uvm_fault(0xffffffff825857c0, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff825857c0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023de1b38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023de1970, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800023de1b38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023de1980) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806edee348,ffff800023de1b38,10,fffffd807f7bfa80) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80675d8e58,ffff800023de1b38,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020a929d8,f0,ffff800023de1b38,0,ffff800023de1c20) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020a929d8,ffff800023de1bd0,ffff800023de1c20) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023de1ca0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023de1ca0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaa6670f36f0, count: -8 ddb{0}> show registers rdi 0 rsi 0x3c6 rbp 0xffff800023de18c0 rbx 0xfffffd0000000000 rdx 0x12b rcx 0xffff800000a17ac0 rax 0xffffffff81005653 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x20ca84510eb00652 r11 0x714b6f6ec5f0f107 r12 0 r13 0x3c6 r14 0xffff800000a24660 r15 0xffff800023de1b38 rip 0xffffffff81005658 tun_dev_read+0x138 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800023de1860 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=111541 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020a92eb8,0xffffffff8263a570 process=0xffff800020ac6028 user=0xffff800023ddc000, vmspace=0xfffffd806318d460 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77930 432816 28635 0 2 0 syz-executor.0 77930 477673 28635 0 3 0x4000080 bell syz-executor.0 *77930 111541 28635 0 7 0x4000000 syz-executor.0 87197 355844 20044 0 7 0x480 syz-executor.1 87197 333518 20044 0 3 0x4000080 select syz-executor.1 87197 34238 20044 0 3 0x4000080 fsleep syz-executor.1 95585 348025 0 0 3 0x14200 bored sosplice 20044 367819 58639 0 3 0x82 nanosleep syz-executor.1 28635 409289 58639 0 2 0x482 syz-executor.0 58639 7296 11908 0 3 0x82 thrsleep syz-fuzzer 58639 117424 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 201758 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 411283 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 217558 11908 0 3 0x4000082 kqread syz-fuzzer 58639 37504 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 385423 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 338009 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 437941 11908 0 3 0x4000082 thrsleep syz-fuzzer 58639 172533 11908 0 3 0x4000082 thrsleep syz-fuzzer 11908 252293 44124 0 3 0x10008a pause ksh 44124 283260 92701 0 3 0x92 select sshd 40995 144782 1 0 3 0x100083 ttyopn getty 92701 84290 1 0 3 0x80 select sshd 21278 303585 85466 74 3 0x100092 bpf pflogd 85466 227761 1 0 3 0x80 netio pflogd 49541 234786 89494 73 3 0x100090 kqread syslogd 89494 318748 1 0 3 0x100082 netio syslogd 12353 422658 1 77 3 0x100090 poll dhclient 88058 207651 1 0 3 0x80 poll dhclient 96432 360660 0 0 3 0x14200 bored smr 85663 520590 0 0 3 0x14200 pgzero zerothread 54198 70413 0 0 3 0x14200 aiodoned aiodoned 64023 289641 0 0 3 0x14200 syncer update 68125 296921 0 0 3 0x14200 cleaner cleaner 94231 406355 0 0 3 0x14200 reaper reaper 42238 96247 0 0 3 0x14200 pgdaemon pagedaemon 10773 477470 0 0 3 0x14200 bored crynlk 59479 71442 0 0 3 0x14200 bored crypto 65277 285080 0 0 3 0x40014200 acpi0 acpi0 68726 273635 0 0 3 0x40014200 idle1 42200 188769 0 0 3 0x14200 bored softnet 87473 161060 0 0 3 0x14200 bored systqmp 21522 477268 0 0 3 0x14200 bored systq 71601 283982 0 0 2 0x40014200 softclock 6694 15397 0 0 3 0x40014200 idle0 1 212805 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 77930 (syz-executor.0) thread 0xffff800020a929d8 (111541) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82634b10) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #3 sys_read+0x83 sys/kern/sys_generic.c:157 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9546 6424K 7327K 78643K 12408 0 pcb 14 8K 8K 78643K 269 0 rtable 113 4K 4K 78643K 512 0 ifaddr 99 20K 21K 78643K 252 0 counters 43 33K 34K 78643K 97 0 ioctlops 0 0K 4K 78643K 1555 0 iov 0 0K 16K 78643K 177 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 78K 78643K 1836 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 287 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 867 0 sigio 0 0K 0K 78643K 53 0 proc 63 63K 95K 78643K 517 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 1K 78643K 3281 0 in_multi 100 4K 4K 78643K 592 0 ether_multi 1 0K 0K 78643K 80 0 mrt 0 0K 0K 78643K 8 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 1K 78643K 260 0 pfkey data 0 0K 0K 78643K 2 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 148 137K 137K 78643K 4008 0 UVM aobj 62 3K 3K 78643K 67 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 1K 78643K 206 0 NDP 14 0K 0K 78643K 47 0 temp 142 3030K 3106K 78643K 21827 0 kqueue 3 4K 20K 78643K 87 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 arp 64 14 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 93 0 91 1 0 1 1 0 8 0 rtentry 112 75 0 30 2 0 2 2 0 8 0 unpcb 120 875 0 865 4 2 2 2 0 8 1 syncache 264 9 0 9 4 3 1 1 0 8 1 tcpqe 32 221 0 221 3 2 1 1 0 8 1 tcpcb 544 1895 0 1888 3 1 2 2 0 8 1 inpcb 280 2939 0 2924 4 2 2 3 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 11 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1128 4 0 4 4 3 1 1 0 8 1 pffrag 232 10 0 7 3 2 1 1 0 482 0 pffrnode 88 9 0 7 3 2 1 1 0 8 0 pffrent 40 288 0 271 3 2 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 96 0 26 1 0 1 1 0 8 0 pfstkey 112 96 0 26 2 0 2 2 0 8 0 pfstate 328 96 0 26 6 0 6 6 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 295 0 98 15 0 15 15 0 8 0 art_table 32 297 0 98 2 0 2 2 0 8 0 art_node 16 73 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 26 1 0 1 1 0 8 0 semupl 112 8 0 8 1 1 0 1 0 8 0 semapl 112 281 0 271 1 0 1 1 0 8 0 shmpl 112 65 0 5 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2715 0 1315 46 0 46 46 0 8 0 ffsino 272 2715 0 1315 95 0 95 95 0 8 0 nchpl 144 4140 0 2533 61 1 60 61 0 8 0 uvmvnodes 72 3169 0 0 58 0 58 58 0 8 0 vnodes 208 3169 0 0 167 0 167 167 0 8 0 namei 1024 12635 0 12635 2 1 1 1 0 8 1 percpumem 16 59 0 27 1 0 1 1 0 8 0 vcpupl 1984 11 0 0 2 0 2 2 0 8 0 vmpool 560 21 0 10 2 1 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 192 13518 0 13518 11 8 3 7 0 8 3 plimitpl 152 80 0 72 1 0 1 1 0 8 0 sigapl 424 1083 0 1050 4 0 4 4 0 8 0 futexpl 56 22041 0 22040 1 0 1 1 0 8 0 knotepl 112 212 0 193 2 1 1 2 0 8 0 kqueuepl 144 220 0 218 1 0 1 1 0 8 0 pipelkpl 48 320 0 310 1 0 1 1 0 8 0 pipepl 120 640 0 621 2 0 2 2 0 8 1 fdescpl 496 1067 0 1050 3 0 3 3 0 8 0 filepl 152 9666 0 9564 12 5 7 8 0 8 2 lockfpl 104 253 0 252 1 0 1 1 0 8 0 lockfspl 48 89 0 88 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 1131 0 1122 1 0 1 1 0 8 0 zombiepl 144 1050 0 1050 2 1 1 1 0 8 1 processpl 960 1083 0 1050 6 1 5 5 0 8 0 procpl 624 3176 0 3130 4 0 4 4 0 8 0 sosppl 128 29 0 29 3 2 1 1 0 8 1 sockpl 400 3926 0 3903 11 4 7 7 0 8 4 mcl64k 65536 23 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 155 0 0 19 0 19 19 0 8 0 mtagpl 80 104 0 0 3 0 3 3 0 8 0 mbufpl 256 1051 0 0 65 0 65 65 0 8 0 bufpl 280 6792 0 525 448 0 448 448 0 8 0 anonpl 16 110870 0 92754 104 21 83 89 0 124 8 amapchunkpl 152 7735 0 7564 29 9 20 21 0 158 12 amappl16 192 5311 0 4318 79 28 51 62 0 8 1 amappl15 184 4 0 2 1 0 1 1 0 8 0 amappl14 176 7 0 5 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 844 0 839 2 1 1 1 0 8 0 amappl11 152 82 0 63 1 0 1 1 0 8 0 amappl10 144 19 0 11 1 0 1 1 0 8 0 amappl9 136 389 0 386 1 0 1 1 0 8 0 amappl8 128 324 0 296 1 0 1 1 0 8 0 amappl7 120 120 0 109 1 0 1 1 0 8 0 amappl6 112 28 0 22 1 0 1 1 0 8 0 amappl5 104 1378 0 1357 1 0 1 1 0 8 0 amappl4 96 524 0 492 2 1 1 2 0 8 0 amappl3 88 144 0 139 1 0 1 1 0 8 0 amappl2 80 7882 0 7800 3 1 2 3 0 8 0 amappl1 72 32460 0 31984 25 14 11 20 0 8 0 amappl 80 3448 0 3391 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 66 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1088 0 1060 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1088 0 1060 1 0 1 1 0 8 0 vmmpekpl 168 11975 0 11937 2 0 2 2 0 8 0 vmmpepl 168 137303 0 134992 138 34 104 115 0 357 3 vmsppl 368 1087 0 1060 3 0 3 3 0 8 0 pdppl 4096 2184 0 2131 7 0 7 7 0 8 0 pvpl 32 332157 0 311045 222 21 201 207 0 265 25 pmappl 232 1087 0 1060 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 241 0 9 7 0 7 7 0 8 0