uvm_fault(0xffffffff828b1c50, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff828b1c50, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023101168,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023100fa0, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800023101168,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023100fb0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ecfa5b8,ffff800023101168,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80668faef8,ffff800023101168,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e03288,f0,ffff800023101168,0,ffff800023101250) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e03288,ffff800023101200,ffff800023101250) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000231012d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231012d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3daf4d462e0, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023100ef0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000ae6380 rax 0xffffffff81f631d3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x8d9c3467e906bce0 r11 0x6464b5f2e9ec3aff r12 0 r13 0x3da r14 0xffff800000b32670 r15 0xffff800023101168 rip 0xffffffff81f631d8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023100e90 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=401462 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e034f8,0xffffffff828b25a0 process=0xffff8000230f5398 user=0xffff8000230fc000, vmspace=0xfffffd806e8fb178 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84535 50402 96875 0 7 0 syz-executor.0 *84535 401462 96875 0 7 0x4000000 syz-executor.0 41510 518130 0 0 3 0x14280 nfsidl nfsio 13484 73670 0 0 3 0x14280 nfsidl nfsio 63388 364747 0 0 3 0x14280 nfsidl nfsio 92969 405951 0 0 3 0x14280 nfsidl nfsio 81694 388748 0 0 3 0x14280 nfsidl nfsio 87262 296647 0 0 3 0x14280 nfsidl nfsio 47430 249060 0 0 3 0x14280 nfsidl nfsio 44273 194781 0 0 3 0x14280 nfsidl nfsio 77830 496557 0 0 3 0x14280 nfsidl nfsio 39858 377120 0 0 3 0x14280 nfsidl nfsio 19655 124812 0 0 3 0x14280 nfsidl nfsio 395 252667 0 0 3 0x14280 nfsidl nfsio 27772 429000 0 0 3 0x14280 nfsidl nfsio 71512 518871 0 0 3 0x14280 nfsidl nfsio 42595 47065 0 0 3 0x14280 nfsidl nfsio 11361 259684 0 0 3 0x14280 nfsidl nfsio 61360 334706 0 0 3 0x14280 nfsidl nfsio 74910 176614 0 0 3 0x14280 nfsidl nfsio 27826 171365 0 0 3 0x14280 nfsidl nfsio 22819 109848 0 0 3 0x14280 nfsidl nfsio 90874 13267 0 0 3 0x14200 acct acct 78739 95173 1 0 3 0x100083 ttyin getty 96875 220612 46808 0 2 0x482 syz-executor.0 79830 17319 0 0 3 0x14200 bored sosplice 70543 487918 46808 0 2 0x2 syz-executor.1 46808 144997 73851 0 3 0x82 thrsleep syz-fuzzer 46808 231654 73851 0 3 0x4000082 nanosleep syz-fuzzer 46808 517900 73851 0 3 0x4000082 thrsleep syz-fuzzer 46808 329173 73851 0 3 0x4000082 kqread syz-fuzzer 46808 214116 73851 0 3 0x4000082 thrsleep syz-fuzzer 46808 183902 73851 0 3 0x4000082 thrsleep syz-fuzzer 46808 290310 73851 0 2 0x4000482 syz-fuzzer 46808 54806 73851 0 3 0x4000082 thrsleep syz-fuzzer 46808 24196 73851 0 3 0x4000082 thrsleep syz-fuzzer 46808 111585 73851 0 3 0x4000082 thrsleep syz-fuzzer 73851 330166 57848 0 3 0x10008a pause ksh 57848 130065 80052 0 3 0x92 select sshd 80052 45555 1 0 3 0x80 select sshd 56902 193204 77455 74 3 0x100092 bpf pflogd 77455 256990 1 0 3 0x80 netio pflogd 9752 465589 29950 73 3 0x100090 kqread syslogd 29950 212767 1 0 3 0x100082 netio syslogd 54266 75523 1 77 3 0x100090 poll dhclient 98132 221650 1 0 3 0x80 poll dhclient 92469 35331 0 0 3 0x14200 bored smr 86401 502835 0 0 3 0x14200 pgzero zerothread 77995 164620 0 0 3 0x14200 aiodoned aiodoned 87525 211873 0 0 3 0x14200 syncer update 67986 506792 0 0 3 0x14200 cleaner cleaner 92296 222574 0 0 3 0x14200 reaper reaper 22354 386414 0 0 3 0x14200 pgdaemon pagedaemon 64091 157777 0 0 3 0x14200 bored crynlk 30065 32560 0 0 3 0x14200 bored crypto 68808 206708 0 0 3 0x40014200 acpi0 acpi0 83295 236988 0 0 3 0x40014200 idle1 46757 500562 0 0 3 0x14200 bored softnet 76152 189906 0 0 3 0x14200 bored systqmp 90960 459711 0 0 3 0x14200 bored systq 90640 514682 0 0 2 0x40014200 softclock 58972 356403 0 0 3 0x40014200 idle0 1 233812 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 84535 (syz-executor.0) thread 0xffff800020e03288 (401462) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8290c2b8) #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 Process 70543 (syz-executor.1) thread 0xffff800020e04d58 (487918) exclusive rrwlock inode r = 0 (0xfffffd80687cea30) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80687ce4e0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9557 6447K 7143K 78643K 12431 0 pcb 13 8K 8K 78643K 229 0 rtable 112 9K 13K 78643K 793 0 ifaddr 114 22K 23K 78643K 336 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 89 0 ioctlops 0 0K 4K 78643K 1640 0 iov 0 0K 16K 78643K 178 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1809 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 26 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 165 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1325 0 proc 63 63K 95K 78643K 586 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 106 0 in_multi 92 4K 4K 78643K 364 0 ether_multi 1 0K 0K 78643K 37 0 mrt 0 0K 0K 78643K 12 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 316 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 145 72K 74K 78643K 5195 0 UVM aobj 71 7K 7K 78643K 76 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 232 0 NDP 17 0K 0K 78643K 74 0 temp 156 3877K 3942K 78643K 35024 0 kqueue 3 4K 22K 78643K 70 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 11 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 65 0 63 1 0 1 1 0 8 0 rtentry 112 142 0 110 2 0 2 2 0 8 0 unpcb 120 821 0 809 1 0 1 1 0 8 0 syncache 264 14 0 14 6 5 1 1 0 8 1 tcpqe 32 297 0 297 3 2 1 1 0 8 1 tcpcb 544 463 0 458 2 1 1 2 0 8 0 inpcb 296 1436 0 1428 6 4 2 2 0 8 1 rttmr 72 5 0 5 2 1 1 1 0 8 1 ip6q 72 2 0 2 1 0 1 1 0 8 1 ip6af 40 6 0 6 1 0 1 1 0 8 1 nd6 48 52 0 49 1 0 1 1 0 8 0 pkpcb 40 12 0 12 4 4 0 1 0 8 0 ppxss 1128 3 0 3 3 3 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 2 0 1 2 1 1 1 0 482 0 pffrnode 88 2 0 1 2 1 1 1 0 8 0 pffrent 40 6 0 5 3 2 1 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 pfrktable 1344 86 0 74 4 2 2 2 0 8 1 pftag 88 8 0 4 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 0 1 1 0 8 1 pfstitem 24 21 0 15 1 0 1 1 0 8 0 pfstkey 112 23 0 17 1 0 1 1 0 8 0 pfstate 328 22 0 16 2 0 2 2 0 8 0 pfrule 1360 59 0 37 3 1 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 766 0 584 21 7 14 14 0 8 2 art_table 32 768 0 584 2 0 2 2 0 8 0 art_node 16 141 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 6 1 0 1 1 0 8 0 semapl 112 162 0 152 1 0 1 1 0 8 0 shmpl 112 73 0 5 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3150 0 1750 89 1 88 89 0 8 0 ffsino 272 3150 0 1750 95 1 94 94 0 8 0 nchpl 144 6010 0 4408 60 0 60 60 0 8 0 uvmvnodes 72 3608 0 0 66 0 66 66 0 8 0 vnodes 208 3608 0 0 190 0 190 190 0 8 0 namei 1024 16531 0 16531 4 3 1 1 0 8 1 percpumem 16 55 0 23 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 11 0 7 1 0 1 1 0 8 0 pfiaddrpl 120 29 0 19 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 192 15868 0 15868 13 12 1 7 0 8 1 plimitpl 152 90 0 82 1 0 1 1 0 8 0 sigapl 424 1560 0 1507 8 1 7 7 0 8 1 futexpl 56 20252 0 20252 3 2 1 1 0 8 1 knotepl 112 205 0 186 2 1 1 2 0 8 0 kqueuepl 144 201 0 193 1 0 1 1 0 8 0 pipepl 304 247 0 237 5 3 2 2 0 8 1 fdescpl 496 1523 0 1507 3 0 3 3 0 8 0 filepl 152 10308 0 10203 7 2 5 6 0 8 0 lockfpl 104 276 0 275 1 0 1 1 0 8 0 lockfspl 48 96 0 95 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 136 0 125 1 0 1 1 0 8 0 ucredpl 96 937 0 928 1 0 1 1 0 8 0 zombiepl 144 1507 0 1507 2 1 1 1 0 8 1 processpl 992 1560 0 1507 8 1 7 7 0 8 0 procpl 624 4333 0 4270 7 1 6 6 0 8 1 sosppl 128 12 0 12 4 3 1 1 0 8 1 sockpl 400 2335 0 2313 11 7 4 5 0 8 1 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 168 0 0 20 0 20 20 0 8 0 mtagpl 96 87 0 0 2 0 2 2 0 8 0 mbufpl 256 355 0 0 18 0 18 18 0 8 0 bufpl 280 6338 0 145 443 0 443 443 0 8 0 anonpl 16 146334 0 129635 105 33 72 85 0 124 1 amapchunkpl 152 9734 0 9576 38 31 7 21 0 158 0 amappl16 192 7290 0 6365 82 35 47 58 0 8 0 amappl15 184 9 0 8 1 0 1 1 0 8 0 amappl14 176 457 0 450 1 0 1 1 0 8 0 amappl13 168 39 0 35 1 0 1 1 0 8 0 amappl12 160 12 0 10 2 1 1 1 0 8 0 amappl11 152 57 0 42 1 0 1 1 0 8 0 amappl10 144 19 0 13 1 0 1 1 0 8 0 amappl9 136 1239 0 1236 1 0 1 1 0 8 0 amappl8 128 601 0 560 2 0 2 2 0 8 0 amappl7 120 125 0 113 1 0 1 1 0 8 0 amappl6 112 29 0 22 1 0 1 1 0 8 0 amappl5 104 1438 0 1421 1 0 1 1 0 8 0 amappl4 96 523 0 490 1 0 1 1 0 8 0 amappl3 88 586 0 579 1 0 1 1 0 8 0 amappl2 80 11285 0 11215 2 0 2 2 0 8 0 amappl1 72 42133 0 41697 23 13 10 18 0 8 0 amappl 80 4600 0 4549 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 75 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1534 0 1514 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1534 0 1514 1 0 1 1 0 8 0 vmmpekpl 168 14988 0 14949 2 0 2 2 0 8 0 vmmpepl 168 189887 0 187788 160 62 98 127 0 357 2 vmsppl 368 1533 0 1514 2 0 2 2 0 8 0 pdppl 4096 3075 0 3032 8 2 6 6 0 8 0 pvpl 32 425234 0 405253 236 54 182 200 0 265 13 pmappl 232 1533 0 1514 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 294 0 26 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d00,ffff800023101168,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023100fb0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ecfa5b8,ffff800023101168,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80668faef8,ffff800023101168,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e03288,f0,ffff800023101168,0,ffff800023101250) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e03288,ffff800023101200,ffff800023101250) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000231012d0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000231012d0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3daf4d462e0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d70ff0) 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: 0x7f7ffffbb460, count: -3