login: uvm_fault(0xfffffd80664e88b0, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *221302 83577 0 0 0x4000000 0K syz-executor.0 321231 63198 0 0x14000 0x200 1 reaper pppacopen(86338,1,2000,ffff800027af5508) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000236de298) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8067892310,1,fffffd807f7d7240,ffff800027af5508) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000236de4e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af5508,ffffff9c,20000200,0,0,ffff8000236de6d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000236de740) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000236de740) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27bab02d560, 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(0xfffffd80664e88b0, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(86338,1,2000,ffff800027af5508) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000236de298) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8067892310,1,fffffd807f7d7240,ffff800027af5508) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000236de4e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af5508,ffffff9c,20000200,0,0,ffff8000236de6d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000236de740) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000236de740) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27bab02d560, count: -7 ddb{0}> show registers rdi 0xffff800021277000 rsi 0x97e rbp 0xffff8000236de210 rbx 0 rdx 0xffff800021277000 rcx 0x97d rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7240 r10 0x5c9ca9c1c2bb1825 r11 0x72cb542255777f91 r12 0xfffffd8067892310 r13 0 r14 0x86338 acpi_pdirpa+0x721a0 r15 0xffff8000236de298 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000236de1c0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.0) pid=221302 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800027af5268,0xffff800027af4558 process=0xffff8000ffffa998 user=0xffff8000236d9000, vmspace=0xfffffd80664e88b0 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45559 295701 29727 0 2 0 syz-executor.1 82315 216664 11529 0 2 0 syz-executor.2 82315 262447 11529 0 3 0x4000080 fsleep syz-executor.2 83577 47647 39243 0 2 0 syz-executor.0 *83577 221302 39243 0 7 0x4000000 syz-executor.0 11529 310730 12288 0 3 0x82 nanoslp syz-executor.2 25248 327026 12288 0 3 0x82 nanoslp syz-executor.3 29727 373805 12288 0 3 0x82 nanoslp syz-executor.1 39243 86879 12288 0 3 0x82 nanoslp syz-executor.0 12288 59241 2017 0 3 0x82 thrsleep syz-fuzzer 12288 400668 2017 0 2 0x4000482 syz-fuzzer 12288 391382 2017 0 3 0x4000082 thrsleep syz-fuzzer 12288 303359 2017 0 3 0x4000082 thrsleep syz-fuzzer 12288 433517 2017 0 3 0x4000082 thrsleep syz-fuzzer 12288 325623 2017 0 3 0x4000082 kqread syz-fuzzer 12288 442114 2017 0 3 0x4000082 thrsleep syz-fuzzer 12288 386793 2017 0 3 0x4000082 thrsleep syz-fuzzer 2017 157555 55599 0 3 0x10008a sigsusp ksh 55599 406052 18845 0 3 0x9a poll sshd 38577 491024 1 0 3 0x100083 ttyin getty 18845 418387 1 0 3 0x88 poll sshd 21850 43394 41203 74 3 0x100092 bpf pflogd 41203 10000 1 0 3 0x80 netio pflogd 53216 97498 81601 73 3 0x100090 kqread syslogd 81601 346468 1 0 3 0x100082 netio syslogd 70928 338948 1 0 3 0x100080 kqread resolvd 57122 461929 66757 77 3 0x100092 kqread dhcpleased 46115 422658 66757 77 3 0x100092 kqread dhcpleased 66757 267977 1 0 3 0x80 kqread dhcpleased 43553 495465 0 0 2 0x14200 smr 55129 235713 0 0 2 0x14200 zerothread 87260 233274 0 0 3 0x14200 aiodoned aiodoned 91913 465939 0 0 3 0x14200 syncer update 28427 161314 0 0 3 0x14200 cleaner cleaner 63198 321231 0 0 7 0x14200 reaper 15738 334797 0 0 3 0x14200 pgdaemon pagedaemon 38035 445296 0 0 3 0x14200 bored viomb 16888 482293 0 0 3 0x40014200 acpi0 acpi0 95231 382703 0 0 3 0x40014200 idle1 61220 123213 0 0 3 0x14200 bored softnet 86942 447480 0 0 3 0x14200 bored systqmp 572 330354 0 0 3 0x14200 bored systq 37442 128974 0 0 3 0x40014200 bored softclock 19300 326226 0 0 3 0x40014200 idle0 1 373365 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800715e2f8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_page_remove+0x44 sys/arch/amd64/amd64/pmap.c:1912 #4 uvm_anfree_list+0x98 #5 amap_wipeout+0x1b1 sys/uvm/uvm_amap.c:504 #6 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #7 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #8 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #9 reaper+0x18b sys/kern/kern_exit.c:462 #10 proc_trampoline+0x1c Process 83577 (syz-executor.0) thread 0xffff800027af5508 (221302) 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 Process 63198 (reaper) thread 0xffff8000211497a0 (321231) uvm_fault(0xfffffd80664e88b0, 0x2200000022, 0, 1) -> e kernel: page fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10168 6539K 6676K 78643K 11468 0 pcb 13 8K 8K 78643K 44 0 rtable 150 4K 4K 78643K 245 0 ifaddr 59 13K 14K 78643K 87 0 counters 48 34K 34K 78643K 58 0 ioctlops 0 0K 4K 78643K 1492 0 iov 0 0K 12K 78643K 4 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1235 78K 78K 78643K 1308 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 11 0K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 49K 78643K 273 0 sigio 0 0K 0K 78643K 1 0 proc 68 87K 124K 78643K 396 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 16 0 in_multi 55 3K 4K 78643K 79 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 453 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 241 62K 62K 78643K 4668 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 21 0 NDP 8 0K 1K 78643K 21 0 temp 61 4188K 4252K 78643K 4134 0 kqueue 10 14K 16K 78643K 29 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 40 0 37 1 0 1 1 0 8 0 rtentry 112 68 0 2 2 0 2 2 0 8 0 unpcb 136 66 0 51 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1021 0 1021 1 0 1 1 0 8 1 tcpcb 736 47 0 42 2 0 2 2 0 8 1 arp 120 10 0 0 1 0 1 1 0 8 0 inpcb 304 157 0 150 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 12 0 0 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 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 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 2 0 2 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 20 0 2 1 0 1 1 0 8 0 pfstkey 112 21 0 3 1 0 1 1 0 8 0 pfstate 320 20 0 2 2 0 2 2 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 276 0 0 18 0 18 18 0 8 0 art_table 32 277 0 0 3 0 3 3 0 8 0 art_node 16 67 0 7 1 0 1 1 0 8 0 semupl 112 7 0 7 1 0 1 1 0 8 1 semapl 112 12 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1698 0 283 89 0 89 89 0 8 0 ffsino 272 1698 0 283 95 0 95 95 0 8 0 nchpl 144 2164 0 539 61 0 61 61 0 8 0 uvmvnodes 80 1809 0 0 37 0 37 37 0 8 0 vnodes 224 1809 0 0 107 0 107 107 0 8 0 namei 1024 6032 0 6032 1 0 1 1 0 8 1 percpumem 16 41 0 5 1 0 1 1 0 8 0 vcpupl 2048 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 216 6323 0 6323 3 1 2 2 0 8 2 plimitpl 152 30 0 19 1 0 1 1 0 8 0 sigapl 424 511 0 475 5 0 5 5 0 8 0 futexpl 64 1315 0 1314 1 0 1 1 0 8 0 knotepl 112 66 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 14 1 0 1 1 0 8 0 pipepl 336 93 0 77 2 0 2 2 0 8 0 fdescpl 496 497 0 475 4 0 4 4 0 8 1 filepl 152 1876 0 1725 7 0 7 7 0 8 1 lockfpl 104 28 0 26 1 0 1 1 0 8 0 lockfspl 48 15 0 13 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 96 143 0 131 1 0 1 1 0 8 0 zombiepl 144 475 0 474 1 0 1 1 0 8 0 processpl 1064 511 0 474 3 0 3 3 0 8 0 procpl 672 737 0 691 5 0 5 5 0 8 0 sockpl 480 264 0 239 5 0 5 5 0 8 1 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 246 0 0 30 0 30 30 0 8 0 mtagpl 96 24 0 0 1 0 1 1 0 8 0 mbufpl 256 326 0 0 20 0 20 20 0 8 0 bufpl 288 3832 0 144 264 0 264 264 0 8 0 anonpl 24 105922 0 91360 95 4 91 91 0 186 1 amapchunkpl 152 10957 0 10294 35 1 34 34 0 158 2 amappl16 200 1077 0 659 24 0 24 24 0 8 0 amappl15 192 52 0 50 1 0 1 1 0 8 0 amappl14 184 65 0 61 1 0 1 1 0 8 0 amappl13 176 42 0 41 1 0 1 1 0 8 0 amappl12 168 17 0 15 1 0 1 1 0 8 0 amappl11 160 155 0 138 1 0 1 1 0 8 0 amappl10 152 50 0 40 1 0 1 1 0 8 0 amappl9 144 481 0 478 1 0 1 1 0 8 0 amappl8 136 374 0 338 2 0 2 2 0 8 0 amappl7 128 79 0 68 1 0 1 1 0 8 0 amappl6 120 159 0 142 1 0 1 1 0 8 0 amappl5 112 323 0 304 1 0 1 1 0 8 0 amappl4 104 754 0 727 1 0 1 1 0 8 0 amappl3 96 169 0 150 1 0 1 1 0 8 0 amappl2 88 371 0 331 2 0 2 2 0 8 0 amappl1 80 11811 0 11328 13 1 12 13 0 8 1 amappl 88 4325 0 4140 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 498 0 475 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 498 0 475 1 0 1 1 0 8 0 vmmpekpl 168 7320 0 7284 2 0 2 2 0 8 0 vmmpepl 168 48141 0 46229 126 0 126 126 0 357 40 vmsppl 368 497 0 474 3 0 3 3 0 8 0 rwobjpl 56 14430 0 11376 44 0 44 44 0 8 0 pdppl 4096 1004 0 949 75 20 55 62 0 8 0 pvpl 32 266910 0 248855 160 2 158 158 0 265 9 pmappl 248 497 0 474 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 611 0 23 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(86338,1,2000,ffff800027af5508) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000236de298) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8067892310,1,fffffd807f7d7240,ffff800027af5508) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000236de4e8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af5508,ffffff9c,20000200,0,0,ffff8000236de6d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000236de740) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000236de740) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x27bab02d560, 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211850b0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd80664e8b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd80664e8b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000211497a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 7 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211850b0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd80664e8b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd80664e8b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff8000211497a0) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -8