uvm_fault(0xffffffff827b1fb8, 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(0xffffffff827b1fb8, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800021f91bd8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f91a10, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800021f91bd8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f91a20) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3f90d8,ffff800021f91bd8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bfaa38,ffff800021f91bd8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e95750,f0,ffff800021f91bd8,0,ffff800021f91cc0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e95750,ffff800021f91c70,ffff800021f91cc0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f91d40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f91d40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0ea2703810, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f91960 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000aeb100 rax 0xffffffff816ca853 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xbb3c7fbdf76fc92f r11 0xfc0dfa2bf8241717 r12 0 r13 0x3da r14 0xffff800000ac6670 r15 0xffff800021f91bd8 rip 0xffffffff816ca858 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f91900 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=297155 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e0a878,0xffffffff82912c38 process=0xffff800021f40fb8 user=0xffff800021f8c000, vmspace=0xfffffd806e8e9458 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72325 215611 18354 0 2 0 syz-executor.0 *72325 297155 18354 0 7 0x4000000 syz-executor.0 63866 35451 71520 0 3 0x82 nanosleep syz-executor.1 78675 35516 0 0 3 0x14200 bored sosplice 13060 347462 0 0 3 0x14280 nfsidl nfsio 41695 417723 0 0 3 0x14280 nfsidl nfsio 45406 505751 0 0 3 0x14280 nfsidl nfsio 43598 257988 0 0 3 0x14280 nfsidl nfsio 21992 476063 0 0 3 0x14280 nfsidl nfsio 76027 14422 0 0 3 0x14280 nfsidl nfsio 22438 175123 0 0 3 0x14280 nfsidl nfsio 17621 252014 0 0 3 0x14280 nfsidl nfsio 89673 254618 0 0 3 0x14280 nfsidl nfsio 38247 504667 0 0 3 0x14280 nfsidl nfsio 23833 435197 0 0 3 0x14280 nfsidl nfsio 11518 71689 0 0 3 0x14280 nfsidl nfsio 31874 461268 0 0 3 0x14280 nfsidl nfsio 28907 453606 0 0 3 0x14280 nfsidl nfsio 43493 387949 0 0 3 0x14280 nfsidl nfsio 9534 26065 0 0 3 0x14280 nfsidl nfsio 25739 241424 0 0 3 0x14280 nfsidl nfsio 69111 93926 0 0 3 0x14280 nfsidl nfsio 88216 396294 0 0 3 0x14280 nfsidl nfsio 99176 10653 0 0 3 0x14280 nfsidl nfsio 18354 212088 71520 0 2 0x482 syz-executor.0 71520 37929 13327 0 3 0x82 thrsleep syz-fuzzer 71520 341892 13327 0 2 0x4000482 syz-fuzzer 71520 115215 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 378212 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 185886 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 445536 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 467282 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 76873 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 507672 13327 0 3 0x4000082 kqread syz-fuzzer 71520 138217 13327 0 3 0x4000082 thrsleep syz-fuzzer 71520 479355 13327 0 3 0x4000082 thrsleep syz-fuzzer 13327 310418 24642 0 3 0x10008a pause ksh 24642 26968 20256 0 3 0x92 select sshd 9429 376363 1 0 3 0x100083 ttyin getty 20256 98687 1 0 3 0x80 select sshd 76524 328836 47193 74 3 0x100092 bpf pflogd 47193 294648 1 0 3 0x80 netio pflogd 92424 52028 63613 73 2 0x100090 syslogd 63613 380242 1 0 3 0x100082 netio syslogd 67405 15299 1 77 3 0x100090 poll dhclient 72557 416576 1 0 3 0x80 poll dhclient 53362 21447 0 0 3 0x14200 bored smr 22670 100519 0 0 2 0x14200 zerothread 76594 300925 0 0 3 0x14200 aiodoned aiodoned 84142 210398 0 0 3 0x14200 syncer update 21663 192295 0 0 3 0x14200 cleaner cleaner 27828 119839 0 0 7 0x14200 reaper 77362 285790 0 0 3 0x14200 pgdaemon pagedaemon 36821 90358 0 0 3 0x14200 bored crynlk 84509 413880 0 0 3 0x14200 bored crypto 34798 131059 0 0 3 0x40014200 acpi0 acpi0 89400 33819 0 0 3 0x40014200 idle1 25276 338043 0 0 3 0x14200 bored softnet 1366 74438 0 0 3 0x14200 bored systqmp 68560 294391 0 0 3 0x14200 bored systq 6072 262816 0 0 2 0x40014200 softclock 83471 346650 0 0 3 0x40014200 idle0 1 310141 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 72325 (syz-executor.0) thread 0xffff800020e95750 (297155) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829062a8) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9553 6444K 6829K 78643K 12231 0 pcb 13 8K 8K 78643K 205 0 rtable 167 22K 23K 78643K 2673 0 ifaddr 113 22K 23K 78643K 301 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 79 0 ioctlops 0 0K 4K 78643K 3940 0 iov 0 0K 16K 78643K 163 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1881 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 63 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 77 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 4693 0 sigio 0 0K 0K 78643K 783 0 proc 61 63K 95K 78643K 705 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 71 0 in_multi 74 3K 4K 78643K 275 0 ether_multi 1 0K 0K 78643K 24 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 336 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 158 57K 73K 78643K 14855 0 UVM aobj 120 3K 3K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 144 0 NDP 16 0K 0K 78643K 57 0 temp 159 3885K 3965K 78643K 28328 0 kqueue 3 4K 12K 78643K 54 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 12 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 3474 0 3472 1 0 1 1 0 8 0 rtentry 112 113 0 78 2 0 2 2 0 8 0 unpcb 120 2926 0 2916 1 0 1 1 0 8 0 syncache 264 13 0 13 7 7 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 285 0 285 2 2 0 1 0 8 0 tcpcb 544 1365 0 1359 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 296 9157 0 9150 12 10 2 2 0 8 1 rttmr 72 4 0 3 1 0 1 1 0 8 0 nd6 48 36 0 33 1 0 1 1 0 8 0 pkpcb 40 45 0 45 7 7 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 44 0 43 4 3 1 1 0 482 0 pffrnode 88 44 0 43 4 3 1 1 0 8 0 pffrent 40 1807 0 1806 4 3 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 pfrke_plain 160 121 0 107 2 1 1 1 0 8 0 pfrktable 1344 896 0 863 5 2 3 4 0 8 0 pfpktdelay 56 3 0 3 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 456 0 451 1 0 1 1 0 8 0 pfstkey 112 618 0 613 3 2 1 3 0 8 0 pfstate 328 317 0 312 5 4 1 4 0 8 0 pfrule 1360 793 0 97 61 2 59 59 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 461 0 266 16 3 13 15 0 8 0 art_table 32 463 0 266 2 0 2 2 0 8 0 art_node 16 107 0 78 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 21 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 75 0 65 1 0 1 1 0 8 0 shmpl 112 133 0 17 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6637 0 5231 91 2 89 89 0 8 0 ffsino 272 6637 0 5231 98 4 94 95 0 8 0 nchpl 144 12254 0 10652 62 1 61 61 0 8 0 rtmask 32 82 0 78 1 0 1 1 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 32233 0 32233 9 8 1 1 0 8 1 percpumem 16 50 0 18 1 0 1 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 593 0 83 16 0 16 16 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 35581 0 35581 18 17 1 7 0 8 1 plimitpl 152 97 0 89 1 0 1 1 0 8 0 sigapl 424 4925 0 4873 6 0 6 6 0 8 0 futexpl 56 53466 0 53466 8 7 1 1 0 8 1 knotepl 112 162 0 143 1 0 1 1 0 8 0 kqueuepl 144 182 0 180 1 0 1 1 0 8 0 pipepl 304 488 0 477 13 11 2 3 0 8 1 fdescpl 496 4887 0 4871 3 0 3 3 0 8 0 filepl 152 29195 0 29093 9 4 5 7 0 8 1 lockfpl 104 300 0 299 1 0 1 1 0 8 0 lockfspl 48 109 0 108 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 1044 0 1035 1 0 1 1 0 8 0 zombiepl 144 4873 0 4872 6 5 1 1 0 8 0 processpl 992 4925 0 4872 8 1 7 7 0 8 0 procpl 624 13928 0 13864 12 6 6 6 0 8 0 sosppl 128 9 0 9 5 4 1 1 0 8 1 sockpl 400 15615 0 15596 22 18 4 4 0 8 2 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 233 0 0 22 2 20 22 0 8 0 mtagpl 96 69 0 0 2 0 2 2 0 8 0 mbufpl 256 735 0 0 27 0 27 27 0 8 0 bufpl 280 9275 0 3040 446 0 446 446 0 8 0 anonpl 16 379666 0 362432 137 52 85 85 0 124 8 amapchunkpl 152 25969 0 25825 45 32 13 20 0 158 4 amappl16 192 18130 0 17149 123 64 59 60 0 8 8 amappl15 184 2300 0 2297 1 0 1 1 0 8 0 amappl14 176 24 0 20 1 0 1 1 0 8 0 amappl13 168 2258 0 2253 1 0 1 1 0 8 0 amappl12 160 2222 0 2220 2 1 1 1 0 8 0 amappl11 152 67 0 52 1 0 1 1 0 8 0 amappl10 144 2224 0 2217 1 0 1 1 0 8 0 amappl9 136 396 0 393 1 0 1 1 0 8 0 amappl8 128 498 0 435 3 0 3 3 0 8 0 amappl7 120 141 0 127 1 0 1 1 0 8 0 amappl6 112 25 0 19 1 0 1 1 0 8 0 amappl5 104 4796 0 4777 1 0 1 1 0 8 0 amappl4 96 530 0 502 1 0 1 1 0 8 0 amappl3 88 228 0 223 1 0 1 1 0 8 0 amappl2 80 42538 0 42453 2 0 2 2 0 8 0 amappl1 72 108270 0 107802 23 13 10 18 0 8 0 amappl 80 14206 0 14155 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 64 135 0 16 2 0 2 2 0 8 0 uaddrrnd 24 4895 0 4874 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4895 0 4874 1 0 1 1 0 8 0 vmmpekpl 168 35700 0 35649 3 0 3 3 0 8 0 vmmpepl 168 587595 0 585271 207 95 112 128 0 357 8 vmsppl 368 4894 0 4873 2 0 2 2 0 8 0 pdppl 4096 9797 0 9751 7 1 6 6 0 8 0 pvpl 32 1081321 0 1061885 320 123 197 197 0 265 30 pmappl 232 4894 0 4873 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 383 0 48 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d00,ffff800021f91bd8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f91a20) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3f90d8,ffff800021f91bd8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bfaa38,ffff800021f91bd8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e95750,f0,ffff800021f91bd8,0,ffff800021f91cc0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e95750,ffff800021f91c70,ffff800021f91cc0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f91d40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f91d40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0ea2703810, 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 __sanitizer_cov_trace_cmp4(206f51,206f52) at __sanitizer_cov_trace_cmp4+0x44 kd_curproc sys/dev/kcov.c:411 [inline] __sanitizer_cov_trace_cmp4(206f51,206f52) at __sanitizer_cov_trace_cmp4+0x44 trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_cmp4(206f51,206f52) at __sanitizer_cov_trace_cmp4+0x44 sys/dev/kcov.c:135 __mp_lock(ffffffff829060a0) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829060a0) at __mp_lock+0x139 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800020dcf960,1) at uvm_unmap_detach+0xe7 sys/uvm/uvm_map.c:1581 uvm_map_teardown(fffffd807efff170) at uvm_map_teardown+0x25c sys/uvm/uvm_map.c:2757 uvmspace_free(fffffd807efff170) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3646 uvm_exit(ffff800021f40038) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297 reaper(ffff800020d89110) at reaper+0x189 sys/kern/kern_exit.c:456 end trace frame: 0x0, count: -10