uvm_fault(0xffffffff82540808, 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(0xffffffff82540808, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800021f87908,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f87740, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800021f87908,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f87750) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806edf94e8,ffff800021f87908,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bf6c90,ffff800021f87908,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7128,f0,ffff800021f87908,0,ffff800021f879f0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7128,ffff800021f879a0,ffff800021f879f0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f87a70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f87a70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9bf48f16660, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f87690 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff8000009d8480 rax 0xffffffff8120a123 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x85806aa4933d1d5b r11 0x33f319ccf026a702 r12 0 r13 0x3da r14 0xffff800000a29660 r15 0xffff800021f87908 rip 0xffffffff8120a128 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f87630 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=279649 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec7608,0xffff800020ec7af8 process=0xffff800020e92f80 user=0xffff800021f82000, vmspace=0xfffffd806e953a18 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 27640 44269 11982 0 2 0 syz-executor.0 5580 319111 31913 0 7 0 syz-executor.1 * 5580 279649 31913 0 7 0x4000000 syz-executor.1 34117 173435 0 0 3 0x14200 acct acct 68054 136734 1 0 3 0x100083 ttyin getty 21466 339944 0 0 3 0x14200 bored sosplice 31913 377934 55290 0 3 0x82 nanosleep syz-executor.1 11982 327510 55290 0 3 0x82 nanosleep syz-executor.0 55290 474722 14815 0 3 0x82 thrsleep syz-fuzzer 55290 99251 14815 0 3 0x4000082 nanosleep syz-fuzzer 55290 397671 14815 0 3 0x4000082 thrsleep syz-fuzzer 55290 284562 14815 0 3 0x4000082 thrsleep syz-fuzzer 55290 349137 14815 0 3 0x4000082 thrsleep syz-fuzzer 55290 37443 14815 0 3 0x4000082 thrsleep syz-fuzzer 55290 173711 14815 0 3 0x4000082 thrsleep syz-fuzzer 55290 481214 14815 0 3 0x4000082 kqread syz-fuzzer 55290 49186 14815 0 3 0x4000082 nanosleep syz-fuzzer 55290 390970 14815 0 3 0x4000082 thrsleep syz-fuzzer 14815 43490 7088 0 3 0x10008a pause ksh 7088 383579 33862 0 3 0x92 select sshd 33862 423104 1 0 3 0x80 select sshd 32560 467168 89431 74 3 0x100092 bpf pflogd 89431 148670 1 0 3 0x80 netio pflogd 24669 310708 43742 73 3 0x100090 kqread syslogd 43742 426060 1 0 3 0x100082 netio syslogd 88110 278610 1 77 3 0x100090 poll dhclient 68876 113822 1 0 3 0x80 poll dhclient 89588 30532 0 0 3 0x14200 bored smr 88683 201832 0 0 3 0x14200 pgzero zerothread 68339 315862 0 0 3 0x14200 aiodoned aiodoned 95348 73267 0 0 3 0x14200 syncer update 11902 351768 0 0 3 0x14200 cleaner cleaner 64731 158873 0 0 3 0x14200 reaper reaper 5508 160923 0 0 3 0x14200 pgdaemon pagedaemon 56821 148902 0 0 3 0x14200 bored crynlk 26998 108496 0 0 3 0x14200 bored crypto 40709 450726 0 0 3 0x40014200 acpi0 acpi0 61785 40103 0 0 3 0x40014200 idle1 42527 19713 0 0 3 0x14200 bored softnet 51533 3841 0 0 3 0x14200 bored systqmp 40917 327903 0 0 3 0x14200 bored systq 13815 56173 0 0 3 0x40014200 bored softclock 96880 156599 0 0 3 0x40014200 idle0 1 421671 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 5580 (syz-executor.1) thread 0xffff800020ec7128 (279649) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8265c988) #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 9512 6413K 7117K 78643K 11224 0 pcb 13 8K 8K 78643K 83 0 rtable 86 3K 3K 78643K 298 0 ifaddr 67 13K 14K 78643K 121 0 counters 43 33K 34K 78643K 61 0 ioctlops 0 0K 4K 78643K 1490 0 iov 0 0K 16K 78643K 44 0 mount 1 1K 1K 78643K 1 0 vnodes 1227 77K 78K 78643K 1409 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 64 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 334 0 sigio 0 0K 0K 78643K 12 0 proc 61 63K 95K 78643K 479 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 31 0 in_multi 37 2K 2K 78643K 77 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 225 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 122 55K 55K 78643K 2071 0 UVM aobj 11 6K 6K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 44 0 NDP 11 0K 0K 78643K 25 0 temp 105 3044K 3108K 78643K 6153 0 kqueue 3 4K 12K 78643K 38 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 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 57 0 24 2 0 2 2 0 8 0 unpcb 120 295 0 285 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 156 0 156 1 1 0 1 0 8 0 tcpcb 544 133 0 129 1 0 1 1 0 8 0 inpcb 280 810 0 803 3 1 2 2 0 8 1 nd6 48 7 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 1 0 1 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 4 0 4 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 pfstitem 24 33 0 9 1 0 1 1 0 8 0 pfstkey 112 33 0 9 1 0 1 1 0 8 0 pfstate 328 33 0 9 3 0 3 3 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 256 229 0 86 12 2 10 12 0 8 0 art_table 32 230 0 86 2 0 2 2 0 8 0 art_node 16 56 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 58 0 48 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1856 0 449 89 0 89 89 0 8 0 ffsino 272 1856 0 449 95 0 95 95 0 8 0 nchpl 144 2490 0 895 60 0 60 60 0 8 0 uvmvnodes 72 2034 0 0 37 0 37 37 0 8 0 vnodes 208 2034 0 0 108 0 108 108 0 8 0 namei 1024 6892 0 6892 1 0 1 1 0 8 1 percpumem 16 41 0 9 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 2 1 0 1 1 0 8 0 scxspl 192 7139 0 7139 8 7 1 5 0 8 1 plimitpl 152 49 0 41 1 0 1 1 0 8 0 sigapl 424 552 0 518 4 0 4 4 0 8 0 futexpl 56 5180 0 5180 1 0 1 1 0 8 1 knotepl 112 100 0 81 1 0 1 1 0 8 0 kqueuepl 144 54 0 52 1 0 1 1 0 8 0 pipelkpl 48 143 0 133 1 0 1 1 0 8 0 pipepl 120 286 0 267 2 0 2 2 0 8 1 fdescpl 496 535 0 518 3 0 3 3 0 8 0 filepl 152 3388 0 3287 6 0 6 6 0 8 2 lockfpl 104 49 0 47 1 0 1 1 0 8 0 lockfspl 48 20 0 18 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 308 0 299 1 0 1 1 0 8 0 zombiepl 144 518 0 518 1 0 1 1 0 8 1 processpl 984 552 0 518 5 0 5 5 0 8 0 procpl 624 1301 0 1257 4 0 4 4 0 8 0 sosppl 128 11 0 11 3 2 1 1 0 8 1 sockpl 400 1130 0 1111 5 1 4 4 0 8 2 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 160 0 0 19 0 19 19 0 8 0 mtagpl 80 33 0 0 1 0 1 1 0 8 0 mbufpl 256 214 0 0 12 0 12 12 0 8 0 bufpl 280 4205 0 139 291 0 291 291 0 8 0 anonpl 16 58017 0 43602 60 1 59 59 0 124 0 amapchunkpl 152 3274 0 3133 20 14 6 20 0 158 0 amappl16 192 2243 0 1474 40 1 39 39 0 8 0 amappl15 184 143 0 141 2 1 1 1 0 8 0 amappl14 176 24 0 19 1 0 1 1 0 8 0 amappl13 168 28 0 26 1 0 1 1 0 8 0 amappl12 160 16 0 11 2 1 1 1 0 8 0 amappl11 152 215 0 199 1 0 1 1 0 8 0 amappl10 144 23 0 18 1 0 1 1 0 8 0 amappl9 136 384 0 383 1 0 1 1 0 8 0 amappl8 128 359 0 324 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 185 0 180 2 1 1 1 0 8 0 amappl5 104 278 0 261 1 0 1 1 0 8 0 amappl4 96 650 0 621 1 0 1 1 0 8 0 amappl3 88 112 0 107 1 0 1 1 0 8 0 amappl2 80 3470 0 3397 2 0 2 2 0 8 0 amappl1 72 21693 0 21259 23 12 11 18 0 8 0 amappl 80 1549 0 1502 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 540 0 520 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 540 0 520 1 0 1 1 0 8 0 vmmpekpl 168 8316 0 8285 2 0 2 2 0 8 0 vmmpepl 168 71809 0 69815 111 21 90 103 0 357 3 vmsppl 368 539 0 520 2 0 2 2 0 8 0 pdppl 4096 1088 0 1043 6 0 6 6 0 8 0 pvpl 32 200116 0 182530 152 8 144 151 0 265 2 pmappl 232 539 0 520 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 258 0 6 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(ffffffff824d8ff0) 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(8f7e4,8f7e5) at __sanitizer_cov_trace_cmp4+0x15 trace_cmp sys/dev/kcov.c:132 [inline] __sanitizer_cov_trace_cmp4(8f7e4,8f7e5) at __sanitizer_cov_trace_cmp4+0x15 sys/dev/kcov.c:170 __mp_lock(ffffffff8265c780) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8265c780) at __mp_lock+0x139 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_const_cmp4(0,0) at __sanitizer_cov_trace_const_cmp4+0x10 sys/dev/kcov.c:197 userret(ffff800020ec7608) at userret+0x1fa sys/kern/kern_sig.c:1878 syscall(ffff8000231890c0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff8000231890c0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe2790, count: -11 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800021f87908,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f87750) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806edf94e8,ffff800021f87908,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bf6c90,ffff800021f87908,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7128,f0,ffff800021f87908,0,ffff800021f879f0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7128,ffff800021f879a0,ffff800021f879f0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f87a70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f87a70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9bf48f16660, count: -8