uvm_fault(0xffffffff82893250, 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(0xffffffff82893250, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff80002292d848,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff80002292d680, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff80002292d848,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff80002292d690) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2dc1a8,ffff80002292d848,10,fffffd807f7bf660) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80686d46a0,ffff80002292d848,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e324f8,f0,ffff80002292d848,0,ffff80002292d930) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e324f8,ffff80002292d8e0,ffff80002292d930) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80002292d9b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002292d9b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe77e1a3afb0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff80002292d5d0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000ae8200 rax 0xffffffff8174aaf3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x8f69d53175fec4d0 r11 0xdf1b390bb55a20d0 r12 0 r13 0x3da r14 0xffff800000af3660 r15 0xffff80002292d848 rip 0xffffffff8174aaf8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002292d570 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=331612 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e32018,0xffffffff828fc698 process=0xffff8000229a4030 user=0xffff800022928000, vmspace=0xfffffd80685948b8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59734 443354 37573 0 2 0 syz-executor.0 *59734 331612 37573 0 7 0x4000000 syz-executor.0 969 158261 0 0 3 0x14200 bored sosplice 53246 430609 0 0 3 0x14280 nfsidl nfsio 65546 225162 0 0 3 0x14280 nfsidl nfsio 12595 141291 0 0 3 0x14280 nfsidl nfsio 91566 273966 0 0 3 0x14280 nfsidl nfsio 27454 369493 0 0 3 0x14280 nfsidl nfsio 95557 256270 0 0 3 0x14280 nfsidl nfsio 22733 504099 0 0 3 0x14280 nfsidl nfsio 4595 382644 0 0 3 0x14280 nfsidl nfsio 8931 237356 0 0 3 0x14280 nfsidl nfsio 5833 372882 0 0 3 0x14280 nfsidl nfsio 58033 1167 0 0 3 0x14280 nfsidl nfsio 15163 124028 0 0 3 0x14280 nfsidl nfsio 40796 224927 0 0 3 0x14280 nfsidl nfsio 46915 223051 0 0 3 0x14280 nfsidl nfsio 92759 314119 0 0 3 0x14280 nfsidl nfsio 64359 70833 0 0 3 0x14280 nfsidl nfsio 70209 399412 0 0 3 0x14280 nfsidl nfsio 70052 374186 0 0 3 0x14280 nfsidl nfsio 61295 319208 0 0 3 0x14280 nfsidl nfsio 71543 480335 0 0 3 0x14280 nfsidl nfsio 74103 41769 62675 0 3 0x82 piperd syz-executor.1 37573 503418 62675 0 3 0x82 nanosleep syz-executor.0 62675 368733 82000 0 3 0x82 thrsleep syz-fuzzer 62675 253317 82000 0 3 0x4000082 nanosleep syz-fuzzer 62675 304344 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 165089 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 135879 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 130858 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 164365 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 522254 82000 0 3 0x4000082 thrsleep syz-fuzzer 62675 519913 82000 0 7 0x4000002 syz-fuzzer 62675 350028 82000 0 3 0x4000082 kqread syz-fuzzer 82000 55347 29306 0 3 0x10008a pause ksh 29306 80735 93324 0 3 0x92 select sshd 71441 457545 1 0 3 0x100083 ttyin getty 93324 513983 1 0 3 0x80 select sshd 3414 243968 99952 74 3 0x100092 bpf pflogd 99952 177792 1 0 3 0x80 netio pflogd 26773 360171 19144 73 3 0x100090 kqread syslogd 19144 387811 1 0 3 0x100082 netio syslogd 13563 353873 1 77 3 0x100090 poll dhclient 81007 467852 1 0 3 0x80 poll dhclient 28588 457857 0 0 3 0x14200 bored smr 57315 175298 0 0 2 0x14200 zerothread 13300 473855 0 0 3 0x14200 aiodoned aiodoned 47821 407837 0 0 3 0x14200 syncer update 71790 293783 0 0 3 0x14200 cleaner cleaner 91732 189227 0 0 3 0x14200 reaper reaper 99018 191554 0 0 3 0x14200 pgdaemon pagedaemon 98654 433497 0 0 3 0x14200 bored crynlk 18063 406219 0 0 3 0x14200 bored crypto 22600 111295 0 0 3 0x40014200 acpi0 acpi0 85386 149611 0 0 3 0x40014200 idle1 5929 415006 0 0 3 0x14200 bored softnet 73175 485077 0 0 3 0x14200 bored systqmp 47777 299251 0 0 3 0x14200 bored systq 44657 457912 0 0 3 0x40014200 bored softclock 9252 106063 0 0 3 0x40014200 idle0 1 365334 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 59734 (syz-executor.0) thread 0xffff800020e324f8 (331612) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82893730) #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 9517 6426K 6814K 78643K 11363 0 pcb 13 8K 8K 78643K 81 0 rtable 84 4K 5K 78643K 437 0 ifaddr 70 14K 15K 78643K 242 0 counters 41 33K 34K 78643K 105 0 ioctlops 0 0K 4K 78643K 1543 0 iov 0 0K 12K 78643K 40 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 77K 78643K 1475 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 53 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 621 0 sigio 0 0K 0K 78643K 3 0 proc 62 63K 95K 78643K 482 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 41 0 in_multi 43 2K 2K 78643K 90 0 ether_multi 1 0K 0K 78643K 12 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 229 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 192 382K 382K 78643K 3025 0 UVM aobj 18 2K 2K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 61 0 NDP 11 0K 0K 78643K 48 0 temp 103 3850K 3914K 78643K 6004 0 kqueue 3 4K 14K 78643K 107 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 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 54 0 24 2 0 2 2 0 8 1 unpcb 120 561 0 551 1 0 1 1 0 8 0 syncache 264 7 0 7 3 3 0 1 0 8 0 tcpqe 32 52 0 52 1 1 0 1 0 8 0 tcpcb 544 1122 0 1118 2 1 1 2 0 8 0 inpcb 280 1423 0 1416 3 1 2 2 0 8 1 nd6 48 9 0 8 1 0 1 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 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 90 0 90 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 pfrktable 1344 4 0 2 1 0 1 1 0 8 0 pfstitem 24 11 0 5 1 0 1 1 0 8 0 pfstkey 112 11 0 5 1 0 1 1 0 8 0 pfstate 328 11 0 5 1 0 1 1 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 233 0 95 13 3 10 13 0 8 1 art_table 32 234 0 95 2 0 2 2 0 8 0 art_node 16 53 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 13 1 0 1 1 0 8 0 semapl 112 51 0 41 1 0 1 1 0 8 0 shmpl 112 18 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2319 0 902 90 0 90 90 0 8 0 ffsino 272 2319 0 902 96 0 96 96 0 8 0 nchpl 144 3433 0 1823 60 0 60 60 0 8 0 uvmvnodes 72 2541 0 0 47 0 47 47 0 8 0 vnodes 208 2541 0 0 134 0 134 134 0 8 0 namei 1024 10223 0 10223 1 0 1 1 0 8 1 percpumem 16 63 0 32 1 0 1 1 0 8 0 vcpupl 1984 24 0 0 3 0 3 3 0 8 0 vmpool 560 27 0 3 2 0 2 2 0 8 0 pfiaddrpl 120 3 0 2 1 0 1 1 0 8 0 scxspl 192 9791 0 9791 10 9 1 7 0 8 1 plimitpl 152 36 0 28 1 0 1 1 0 8 0 sigapl 424 857 0 805 6 0 6 6 0 8 0 futexpl 56 9717 0 9717 1 0 1 1 0 8 1 knotepl 112 205 0 186 1 0 1 1 0 8 0 kqueuepl 144 298 0 270 2 0 2 2 0 8 0 pipelkpl 48 154 0 144 1 0 1 1 0 8 0 pipepl 120 308 0 289 1 0 1 1 0 8 0 fdescpl 496 821 0 805 3 0 3 3 0 8 0 filepl 152 6571 0 6471 5 0 5 5 0 8 1 lockfpl 104 87 0 86 1 0 1 1 0 8 0 lockfspl 48 31 0 30 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 66 0 55 1 0 1 1 0 8 0 ucredpl 96 325 0 316 1 0 1 1 0 8 0 zombiepl 144 805 0 805 1 0 1 1 0 8 1 processpl 984 857 0 805 7 0 7 7 0 8 0 procpl 624 2194 0 2132 6 0 6 6 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sockpl 400 2012 0 1993 5 1 4 4 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 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 162 0 0 20 0 20 20 0 8 0 mtagpl 80 19 0 0 1 0 1 1 0 8 0 mbufpl 256 258 0 0 14 0 14 14 0 8 0 bufpl 280 4331 0 140 300 0 300 300 0 8 0 anonpl 16 79808 0 64488 79 9 70 78 0 124 7 amapchunkpl 152 4379 0 4233 8 1 7 8 0 158 0 amappl16 192 4033 0 3187 55 12 43 55 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 28 0 21 1 0 1 1 0 8 0 amappl13 168 33 0 29 1 0 1 1 0 8 0 amappl12 160 6 0 5 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 325 0 317 1 0 1 1 0 8 0 amappl9 136 387 0 386 1 0 1 1 0 8 0 amappl8 128 352 0 323 1 0 1 1 0 8 0 amappl7 120 433 0 418 1 0 1 1 0 8 0 amappl6 112 23 0 21 1 0 1 1 0 8 0 amappl5 104 720 0 703 1 0 1 1 0 8 0 amappl4 96 486 0 455 1 0 1 1 0 8 0 amappl3 88 134 0 110 1 0 1 1 0 8 0 amappl2 80 5628 0 5561 2 0 2 2 0 8 0 amappl1 72 27467 0 27013 23 13 10 18 0 8 0 amappl 80 2453 0 2384 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 19 0 2 1 0 1 1 0 8 0 uaddrrnd 24 848 0 808 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 848 0 808 1 0 1 1 0 8 0 vmmpekpl 168 9709 0 9668 3 0 3 3 0 8 0 vmmpepl 168 104827 0 102732 121 22 99 107 0 357 3 vmsppl 368 847 0 808 4 0 4 4 0 8 0 pdppl 4096 1703 0 1640 11 2 9 9 0 8 1 pvpl 32 254617 0 236009 190 10 180 188 0 265 28 pmappl 232 847 0 808 3 0 3 3 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 275 0 10 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(ffffffff82784ff0) 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(ffffffff82893528) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82893528) 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: 0xc0004dceb8, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff80002292d848,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff80002292d690) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2dc1a8,ffff80002292d848,10,fffffd807f7bf660) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80686d46a0,ffff80002292d848,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e324f8,f0,ffff80002292d848,0,ffff80002292d930) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e324f8,ffff80002292d8e0,ffff80002292d930) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff80002292d9b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002292d9b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe77e1a3afb0, count: -8