uvm_fault(0xffffffff82898da8, 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(0xffffffff82898da8, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800022ee7898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800022ee76d0, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff800022ee7898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022ee76e0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2aa278,ffff800022ee7898,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066842d30,ffff800022ee7898,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020dfc9d8,f0,ffff800022ee7898,0,ffff800022ee7980) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020dfc9d8,ffff800022ee7930,ffff800022ee7980) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022ee7a00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ee7a00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf825b5d2de0, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800022ee7620 rbx 0xfffffd0000000000 rdx 0x4cb rcx 0xffff800000addfc0 rax 0xffffffff81e27773 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xdd9fe7effcd3aceb r11 0xe8f76ed66cab1903 r12 0 r13 0x3da r14 0xffff800000b25e60 r15 0xffff800022ee7898 rip 0xffffffff81e27778 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800022ee75c0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=297627 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020dfd608,0xffffffff828c1c80 process=0xffff800020e46028 user=0xffff800022ee2000, vmspace=0xfffffd80699a6460 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63110 223009 10254 0 2 0 syz-executor.1 *63110 297627 10254 0 7 0x4000000 syz-executor.1 79895 368315 1 0 3 0x100083 ttyin getty 54400 193736 9754 0 3 0x82 piperd syz-executor.0 10254 139876 9754 0 3 0x82 nanosleep syz-executor.1 68327 424423 0 0 3 0x14200 bored sosplice 9754 108079 18892 0 3 0x82 thrsleep syz-fuzzer 9754 392245 18892 0 3 0x4000082 nanosleep syz-fuzzer 9754 14338 18892 0 3 0x4000082 thrsleep syz-fuzzer 9754 262769 18892 0 3 0x4000082 kqread syz-fuzzer 9754 58304 18892 0 3 0x4000082 thrsleep syz-fuzzer 9754 74077 18892 0 3 0x4000082 thrsleep syz-fuzzer 9754 296824 18892 0 3 0x4000082 thrsleep syz-fuzzer 9754 60902 18892 0 3 0x4000082 thrsleep syz-fuzzer 9754 336142 18892 0 7 0x4000002 syz-fuzzer 9754 251128 18892 0 3 0x4000082 thrsleep syz-fuzzer 18892 68433 74507 0 3 0x10008a pause ksh 74507 217133 13776 0 3 0x92 select sshd 13776 266124 1 0 3 0x80 select sshd 37104 196553 78388 74 3 0x100092 bpf pflogd 78388 308058 1 0 3 0x80 netio pflogd 74120 496391 81385 73 3 0x100090 kqread syslogd 81385 450851 1 0 3 0x100082 netio syslogd 99852 260234 1 77 3 0x100090 poll dhclient 57182 87282 1 0 3 0x80 poll dhclient 26495 184727 0 0 3 0x14200 bored smr 73022 131473 0 0 2 0x14200 zerothread 66840 264091 0 0 3 0x14200 aiodoned aiodoned 81495 127096 0 0 3 0x14200 syncer update 52063 410779 0 0 3 0x14200 cleaner cleaner 42851 318566 0 0 3 0x14200 reaper reaper 8894 381817 0 0 3 0x14200 pgdaemon pagedaemon 63029 56355 0 0 3 0x14200 bored crynlk 53530 316872 0 0 3 0x14200 bored crypto 29461 487144 0 0 3 0x40014200 acpi0 acpi0 43991 183846 0 0 3 0x40014200 idle1 4901 294350 0 0 3 0x14200 bored softnet 6755 217814 0 0 3 0x14200 bored systqmp 62202 183769 0 0 3 0x14200 bored systq 98393 228317 0 0 3 0x40014200 bored softclock 5197 133588 0 0 3 0x40014200 idle0 1 61315 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 63110 (syz-executor.1) thread 0xffff800020dfc9d8 (297627) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828bebe0) #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 9532 6424K 6805K 78643K 11668 0 pcb 13 8K 8K 78643K 177 0 rtable 105 8K 9K 78643K 778 0 ifaddr 97 19K 20K 78643K 262 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 79 0 ioctlops 0 0K 4K 78643K 1588 0 iov 0 0K 16K 78643K 118 0 mount 1 1K 1K 78643K 1 0 vnodes 1211 76K 77K 78643K 1707 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 105 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 874 0 sigio 0 0K 0K 78643K 22 0 proc 62 63K 95K 78643K 607 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 70 0 in_multi 85 3K 3K 78643K 263 0 ether_multi 1 0K 0K 78643K 21 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 287 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 144 89K 89K 78643K 3891 0 UVM aobj 22 2K 2K 78643K 24 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 127 0 NDP 13 0K 0K 78643K 54 0 temp 137 3860K 3936K 78643K 25214 0 kqueue 4 5K 9K 78643K 49 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 15 0 9 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 63 0 61 1 0 1 1 0 8 0 rtentry 112 127 0 95 2 0 2 2 0 8 0 unpcb 120 429 0 419 1 0 1 1 0 8 0 syncache 264 9 0 9 4 4 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 1299 0 1299 2 2 0 1 0 8 0 tcpcb 544 324 0 319 2 1 1 2 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 296 1609 0 1598 6 4 2 2 0 8 1 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 33 0 29 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1128 7 0 7 5 5 0 1 0 8 0 pffrag 232 6 0 3 1 0 1 1 0 482 0 pffrnode 88 5 0 3 1 0 1 1 0 8 0 pffrent 40 10 0 7 1 0 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 106 0 98 3 2 1 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 30 0 28 1 0 1 1 0 8 0 pfstkey 112 30 0 28 1 0 1 1 0 8 0 pfstate 328 30 0 28 2 1 1 2 0 8 0 pfsrctr 152 130 0 130 1 1 0 1 0 8 0 pfrule 1360 43 0 29 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 494 0 330 14 2 12 13 0 8 0 art_table 32 495 0 330 2 0 2 2 0 8 0 art_node 16 124 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 97 0 87 1 0 1 1 0 8 0 shmpl 112 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2679 0 1276 89 0 89 89 0 8 0 ffsino 272 2679 0 1276 96 1 95 95 0 8 0 nchpl 144 4099 0 2504 60 0 60 60 0 8 0 uvmvnodes 72 2983 0 0 55 0 55 55 0 8 0 vnodes 208 2983 0 0 157 0 157 157 0 8 0 namei 1024 13742 0 13742 4 3 1 1 0 8 1 percpumem 16 50 0 18 1 0 1 1 0 8 0 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 560 9 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 42 0 31 3 2 1 1 0 8 0 scxspl 192 12092 0 12092 13 12 1 6 0 8 1 plimitpl 152 77 0 69 1 0 1 1 0 8 0 sigapl 424 1087 0 1055 4 0 4 4 0 8 0 futexpl 56 14503 0 14503 3 2 1 1 0 8 1 knotepl 112 128 0 109 1 0 1 1 0 8 0 kqueuepl 144 139 0 136 1 0 1 1 0 8 0 pipelkpl 48 200 0 190 1 0 1 1 0 8 0 pipepl 120 400 0 381 1 0 1 1 0 8 0 fdescpl 496 1069 0 1053 3 0 3 3 0 8 0 filepl 152 8129 0 8027 7 2 5 5 0 8 1 lockfpl 104 153 0 152 1 0 1 1 0 8 0 lockfspl 48 54 0 53 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 2347 0 2337 1 0 1 1 0 8 0 zombiepl 144 1055 0 1055 3 2 1 1 0 8 1 processpl 984 1087 0 1055 6 1 5 5 0 8 0 procpl 624 2997 0 2955 4 0 4 4 0 8 0 sosppl 128 12 0 12 5 5 0 1 0 8 0 sockpl 400 2107 0 2084 11 8 3 5 0 8 0 mcl64k 65536 21 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 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 198 0 0 24 0 24 24 0 8 0 mtagpl 96 42 0 0 2 0 2 2 0 8 0 mbufpl 256 362 0 0 16 0 16 16 0 8 0 bufpl 280 5291 0 141 368 0 368 368 0 8 0 anonpl 16 118797 0 100981 108 35 73 85 0 124 0 amapchunkpl 152 6242 0 6092 13 6 7 12 0 158 0 amappl16 192 5556 0 4585 78 28 50 59 0 8 0 amappl15 184 369 0 367 1 0 1 1 0 8 0 amappl14 176 26 0 22 1 0 1 1 0 8 0 amappl13 168 42 0 39 1 0 1 1 0 8 0 amappl12 160 14 0 12 1 0 1 1 0 8 0 amappl11 152 286 0 271 1 0 1 1 0 8 0 amappl10 144 23 0 17 1 0 1 1 0 8 0 amappl9 136 388 0 387 1 0 1 1 0 8 0 amappl8 128 413 0 370 2 0 2 2 0 8 0 amappl7 120 144 0 128 1 0 1 1 0 8 0 amappl6 112 84 0 79 1 0 1 1 0 8 0 amappl5 104 969 0 951 1 0 1 1 0 8 0 amappl4 96 528 0 499 1 0 1 1 0 8 0 amappl3 88 154 0 149 1 0 1 1 0 8 0 amappl2 80 7918 0 7845 2 0 2 2 0 8 0 amappl1 72 33548 0 33110 23 13 10 18 0 8 0 amappl 80 3280 0 3232 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 23 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1078 0 1054 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1078 0 1054 1 0 1 1 0 8 0 vmmpekpl 168 11697 0 11659 2 0 2 2 0 8 0 vmmpepl 168 136751 0 134616 182 84 98 126 0 357 0 vmsppl 368 1077 0 1054 3 0 3 3 0 8 0 pdppl 4096 2163 0 2116 9 2 7 7 0 8 0 pvpl 32 346164 0 326209 239 76 163 196 0 265 0 pmappl 232 1077 0 1054 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 290 0 20 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff800022ee7898,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022ee76e0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2aa278,ffff800022ee7898,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066842d30,ffff800022ee7898,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020dfc9d8,f0,ffff800022ee7898,0,ffff800022ee7980) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020dfc9d8,ffff800022ee7930,ffff800022ee7980) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022ee7a00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022ee7a00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf825b5d2de0, 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: 0xc002ab7558, count: -3