óÓ(ëP‹yòóÓ(ëP‹yòuvm_fault(0xffffffff82637ae0, 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(0xffffffff82637ae0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800021f7d2a8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f7d0e0, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800021f7d2a8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f7d0f0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e45f008,ffff800021f7d2a8,10,fffffd807f7bf360) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067d3a020,ffff800021f7d2a8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed8c48,f0,ffff800021f7d2a8,0,ffff800021f7d390) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed8c48,ffff800021f7d340,ffff800021f7d390) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f7d410) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f7d410) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5edf0ff1e30, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f7d030 rbx 0xfffffd0000000000 rdx 0x625 rcx 0xffff800000a1c040 rax 0xffffffff8128fea3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xef5ea53e7b2165ff r11 0x28ce20aadb465126 r12 0 r13 0x3da r14 0xffff8000009d5660 r15 0xffff800021f7d2a8 rip 0xffffffff8128fea8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f7cfd0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=12239 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed9128,0xffff800020ed8778 process=0xffff800020ece028 user=0xffff800021f78000, vmspace=0xfffffd80663bc460 estcpu=30, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16989 104007 39393 0 2 0 syz-executor.1 48142 285124 7504 0 2 0 syz-executor.0 *48142 12239 7504 0 7 0x4000000 syz-executor.0 39393 466308 84748 0 7 0x2 syz-executor.1 43664 243862 0 0 3 0x14200 bored sosplice 7504 118648 84748 0 3 0x82 nanosleep syz-executor.0 84748 243483 60761 0 3 0x82 kqread syz-fuzzer 84748 395170 60761 0 3 0x4000082 nanosleep syz-fuzzer 84748 67809 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 251528 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 101861 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 345513 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 500560 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 71336 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 165986 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 25452 60761 0 3 0x4000082 thrsleep syz-fuzzer 84748 408462 60761 0 3 0x4000082 nanosleep syz-fuzzer 60761 406707 18549 0 3 0x10008a pause ksh 18549 192794 87140 0 3 0x92 select sshd 38724 162746 1 0 3 0x100083 ttyin getty 87140 44179 1 0 3 0x80 select sshd 97502 419552 91865 74 3 0x100092 bpf pflogd 91865 219076 1 0 3 0x80 netio pflogd 2600 383858 31416 73 3 0x100090 kqread syslogd 31416 336095 1 0 3 0x100082 netio syslogd 29532 521619 1 77 3 0x100090 poll dhclient 78613 203076 1 0 3 0x80 poll dhclient 13508 476911 0 0 3 0x14200 bored smr 62318 81195 0 0 2 0x14200 zerothread 95269 417103 0 0 3 0x14200 aiodoned aiodoned 73416 257330 0 0 3 0x14200 syncer update 14827 291719 0 0 3 0x14200 cleaner cleaner 31513 296926 0 0 3 0x14200 reaper reaper 56175 179800 0 0 3 0x14200 pgdaemon pagedaemon 20703 455600 0 0 3 0x14200 bored crynlk 59730 12532 0 0 3 0x14200 bored crypto 11080 169610 0 0 3 0x40014200 acpi0 acpi0 55167 523097 0 0 3 0x40014200 idle1 52007 89322 0 0 3 0x14200 bored softnet 86422 211031 0 0 3 0x14200 bored systqmp 97600 35268 0 0 3 0x14200 bored systq 19832 162203 0 0 3 0x40014200 bored softclock 40533 238455 0 0 3 0x40014200 idle0 1 446490 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 48142 (syz-executor.0) thread 0xffff800020ed8c48 (12239) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8267db98) #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 9544 6433K 7046K 78643K 12035 0 pcb 13 8K 9K 78643K 207 0 rtable 94 3K 4K 78643K 472 0 ifaddr 93 18K 18K 78643K 222 0 counters 43 33K 34K 78643K 85 0 ioctlops 0 0K 4K 78643K 1525 0 iov 0 0K 32K 78643K 115 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1673 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 168 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 756 0 sigio 0 0K 0K 78643K 19 0 proc 63 63K 95K 78643K 574 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 92 0 in_multi 73 3K 3K 78643K 192 0 ether_multi 1 0K 0K 78643K 38 0 mrt 0 0K 0K 78643K 13 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 287 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 152 137K 153K 78643K 3636 0 UVM aobj 24 4K 4K 78643K 24 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 151 0 NDP 15 0K 0K 78643K 43 0 temp 142 3050K 3115K 78643K 22189 0 kqueue 3 4K 20K 78643K 39 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 11 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 76 0 74 1 0 1 1 0 8 0 rtentry 112 75 0 38 2 0 2 2 0 8 0 unpcb 120 548 0 538 1 0 1 1 0 8 0 syncache 264 9 0 9 3 2 1 1 0 8 1 tcpqe 32 103 0 103 1 1 0 1 0 8 0 tcpcb 544 720 0 716 2 1 1 2 0 8 0 inpcb 280 2351 0 2343 4 2 2 3 0 8 1 rttmr 72 5 0 5 2 2 0 1 0 8 0 nd6 48 13 0 8 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 46 0 46 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 86 0 37 1 0 1 1 0 8 0 pfstkey 112 86 0 37 2 0 2 2 0 8 0 pfstate 328 86 0 37 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 256 337 0 144 14 1 13 13 0 8 0 art_table 32 338 0 144 2 0 2 2 0 8 0 art_node 16 74 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 44 0 34 3 2 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 165 0 155 1 0 1 1 0 8 0 shmpl 112 22 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2480 0 1077 89 0 89 89 0 8 0 ffsino 272 2480 0 1077 95 0 95 95 0 8 0 nchpl 144 3675 0 2077 60 0 60 60 0 8 0 uvmvnodes 72 2853 0 0 52 0 52 52 0 8 0 vnodes 208 2853 0 0 151 0 151 151 0 8 0 namei 1024 10386 0 10386 1 0 1 1 0 8 1 percpumem 16 53 0 21 1 0 1 1 0 8 0 vcpupl 1984 11 0 0 2 0 2 2 0 8 0 vmpool 560 17 0 6 1 0 1 1 0 8 0 scxspl 192 10608 0 10608 11 9 2 7 0 8 2 plimitpl 152 74 0 66 1 0 1 1 0 8 0 sigapl 424 970 0 937 4 0 4 4 0 8 0 futexpl 56 12822 0 12822 1 0 1 1 0 8 1 knotepl 112 147 0 128 2 1 1 2 0 8 0 kqueuepl 144 155 0 153 1 0 1 1 0 8 0 pipelkpl 48 205 0 195 1 0 1 1 0 8 0 pipepl 120 410 0 391 1 0 1 1 0 8 0 fdescpl 496 953 0 936 3 0 3 3 0 8 0 filepl 152 6915 0 6815 7 2 5 6 0 8 1 lockfpl 104 262 0 261 1 0 1 1 0 8 0 lockfspl 48 91 0 90 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 68 0 57 1 0 1 1 0 8 0 ucredpl 96 568 0 559 1 0 1 1 0 8 0 zombiepl 144 937 0 937 1 0 1 1 0 8 1 processpl 984 970 0 937 6 1 5 5 0 8 0 procpl 624 2752 0 2708 5 1 4 5 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 10 0 10 5 4 1 1 0 8 1 sockpl 400 2995 0 2976 7 3 4 6 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 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 167 0 0 20 0 20 20 0 8 0 mtagpl 80 51 0 0 2 0 2 2 0 8 0 mbufpl 256 350 0 0 19 0 19 19 0 8 0 bufpl 280 4811 0 140 334 0 334 334 0 8 0 anonpl 16 112920 0 97103 112 22 90 97 0 124 25 amapchunkpl 152 7056 0 6917 34 14 20 21 0 158 14 amappl16 192 4997 0 4139 78 27 51 68 0 8 8 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 24 0 20 1 0 1 1 0 8 0 amappl13 168 39 0 37 1 0 1 1 0 8 0 amappl12 160 430 0 423 2 1 1 1 0 8 0 amappl11 152 78 0 61 1 0 1 1 0 8 0 amappl10 144 318 0 310 1 0 1 1 0 8 0 amappl9 136 382 0 381 1 0 1 1 0 8 0 amappl8 128 383 0 345 2 0 2 2 0 8 0 amappl7 120 415 0 402 1 0 1 1 0 8 0 amappl6 112 29 0 24 2 1 1 1 0 8 0 amappl5 104 1257 0 1239 1 0 1 1 0 8 0 amappl4 96 515 0 484 1 0 1 1 0 8 0 amappl3 88 118 0 112 1 0 1 1 0 8 0 amappl2 80 6664 0 6591 2 0 2 2 0 8 0 amappl1 72 30716 0 30284 23 13 10 18 0 8 0 amappl 80 3041 0 2986 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 23 0 0 1 0 1 1 0 8 0 uaddrrnd 24 970 0 942 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 970 0 942 1 0 1 1 0 8 0 vmmpekpl 168 10976 0 10939 2 0 2 2 0 8 0 vmmpepl 168 124249 0 122137 144 36 108 118 0 357 15 vmsppl 368 969 0 942 3 0 3 3 0 8 0 pdppl 4096 1948 0 1895 7 0 7 7 0 8 0 pvpl 32 321758 0 302801 245 24 221 228 0 265 66 pmappl 232 969 0 942 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 276 0 9 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(ffffffff824e2ff0) 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(ffffffff8267d990) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8267d990) 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 __mp_lock(ffffffff8267d990) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8267d990) at __mp_lock+0x127 sys/kern/kern_lock.c:147 syscall(ffff800021f85d60) at syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800021f85d60) at syscall+0x400 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff9f70, count: -9 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff800021f7d2a8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f7d0f0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e45f008,ffff800021f7d2a8,10,fffffd807f7bf360) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067d3a020,ffff800021f7d2a8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed8c48,f0,ffff800021f7d2a8,0,ffff800021f7d390) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed8c48,ffff800021f7d340,ffff800021f7d390) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f7d410) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f7d410) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5edf0ff1e30, count: -8