uvm_fault(0xfffffd807115fcf8, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *373133 23145 0 0 0x4000000 0K syz-executor.0 499445 48329 0 0x14000 0x200 1 reaper pppacopen(86338,1,2000,ffff8000212557a0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027aebf18) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80747b6730,1,fffffd807f7d75a0,ffff8000212557a0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027aec168,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000212557a0,ffffff9c,20000000,0,0,ffff800027aec350) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027aec3c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027aec3c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc959b0ee680, 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(0xfffffd807115fcf8, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(86338,1,2000,ffff8000212557a0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027aebf18) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80747b6730,1,fffffd807f7d75a0,ffff8000212557a0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027aec168,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000212557a0,ffffff9c,20000000,0,0,ffff800027aec350) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027aec3c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027aec3c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc959b0ee680, count: -7 ddb{0}> show registers rdi 0xffff800021a97000 rsi 0x962 rbp 0xffff800027aebe90 rbx 0 rdx 0xffff800021a97000 rcx 0x961 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d75a0 r10 0x622dc93815a47aaa r11 0xcc9ae8415eb19c2a r12 0xfffffd80747b6730 r13 0 r14 0x86338 acpi_pdirpa+0x721a0 r15 0xffff800027aebf18 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800027aebe40 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.0) pid=373133 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021254000,0xffff800021255cf0 process=0xffff8000ffffadc0 user=0xffff800027ae7000, vmspace=0xfffffd807115fcf8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28181 143792 17735 0 2 0 syz-executor.3 23145 334837 51352 0 2 0 syz-executor.0 *23145 373133 51352 0 7 0x4000000 syz-executor.0 17735 182537 68129 0 3 0x82 nanoslp syz-executor.3 79061 197502 68129 0 2 0x482 syz-executor.2 93231 259512 68129 0 2 0x482 syz-executor.1 51352 253267 68129 0 2 0x482 syz-executor.0 68129 442724 17453 0 3 0x82 thrsleep syz-fuzzer 68129 466344 17453 0 3 0x4000082 nanoslp syz-fuzzer 68129 385877 17453 0 3 0x4000082 nanoslp syz-fuzzer 68129 188393 17453 0 3 0x4000082 thrsleep syz-fuzzer 68129 125150 17453 0 3 0x4000082 thrsleep syz-fuzzer 68129 211462 17453 0 3 0x4000082 thrsleep syz-fuzzer 68129 288094 17453 0 3 0x4000082 thrsleep syz-fuzzer 68129 116762 17453 0 3 0x4000082 kqread syz-fuzzer 17453 324556 81041 0 3 0x10008a sigsusp ksh 81041 351648 63835 0 3 0x9a poll sshd 10635 371088 1 0 3 0x100083 ttyin getty 63835 473481 1 0 3 0x88 poll sshd 88220 44636 29722 74 3 0x100092 bpf pflogd 29722 216057 1 0 3 0x80 netio pflogd 8411 359396 53133 73 3 0x100090 kqread syslogd 53133 410209 1 0 3 0x100082 netio syslogd 15053 349412 1 0 3 0x100080 kqread resolvd 11563 191494 88198 77 3 0x100092 kqread dhcpleased 98883 494960 88198 77 3 0x100092 kqread dhcpleased 88198 56655 1 0 3 0x80 kqread dhcpleased 53572 375694 0 0 3 0x14200 bored smr 14762 262358 0 0 2 0x14200 zerothread 37443 295726 0 0 3 0x14200 aiodoned aiodoned 50083 270061 0 0 3 0x14200 syncer update 1148 171881 0 0 3 0x14200 cleaner cleaner 48329 499445 0 0 7 0x14200 reaper 8248 148041 0 0 3 0x14200 pgdaemon pagedaemon 91265 120343 0 0 3 0x14200 bored viomb 66237 92985 0 0 3 0x40014200 acpi0 acpi0 13894 28514 0 0 3 0x40014200 idle1 43117 98778 0 0 3 0x14200 bored softnet 2445 406184 0 0 3 0x14200 bored systqmp 40135 201090 0 0 3 0x14200 bored systq 95504 384530 0 0 3 0x40014200 bored softclock 89498 59979 0 0 3 0x40014200 idle0 1 85130 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 23145 (syz-executor.0) thread 0xffff8000212557a0 (373133) 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 48329 (reaper) thread 0xffff8000211497a0 (499445) uvm_fault(0xfffffd807115fcf8, 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 10164 6530K 6657K 78643K 11335 0 pcb 13 8K 8K 78643K 20 0 rtable 145 4K 6K 78643K 269 0 ifaddr 58 13K 13K 78643K 68 0 counters 48 34K 34K 78643K 48 0 ioctlops 0 0K 4K 78643K 1495 0 iov 0 0K 8K 78643K 5 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1231 77K 77K 78643K 1267 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 6 0K 0K 78643K 6 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 49K 78643K 191 0 proc 69 87K 111K 78643K 398 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 13 0 in_multi 51 3K 3K 78643K 81 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 2K 78643K 452 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 215 42K 43K 78643K 3687 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 8 0K 1K 78643K 19 0 temp 60 4192K 4256K 78643K 3934 0 kqueue 10 14K 16K 78643K 14 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 30 0 27 1 0 1 1 0 8 0 rtentry 112 79 0 16 2 0 2 2 0 8 0 unpcb 136 50 0 35 1 0 1 1 0 8 0 syncache 296 6 0 6 2 1 1 1 0 8 1 tcpqe 32 779 0 779 2 0 2 2 0 8 2 tcpcb 736 30 0 25 2 0 2 2 0 8 1 arp 120 10 0 0 1 0 1 1 0 8 0 inpcb 304 93 0 85 2 0 2 2 0 8 1 nd6 48 15 0 5 1 0 1 1 0 8 0 kcovpl 48 4 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 1 0 1 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 4 0 4 1 0 1 1 0 8 1 pfstitem 24 16 0 0 1 0 1 1 0 8 0 pfstkey 112 18 0 2 1 0 1 1 0 8 0 pfstate 320 16 0 1 2 0 2 2 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 348 0 88 18 0 18 18 0 8 0 art_table 32 349 0 88 3 0 3 3 0 8 0 art_node 16 78 0 20 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1600 0 186 89 0 89 89 0 8 0 ffsino 272 1600 0 186 95 0 95 95 0 8 0 nchpl 144 1959 0 335 61 0 61 61 0 8 0 uvmvnodes 80 1680 0 0 35 0 35 35 0 8 0 vnodes 224 1680 0 0 99 0 99 99 0 8 0 namei 1024 5571 0 5571 1 0 1 1 0 8 1 percpumem 16 36 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 4 1 0 1 1 0 8 1 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 scxspl 216 5719 0 5719 2 1 1 2 0 8 1 plimitpl 152 23 0 12 1 0 1 1 0 8 0 sigapl 424 429 0 394 5 0 5 5 0 8 0 futexpl 64 654 0 654 1 0 1 1 0 8 1 knotepl 112 70 0 0 2 0 2 2 0 8 0 kqueuepl 216 19 0 13 1 0 1 1 0 8 0 pipepl 336 90 0 74 2 0 2 2 0 8 0 fdescpl 496 415 0 394 4 0 4 4 0 8 1 filepl 152 1606 0 1455 7 0 7 7 0 8 1 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 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 96 108 0 96 1 0 1 1 0 8 0 zombiepl 144 394 0 392 1 0 1 1 0 8 0 processpl 1064 429 0 392 3 0 3 3 0 8 0 procpl 672 579 0 533 5 0 5 5 0 8 1 sockpl 480 173 0 147 5 0 5 5 0 8 1 mcl16k 16384 1 0 0 1 0 1 1 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 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 199 0 0 24 0 24 24 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 274 0 0 17 0 17 17 0 8 0 bufpl 288 3703 0 141 255 0 255 255 0 8 0 anonpl 24 101617 0 87239 119 4 115 115 0 186 20 amapchunkpl 152 8528 0 7906 29 0 29 29 0 158 2 amappl16 200 1783 0 1360 36 4 32 36 0 8 8 amappl15 192 1 0 0 1 0 1 1 0 8 0 amappl14 184 6 0 4 1 0 1 1 0 8 0 amappl13 176 77 0 74 1 0 1 1 0 8 0 amappl12 168 27 0 24 1 0 1 1 0 8 0 amappl11 160 75 0 58 1 0 1 1 0 8 0 amappl10 152 47 0 38 1 0 1 1 0 8 0 amappl9 144 516 0 513 1 0 1 1 0 8 0 amappl8 136 396 0 362 2 0 2 2 0 8 0 amappl7 128 118 0 105 1 0 1 1 0 8 0 amappl6 120 187 0 171 1 0 1 1 0 8 0 amappl5 112 282 0 265 1 0 1 1 0 8 0 amappl4 104 632 0 608 1 0 1 1 0 8 0 amappl3 96 168 0 150 1 0 1 1 0 8 0 amappl2 88 405 0 366 2 1 1 2 0 8 0 amappl1 80 10346 0 9877 13 1 12 13 0 8 0 amappl 88 3347 0 3184 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 24 419 0 398 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 419 0 398 1 0 1 1 0 8 0 vmmpekpl 168 7045 0 7010 2 0 2 2 0 8 0 vmmpepl 168 43227 0 41405 107 0 107 107 0 357 24 vmsppl 368 418 0 397 3 0 3 3 0 8 1 rwobjpl 56 13731 0 10823 45 1 44 44 0 8 0 pdppl 4096 846 0 794 72 18 54 62 0 8 2 pvpl 32 257723 0 239926 191 0 191 191 0 265 30 pmappl 248 418 0 397 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 590 0 21 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(86338,1,2000,ffff8000212557a0) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff800027aebf18) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80747b6730,1,fffffd807f7d75a0,ffff8000212557a0) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff800027aec168,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000212557a0,ffffff9c,20000000,0,0,ffff800027aec350) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff800027aec3c0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800027aec3c0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc959b0ee680, 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021185a30,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd807115f178) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd807115f178) 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: 6 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:578 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021185a30,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd807115f178) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd807115f178) 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: -9