login: uvm_fault(0xffffffff8263f1f0, 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(0xffffffff8263f1f0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800020f6f828,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800020f6f660, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800020f6f828,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020f6f670) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed4b418,ffff800020f6f828,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067108bf8,ffff800020f6f828,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7878,f0,ffff800020f6f828,0,ffff800020f6f910) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7878,ffff800020f6f8c0,ffff800020f6f910) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020f6f990) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020f6f990) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xff74534ac70, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800020f6f5b0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff8000009d8580 rax 0xffffffff81655a73 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x99e9c303489ae723 r11 0xd68af2757e9525a r12 0 r13 0x3da r14 0xffff800000a29660 r15 0xffff800020f6f828 rip 0xffffffff81655a78 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800020f6f550 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=199753 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec7128,0xffff800020ec6298 process=0xffff800020e93730 user=0xffff800020f6a000, vmspace=0xfffffd807f0008a0 estcpu=30, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 87691 191783 20358 0 2 0 syz-executor.1 *87691 199753 20358 0 7 0x4000000 syz-executor.1 87691 412091 20358 0 3 0x4000080 fsleep syz-executor.1 87691 155392 20358 0 3 0x4000080 fsleep syz-executor.1 9590 5320 1 0 3 0x100083 ttyin getty 11642 25235 0 0 3 0x14200 bored sosplice 20358 513718 89093 0 3 0x82 nanosleep syz-executor.1 3516 372212 89093 0 3 0x82 piperd syz-executor.0 89093 438725 80243 0 3 0x82 thrsleep syz-fuzzer 89093 168400 80243 0 3 0x4000082 nanosleep syz-fuzzer 89093 285773 80243 0 3 0x4000082 thrsleep syz-fuzzer 89093 177808 80243 0 3 0x4000082 thrsleep syz-fuzzer 89093 521805 80243 0 3 0x4000082 thrsleep syz-fuzzer 89093 325637 80243 0 7 0x4000002 syz-fuzzer 89093 124730 80243 0 3 0x4000082 kqread syz-fuzzer 89093 161867 80243 0 3 0x4000082 thrsleep syz-fuzzer 89093 257055 80243 0 3 0x4000082 thrsleep syz-fuzzer 89093 179467 80243 0 3 0x4000082 thrsleep syz-fuzzer 80243 185629 83747 0 3 0x10008a pause ksh 83747 440634 11269 0 3 0x92 select sshd 11269 521072 1 0 3 0x80 select sshd 90222 19959 36089 74 3 0x100092 bpf pflogd 36089 226419 1 0 3 0x80 netio pflogd 52926 504535 25054 73 3 0x100090 kqread syslogd 25054 445465 1 0 3 0x100082 netio syslogd 3213 441173 1 77 3 0x100090 poll dhclient 18117 217734 1 0 3 0x80 poll dhclient 77482 466731 0 0 3 0x14200 bored smr 39208 409325 0 0 3 0x14200 pgzero zerothread 54738 126909 0 0 3 0x14200 aiodoned aiodoned 57802 285702 0 0 3 0x14200 syncer update 15398 296487 0 0 3 0x14200 cleaner cleaner 20096 400637 0 0 3 0x14200 reaper reaper 80948 234462 0 0 3 0x14200 pgdaemon pagedaemon 75050 30815 0 0 3 0x14200 bored crynlk 63386 365105 0 0 3 0x14200 bored crypto 77073 6525 0 0 3 0x40014200 acpi0 acpi0 27001 298442 0 0 3 0x40014200 idle1 68965 424755 0 0 3 0x14200 bored softnet 50873 511017 0 0 3 0x14200 bored systqmp 91977 213977 0 0 3 0x14200 bored systq 43422 500406 0 0 3 0x40014200 bored softclock 68376 477031 0 0 3 0x40014200 idle0 1 424906 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 87691 (syz-executor.1) thread 0xffff800020ec7878 (199753) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82667e30) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9520 6424K 6797K 78643K 10983 0 pcb 13 8K 8K 78643K 90 0 rtable 100 3K 4K 78643K 327 0 ifaddr 76 15K 15K 78643K 108 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 16K 78643K 43 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 77K 78643K 1368 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 50 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 380 0 sigio 0 0K 0K 78643K 5 0 proc 61 63K 83K 78643K 507 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 29 0 in_multi 51 2K 2K 78643K 121 0 ether_multi 1 0K 0K 78643K 15 0 mrt 0 0K 0K 78643K 7 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 244 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 118 22K 26K 78643K 2049 0 UVM aobj 14 4K 4K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 50 0 NDP 12 0K 0K 78643K 26 0 temp 104 3039K 3103K 78643K 11296 0 kqueue 3 4K 12K 78643K 22 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 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 41 0 39 1 0 1 1 0 8 0 rtentry 112 81 0 41 2 0 2 2 0 8 0 unpcb 120 290 0 280 1 0 1 1 0 8 0 syncache 264 7 0 7 3 3 0 1 0 8 0 tcpqe 32 355 0 355 1 1 0 1 0 8 0 tcpcb 544 443 0 439 3 1 2 2 0 8 1 inpcb 280 735 0 728 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 48 14 0 11 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 2 0 2 2 1 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 6 0 6 1 1 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 37 0 12 1 0 1 1 0 8 0 pfstkey 112 37 0 12 1 0 1 1 0 8 0 pfstate 328 37 0 12 3 0 3 3 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 256 380 0 202 13 1 12 12 0 8 0 art_table 32 381 0 202 2 0 2 2 0 8 0 art_node 16 80 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 48 0 38 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1917 0 515 89 0 89 89 0 8 0 ffsino 272 1917 0 515 94 0 94 94 0 8 0 nchpl 144 2715 0 1107 60 0 60 60 0 8 0 uvmvnodes 72 2049 0 0 38 0 38 38 0 8 0 vnodes 208 2049 0 0 108 0 108 108 0 8 0 namei 1024 7304 0 7304 1 0 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vmpool 560 4 0 4 1 1 0 1 0 8 0 scxspl 192 7458 0 7458 8 7 1 7 0 8 1 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 424 597 0 565 4 0 4 4 0 8 0 futexpl 56 5368 0 5366 1 0 1 1 0 8 0 knotepl 112 83 0 64 1 0 1 1 0 8 0 kqueuepl 144 68 0 66 1 0 1 1 0 8 0 pipelkpl 48 119 0 109 1 0 1 1 0 8 0 pipepl 120 238 0 219 1 0 1 1 0 8 0 fdescpl 496 581 0 565 3 0 3 3 0 8 0 filepl 152 3598 0 3498 6 0 6 6 0 8 2 lockfpl 104 75 0 74 1 0 1 1 0 8 0 lockfspl 48 30 0 29 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 41 0 30 1 0 1 1 0 8 0 ucredpl 96 373 0 363 1 0 1 1 0 8 0 zombiepl 144 565 0 565 1 0 1 1 0 8 1 processpl 984 597 0 565 5 0 5 5 0 8 0 procpl 624 1266 0 1222 4 0 4 4 0 8 0 sosppl 128 8 0 8 2 1 1 1 0 8 1 sockpl 400 1071 0 1052 7 2 5 5 0 8 3 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 292 0 0 36 0 36 36 0 8 0 mtagpl 80 29 0 0 1 0 1 1 0 8 0 mbufpl 256 304 0 0 18 0 18 18 0 8 0 bufpl 280 4137 0 135 286 0 286 286 0 8 0 anonpl 16 66960 0 51752 74 12 62 69 0 124 0 amapchunkpl 152 2857 0 2717 11 4 7 11 0 158 0 amappl16 192 2621 0 1806 49 8 41 46 0 8 0 amappl15 184 5 0 2 1 0 1 1 0 8 0 amappl14 176 27 0 20 1 0 1 1 0 8 0 amappl13 168 33 0 31 1 0 1 1 0 8 0 amappl12 160 23 0 18 1 0 1 1 0 8 0 amappl11 152 129 0 113 1 0 1 1 0 8 0 amappl10 144 299 0 294 1 0 1 1 0 8 0 amappl9 136 383 0 382 1 0 1 1 0 8 0 amappl8 128 347 0 317 1 0 1 1 0 8 0 amappl7 120 361 0 347 1 0 1 1 0 8 0 amappl6 112 96 0 90 1 0 1 1 0 8 0 amappl5 104 460 0 443 1 0 1 1 0 8 0 amappl4 96 492 0 461 1 0 1 1 0 8 0 amappl3 88 106 0 100 1 0 1 1 0 8 0 amappl2 80 3389 0 3319 2 0 2 2 0 8 0 amappl1 72 21414 0 20961 24 14 10 18 0 8 0 amappl 80 1521 0 1475 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 585 0 569 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 585 0 569 1 0 1 1 0 8 0 vmmpekpl 168 7850 0 7819 2 0 2 2 0 8 0 vmmpepl 168 74819 0 72831 110 23 87 102 0 357 0 vmsppl 368 584 0 569 2 0 2 2 0 8 0 pdppl 4096 1178 0 1138 6 0 6 6 0 8 0 pvpl 32 211811 0 193443 170 20 150 170 0 265 1 pmappl 232 584 0 569 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 285 0 7 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8248bff0) 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: 0xc00230bad8, count: -3 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800020f6f828,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020f6f670) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed4b418,ffff800020f6f828,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067108bf8,ffff800020f6f828,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7878,f0,ffff800020f6f828,0,ffff800020f6f910) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7878,ffff800020f6f8c0,ffff800020f6f910) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020f6f990) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020f6f990) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xff74534ac70, count: -8