uvm_fault(0xffffffff8288d220, 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(0xffffffff8288d220, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800020ee3c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800020ee3ac0, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800020ee3c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020ee3ad0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ecd6008,ffff800020ee3c88,10,fffffd807f7bfae0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806856aef8,ffff800020ee3c88,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed0030,f0,ffff800020ee3c88,0,ffff800020ee3d70) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed0030,ffff800020ee3d20,ffff800020ee3d70) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ee3df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ee3df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf198d66b050, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800020ee3a10 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000aa5f00 rax 0xffffffff81582663 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x94da7a3707cd3102 r11 0x4332f2259652e14d r12 0 r13 0x3da r14 0xffff800000b0e660 r15 0xffff800020ee3c88 rip 0xffffffff81582668 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800020ee39b0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=241943 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed1b00,0xffffffff8289bb10 process=0xffff8000252fa038 user=0xffff800020ede000, vmspace=0xfffffd806466f468 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44841 398299 3373 0 2 0 syz-executor.0 *44841 241943 3373 0 7 0x4000000 syz-executor.0 25257 394544 15558 0 7 0 syz-executor.1 25257 92937 15558 0 3 0x4000080 netcon2 syz-executor.1 25257 296826 15558 0 3 0x4000080 fsleep syz-executor.1 15558 163760 46729 0 3 0x82 nanosleep syz-executor.1 14587 62231 0 0 3 0x14280 nfsidl nfsio 36670 75940 0 0 3 0x14280 nfsidl nfsio 36417 304408 0 0 3 0x14280 nfsidl nfsio 82454 438967 0 0 3 0x14280 nfsidl nfsio 73461 228353 0 0 3 0x14280 nfsidl nfsio 722 108596 0 0 3 0x14280 nfsidl nfsio 16377 121140 0 0 3 0x14280 nfsidl nfsio 3447 63907 0 0 3 0x14280 nfsidl nfsio 65889 96579 0 0 3 0x14280 nfsidl nfsio 87801 277698 0 0 3 0x14280 nfsidl nfsio 99799 503806 0 0 3 0x14280 nfsidl nfsio 68431 87746 0 0 3 0x14280 nfsidl nfsio 78831 522591 0 0 3 0x14280 nfsidl nfsio 68661 369768 0 0 3 0x14280 nfsidl nfsio 1162 434419 0 0 3 0x14280 nfsidl nfsio 19363 518235 0 0 3 0x14280 nfsidl nfsio 784 281992 0 0 3 0x14280 nfsidl nfsio 25897 214011 0 0 3 0x14280 nfsidl nfsio 96231 447957 0 0 3 0x14280 nfsidl nfsio 88202 452892 0 0 3 0x14280 nfsidl nfsio 13611 81417 1 0 3 0x100083 ttyin getty 3373 140415 46729 0 3 0x82 nanosleep syz-executor.0 57931 373635 0 0 3 0x14200 bored sosplice 46729 417085 6149 0 3 0x82 kqread syz-fuzzer 46729 104245 6149 0 3 0x4000082 nanosleep syz-fuzzer 46729 496362 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 38227 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 134148 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 296005 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 267696 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 316955 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 423749 6149 0 3 0x4000082 thrsleep syz-fuzzer 46729 379750 6149 0 3 0x4000082 thrsleep syz-fuzzer 6149 242724 14853 0 3 0x10008a pause ksh 14853 56738 27324 0 3 0x92 select sshd 27324 143570 1 0 3 0x80 select sshd 13528 482212 31910 74 3 0x100092 bpf pflogd 31910 188113 1 0 3 0x80 netio pflogd 42048 113179 34231 73 3 0x100090 kqread syslogd 34231 249941 1 0 3 0x100082 netio syslogd 27446 387365 1 77 3 0x100090 poll dhclient 76986 207582 1 0 3 0x80 poll dhclient 77562 281016 0 0 3 0x14200 bored smr 42588 165319 0 0 2 0x14200 zerothread 14719 149024 0 0 3 0x14200 aiodoned aiodoned 6961 235469 0 0 3 0x14200 syncer update 28215 112986 0 0 3 0x14200 cleaner cleaner 82413 291756 0 0 3 0x14200 reaper reaper 34032 61832 0 0 3 0x14200 pgdaemon pagedaemon 574 307869 0 0 3 0x14200 bored crynlk 27025 324020 0 0 3 0x14200 bored crypto 47425 185914 0 0 3 0x40014200 acpi0 acpi0 95938 137625 0 0 3 0x40014200 idle1 171 93569 0 0 3 0x14200 bored softnet 10835 226102 0 0 3 0x14200 bored systqmp 42932 279719 0 0 3 0x14200 bored systq 3366 505423 0 0 3 0x40014200 bored softclock 48390 364992 0 0 3 0x40014200 idle0 1 318449 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 44841 (syz-executor.0) thread 0xffff800020ed0030 (241943) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8289dd48) #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 9543 6426K 6942K 78643K 12598 0 pcb 13 8K 8K 78643K 1504 0 rtable 130 18K 21K 78643K 952 0 ifaddr 109 22K 23K 78643K 366 0 sysctl 2 0K 0K 78643K 175 0 counters 43 33K 34K 78643K 97 0 ioctlops 0 0K 4K 78643K 1742 0 iov 0 0K 16K 78643K 215 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1903 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 25 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 286 0 dirhash 6 1K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 1529 0 sigio 0 0K 0K 78643K 5 0 proc 61 63K 83K 78643K 700 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 86 0 in_multi 129 6K 6K 78643K 346 0 ether_multi 1 0K 0K 78643K 32 0 mrt 1 0K 0K 78643K 10 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 377 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 167 219K 235K 78643K 6150 0 UVM aobj 56 7K 7K 78643K 57 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 238 0 NDP 15 0K 0K 78643K 69 0 temp 150 3867K 3943K 78643K 39815 0 kqueue 3 4K 12K 78643K 74 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 20 0 11 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 83 0 81 1 0 1 1 0 8 0 rtentry 112 154 0 114 2 0 2 2 0 8 0 unpcb 120 664 0 653 1 0 1 1 0 8 0 syncache 264 17 0 17 5 5 0 1 0 8 0 tcpqe 32 504 0 504 4 4 0 1 0 8 0 tcpcb 544 588 0 583 4 3 1 2 0 8 0 inpcb 296 2856 0 2848 5 3 2 3 0 8 1 rttmr 72 3 0 3 2 2 0 1 0 8 0 nd6 48 46 0 43 1 0 1 1 0 8 0 ppxss 1128 9 0 9 5 5 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 6 0 6 3 3 0 1 0 482 0 pffrnode 88 6 0 6 3 3 0 1 0 8 0 pffrent 40 141 0 141 3 3 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 pfrke_plain 160 19 0 12 1 0 1 1 0 8 0 pfrktable 1344 129 0 120 3 2 1 2 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 53 0 46 1 0 1 1 0 8 0 pfstkey 112 53 0 46 1 0 1 1 0 8 0 pfstate 328 51 0 45 3 0 3 3 0 8 0 pfrule 1360 68 0 44 5 2 3 3 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 750 0 553 21 7 14 19 0 8 0 art_table 32 752 0 553 3 0 3 3 0 8 0 art_node 16 151 0 114 1 0 1 1 0 8 0 sysvmsgpl 40 41 0 27 1 0 1 1 0 8 0 semapl 112 284 0 274 1 0 1 1 0 8 0 shmpl 112 55 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 13 3 1 2 3 0 8 0 dino2pl 256 3385 0 1980 89 0 89 89 0 8 0 ffsino 272 3385 0 1980 96 1 95 95 0 8 0 nchpl 144 5529 0 3936 60 0 60 60 0 8 0 rtmask 32 26 0 21 1 0 1 1 0 8 0 uvmvnodes 72 3928 0 0 72 0 72 72 0 8 0 vnodes 208 3928 0 0 207 0 207 207 0 8 0 namei 1024 16715 0 16715 6 5 1 1 0 8 1 percpumem 16 59 0 27 1 0 1 1 0 8 0 vcpupl 1984 22 0 0 3 0 3 3 0 8 0 vmpool 560 32 0 10 2 0 2 2 0 8 0 pfiaddrpl 120 37 0 30 3 2 1 1 0 8 0 scxspl 192 17842 0 17842 22 19 3 7 0 8 3 plimitpl 152 103 0 95 1 0 1 1 0 8 0 sigapl 424 1757 0 1704 6 0 6 6 0 8 0 futexpl 56 22750 0 22749 5 4 1 1 0 8 0 knotepl 112 178 0 159 1 0 1 1 0 8 0 kqueuepl 144 182 0 178 1 0 1 1 0 8 0 pipelkpl 48 259 0 249 1 0 1 1 0 8 0 pipepl 120 518 0 499 1 0 1 1 0 8 0 fdescpl 496 1721 0 1704 3 0 3 3 0 8 0 filepl 152 10840 0 10738 9 4 5 6 0 8 0 lockfpl 104 339 0 338 1 0 1 1 0 8 0 lockfspl 48 123 0 122 1 0 1 1 0 8 0 sessionpl 112 22 0 11 1 0 1 1 0 8 0 pgrppl 48 32 0 21 1 0 1 1 0 8 0 ucredpl 96 1114 0 1105 1 0 1 1 0 8 0 zombiepl 144 1704 0 1704 3 2 1 1 0 8 1 processpl 984 1757 0 1704 8 1 7 7 0 8 0 procpl 624 5146 0 5081 7 1 6 6 0 8 0 sosppl 128 22 0 22 5 4 1 1 0 8 1 sockpl 400 3635 0 3614 12 9 3 5 0 8 0 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 1 23 24 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 419 0 0 23 0 23 23 0 8 0 bufpl 280 7739 0 1504 446 0 446 446 0 8 0 anonpl 16 179247 0 161689 112 39 73 86 0 124 1 amapchunkpl 152 11673 0 11474 41 19 22 22 0 158 13 amappl16 192 8064 0 7130 84 35 49 58 0 8 2 amappl15 184 487 0 487 2 2 0 1 0 8 0 amappl14 176 22 0 19 1 0 1 1 0 8 0 amappl13 168 293 0 287 1 0 1 1 0 8 0 amappl12 160 13 0 10 1 0 1 1 0 8 0 amappl11 152 558 0 542 1 0 1 1 0 8 0 amappl10 144 766 0 756 1 0 1 1 0 8 0 amappl9 136 376 0 375 1 0 1 1 0 8 0 amappl8 128 457 0 416 2 0 2 2 0 8 0 amappl7 120 874 0 859 1 0 1 1 0 8 0 amappl6 112 432 0 425 1 0 1 1 0 8 0 amappl5 104 1225 0 1207 1 0 1 1 0 8 0 amappl4 96 1178 0 1144 1 0 1 1 0 8 0 amappl3 88 176 0 171 1 0 1 1 0 8 0 amappl2 80 12755 0 12669 2 0 2 2 0 8 0 amappl1 72 46923 0 46456 23 13 10 18 0 8 0 amappl 80 5480 0 5415 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 56 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1753 0 1714 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1753 0 1714 1 0 1 1 0 8 0 vmmpekpl 168 15912 0 15861 4 1 3 3 0 8 0 vmmpepl 168 216853 0 214560 185 84 101 129 0 357 1 vmsppl 368 1752 0 1714 4 0 4 4 0 8 0 pdppl 4096 3513 0 3450 10 1 9 9 0 8 1 pvpl 32 500629 0 480410 250 80 170 198 0 265 3 pmappl 232 1752 0 1714 4 1 3 3 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 316 0 33 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8273dff0) 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(ffffffff8289db40) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289db40) 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: 0x7f7ffffcc9e0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff800020ee3c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800020ee3ad0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ecd6008,ffff800020ee3c88,10,fffffd807f7bfae0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806856aef8,ffff800020ee3c88,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed0030,f0,ffff800020ee3c88,0,ffff800020ee3d70) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed0030,ffff800020ee3d20,ffff800020ee3d70) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800020ee3df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ee3df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf198d66b050, count: -8