uvm_fault(0xfffffd8069e0e460, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND 331624 76778 0 0 0 0 syz-executor.0 * 35442 76778 0 0 0x4000000 1K syz-executor.0 pppacopen(86353,1,2000,ffff8000248ce548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bfc98) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8063ea5478,1,fffffd807f7d7900,ffff8000248ce548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bfee8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000248ce548,ffffff9c,20000780,0,0,ffff8000246c00d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246c0140) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c0140) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a33fdba900, 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(0xfffffd8069e0e460, 0x668, 0, 2) -> e ddb{1}> trace pppacopen(86353,1,2000,ffff8000248ce548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bfc98) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8063ea5478,1,fffffd807f7d7900,ffff8000248ce548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bfee8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000248ce548,ffffff9c,20000780,0,0,ffff8000246c00d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246c0140) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c0140) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a33fdba900, count: -7 ddb{1}> show registers rdi 0xffff800021297000 rsi 0xd0c rbp 0xffff8000246bfc10 rbx 0 rdx 0xffff800021297000 rcx 0xd0b rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d7900 r10 0x2e3bd52c16368cde r11 0xbebd2dbdd5433284 r12 0xfffffd8063ea5478 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff8000246bfc98 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246bfbc0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{1}> show proc PROC (syz-executor.0) pid=35442 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000248ced28,0xffff8000248cefd8 process=0xffff8000ffffa998 user=0xffff8000246bb000, vmspace=0xfffffd8069e0e460 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66157 424798 40596 0 2 0 syz-executor.2 95721 71318 20771 0 2 0 syz-executor.3 76778 331624 28634 0 7 0 syz-executor.0 *76778 35442 28634 0 7 0x4000000 syz-executor.0 20771 182461 96859 0 3 0x82 nanoslp syz-executor.3 40596 105797 96859 0 3 0x82 nanoslp syz-executor.2 78601 169694 96859 0 3 0x82 nanoslp syz-executor.1 28634 302407 96859 0 3 0x82 nanoslp syz-executor.0 96859 25624 83192 0 3 0x82 thrsleep syz-fuzzer 96859 114342 83192 0 3 0x4000082 nanoslp syz-fuzzer 96859 328193 83192 0 3 0x4000082 thrsleep syz-fuzzer 96859 420869 83192 0 3 0x4000082 kqread syz-fuzzer 96859 497759 83192 0 3 0x4000082 thrsleep syz-fuzzer 96859 1867 83192 0 3 0x4000082 thrsleep syz-fuzzer 96859 317019 83192 0 3 0x4000082 thrsleep syz-fuzzer 96859 255199 83192 0 3 0x4000082 nanoslp syz-fuzzer 83192 305941 98856 0 3 0x10008a sigsusp ksh 98856 450674 30457 0 3 0x9a poll sshd 60035 481574 1 0 3 0x100083 ttyin getty 30457 347765 1 0 3 0x88 poll sshd 28997 437033 85278 74 3 0x100092 bpf pflogd 85278 402739 1 0 3 0x80 netio pflogd 53738 456702 40665 73 3 0x100090 kqread syslogd 40665 18335 1 0 3 0x100082 netio syslogd 21500 357284 1 0 3 0x100080 kqread resolvd 82402 123244 4390 77 3 0x100092 kqread dhcpleased 5487 302828 4390 77 3 0x100092 kqread dhcpleased 4390 433776 1 0 3 0x80 kqread dhcpleased 871 220896 0 0 3 0x14200 bored smr 74754 507827 0 0 2 0x14200 zerothread 57505 275538 0 0 3 0x14200 aiodoned aiodoned 14421 121945 0 0 3 0x14200 syncer update 43171 512647 0 0 3 0x14200 cleaner cleaner 77993 178166 0 0 3 0x14200 reaper reaper 76752 117523 0 0 3 0x14200 pgdaemon pagedaemon 31676 86213 0 0 3 0x14200 bored viomb 37374 453069 0 0 3 0x40014200 acpi0 acpi0 18552 69184 0 0 3 0x40014200 idle1 68009 134942 0 0 3 0x14200 bored softnet 37217 265452 0 0 3 0x14200 bored systqmp 41738 250249 0 0 3 0x14200 bored systq 55070 449691 0 0 3 0x40014200 bored softclock 94308 206394 0 0 3 0x40014200 idle0 1 359264 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76778 (syz-executor.0) thread 0xffff8000248ce548 (35442) 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 10163 6466K 6919K 78643K 12418 0 pcb 13 8K 8K 78643K 112 0 rtable 154 5K 8K 78643K 504 0 ifaddr 59 13K 14K 78643K 117 0 counters 48 34K 34K 78643K 50 0 ioctlops 0 0K 4K 78643K 1592 0 iov 0 0K 24K 78643K 31 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1237 78K 78K 78643K 1600 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 12 0K 0K 78643K 25 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 9 29K 49K 78643K 1151 0 proc 69 87K 123K 78643K 469 0 subproc 52 3K 3K 78643K 65 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 49 0 in_multi 55 3K 3K 78643K 108 0 ether_multi 1 0K 0K 78643K 22 0 mrt 0 0K 0K 78643K 66 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 2K 78643K 539 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 207 44K 44K 78643K 15103 0 UVM aobj 28 2K 2K 78643K 28 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 56 0 NDP 8 0K 1K 78643K 23 0 temp 64 4189K 4317K 78643K 18130 0 kqueue 10 14K 16K 78643K 48 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 66 0 63 1 0 1 1 0 8 0 rtentry 112 108 0 42 2 0 2 2 0 8 0 unpcb 136 201 0 186 1 0 1 1 0 8 0 syncache 296 55 0 55 4 3 1 1 0 8 1 tcpqe 32 34 0 34 3 2 1 1 0 8 1 tcpcb 736 346 0 324 3 0 3 3 0 8 0 arp 120 12 0 2 1 0 1 1 0 8 0 inpcb 304 662 0 647 2 0 2 2 0 8 0 rttmr 72 26 0 26 2 2 0 1 0 8 0 nd6 48 19 0 7 1 0 1 1 0 8 0 kcovpl 48 5 0 1 1 0 1 1 0 8 0 pfstscr 40 16 0 16 2 2 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 69 0 68 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 264 16 0 16 1 1 0 1 0 8 0 pfstitem 24 22 0 11 1 0 1 1 0 8 0 pfstkey 112 44 0 33 1 0 1 1 0 8 0 pfstate 320 32 0 21 3 1 2 2 0 8 0 pfrule 1360 89 0 76 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 321 0 44 18 0 18 18 0 8 0 art_table 32 322 0 44 3 0 3 3 0 8 0 art_node 16 107 0 47 1 0 1 1 0 8 0 semupl 112 9 0 9 1 0 1 1 0 8 1 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 25 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2852 0 1432 90 0 90 90 0 8 0 ffsino 272 2852 0 1432 96 0 96 96 0 8 0 nchpl 144 4401 0 2796 61 0 61 61 0 8 0 uvmvnodes 80 3186 0 0 66 0 66 66 0 8 0 vnodes 224 3186 0 0 188 0 188 188 0 8 0 namei 1024 12116 0 12116 1 0 1 1 0 8 1 percpumem 16 37 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 20 0 20 3 3 0 1 0 8 0 scxspl 216 15329 0 15329 9 8 1 8 0 8 1 plimitpl 152 68 0 57 1 0 1 1 0 8 0 sigapl 424 1392 0 1356 5 0 5 5 0 8 0 futexpl 64 8264 0 8264 1 0 1 1 0 8 1 knotepl 112 69 0 0 2 0 2 2 0 8 0 kqueuepl 216 111 0 105 1 0 1 1 0 8 0 pipepl 336 157 0 141 2 0 2 2 0 8 0 fdescpl 496 1378 0 1356 5 1 4 4 0 8 1 filepl 152 5065 0 4914 8 1 7 8 0 8 1 lockfpl 104 150 0 148 1 0 1 1 0 8 0 lockfspl 48 61 0 59 1 0 1 1 0 8 0 sessionpl 144 21 0 8 1 0 1 1 0 8 0 pgrppl 48 29 0 16 1 0 1 1 0 8 0 ucredpl 96 572 0 559 1 0 1 1 0 8 0 zombiepl 144 1356 0 1355 1 0 1 1 0 8 0 processpl 1064 1392 0 1355 3 0 3 3 0 8 0 procpl 672 2688 0 2643 5 0 5 5 0 8 0 sockpl 480 929 0 896 7 2 5 6 0 8 0 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 123 0 0 15 0 15 15 0 8 0 mtagpl 96 105 0 0 3 0 3 3 0 8 0 mbufpl 256 468 0 0 28 0 28 28 0 8 0 bufpl 288 6382 0 141 446 0 446 446 0 8 0 anonpl 24 327755 0 320686 55 7 48 53 0 186 0 amapchunkpl 152 35264 0 34810 24 3 21 22 0 158 0 amappl16 200 2807 0 2662 11 3 8 11 0 8 0 amappl15 192 310 0 307 1 0 1 1 0 8 0 amappl14 184 2 0 1 1 0 1 1 0 8 0 amappl13 176 47 0 46 1 0 1 1 0 8 0 amappl12 168 303 0 300 1 0 1 1 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 48 0 40 1 0 1 1 0 8 0 amappl9 144 982 0 978 1 0 1 1 0 8 0 amappl8 136 412 0 373 2 0 2 2 0 8 0 amappl7 128 81 0 71 1 0 1 1 0 8 0 amappl6 120 669 0 648 1 0 1 1 0 8 0 amappl5 112 967 0 948 1 0 1 1 0 8 0 amappl4 104 651 0 625 1 0 1 1 0 8 0 amappl3 96 478 0 461 1 0 1 1 0 8 0 amappl2 88 696 0 655 3 2 1 2 0 8 0 amappl1 80 25947 0 25480 13 2 11 13 0 8 0 amappl 88 14692 0 14542 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 27 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1378 0 1356 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1378 0 1356 1 0 1 1 0 8 0 vmmpekpl 168 11081 0 11046 2 0 2 2 0 8 0 vmmpepl 168 121893 0 120329 88 4 84 84 0 357 10 vmsppl 368 1377 0 1356 3 0 3 3 0 8 0 rwobjpl 56 31984 0 27842 59 0 59 59 0 8 0 pdppl 4096 2764 0 2712 84 30 54 62 0 8 2 pvpl 32 720870 0 710295 142 43 99 142 0 265 0 pmappl 248 1377 0 1356 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 803 0 32 23 0 23 23 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x129 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffe1f50, 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 __mp_lock(ffffffff828f9a08) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828f9a08) at __mp_lock+0x129 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0x7f7ffffe1f50, count: -6 ddb{0}> machine ddbcpu 1 Stopped at pppacopen+0x1b5: movq %r13,0x668 pppacopen(86353,1,2000,ffff8000248ce548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bfc98) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8063ea5478,1,fffffd807f7d7900,ffff8000248ce548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bfee8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000248ce548,ffffff9c,20000780,0,0,ffff8000246c00d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246c0140) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c0140) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a33fdba900, count: 8 ddb{1}> trace pppacopen(86353,1,2000,ffff8000248ce548) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000246bfc98) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd8063ea5478,1,fffffd807f7d7900,ffff8000248ce548) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000246bfee8,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff8000248ce548,ffffff9c,20000780,0,0,ffff8000246c00d0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000246c0140) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246c0140) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a33fdba900, count: -7