uvm_fault(0xfffffd80684092f0, 0x668, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pppacopen+0x1b5: movq %r13,0x668 TID PID UID PRFLAGS PFLAGS CPU COMMAND *335750 3670 0 0 0x4000000 0K syz-executor.0 271281 36868 0 0x14000 0x200 1 reaper pppacopen(86353,1,2000,ffff800027af4fc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260ec8c8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80678ba558,1,fffffd807f7d74e0,ffff800027af4fc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260ecb18,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af4fc8,ffffff9c,20000780,0,0,ffff8000260ecd00) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260ecd70) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260ecd70) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc4bda713d40, 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(0xfffffd80684092f0, 0x668, 0, 2) -> e ddb{0}> trace pppacopen(86353,1,2000,ffff800027af4fc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260ec8c8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80678ba558,1,fffffd807f7d74e0,ffff800027af4fc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260ecb18,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af4fc8,ffffff9c,20000780,0,0,ffff8000260ecd00) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260ecd70) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260ecd70) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc4bda713d40, count: -7 ddb{0}> show registers rdi 0xffff800021297000 rsi 0xdf1 rbp 0xffff8000260ec840 rbx 0 rdx 0xffff800021297000 rcx 0xdf0 rax 0xffffffff81c79ee5 pppacopen+0x1b5 r8 0x770 r9 0xfffffd807f7d74e0 r10 0xf10939e3b9490c04 r11 0xe5e8979ec7252b86 r12 0xfffffd80678ba558 r13 0 r14 0x86353 acpi_pdirpa+0x721bb r15 0xffff8000260ec8c8 rip 0xffffffff81c79ee5 pppacopen+0x1b5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000260ec7f0 ss 0x10 pppacopen+0x1b5: movq %r13,0x668 ddb{0}> show proc PROC (syz-executor.0) pid=335750 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=59, nice=20 forw=0xffffffffffffffff, list=0xffff800027af4548,0xffffffff8293ceb0 process=0xffff8000ffffadc0 user=0xffff8000260e7000, vmspace=0xfffffd80684092f0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 3670 455548 49117 0 2 0 syz-executor.0 * 3670 335750 49117 0 7 0x4000000 syz-executor.0 80980 301735 0 0 3 0x14280 nfsidl nfsio 61640 128966 0 0 3 0x14280 nfsidl nfsio 2158 216602 0 0 3 0x14280 nfsidl nfsio 80236 300074 0 0 3 0x14280 nfsidl nfsio 53632 443042 0 0 3 0x14280 nfsidl nfsio 82207 9500 0 0 3 0x14280 nfsidl nfsio 13017 145797 0 0 3 0x14280 nfsidl nfsio 42839 59585 0 0 3 0x14280 nfsidl nfsio 60818 246521 0 0 3 0x14280 nfsidl nfsio 6684 224784 0 0 3 0x14280 nfsidl nfsio 70161 51913 0 0 3 0x14280 nfsidl nfsio 27541 471541 0 0 3 0x14280 nfsidl nfsio 63784 371596 0 0 3 0x14280 nfsidl nfsio 86208 190820 0 0 3 0x14280 nfsidl nfsio 51249 483378 0 0 3 0x14280 nfsidl nfsio 18889 443166 0 0 3 0x14280 nfsidl nfsio 51721 458410 0 0 3 0x14280 nfsidl nfsio 42261 286857 0 0 3 0x14280 nfsidl nfsio 47844 231660 0 0 3 0x14280 nfsidl nfsio 66077 138023 0 0 3 0x14280 nfsidl nfsio 27074 237353 1 0 3 0x100083 ttyin getty 13085 110932 0 0 3 0x14200 bored sosplice 85426 83708 25907 0 3 0x82 nanoslp syz-executor.2 21597 150330 25907 0 3 0x82 nanoslp syz-executor.3 92278 385811 25907 0 2 0x2 syz-executor.1 49117 239674 25907 0 3 0x82 nanoslp syz-executor.0 25907 472580 88692 0 3 0x82 thrsleep syz-fuzzer 25907 453389 88692 0 3 0x4000082 nanoslp syz-fuzzer 25907 34118 88692 0 3 0x4000082 thrsleep syz-fuzzer 25907 280449 88692 0 3 0x4000082 kqread syz-fuzzer 25907 370185 88692 0 3 0x4000082 nanoslp syz-fuzzer 25907 277687 88692 0 3 0x4000082 thrsleep syz-fuzzer 25907 14115 88692 0 3 0x4000082 thrsleep syz-fuzzer 25907 234258 88692 0 3 0x4000082 thrsleep syz-fuzzer 88692 483573 41948 0 3 0x10008a sigsusp ksh 41948 97280 18222 0 3 0x9a poll sshd 18222 237260 1 0 3 0x88 poll sshd 21013 171201 58371 74 3 0x100092 bpf pflogd 58371 155597 1 0 3 0x80 netio pflogd 37885 312852 74844 73 3 0x100090 kqread syslogd 74844 394726 1 0 3 0x100082 netio syslogd 11500 78054 1 0 3 0x100080 kqread resolvd 69197 242152 62233 77 3 0x100092 kqread dhcpleased 95908 17121 62233 77 3 0x100092 kqread dhcpleased 62233 183086 1 0 3 0x80 kqread dhcpleased 80967 172108 0 0 3 0x14200 bored smr 6284 73331 0 0 2 0x14200 zerothread 29906 516202 0 0 3 0x14200 aiodoned aiodoned 53394 100785 0 0 3 0x14200 syncer update 34218 1405 0 0 3 0x14200 cleaner cleaner 36868 271281 0 0 7 0x14200 reaper 11661 169060 0 0 3 0x14200 pgdaemon pagedaemon 62455 475448 0 0 3 0x14200 bored viomb 1973 150799 0 0 3 0x40014200 acpi0 acpi0 38687 191950 0 0 3 0x40014200 idle1 66678 322066 0 0 3 0x14200 bored softnet 23900 188615 0 0 3 0x14200 bored systqmp 15132 162501 0 0 3 0x14200 bored systq 53469 323231 0 0 3 0x40014200 bored softclock 59547 182341 0 0 3 0x40014200 idle0 1 32871 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd807f0008c8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x8b rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x8b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_do_remove+0x8b sys/arch/amd64/amd64/pmap.c:1769 #4 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #7 reaper+0x18b sys/kern/kern_exit.c:462 #8 proc_trampoline+0x1c Process 3670 (syz-executor.0) thread 0xffff800027af4fc8 (335750) 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10167 6531K 6722K 78643K 11533 0 pcb 13 8K 8K 78643K 27 0 rtable 143 4K 5K 78643K 253 0 ifaddr 62 14K 14K 78643K 72 0 counters 48 34K 34K 78643K 50 0 ioctlops 0 0K 4K 78643K 1506 0 iov 0 0K 4K 78643K 3 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1231 77K 78K 78643K 1332 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 10 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 49K 78643K 410 0 sigio 0 0K 0K 78643K 3 0 proc 70 87K 111K 78643K 408 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 11 0 in_multi 51 3K 4K 78643K 71 0 ether_multi 1 0K 0K 78643K 7 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 464 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 225 46K 61K 78643K 6257 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 22 0 NDP 8 0K 1K 78643K 17 0 temp 70 4194K 4259K 78643K 4451 0 kqueue 10 14K 16K 78643K 26 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 39 0 36 1 0 1 1 0 8 0 rtentry 112 67 0 6 2 0 2 2 0 8 0 unpcb 136 82 0 67 1 0 1 1 0 8 0 syncache 296 6 0 6 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 49 0 44 2 0 2 2 0 8 0 arp 120 10 0 0 1 0 1 1 0 8 0 inpcb 304 157 0 149 1 0 1 1 0 8 0 nd6 48 12 0 2 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 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 5 0 4 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 25 0 1 1 0 1 1 0 8 0 pfstkey 112 27 0 3 1 0 1 1 0 8 0 pfstate 320 25 0 2 2 0 2 2 0 8 0 pfrule 1360 37 0 30 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 16 18 0 18 18 0 8 0 art_table 32 278 0 16 3 0 3 3 0 8 0 art_node 16 66 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 23 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1890 0 475 89 0 89 89 0 8 0 ffsino 272 1890 0 475 95 0 95 95 0 8 0 nchpl 144 2505 0 889 61 0 61 61 0 8 0 uvmvnodes 80 2010 0 0 42 0 42 42 0 8 0 vnodes 224 2010 0 0 119 0 119 119 0 8 0 namei 1024 6840 0 6840 1 0 1 1 0 8 1 percpumem 16 37 0 1 1 0 1 1 0 8 0 scxspl 216 7639 0 7639 9 2 7 8 0 8 7 plimitpl 152 30 0 19 1 0 1 1 0 8 0 sigapl 424 670 0 615 7 0 7 7 0 8 0 futexpl 64 1677 0 1677 1 0 1 1 0 8 1 knotepl 112 68 0 0 2 0 2 2 0 8 0 kqueuepl 216 28 0 22 1 0 1 1 0 8 0 pipepl 336 98 0 82 2 0 2 2 0 8 0 fdescpl 496 635 0 615 4 1 3 4 0 8 0 filepl 152 2134 0 1982 7 0 7 7 0 8 1 lockfpl 104 40 0 38 1 0 1 1 0 8 0 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 21 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 8 1 0 1 1 0 8 0 ucredpl 96 177 0 164 1 0 1 1 0 8 0 zombiepl 144 615 0 613 1 0 1 1 0 8 0 processpl 1064 670 0 613 4 0 4 4 0 8 0 procpl 672 1061 0 995 7 0 7 7 0 8 1 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 480 278 0 252 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 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 152 0 0 18 0 18 18 0 8 0 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 317 0 0 20 0 20 20 0 8 0 bufpl 288 4012 0 141 277 0 277 277 0 8 0 anonpl 24 149046 0 134512 118 6 112 112 0 186 17 amapchunkpl 152 15113 0 14489 40 7 33 39 0 158 5 amappl16 200 1778 0 1346 33 1 32 32 0 8 8 amappl15 192 86 0 84 1 0 1 1 0 8 0 amappl14 184 99 0 93 1 0 1 1 0 8 0 amappl13 176 41 0 40 1 0 1 1 0 8 0 amappl12 168 104 0 101 1 0 1 1 0 8 0 amappl11 160 60 0 44 1 0 1 1 0 8 0 amappl10 152 134 0 125 1 0 1 1 0 8 0 amappl9 144 568 0 563 1 0 1 1 0 8 0 amappl8 136 372 0 338 2 0 2 2 0 8 0 amappl7 128 76 0 67 1 0 1 1 0 8 0 amappl6 120 257 0 238 1 0 1 1 0 8 0 amappl5 112 506 0 487 1 0 1 1 0 8 0 amappl4 104 689 0 665 1 0 1 1 0 8 0 amappl3 96 264 0 246 1 0 1 1 0 8 0 amappl2 88 368 0 329 2 1 1 2 0 8 0 amappl1 80 13923 0 13456 13 2 11 13 0 8 0 amappl 88 5913 0 5747 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 24 635 0 615 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 635 0 615 1 0 1 1 0 8 0 vmmpekpl 168 8205 0 8173 2 0 2 2 0 8 0 vmmpepl 168 60238 0 58454 102 6 96 102 0 357 11 vmsppl 368 634 0 614 3 0 3 3 0 8 0 rwobjpl 56 17537 0 14291 47 0 47 47 0 8 0 pdppl 4096 1278 0 1228 73 19 54 62 0 8 4 pvpl 32 338163 0 320084 185 1 184 184 0 265 31 pmappl 248 634 0 614 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 611 0 22 17 0 17 17 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace pppacopen(86353,1,2000,ffff800027af4fc8) at pppacopen+0x1b5 sys/net/if_pppx.c:1020 spec_open(ffff8000260ec8c8) at spec_open+0x3d7 sys/kern/spec_vnops.c:157 VOP_OPEN(fffffd80678ba558,1,fffffd807f7d74e0,ffff800027af4fc8) at VOP_OPEN+0x75 sys/kern/vfs_vops.c:138 vn_open(ffff8000260ecb18,1,0) at vn_open+0x467 sys/kern/vfs_vnops.c:183 doopenat(ffff800027af4fc8,ffffff9c,20000780,0,0,ffff8000260ecd00) at doopenat+0x26a sys/kern/vfs_syscalls.c:1128 syscall(ffff8000260ecd70) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000260ecd70) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc4bda713d40, 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(ffff800021185160,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8068409b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8068409b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149260) 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(ffff800021185160,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd8068409b90) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd8068409b90) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149260) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -8