login: uvm_fault(0xffffffff82633478, 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(0xffffffff82633478, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800020ec2e78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800020ec2cb0, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800020ec2e78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020ec2cc0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e44b1a8,ffff800020ec2e78,10,fffffd807f7bf960) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066cc1998,ffff800020ec2e78,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed6288,f0,ffff800020ec2e78,0,ffff800020ec2f60) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed6288,ffff800020ec2f10,ffff800020ec2f60) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ec2fe0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ec2fe0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd2a9e6e7f50, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800020ec2c00 rbx 0xfffffd0000000000 rdx 0x4f4 rcx 0xffff800000a1cd80 rax 0xffffffff8140cde3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xb4eab77dd4f27697 r11 0x601c8e5ccf772d30 r12 0 r13 0x3da r14 0xffff8000009d5660 r15 0xffff800020ec2e78 rip 0xffffffff8140cde8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800020ec2ba0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=15871 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed6c48,0xffffffff8268e860 process=0xffff800020e93358 user=0xffff800020ebe000, vmspace=0xfffffd806e959738 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50339 455995 13506 0 2 0 syz-executor.0 *50339 15871 13506 0 7 0x4000000 syz-executor.0 35719 122770 1 0 3 0x100083 ttyin getty 997 480546 0 0 3 0x14200 bored sosplice 83077 99312 31346 0 3 0x82 piperd syz-executor.1 13506 21036 31346 0 3 0x82 nanosleep syz-executor.0 31346 50030 34467 0 3 0x82 thrsleep syz-fuzzer 31346 490440 34467 0 3 0x4000082 nanosleep syz-fuzzer 31346 194372 34467 0 7 0x4000002 syz-fuzzer 31346 36548 34467 0 3 0x4000082 thrsleep syz-fuzzer 31346 403152 34467 0 3 0x4000082 thrsleep syz-fuzzer 31346 287850 34467 0 3 0x4000082 thrsleep syz-fuzzer 31346 194255 34467 0 3 0x4000082 thrsleep syz-fuzzer 31346 48317 34467 0 3 0x4000082 thrsleep syz-fuzzer 31346 310376 34467 0 3 0x4000082 kqread syz-fuzzer 31346 117814 34467 0 3 0x4000082 thrsleep syz-fuzzer 34467 403184 2064 0 3 0x10008a pause ksh 2064 163155 91993 0 3 0x92 select sshd 91993 117568 1 0 3 0x80 select sshd 5311 412589 42831 74 3 0x100092 bpf pflogd 42831 329754 1 0 3 0x80 netio pflogd 70317 446592 17078 73 3 0x100090 kqread syslogd 17078 291026 1 0 3 0x100082 netio syslogd 54051 405294 1 77 3 0x100090 poll dhclient 81630 375992 1 0 3 0x80 poll dhclient 76433 377808 0 0 3 0x14200 bored smr 87225 439708 0 0 2 0x14200 zerothread 30377 42568 0 0 3 0x14200 aiodoned aiodoned 72151 510893 0 0 3 0x14200 syncer update 10893 107180 0 0 3 0x14200 cleaner cleaner 668 411040 0 0 3 0x14200 reaper reaper 14126 280791 0 0 3 0x14200 pgdaemon pagedaemon 47457 319208 0 0 3 0x14200 bored crynlk 37933 236367 0 0 3 0x14200 bored crypto 17909 410263 0 0 3 0x40014200 acpi0 acpi0 22792 13367 0 0 3 0x40014200 idle1 61605 297724 0 0 3 0x14200 bored softnet 5160 168980 0 0 3 0x14200 bored systqmp 78841 397815 0 0 3 0x14200 bored systq 35813 345628 0 0 3 0x40014200 bored softclock 53147 193439 0 0 3 0x40014200 idle0 1 198656 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 50339 (syz-executor.0) thread 0xffff800020ed6288 (15871) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8268c1d0) #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 9511 6413K 6800K 78643K 10976 0 pcb 13 8K 8K 78643K 63 0 rtable 103 3K 3K 78643K 255 0 ifaddr 71 14K 14K 78643K 89 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1481 0 iov 0 0K 32K 78643K 40 0 mount 1 1K 1K 78643K 1 0 vnodes 1223 77K 77K 78643K 1345 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 505 0 sigio 0 0K 0K 78643K 1 0 proc 62 63K 83K 78643K 462 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 20 0 in_multi 49 2K 3K 78643K 88 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 222 0 pfkey data 0 0K 0K 78643K 199 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 124 71K 71K 78643K 2332 0 UVM aobj 9 2K 2K 78643K 9 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 11 0K 0K 78643K 17 0 temp 91 3037K 3101K 78643K 4323 0 kqueue 3 4K 6K 78643K 5 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 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 55 0 12 2 0 2 2 0 8 0 unpcb 120 129 0 119 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 236 0 236 1 1 0 1 0 8 0 tcpcb 544 93 0 89 1 0 1 1 0 8 0 inpcb 280 1484 0 1476 3 2 1 2 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 6 0 3 1 0 1 1 0 8 0 pkpcb 40 217 0 216 2 1 1 1 0 8 0 pffrag 232 8 0 8 2 1 1 1 0 482 1 pffrnode 88 8 0 8 2 1 1 1 0 8 1 pffrent 40 102 0 102 2 1 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 36 0 9 1 0 1 1 0 8 0 pfstkey 112 36 0 9 1 0 1 1 0 8 0 pfstate 328 36 0 9 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 256 231 0 42 13 0 13 13 0 8 1 art_table 32 232 0 42 2 0 2 2 0 8 0 art_node 16 54 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 8 2 1 1 1 0 8 1 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1979 0 571 90 1 89 89 0 8 0 ffsino 272 1979 0 571 94 0 94 94 0 8 0 nchpl 144 2918 0 1310 60 0 60 60 0 8 0 uvmvnodes 72 2109 0 0 39 0 39 39 0 8 0 vnodes 208 2109 0 0 111 0 111 111 0 8 0 namei 1024 7159 0 7159 1 0 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 0 1 0 1 1 0 8 0 scxspl 192 7569 0 7569 8 7 1 7 0 8 1 plimitpl 152 22 0 14 1 0 1 1 0 8 0 sigapl 424 724 0 692 4 0 4 4 0 8 0 futexpl 56 6639 0 6639 1 0 1 1 0 8 1 knotepl 112 64 0 45 1 0 1 1 0 8 0 kqueuepl 144 26 0 24 1 0 1 1 0 8 0 pipelkpl 48 105 0 95 1 0 1 1 0 8 0 pipepl 120 210 0 191 1 0 1 1 0 8 0 fdescpl 496 706 0 690 3 0 3 3 0 8 0 filepl 152 4080 0 3976 6 1 5 5 0 8 0 lockfpl 104 56 0 55 1 0 1 1 0 8 0 lockfspl 48 24 0 23 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 179 0 169 1 0 1 1 0 8 0 zombiepl 144 692 0 692 1 0 1 1 0 8 1 processpl 984 724 0 692 5 0 5 5 0 8 0 procpl 624 1554 0 1512 4 0 4 4 0 8 0 sosppl 128 1 0 0 1 0 1 1 0 8 0 sockpl 400 1861 0 1840 5 2 3 4 0 8 0 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 160 0 0 19 0 19 19 0 8 0 mtagpl 80 10 0 0 1 0 1 1 0 8 0 mbufpl 256 281 0 0 16 0 16 16 0 8 0 bufpl 280 3951 0 133 273 0 273 273 0 8 0 anonpl 16 74968 0 58519 81 14 67 76 0 124 0 amapchunkpl 152 3623 0 3484 19 13 6 19 0 158 0 amappl16 192 3200 0 2307 54 9 45 52 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 494 0 488 1 0 1 1 0 8 0 amappl13 168 68 0 66 1 0 1 1 0 8 0 amappl12 160 12 0 8 2 1 1 1 0 8 0 amappl11 152 61 0 45 1 0 1 1 0 8 0 amappl10 144 24 0 18 1 0 1 1 0 8 0 amappl9 136 390 0 388 1 0 1 1 0 8 0 amappl8 128 342 0 310 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 30 0 25 1 0 1 1 0 8 0 amappl5 104 609 0 592 1 0 1 1 0 8 0 amappl4 96 542 0 513 1 0 1 1 0 8 0 amappl3 88 616 0 609 1 0 1 1 0 8 0 amappl2 80 4920 0 4845 2 0 2 2 0 8 0 amappl1 72 25054 0 24606 24 14 10 18 0 8 0 amappl 80 1805 0 1757 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 8 0 0 1 0 1 1 0 8 0 uaddrrnd 24 712 0 690 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 712 0 690 1 0 1 1 0 8 0 vmmpekpl 168 9038 0 9006 2 0 2 2 0 8 0 vmmpepl 168 91558 0 89493 118 27 91 111 0 357 0 vmsppl 368 711 0 690 2 0 2 2 0 8 0 pdppl 4096 1432 0 1386 6 0 6 6 0 8 0 pvpl 32 225961 0 206345 184 24 160 182 0 265 1 pmappl 232 711 0 690 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 266 0 6 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(ffffffff824d2ff0) 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 __mp_lock(ffffffff8268bfc8) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8268bfc8) at __mp_lock+0x127 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0xc002bc5630, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff800020ec2e78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020ec2cc0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e44b1a8,ffff800020ec2e78,10,fffffd807f7bf960) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066cc1998,ffff800020ec2e78,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed6288,f0,ffff800020ec2e78,0,ffff800020ec2f60) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed6288,ffff800020ec2f10,ffff800020ec2f60) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ec2fe0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ec2fe0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd2a9e6e7f50, count: -8