uvm_fault(0xfffffd8068bcf460, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *267573 52711 0 0 0x4000000 0K syz-executor.3 245268 63737 0 0x14000 0x200 1 reaper pppacopen(408633c,1,2000,ffff800021237260) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260e4028) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806877d1c8,1,fffffd807f7d78a0,ffff800021237260) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260e4278,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021237260,ffffff9c,20000040,0,0,ffff8000260e4460) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260e44d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260e44d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x93c013744e0, 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(0xfffffd8068bcf460, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(408633c,1,2000,ffff800021237260) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260e4028) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806877d1c8,1,fffffd807f7d78a0,ffff800021237260) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260e4278,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021237260,ffffff9c,20000040,0,0,ffff8000260e4460) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260e44d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260e44d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x93c013744e0, count: -7 ddb{0}> show registers rdi 0xffff800027b05000 rsi 0x968 rbp 0xffff8000260e3fa0 rbx 0 rdx 0xffff800027b05000 rcx 0x967 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d78a0 r10 0xf331332932b05ea6 r11 0x2e7d67a6ab5b0e02 r12 0xfffffd806877d1c8 r13 0 r14 0x408633c __kernel_phys_end+0x148633c r15 0xffff8000260e4028 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000260e3f50 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.3) pid=267573 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212367e0,0xffffffff8293ceb0 process=0xffff8000211f0438 user=0xffff8000260df000, vmspace=0xfffffd8068bcf460 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52711 367275 61252 0 2 0 syz-executor.3 *52711 267573 61252 0 7 0x4000000 syz-executor.3 61252 80192 7582 0 3 0x82 nanoslp syz-executor.3 51772 373303 7582 0 3 0x82 nanoslp syz-executor.1 32555 187595 7582 0 3 0x82 nanoslp syz-executor.2 30615 406533 0 0 3 0x14200 bored sosplice 51570 388070 7582 0 3 0x82 nanoslp syz-executor.0 7582 240502 33534 0 3 0x82 thrsleep syz-fuzzer 7582 415697 33534 0 3 0x4000082 thrsleep syz-fuzzer 7582 35445 33534 0 3 0x4000082 thrsleep syz-fuzzer 7582 164979 33534 0 3 0x4000082 thrsleep syz-fuzzer 7582 96114 33534 0 3 0x4000082 thrsleep syz-fuzzer 7582 135989 33534 0 3 0x4000082 kqread syz-fuzzer 7582 110801 33534 0 3 0x4000082 thrsleep syz-fuzzer 7582 407399 33534 0 3 0x4000082 thrsleep syz-fuzzer 33534 322620 92339 0 3 0x10008a sigsusp ksh 92339 196435 43551 0 3 0x9a poll sshd 96775 78071 1 0 3 0x100083 ttyin getty 43551 503076 1 0 3 0x88 poll sshd 17661 38139 56260 74 3 0x100092 bpf pflogd 56260 439933 1 0 3 0x80 netio pflogd 74725 436249 89624 73 3 0x100090 kqread syslogd 89624 181126 1 0 3 0x100082 netio syslogd 71722 419820 1 0 3 0x100080 kqread resolvd 79776 222366 210 77 3 0x100092 kqread dhcpleased 77019 17497 210 77 3 0x100092 kqread dhcpleased 210 261367 1 0 3 0x80 kqread dhcpleased 68807 190760 0 0 3 0x14200 pause smr 97682 520767 0 0 2 0x14200 zerothread 36996 315798 0 0 3 0x14200 aiodoned aiodoned 92163 439822 0 0 3 0x14200 syncer update 21147 129444 0 0 3 0x14200 cleaner cleaner 63737 245268 0 0 7 0x14200 reaper 86490 278703 0 0 3 0x14200 pgdaemon pagedaemon 88786 464494 0 0 3 0x14200 bored viomb 86305 9962 0 0 3 0x40014200 acpi0 acpi0 11355 147753 0 0 3 0x40014200 idle1 65946 217017 0 0 3 0x14200 bored softnet 35141 270186 0 0 3 0x14200 bored systqmp 92192 433194 0 0 3 0x14200 bored systq 23623 388535 0 0 3 0x40014200 bored softclock 22703 27500 0 0 3 0x40014200 idle0 1 59933 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex anonpl r = 0 (0xffffffff8293c220) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 amap_wipeout+0x1b1 sys/uvm/uvm_amap.c:504 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #8 reaper+0x18b sys/kern/kern_exit.c:462 #9 proc_trampoline+0x1c Process 52711 (syz-executor.3) thread 0xffff800021237260 (267573) 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 63737 (reaper) thread 0xffff8000211497a0 (245268) uvm_fault(0xfffffd8068bcf460, 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 10184 6666K 6923K 78643K 13375 0 pcb 13 8K 8K 78643K 100 0 rtable 158 5K 6K 78643K 510 0 ifaddr 62 13K 14K 78643K 174 0 counters 50 34K 35K 78643K 90 0 ioctlops 0 0K 4K 78643K 1544 0 iov 0 0K 16K 78643K 16 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1253 79K 79K 78643K 2057 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 1813 0 sigio 0 0K 0K 78643K 5 0 proc 70 87K 111K 78643K 638 0 subproc 52 3K 4K 78643K 130 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 116 0 in_multi 55 3K 3K 78643K 159 0 ether_multi 1 0K 0K 78643K 17 0 mrt 0 0K 0K 78643K 20 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 657 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 228 47K 63K 78643K 22322 0 UVM aobj 21 2K 2K 78643K 21 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 90 0 NDP 9 0K 1K 78643K 49 0 temp 72 4190K 4259K 78643K 19166 0 kqueue 10 14K 50K 78643K 170 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 120 176 0 173 1 0 1 1 0 8 0 rtentry 112 142 0 75 2 0 2 2 0 8 0 unpcb 136 409 0 394 1 0 1 1 0 8 0 syncache 296 29 0 29 5 5 0 1 0 8 0 tcpqe 32 236 0 236 2 2 0 1 0 8 0 tcpcb 736 292 0 268 10 7 3 3 0 8 0 arp 120 23 0 12 1 0 1 1 0 8 0 inpcb 304 760 0 752 4 3 1 2 0 8 0 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 30 0 18 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 10 0 6 1 0 1 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 3 1 0 1 1 0 482 1 pffrnode 88 3 0 3 1 0 1 1 0 8 1 pffrent 40 9 0 9 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 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfstitem 24 40 0 24 1 0 1 1 0 8 0 pfstkey 112 40 0 24 1 0 1 1 0 8 0 pfstate 320 39 0 23 3 0 3 3 0 8 0 pfrule 1360 55 0 46 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 544 0 264 20 2 18 18 0 8 0 art_table 32 545 0 264 3 0 3 3 0 8 0 art_node 16 137 0 76 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 20 2 1 1 1 0 8 0 semapl 112 10 0 0 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 3676 0 2257 90 1 89 90 0 8 0 ffsino 272 3676 0 2257 95 0 95 95 0 8 0 nchpl 144 5855 0 4250 61 0 61 61 0 8 0 uvmvnodes 80 4326 0 0 89 0 89 89 0 8 0 vnodes 224 4326 0 0 255 0 255 255 0 8 0 namei 1024 16123 0 16123 1 0 1 1 0 8 1 percpumem 16 57 0 20 1 0 1 1 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 17781 0 17781 10 9 1 8 0 8 1 plimitpl 152 89 0 78 1 0 1 1 0 8 0 sigapl 424 2038 0 2003 5 0 5 5 0 8 0 futexpl 64 10665 0 10665 1 0 1 1 0 8 1 knotepl 112 118 0 0 4 0 4 4 0 8 0 kqueuepl 216 196 0 190 2 1 1 2 0 8 0 pipepl 336 147 0 131 2 0 2 2 0 8 0 fdescpl 496 2019 0 1999 4 1 3 4 0 8 0 filepl 152 6706 0 6555 8 1 7 8 0 8 0 lockfpl 104 233 0 231 1 0 1 1 0 8 0 lockfspl 48 80 0 78 1 0 1 1 0 8 0 sessionpl 144 26 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 17 1 0 1 1 0 8 0 ucredpl 96 1061 0 1049 1 0 1 1 0 8 0 zombiepl 144 2003 0 2000 1 0 1 1 0 8 0 processpl 1064 2038 0 2000 3 0 3 3 0 8 0 procpl 672 3910 0 3862 5 0 5 5 0 8 0 srpgc 96 10 0 10 2 2 0 1 0 8 0 sosppl 168 19 0 19 1 1 0 1 0 8 0 sockpl 480 1363 0 1338 9 5 4 6 0 8 0 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 199 0 0 20 0 20 20 0 8 0 mtagpl 96 144 0 0 4 0 4 4 0 8 0 mbufpl 256 548 0 0 34 0 34 34 0 8 0 bufpl 288 6152 0 183 427 0 427 427 0 8 0 anonpl 24 498004 0 487065 103 30 73 97 0 186 0 amapchunkpl 152 53857 0 53289 41 16 25 38 0 158 1 amappl16 200 5047 0 4750 34 18 16 29 0 8 0 amappl15 192 970 0 969 1 0 1 1 0 8 0 amappl14 184 10 0 9 1 0 1 1 0 8 0 amappl13 176 345 0 341 1 0 1 1 0 8 0 amappl12 168 308 0 308 1 1 0 1 0 8 0 amappl11 160 166 0 150 1 0 1 1 0 8 0 amappl10 152 75 0 64 1 0 1 1 0 8 0 amappl9 144 259 0 257 1 0 1 1 0 8 0 amappl8 136 492 0 456 2 0 2 2 0 8 0 amappl7 128 124 0 113 1 0 1 1 0 8 0 amappl6 120 197 0 180 1 0 1 1 0 8 0 amappl5 112 1934 0 1915 1 0 1 1 0 8 0 amappl4 104 879 0 853 1 0 1 1 0 8 0 amappl3 96 529 0 511 1 0 1 1 0 8 0 amappl2 88 986 0 943 2 0 2 2 0 8 0 amappl1 80 36044 0 35551 13 1 12 13 0 8 0 amappl 88 21865 0 21694 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 2019 0 1998 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2019 0 1998 1 0 1 1 0 8 0 vmmpekpl 168 14301 0 14271 2 0 2 2 0 8 0 vmmpepl 168 180019 0 178281 110 27 83 94 0 357 1 vmsppl 368 2018 0 1997 3 0 3 3 0 8 0 rwobjpl 56 45572 0 40108 78 0 78 78 0 8 0 pdppl 4096 4046 0 3994 72 18 54 62 0 8 2 pvpl 32 996075 0 981559 195 66 129 168 0 265 0 pmappl 248 2018 0 1997 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 789 0 31 22 0 22 22 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(408633c,1,2000,ffff800021237260) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260e4028) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd806877d1c8,1,fffffd807f7d78a0,ffff800021237260) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260e4278,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800021237260,ffffff9c,20000040,0,0,ffff8000260e4460) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260e44d0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260e44d0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x93c013744e0, 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(ffff8000211857e0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8068bcfe70) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8068bcfe70) 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(ffff8000211857e0,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8068bcfe70) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8068bcfe70) 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