uvm_fault(0xffffffff827cff50, 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(0xffffffff827cff50, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff8000230ff898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff8000230ff6d0, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff8000230ff898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff8000230ff6e0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed17278,ffff8000230ff898,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80681edc00,ffff8000230ff898,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023101d60,f0,ffff8000230ff898,0,ffff8000230ff980) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023101d60,ffff8000230ff930,ffff8000230ff980) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000230ffa00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230ffa00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad2c1654140, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff8000230ff620 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000adb640 rax 0xffffffff81eadd63 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xcd8aae478b2c831f r11 0x270f8eee35882761 r12 0 r13 0x3da r14 0xffff800000af7660 r15 0xffff8000230ff898 rip 0xffffffff81eadd68 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000230ff5c0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=446556 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800023101af0,0xffffffff828b3dc0 process=0xffff800020e00bc0 user=0xffff8000230fa000, vmspace=0xfffffd807f0002e0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62867 9235 481 0 2 0 syz-executor.1 *62867 446556 481 0 7 0x4000000 syz-executor.1 32177 115929 0 0 3 0x14280 nfsidl nfsio 81311 170473 0 0 3 0x14280 nfsidl nfsio 73241 515509 0 0 3 0x14280 nfsidl nfsio 61421 524075 0 0 3 0x14280 nfsidl nfsio 7062 279507 0 0 3 0x14280 nfsidl nfsio 29193 507639 0 0 3 0x14280 nfsidl nfsio 94188 308098 0 0 3 0x14280 nfsidl nfsio 32002 175912 0 0 3 0x14280 nfsidl nfsio 2484 20920 0 0 3 0x14280 nfsidl nfsio 15288 509034 0 0 3 0x14280 nfsidl nfsio 55638 477692 0 0 3 0x14280 nfsidl nfsio 41895 194101 0 0 3 0x14280 nfsidl nfsio 17818 150609 0 0 3 0x14280 nfsidl nfsio 97361 244294 0 0 3 0x14280 nfsidl nfsio 74685 18569 0 0 3 0x14280 nfsidl nfsio 89395 107254 0 0 3 0x14280 nfsidl nfsio 35086 110374 0 0 3 0x14280 nfsidl nfsio 40685 480407 0 0 3 0x14280 nfsidl nfsio 41844 470103 0 0 3 0x14280 nfsidl nfsio 87155 377762 0 0 3 0x14280 nfsidl nfsio 21387 458284 0 0 3 0x14200 bored sosplice 481 420448 73573 0 3 0x82 nanosleep syz-executor.1 43661 150657 73573 0 3 0x82 piperd syz-executor.0 73573 436814 55445 0 3 0x82 thrsleep syz-fuzzer 73573 486340 55445 0 3 0x4000082 nanosleep syz-fuzzer 73573 368719 55445 0 3 0x4000082 thrsleep syz-fuzzer 73573 99364 55445 0 3 0x4000082 thrsleep syz-fuzzer 73573 130861 55445 0 7 0x4000002 syz-fuzzer 73573 152190 55445 0 3 0x4000082 thrsleep syz-fuzzer 73573 62625 55445 0 3 0x4000082 kqread syz-fuzzer 73573 79423 55445 0 3 0x4000082 thrsleep syz-fuzzer 73573 258146 55445 0 3 0x4000082 thrsleep syz-fuzzer 73573 491099 55445 0 3 0x4000082 thrsleep syz-fuzzer 55445 502868 44293 0 3 0x10008a pause ksh 44293 397467 97808 0 3 0x92 select sshd 39519 13322 1 0 3 0x100083 ttyin getty 97808 184475 1 0 3 0x80 select sshd 81863 447463 24475 74 3 0x100092 bpf pflogd 24475 305024 1 0 3 0x80 netio pflogd 45154 115018 30810 73 3 0x100090 kqread syslogd 30810 269796 1 0 3 0x100082 netio syslogd 70364 479490 1 77 3 0x100090 poll dhclient 40581 301105 1 0 3 0x80 poll dhclient 83562 71645 0 0 3 0x14200 bored smr 89615 408220 0 0 2 0x14200 zerothread 5374 89787 0 0 3 0x14200 aiodoned aiodoned 95002 40869 0 0 3 0x14200 syncer update 37460 69555 0 0 3 0x14200 cleaner cleaner 2380 486339 0 0 3 0x14200 reaper reaper 25372 203349 0 0 3 0x14200 pgdaemon pagedaemon 35201 13650 0 0 3 0x14200 bored crynlk 17029 244484 0 0 3 0x14200 bored crypto 12693 183364 0 0 3 0x40014200 acpi0 acpi0 3958 112972 0 0 3 0x40014200 idle1 53246 162164 0 0 3 0x14200 bored softnet 59242 465428 0 0 3 0x14200 bored systqmp 60963 467398 0 0 3 0x14200 bored systq 81197 33171 0 0 3 0x40014200 bored softclock 79697 257396 0 0 3 0x40014200 idle0 1 347462 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 62867 (syz-executor.1) thread 0xffff800023101d60 (446556) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82911f98) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 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 9543 6425K 7060K 78643K 12853 0 pcb 13 8K 8K 78643K 236 0 rtable 134 19K 21K 78643K 605 0 ifaddr 98 18K 19K 78643K 205 0 counters 43 33K 34K 78643K 63 0 ioctlops 0 0K 4K 78643K 3550 0 iov 0 0K 24K 78643K 123 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1817 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 23 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 2209 0 sigio 0 0K 0K 78643K 152 0 proc 64 63K 95K 78643K 518 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 0K 78643K 684 0 in_multi 67 3K 3K 78643K 219 0 ether_multi 1 0K 0K 78643K 13 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 267 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 133 40K 41K 78643K 7444 0 UVM aobj 59 4K 4K 78643K 64 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 276 0 NDP 15 0K 0K 78643K 43 0 temp 141 3868K 3934K 78643K 13338 0 kqueue 3 4K 12K 78643K 49 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 13 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 114 0 74 2 0 2 2 0 8 0 unpcb 120 804 0 794 1 0 1 1 0 8 0 syncache 264 11 0 11 4 3 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 2273 0 2273 3 2 1 1 0 8 1 tcpcb 544 1640 0 1632 4 2 2 2 0 8 1 inpcb 296 3015 0 3002 5 3 2 2 0 8 0 rttmr 72 3 0 3 3 3 0 1 0 8 0 nd6 48 27 0 23 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 3 0 1 0 8 0 ppxss 1128 3 0 3 3 2 1 1 0 8 1 pffrag 232 2 0 1 2 1 1 1 0 482 0 pffrnode 88 2 0 1 2 1 1 1 0 8 0 pffrent 40 47 0 46 2 1 1 1 0 8 0 pfosfp 40 972 0 854 6 4 2 5 0 8 0 pfosfpen 112 1970 0 1458 29 14 15 22 0 8 0 pfrktable 1344 59 0 46 2 0 2 2 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 0 1 0 1 1 0 8 0 pfstitem 24 11 0 9 1 0 1 1 0 8 0 pfstkey 112 11 0 9 1 0 1 1 0 8 0 pfstate 328 11 0 9 1 0 1 1 0 8 0 pfrule 1360 41 0 24 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 407 0 234 13 1 12 12 0 8 0 art_table 32 408 0 234 2 0 2 2 0 8 0 art_node 16 113 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 12 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 62 0 5 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3887 0 2483 91 2 89 89 0 8 1 ffsino 272 3887 0 2483 95 1 94 94 0 8 0 nchpl 144 7483 0 5872 60 0 60 60 0 8 0 uvmvnodes 72 4436 0 0 81 0 81 81 0 8 0 vnodes 208 4436 0 0 234 0 234 234 0 8 0 namei 1024 20200 0 20200 5 4 1 1 0 8 1 percpumem 16 42 0 10 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 20 0 12 1 0 1 1 0 8 0 scxspl 192 20011 0 20011 10 9 1 7 0 8 1 plimitpl 152 64 0 56 1 0 1 1 0 8 0 sigapl 424 2445 0 2393 6 0 6 6 0 8 0 futexpl 56 26449 0 26449 4 3 1 1 0 8 1 knotepl 112 116 0 97 1 0 1 1 0 8 0 kqueuepl 144 387 0 384 1 0 1 1 0 8 0 pipelkpl 48 294 0 284 1 0 1 1 0 8 0 pipepl 120 588 0 569 2 0 2 2 0 8 1 fdescpl 496 2409 0 2393 3 0 3 3 0 8 0 filepl 152 13686 0 13586 7 1 6 6 0 8 2 lockfpl 104 347 0 346 1 0 1 1 0 8 0 lockfspl 48 111 0 110 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 28 0 17 1 0 1 1 0 8 0 ucredpl 96 849 0 838 1 0 1 1 0 8 0 zombiepl 144 2393 0 2393 2 1 1 1 0 8 1 processpl 984 2445 0 2393 8 1 7 7 0 8 0 procpl 624 6672 0 6610 6 0 6 6 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 9 0 9 3 2 1 1 0 8 1 sockpl 400 3895 0 3870 9 5 4 4 0 8 1 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 13 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 237 0 0 29 0 29 29 0 8 0 mtagpl 96 147 0 0 4 0 4 4 0 8 0 mbufpl 256 498 0 0 27 0 27 27 0 8 0 bufpl 280 6377 0 142 446 0 446 446 0 8 0 anonpl 16 182211 0 165263 100 23 77 84 0 124 8 amapchunkpl 152 12108 0 11946 21 9 12 14 0 158 5 amappl16 192 10493 0 9575 70 23 47 58 0 8 1 amappl15 184 1250 0 1246 1 0 1 1 0 8 0 amappl14 176 34 0 26 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 5 0 3 1 0 1 1 0 8 0 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 18 0 13 1 0 1 1 0 8 0 amappl9 136 1318 0 1316 1 0 1 1 0 8 0 amappl8 128 1276 0 1238 2 0 2 2 0 8 0 amappl7 120 118 0 106 1 0 1 1 0 8 0 amappl6 112 26 0 23 2 1 1 1 0 8 0 amappl5 104 2264 0 2247 1 0 1 1 0 8 0 amappl4 96 495 0 465 1 0 1 1 0 8 0 amappl3 88 184 0 178 1 0 1 1 0 8 0 amappl2 80 19264 0 19192 2 0 2 2 0 8 0 amappl1 72 55979 0 55539 23 13 10 18 0 8 0 amappl 80 6890 0 6843 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 63 0 5 1 0 1 1 0 8 0 uaddrrnd 24 2411 0 2393 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2411 0 2393 1 0 1 1 0 8 0 vmmpekpl 168 19793 0 19757 2 0 2 2 0 8 0 vmmpepl 168 285179 0 283091 144 49 95 112 0 357 2 vmsppl 368 2410 0 2393 2 0 2 2 0 8 0 pdppl 4096 4829 0 4788 11 5 6 6 0 8 0 pvpl 32 543504 0 523539 237 47 190 200 0 265 26 pmappl 232 2410 0 2393 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 308 0 23 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff8000230ff898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff8000230ff6e0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed17278,ffff8000230ff898,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80681edc00,ffff8000230ff898,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023101d60,f0,ffff8000230ff898,0,ffff8000230ff980) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023101d60,ffff8000230ff930,ffff8000230ff980) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000230ffa00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230ffa00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xad2c1654140, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d70ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 end of kernel end trace frame: 0xc0029125f0, count: -3