login: uvm_fault(0xffffffff82531700, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff82531700, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(ffff800000a1c000,ffff800022b9b3b8,10) at tun_dev_read+0x2ab sys/net/if_tun.c:826 end trace frame: 0xffff800022b9b1f0, count: 0 ddb{0}> trace tun_dev_read(ffff800000a1c000,ffff800022b9b3b8,10) at tun_dev_read+0x2ab sys/net/if_tun.c:826 spec_read(ffff800022b9b200) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e4c5348,ffff800022b9b3b8,10,fffffd807f7c6960) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd806557ce58,ffff800022b9b3b8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020a99650,f0,ffff800022b9b3b8,0,ffff800022b9b4a0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020a99650,ffff800022b9b450,ffff800022b9b4a0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800022b9b520) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b9b520) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1d95ceb02c0, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800022b9b140 rbx 0x3da rdx 0x151 rcx 0xffff8000009cb540 rax 0xffffffff8135bdd1 tun_dev_read+0x2a1 r8 0x7f7fffffc000 r9 0x5 r10 0x5668a7c18c008cc0 r11 0xcdab493129a403c7 r12 0xffff800022b9b3b8 r13 0x10 r14 0xfffffd0000000000 r15 0 rip 0xffffffff8135bddb tun_dev_read+0x2ab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800022b9b0d0 ss 0x10 tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb{0}> show proc PROC (syz-executor.1) pid=142689 stat=onproc flags process=0 proc=4000000 pri=67, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff800020a98018,0xffff800020a982a0 process=0xffff800020a9ae30 user=0xffff800022b96000, vmspace=0xfffffd807f005a10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10121 218328 82984 0 7 0 syz-executor.1 *10121 142689 82984 0 7 0x4000000 syz-executor.1 10121 137835 82984 0 3 0x4000080 fsleep syz-executor.1 16589 397560 76513 0 2 0 syz-executor.0 16589 105809 76513 0 3 0x4000080 fsleep syz-executor.0 19323 437295 1 0 3 0x100083 ttyin getty 76513 478357 11993 0 2 0x482 syz-executor.0 86590 374045 0 0 3 0x14200 bored sosplice 82984 255776 11993 0 2 0x482 syz-executor.1 11993 495439 8357 0 2 0x482 syz-fuzzer 11993 254516 8357 0 2 0x4000482 syz-fuzzer 11993 102708 8357 0 3 0x4000082 kqread syz-fuzzer 11993 173261 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 295720 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 293622 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 275359 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 515561 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 330347 8357 0 3 0x4000082 thrsleep syz-fuzzer 11993 113314 8357 0 3 0x4000082 thrsleep syz-fuzzer 8357 149601 33619 0 3 0x10008a pause ksh 33619 108382 86477 0 3 0x92 select sshd 86477 48781 1 0 3 0x80 select sshd 76553 212332 397 74 3 0x100092 bpf pflogd 397 300655 1 0 3 0x80 netio pflogd 2378 494502 47492 73 3 0x100090 kqread syslogd 47492 493035 1 0 3 0x100082 netio syslogd 65966 484275 0 0 2 0x14200 zerothread 42441 342039 0 0 3 0x14200 aiodoned aiodoned 18314 372776 0 0 3 0x14200 syncer update 30628 379561 0 0 3 0x14200 cleaner cleaner 45354 394830 0 0 3 0x14200 reaper reaper 32377 326073 0 0 3 0x14200 pgdaemon pagedaemon 73795 160407 0 0 3 0x14200 bored crynlk 75907 380877 0 0 3 0x14200 bored crypto 66958 222878 0 0 3 0x14200 bored viomb 99614 40861 0 0 3 0x40014200 acpi0 acpi0 59976 66212 0 0 3 0x40014200 idle1 59558 337623 0 0 3 0x14200 bored softnet 49328 121098 0 0 3 0x14200 bored systqmp 23793 477965 0 0 3 0x14200 bored systq 88627 240766 0 0 2 0x40014200 softclock 421 8334 0 0 3 0x40014200 idle0 50604 307715 0 0 3 0x14200 bored smr 1 407766 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10121 (syz-executor.1) thread 0xffff800020a99650 (142689) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8265cfc8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a2 sys/kern/sys_generic.c:236 #3 sys_read+0x83 sys/kern/sys_generic.c:156 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9561 6397K 7497K 78643K 13003 0 pcb 13 10K 12K 78643K 174 0 rtable 103 12K 12K 78643K 453 0 ifaddr 91 17K 17K 78643K 264 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1486 0 iov 0 0K 128K 78643K 355 0 mount 1 1K 1K 78643K 1 0 vnodes 1230 77K 77K 78643K 1961 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 218 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1810 197K 290K 78643K 12817 0 file desc 6 17K 25K 78643K 715 0 sigio 1 0K 0K 78643K 17 0 proc 56 51K 95K 78643K 652 0 subproc 32 2K 2K 78643K 87 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 63 0 in_multi 72 3K 4K 78643K 157 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 120 530K 530K 78643K 120 0 exec 0 0K 1K 78643K 312 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 130 23K 32K 78643K 3729 0 UVM aobj 68 5K 5K 78643K 70 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 2 0K 1K 78643K 184 0 NDP 16 0K 0K 78643K 60 0 temp 155 3037K 3131K 78643K 32768 0 kqueue 0 0K 0K 78643K 7 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 17 0 13 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 66 0 66 1 0 1 1 0 8 1 rtentry 112 104 0 64 2 0 2 2 0 8 0 unpcb 120 1518 0 1508 3 2 1 2 0 8 0 syncache 264 9 0 9 4 4 0 1 0 8 0 tcpqe 32 103 0 103 2 2 0 1 0 8 0 tcpcb 544 601 0 595 15 14 1 14 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 2 0 2 1 0 1 1 0 8 1 inpcb 280 1597 0 1591 11 9 2 9 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 14 0 11 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 ppxss 1128 18 0 18 3 3 0 1 0 8 0 pffrag 232 18 0 18 6 5 1 1 0 482 1 pffrnode 88 18 0 18 6 5 1 1 0 8 1 pffrent 40 642 0 642 6 5 1 1 0 8 1 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 92 0 34 1 0 1 1 0 8 0 pfstkey 112 92 0 34 2 0 2 2 0 8 0 pfstate 328 92 0 34 6 0 6 6 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 3 0 1 3 1 2 3 0 8 0 art_heap4 256 551 0 325 18 3 15 16 0 8 0 art_table 32 554 0 326 3 0 3 3 0 8 0 art_node 16 103 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 68 0 44 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 210 0 200 1 0 1 1 0 8 0 shmpl 112 68 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2463 0 1056 46 0 46 46 0 8 0 ffsino 272 2463 0 1056 95 0 95 95 0 8 0 nchpl 144 3832 0 2231 61 0 61 61 0 8 0 uvmvnodes 72 3071 0 0 56 0 56 56 0 8 0 vnodes 208 3071 0 0 162 0 162 162 0 8 0 namei 1024 12755 0 12755 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 11528 0 11528 14 13 1 7 0 8 1 plimitpl 152 68 0 60 1 0 1 1 0 8 0 sigapl 432 906 0 892 3 1 2 3 0 8 0 futexpl 56 17072 0 17070 1 0 1 1 0 8 0 knotepl 112 165 0 145 1 0 1 1 0 8 0 kqueuepl 104 362 0 359 4 3 1 4 0 8 0 pipepl 160 650 0 631 5 4 1 2 0 8 0 fdescpl 488 907 0 892 3 0 3 3 0 8 0 filepl 152 9054 0 8960 19 13 6 14 0 8 2 lockfpl 104 312 0 312 1 0 1 1 0 8 1 lockfspl 48 103 0 103 1 0 1 1 0 8 1 sessionpl 112 22 0 13 1 0 1 1 0 8 0 pgrppl 48 26 0 17 1 0 1 1 0 8 0 ucredpl 96 1168 0 1160 1 0 1 1 0 8 0 zombiepl 144 892 0 892 1 0 1 1 0 8 1 processpl 904 924 0 892 4 0 4 4 0 8 0 procpl 632 2732 0 2688 5 0 5 5 0 8 1 srpgc 64 8 0 8 4 4 0 1 0 8 0 sosppl 128 230 0 230 1 0 1 1 0 8 1 sockpl 384 3203 0 3187 19 15 4 14 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 281 0 0 35 0 35 35 0 8 0 mtagpl 80 53 0 0 2 0 2 2 0 8 0 mbufpl 256 376 0 0 20 0 20 20 0 8 0 bufpl 280 8618 0 1548 506 0 506 506 0 8 0 anonpl 16 120405 0 101030 111 27 84 98 0 125 3 amapchunkpl 152 7206 0 7050 23 15 8 14 0 158 1 amappl16 192 4818 0 3725 81 18 63 67 0 8 8 amappl15 184 118 0 110 1 0 1 1 0 8 0 amappl14 176 48 0 44 1 0 1 1 0 8 0 amappl13 168 2 0 1 1 0 1 1 0 8 0 amappl12 160 44 0 42 2 1 1 1 0 8 0 amappl11 152 501 0 491 1 0 1 1 0 8 0 amappl10 144 26 0 19 1 0 1 1 0 8 0 amappl9 136 641 0 638 1 0 1 1 0 8 0 amappl8 128 174 0 137 2 0 2 2 0 8 0 amappl7 120 122 0 109 1 0 1 1 0 8 0 amappl6 112 503 0 493 1 0 1 1 0 8 0 amappl5 104 195 0 184 1 0 1 1 0 8 0 amappl4 96 1175 0 1141 1 0 1 1 0 8 0 amappl3 88 139 0 130 1 0 1 1 0 8 0 amappl2 80 6169 0 6091 3 1 2 3 0 8 0 amappl1 72 31145 0 30710 27 17 10 21 0 8 0 amappl 80 3070 0 3024 2 0 2 2 0 84 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 64 69 0 2 2 0 2 2 0 8 0 uaddrrnd 24 907 0 892 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 907 0 892 1 0 1 1 0 8 0 vmmpekpl 168 12067 0 12039 2 0 2 2 0 8 0 vmmpepl 168 122001 0 119674 198 57 141 141 0 357 39 vmsppl 368 906 0 892 2 0 2 2 0 8 0 pdppl 4096 1821 0 1784 6 1 5 6 0 8 0 pvpl 32 335128 0 312430 249 46 203 225 0 265 13 pmappl 232 906 0 892 2 1 1 2 0 8 0 extentpl 40 50 0 32 1 0 1 1 0 8 0 phpool 112 213 0 22 6 0 6 6 0 8 0