uvm_fault(0xffffffff8254c078, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xffffffff8254c078, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(ffff800000a6a800,ffff800014932238,10) at tun_dev_read+0x2ab sys/net/if_tun.c:826 end trace frame: 0xffff800014932070, count: 0 ddb> trace tun_dev_read(ffff800000a6a800,ffff800014932238,10) at tun_dev_read+0x2ab sys/net/if_tun.c:826 spec_read(ffff800014932080) at spec_read+0xe9 sys/kern/spec_vnops.c:222 VOP_READ(fffffd803663b5b0,ffff800014932238,10,fffffd803f7c6900) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd802fd24f10,ffff800014932238,0) at vn_read+0x11f sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000ffff2018,f0,ffff800014932238,0,ffff800014932320) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff2018,ffff8000149322d0,ffff800014932320) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff8000149323a0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xddf8bb75260, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff800014931fc0 rbx 0x3b2 rdx 0x8e rcx 0xffff800014941000 rax 0xffff800000a6c040 r8 0x7f7fffffc000 r9 0x5 r10 0xa41d3571ba4d3a95 r11 0x7d3353cf754774e9 r12 0xffff800014932238 r13 0x10 r14 0xfffffd0000000000 r15 0 rip 0xffffffff814d9f0b tun_dev_read+0x2ab cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800014931f50 ss 0x10 tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=174557 stat=onproc flags process=0 proc=4000000 pri=82, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2f48,0xffffffff82593130 process=0xffff8000ffff7890 user=0xffff80001492d000, vmspace=0xfffffd803f011110 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 41107 397126 89459 0 2 0 syz-executor.0 *41107 174557 89459 0 7 0x4000000 syz-executor.0 34270 393937 21475 0 3 0x80 nanosleep syz-executor.1 34270 420813 21475 0 3 0x4000080 ttyin syz-executor.1 17195 313535 0 0 3 0x14200 bored sosplice 89459 182850 84517 0 3 0x82 nanosleep syz-executor.0 21475 251125 84517 0 3 0x82 nanosleep syz-executor.1 84517 522308 25311 0 3 0x82 thrsleep syz-fuzzer 84517 392652 25311 0 3 0x4000082 thrsleep syz-fuzzer 84517 223748 25311 0 3 0x4000082 thrsleep syz-fuzzer 84517 404215 25311 0 3 0x4000082 thrsleep syz-fuzzer 84517 261666 25311 0 3 0x4000082 thrsleep syz-fuzzer 84517 509567 25311 0 3 0x4000082 kqread syz-fuzzer 84517 477115 25311 0 3 0x4000082 thrsleep syz-fuzzer 84517 187236 25311 0 3 0x4000082 thrsleep syz-fuzzer 25311 57662 1163 0 3 0x10008a pause ksh 1163 342948 41490 0 3 0x92 select sshd 22365 446455 1 0 3 0x100083 ttyin getty 41490 115057 1 0 3 0x80 select sshd 3217 336965 98181 73 3 0x100090 kqread syslogd 98181 46086 1 0 3 0x100082 netio syslogd 77556 201930 1 77 3 0x100090 poll dhclient 8210 41210 1 0 3 0x80 poll dhclient 20240 290694 0 0 2 0x14200 zerothread 82087 371093 0 0 3 0x14200 aiodoned aiodoned 60933 189478 0 0 3 0x14200 syncer update 49299 407437 0 0 3 0x14200 cleaner cleaner 57359 205976 0 0 3 0x14200 reaper reaper 37674 250306 0 0 3 0x14200 pgdaemon pagedaemon 1309 245845 0 0 3 0x14200 bored crynlk 86628 47055 0 0 3 0x14200 bored crypto 61487 104239 0 0 3 0x40014200 acpi0 acpi0 37577 512217 0 0 3 0x14200 bored softnet 17404 197069 0 0 3 0x14200 bored systqmp 74671 92476 0 0 3 0x14200 bored systq 29297 89160 0 0 3 0x40014200 bored softclock 4056 26462 0 0 3 0x40014200 idle0 79334 387381 0 0 3 0x14200 bored smr 1 212014 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9491 6340K 6982K 78643K 11490 0 pcb 13 8K 8K 78643K 129 0 rtable 103 4K 4K 78643K 393 0 ifaddr 66 14K 14K 78643K 143 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 46 0 iov 0 0K 24K 78643K 213 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1558 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 10 2K 2K 78643K 12 0 sem 12 0K 0K 78643K 162 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 449 0 sigio 0 0K 0K 78643K 16 0 proc 49 38K 54K 78643K 463 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 45 0 in_multi 54 2K 2K 78643K 82 0 ether_multi 1 0K 0K 78643K 3 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 66 291K 291K 78643K 66 0 exec 0 0K 1K 78643K 246 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 124 87K 87K 78643K 1990 0 UVM aobj 67 3K 3K 78643K 69 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 103 0 NDP 10 0K 0K 78643K 31 0 temp 126 3554K 3626K 78643K 8685 0 kqueue 0 0K 0K 78643K 6 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 12 0 6 1 0 1 1 0 8 0 rtpcb 96 83 0 81 1 0 1 1 0 8 0 rtentry 112 73 0 33 2 0 2 2 0 8 0 unpcb 120 356 0 347 1 0 1 1 0 8 0 syncache 280 4 0 4 1 1 0 1 0 8 0 tcpqe 32 202 0 202 1 1 0 1 0 8 0 tcpcb 640 610 0 603 4 2 2 3 0 8 1 ipq 40 10 0 10 2 2 0 1 0 8 0 ipqe 40 284 0 284 2 2 0 1 0 8 0 inpcb 280 1099 0 1089 4 1 3 3 0 8 2 rttmr 72 3 0 3 3 3 0 1 0 8 0 nd6 48 9 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 6 0 6 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 354 0 150 14 0 14 14 0 8 0 art_table 32 355 0 150 2 0 2 2 0 8 0 art_node 16 72 0 35 1 0 1 1 0 8 0 sysvmsgpl 40 31 0 20 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 160 0 150 1 0 1 1 0 8 0 shmpl 112 67 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2083 0 687 46 0 46 46 0 8 0 ffsino 240 2083 0 687 83 0 83 83 0 8 0 nchpl 144 2988 0 1392 60 0 60 60 0 8 0 uvmvnodes 72 2347 0 0 43 0 43 43 0 8 0 vnodes 208 2347 0 0 124 0 124 124 0 8 0 namei 1024 8898 0 8898 1 0 1 1 0 8 1 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 520 10 0 2 1 0 1 1 0 8 0 scxspl 208 8724 0 8724 9 8 1 7 0 8 1 plimitpl 152 55 0 48 1 0 1 1 0 8 0 sigapl 432 616 0 602 2 0 2 2 0 8 0 futexpl 56 13960 0 13960 1 0 1 1 0 8 1 knotepl 112 210 0 191 3 2 1 3 0 8 0 kqueuepl 104 161 0 159 1 0 1 1 0 8 0 pipepl 128 428 0 409 3 2 1 2 0 8 0 fdescpl 424 617 0 602 2 0 2 2 0 8 0 filepl 120 5350 0 5246 7 2 5 5 0 8 1 lockfpl 104 195 0 194 1 0 1 1 0 8 0 lockfspl 48 63 0 62 1 0 1 1 0 8 0 sessionpl 128 18 0 8 1 0 1 1 0 8 0 pgrppl 48 28 0 18 1 0 1 1 0 8 0 ucredpl 96 782 0 775 1 0 1 1 0 8 0 zombiepl 144 602 0 602 1 0 1 1 0 8 1 processpl 896 632 0 602 4 0 4 4 0 8 0 procpl 648 1204 0 1165 4 0 4 4 0 8 0 sosppl 144 14 0 14 2 2 0 1 0 8 0 sockpl 384 1545 0 1524 7 2 5 5 0 8 2 mcl64k 65536 302 0 301 34 27 7 33 0 8 6 mcl16k 16384 8 0 8 3 2 1 1 0 8 1 mcl12k 12288 23 0 23 2 1 1 1 0 8 1 mcl9k 9216 3 0 3 2 2 0 1 0 8 0 mcl8k 8192 26 0 26 2 1 1 1 0 8 1 mcl4k 4096 56 0 56 2 1 1 1 0 8 1 mcl2k2 2112 11 0 11 3 2 1 1 0 8 1 mcl2k 2048 64358 0 64336 16 12 4 13 0 8 0 mtagpl 80 6 0 2 2 1 1 1 0 8 0 mbufpl 256 108110 0 107991 40 28 12 23 0 8 0 bufpl 280 7323 0 2473 348 1 347 348 0 8 0 anonpl 16 91610 0 71112 107 8 99 99 0 62 14 amapchunkpl 152 3586 0 3435 25 15 10 20 0 158 2 amappl16 192 4209 0 3064 83 16 67 70 0 8 8 amappl14 176 52 0 47 1 0 1 1 0 8 0 amappl13 168 190 0 187 1 0 1 1 0 8 0 amappl12 160 16 0 16 2 2 0 1 0 8 0 amappl11 152 49 0 38 1 0 1 1 0 8 0 amappl10 144 18 0 16 1 0 1 1 0 8 0 amappl9 136 585 0 581 1 0 1 1 0 8 0 amappl8 128 170 0 139 2 0 2 2 0 8 0 amappl7 120 40 0 35 1 0 1 1 0 8 0 amappl6 112 66 0 55 1 0 1 1 0 8 0 amappl5 104 153 0 142 1 0 1 1 0 8 0 amappl4 96 1019 0 990 1 0 1 1 0 8 0 amappl3 88 140 0 130 1 0 1 1 0 8 0 amappl2 80 4106 0 4031 3 1 2 3 0 8 0 amappl1 72 20598 0 20182 25 16 9 20 0 8 0 amappl 80 1475 0 1425 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 68 0 2 2 0 2 2 0 8 0 uaddrrnd 24 627 0 602 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 627 0 602 1 0 1 1 0 8 0 vmmpekpl 168 8520 0 8493 2 0 2 2 0 8 0 vmmpepl 168 81607 0 79281 182 43 139 178 0 357 36 vmsppl 272 616 0 602 2 1 1 2 0 8 0 pdppl 4096 1260 0 1216 7 1 6 6 0 8 0 pvpl 32 248418 0 224775 239 11 228 228 0 265 32 pmappl 200 626 0 604 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 210 0 75 5 0 5 5 0 8 0