uvm_fault(0xffffffff8260a938, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffffff8260a938, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800021f8d6e8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f8d520, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800021f8d6e8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f8d530) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e76d008,ffff800021f8d6e8,10,fffffd807f7bf840) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066d70998,ffff800021f8d6e8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec6c48,f0,ffff800021f8d6e8,0,ffff800021f8d7d0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec6c48,ffff800021f8d780,ffff800021f8d7d0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f8d850) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f8d850) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1b71a761140, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f8d470 rbx 0xfffffd0000000000 rdx 0x12f rcx 0xffff800000a1c800 rax 0xffffffff81622e23 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xa15218a0258d39a r11 0x1084298a5dce516b r12 0 r13 0x3da r14 0xffff8000009d5660 r15 0xffff800021f8d6e8 rip 0xffffffff81622e28 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f8d410 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=447463 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec6018,0xffffffff82669f00 process=0xffff800020e93b08 user=0xffff800021f88000, vmspace=0xfffffd80673a7b90 estcpu=30, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 53210 351299 9125 0 2 0 syz-executor.0 *53210 447463 9125 0 7 0x4000000 syz-executor.0 53625 401946 0 0 3 0x14200 bored sosplice 2532 122689 45386 0 3 0x82 nanosleep syz-executor.1 9125 431626 45386 0 3 0x82 nanosleep syz-executor.0 45386 514982 56754 0 3 0x82 thrsleep syz-fuzzer 45386 479016 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 296964 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 79490 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 201982 56754 0 3 0x4000082 kqread syz-fuzzer 45386 136746 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 455198 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 227648 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 444303 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 280878 56754 0 3 0x4000082 thrsleep syz-fuzzer 45386 286179 56754 0 3 0x4000082 thrsleep syz-fuzzer 56754 348838 19227 0 3 0x10008a pause ksh 19227 21183 86073 0 3 0x92 select sshd 67549 346018 1 0 3 0x100083 ttyopn getty 86073 385759 1 0 3 0x80 select sshd 45871 373816 46984 74 3 0x100092 bpf pflogd 46984 125198 1 0 3 0x80 netio pflogd 9941 93344 99966 73 3 0x100090 kqread syslogd 99966 291502 1 0 3 0x100082 netio syslogd 58545 146850 1 77 3 0x100090 poll dhclient 86513 405719 1 0 3 0x80 poll dhclient 72354 309255 0 0 3 0x14200 bored smr 70842 470012 0 0 3 0x14200 pgzero zerothread 81742 150878 0 0 3 0x14200 aiodoned aiodoned 63820 124689 0 0 3 0x14200 syncer update 71700 26143 0 0 3 0x14200 cleaner cleaner 82787 394243 0 0 7 0x14200 reaper 32362 353027 0 0 3 0x14200 pgdaemon pagedaemon 72540 489968 0 0 3 0x14200 bored crynlk 13360 331456 0 0 3 0x14200 bored crypto 22678 241061 0 0 3 0x40014200 acpi0 acpi0 73304 80439 0 0 3 0x40014200 idle1 11914 7023 0 0 3 0x14200 bored softnet 52344 155229 0 0 3 0x14200 bored systqmp 22756 399745 0 0 3 0x14200 bored systq 7874 99076 0 0 3 0x40014200 bored softclock 49117 455644 0 0 3 0x40014200 idle0 1 46973 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 53210 (syz-executor.0) thread 0xffff800020ec6c48 (447463) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82656c38) #0 witness_lock+0x4c5 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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9622 6693K 7258K 78643K 13795 0 pcb 13 8K 8K 78643K 145 0 rtable 119 4K 5K 78643K 374 0 ifaddr 98 18K 19K 78643K 208 0 counters 45 34K 34K 78643K 87 0 ioctlops 0 0K 4K 78643K 1507 0 iov 0 0K 32K 78643K 92 0 mount 1 1K 1K 78643K 1 0 vnodes 1229 77K 78K 78643K 1996 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 13 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 38 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 700 0 sigio 0 0K 0K 78643K 12 0 proc 61 63K 95K 78643K 519 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 55 0 in_multi 71 3K 3K 78643K 149 0 ether_multi 1 0K 0K 78643K 32 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 243 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 116 86K 90K 78643K 3220 0 UVM aobj 42 2K 2K 78643K 46 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 152 0 NDP 16 0K 0K 78643K 41 0 temp 130 3046K 3467K 78643K 11519 0 kqueue 3 4K 12K 78643K 45 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 9 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 40 0 38 1 0 1 1 0 8 0 rtentry 112 51 0 3 2 0 2 2 0 8 0 unpcb 120 332 0 322 1 0 1 1 0 8 0 syncache 264 12 0 12 3 2 1 1 0 8 1 tcpqe 32 111 0 111 1 1 0 1 0 8 0 tcpcb 544 1041 0 1037 3 2 1 2 0 8 0 inpcb 280 1532 0 1525 3 1 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 7 0 6 3 2 1 1 0 8 0 pffrag 232 5 0 5 2 2 0 1 0 482 0 pffrnode 88 5 0 5 2 2 0 1 0 8 0 pffrent 40 98 0 98 2 2 0 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 69 0 11 1 0 1 1 0 8 0 pfstkey 112 69 0 11 2 0 2 2 0 8 0 pfstate 328 69 0 11 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 205 0 6 13 0 13 13 0 8 0 art_table 32 206 0 6 2 0 2 2 0 8 0 art_node 16 50 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 36 0 26 1 0 1 1 0 8 0 shmpl 112 44 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2373 0 966 46 0 46 46 0 8 0 ffsino 272 2373 0 966 95 0 95 95 0 8 0 nchpl 144 3488 0 1865 61 0 61 61 0 8 0 uvmvnodes 72 3088 0 0 57 0 57 57 0 8 0 vnodes 208 3088 0 0 163 0 163 163 0 8 0 namei 1024 10719 0 10719 1 0 1 1 0 8 1 percpumem 16 54 0 21 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 1 1 0 1 1 0 8 0 scxspl 192 10716 0 10716 9 8 1 7 0 8 1 plimitpl 152 62 0 54 1 0 1 1 0 8 0 sigapl 424 918 0 886 4 0 4 4 0 8 0 futexpl 56 11825 0 11825 1 0 1 1 0 8 1 knotepl 112 108 0 89 1 0 1 1 0 8 0 kqueuepl 144 117 0 114 1 0 1 1 0 8 0 pipelkpl 48 168 0 158 1 0 1 1 0 8 0 pipepl 120 336 0 317 2 1 1 2 0 8 0 fdescpl 496 900 0 884 3 0 3 3 0 8 0 filepl 152 6601 0 6499 6 1 5 6 0 8 1 lockfpl 104 214 0 213 1 0 1 1 0 8 0 lockfspl 48 84 0 83 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 569 0 560 1 0 1 1 0 8 0 zombiepl 144 886 0 885 1 0 1 1 0 8 0 processpl 984 918 0 885 5 0 5 5 0 8 0 procpl 624 2434 0 2390 4 0 4 4 0 8 0 sosppl 128 16 0 16 1 0 1 1 0 8 1 sockpl 400 1907 0 1888 7 3 4 6 0 8 2 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 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 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 209 0 0 26 0 26 26 0 8 0 mtagpl 80 53 0 0 2 0 2 2 0 8 0 mbufpl 256 318 0 0 19 0 19 19 0 8 0 bufpl 280 5579 0 179 386 0 386 386 0 8 0 anonpl 16 92134 0 77529 86 11 75 75 0 124 14 amapchunkpl 152 5412 0 5267 24 13 11 20 0 158 4 amappl16 192 4372 0 3549 62 13 49 53 0 8 7 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 16 0 14 2 1 1 1 0 8 0 amappl13 168 25 0 24 1 0 1 1 0 8 0 amappl12 160 3 0 3 1 1 0 1 0 8 0 amappl11 152 72 0 53 1 0 1 1 0 8 0 amappl10 144 339 0 331 1 0 1 1 0 8 0 amappl9 136 740 0 735 1 0 1 1 0 8 0 amappl8 128 650 0 634 1 0 1 1 0 8 0 amappl7 120 435 0 422 1 0 1 1 0 8 0 amappl6 112 25 0 20 1 0 1 1 0 8 0 amappl5 104 805 0 788 1 0 1 1 0 8 0 amappl4 96 508 0 475 2 1 1 2 0 8 0 amappl3 88 116 0 110 1 0 1 1 0 8 0 amappl2 80 6267 0 6188 3 1 2 3 0 8 0 amappl1 72 29027 0 28571 26 16 10 20 0 8 0 amappl 80 2697 0 2645 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 45 0 4 1 0 1 1 0 8 0 uaddrrnd 24 908 0 885 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 908 0 885 1 0 1 1 0 8 0 vmmpekpl 168 10187 0 10154 2 0 2 2 0 8 0 vmmpepl 168 114797 0 112746 124 22 102 105 0 357 11 vmsppl 368 907 0 884 3 0 3 3 0 8 0 pdppl 4096 1824 0 1775 7 0 7 7 0 8 0 pvpl 32 275146 0 257428 189 9 180 180 0 265 32 pmappl 232 907 0 884 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 192 0 8 6 0 6 6 0 8 0