 424 559 0 521 5 0 5 5 0 8 0 futexpl 64 1220 0 1219 1 0 1 1 0 8 0 knotepl 112 67 0 0 2 0 2 2 0 8 0 kqueuepl 216 44 0 38 1 0 1 1 0 8 0 pipepl 336 99 0 83 2 0 2 2 0 8 0 fdescpl 496 543 0 520 4 1 3 4 0 8 0 filepl 152 1942 0 1791 8 1 7 7 0 8 1 lockfpl 104 26 0 24 1 0 1 1 0 8 0 lockfspl 48 12 0 10 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 96 150 0 137 1 0 1 1 0 8 0 zombiepl 144 521 0 521 2 1 1 1 0 8 1 processpl 1064 559 0 521 3 0 3 3 0 8 0 procpl 672 835 0 787 5 0 5 5 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 480 222 0 197 4 0 4 4 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 161 0 0 20 0 20 20 0 8 0 mtagpl 96 28 0 0 1 0 1 1 0 8 0 mbufpl 256 319 0 0 20 0 20 20 0 8 0 bufpl 288 3856 0 139 266 0 266 266 0 8 0 anonpl 24 120749 0 105836 120 6 114 114 0 186 21 amapchunkpl 152 12450 0 11763 31 0 31 31 0 158 0 amappl16 200 1378 0 930 36 0 36 36 0 8 11 amappl15 192 67 0 66 1 0 1 1 0 8 0 amappl14 184 6 0 5 2 1 1 1 0 8 0 amappl13 176 113 0 107 1 0 1 1 0 8 0 amappl12 168 14 0 13 1 0 1 1 0 8 0 amappl11 160 113 0 96 1 0 1 1 0 8 0 amappl10 152 124 0 113 1 0 1 1 0 8 0 amappl9 144 478 0 476 1 0 1 1 0 8 0 amappl8 136 376 0 337 2 0 2 2 0 8 0 amappl7 128 78 0 68 1 0 1 1 0 8 0 amappl6 120 152 0 135 1 0 1 1 0 8 0 amappl5 112 423 0 402 1 0 1 1 0 8 0 amappl4 104 663 0 639 1 0 1 1 0 8 0 amappl3 96 226 0 205 1 0 1 1 0 8 0 amappl2 88 430 0 388 2 1 1 2 0 8 0 amappl1 80 12382 0 11872 13 1 12 13 0 8 0 amappl 88 4859 0 4663 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 543 0 520 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 543 0 520 1 0 1 1 0 8 0 vmmpekpl 168 7617 0 7579 2 0 2 2 0 8 0 vmmpepl 168 52343 0 50310 109 11 98 100 0 357 9 vmsppl 368 542 0 520 3 0 3 3 0 8 0 rwobjpl 56 15459 0 12297 47 0 47 47 0 8 2 pdppl 4096 1094 0 1040 70 16 54 62 0 8 0 pvpl 32 296135 0 277524 190 4 186 186 0 265 35 pmappl 248 542 0 520 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 598 0 21 17 0 17 17 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffde800, count: 9 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffde800, count: -6 ddb{0}> machine ddbcpu 1 Stopped at pppacopen+0x1b5: movq %r13,0x668 pppacopen(40646316,1,2000,ffff800021242008) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b06718) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80735e6408,1,fffffd807f7d7420,ffff800021242008) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b06968,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021242008,ffffff9c,20000040,0,0,ffff800027b06b50) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b06bc0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b06bc0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d0306a8150, count: 8 ddb{1}> trace pppacopen(40646316,1,2000,ffff800021242008) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027b06718) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80735e6408,1,fffffd807f7d7420,ffff800021242008) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027b06968,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021242008,ffffff9c,20000040,0,0,ffff800027b06b50) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027b06bc0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027b06bc0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4d0306a8150, count: -7