uvm_fault(0xffffffff8253c8b0, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xffffffff8253c8b0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(ffff800000abc000,ffff800015920b58,10) at tun_dev_read+0x2ab sys/net/if_tun.c:825 end trace frame: 0xffff800015920990, count: 0 ddb> trace tun_dev_read(ffff800000abc000,ffff800015920b58,10) at tun_dev_read+0x2ab sys/net/if_tun.c:825 spec_read(ffff8000159209a0) at spec_read+0xe9 sys/kern/spec_vnops.c:222 VOP_READ(fffffd803e7a8750,ffff800015920b58,10,fffffd803f7c6a80) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd803620c3c8,ffff800015920b58,0) at vn_read+0x11f sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000ffff8008,f0,ffff800015920b58,0,ffff800015920c40) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff8000ffff8008,ffff800015920bf0,ffff800015920c40) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800015920cc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x46101f5ad30, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000159208e0 rbx 0x3b2 rdx 0x1ba rcx 0xffff800017b4c000 rax 0xffff800000a5fe40 r8 0x7f7fffffc000 r9 0x5 r10 0xd1867dec5a159e50 r11 0xb6b0d247073a421e r12 0xffff800015920b58 r13 0x10 r14 0xfffffd0000000000 r15 0 rip 0xffffffff812f84fb tun_dev_read+0x2ab cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800015920870 ss 0x10 tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=195751 stat=onproc flags process=0 proc=4000000 pri=73, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8280,0xffffffff8257ec70 process=0xffff8000ffffb448 user=0xffff80001591b000, vmspace=0xfffffd803f012bb0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 12714 29621 42589 0 2 0 syz-executor.1 *12714 195751 42589 0 7 0x4000000 syz-executor.1 46020 79798 1 0 3 0x100083 ttyin getty 74272 454677 39960 0 2 0x2 syz-executor.0 42589 206283 39960 0 2 0x482 syz-executor.1 22845 457311 0 0 3 0x14200 bored sosplice 39960 27340 57524 0 3 0x82 thrsleep syz-fuzzer 39960 264109 57524 0 2 0x4000482 syz-fuzzer 39960 274008 57524 0 3 0x4000082 kqread syz-fuzzer 39960 521343 57524 0 3 0x4000082 thrsleep syz-fuzzer 39960 165171 57524 0 3 0x4000082 thrsleep syz-fuzzer 39960 513379 57524 0 3 0x4000082 thrsleep syz-fuzzer 39960 434714 57524 0 3 0x4000082 thrsleep syz-fuzzer 39960 414259 57524 0 3 0x4000082 thrsleep syz-fuzzer 57524 510665 43573 0 3 0x10008a pause ksh 43573 183397 12551 0 3 0x92 select sshd 12551 248372 1 0 3 0x80 select sshd 54317 201000 95007 73 3 0x100090 kqread syslogd 95007 213803 1 0 3 0x100082 netio syslogd 6478 319201 1 77 3 0x100090 poll dhclient 45008 147746 1 0 3 0x80 poll dhclient 50850 384643 0 0 2 0x14200 zerothread 2997 408941 0 0 3 0x14200 aiodoned aiodoned 78690 40837 0 0 3 0x14200 syncer update 56337 436372 0 0 3 0x14200 cleaner cleaner 94815 228309 0 0 3 0x14200 reaper reaper 51974 92901 0 0 3 0x14200 pgdaemon pagedaemon 14708 231519 0 0 3 0x14200 bored crynlk 75185 481869 0 0 3 0x14200 bored crypto 60980 97608 0 0 3 0x40014200 acpi0 acpi0 51903 252903 0 0 3 0x14200 bored softnet 48173 416647 0 0 3 0x14200 bored systqmp 61139 296500 0 0 3 0x14200 bored systq 23012 258962 0 0 3 0x40014200 bored softclock 40007 54194 0 0 3 0x40014200 idle0 11155 349685 0 0 3 0x14200 bored smr 1 500534 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9580 7826K 8018K 78643K 15756 0 0 pcb 14 8K 9K 78643K 755 0 0 rtable 104 12K 12K 78643K 707 0 0 ifaddr 84 16K 17K 78643K 287 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 78 0 0 iov 0 0K 24K 78643K 244 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1224 77K 77K 78643K 2729 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 21 0 0 VM map 20 5K 5K 78643K 21 0 0 sem 12 0K 0K 78643K 593 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 1142 0 0 sigio 0 0K 0K 78643K 25 0 0 proc 48 38K 54K 78643K 603 0 0 subproc 32 2K 2K 78643K 85 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 83 0 0 in_multi 83 3K 3K 78643K 153 0 0 ether_multi 1 0K 0K 78643K 7 0 0 mrt 1 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 72 318K 318K 78643K 72 0 0 exec 0 0K 1K 78643K 291 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 137 185K 185K 78643K 4126 0 0 UVM aobj 130 6K 6K 78643K 134 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 1 0K 0K 78643K 937 0 0 NDP 14 0K 0K 78643K 63 0 0 temp 142 3539K 4179K 78643K 45303 0 0 kqueue 0 0K 0K 78643K 20 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 27 0 19 1 0 1 1 0 8 0 rtpcb 80 109 0 107 1 0 1 1 0 8 0 rtentry 112 110 0 71 2 0 2 2 0 8 0 unpcb 120 505 0 497 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 133 0 133 2 2 0 1 0 8 0 tcpcb 544 1063 0 1059 6 5 1 2 0 8 0 ipq 40 15 0 15 6 5 1 1 0 8 1 ipqe 40 418 0 418 6 5 1 1 0 8 1 inpcb 280 2767 0 2757 12 10 2 3 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 13 0 11 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 26 0 26 8 7 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 486 0 286 21 6 15 15 0 8 0 art_table 32 488 0 286 2 0 2 2 0 8 0 art_node 16 109 0 72 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 15 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 589 0 579 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3074 0 1686 46 0 46 46 0 8 0 ffsino 240 3074 0 1686 83 0 83 83 0 8 0 nchpl 144 4872 0 3285 60 0 60 60 0 8 0 uvmvnodes 72 4340 0 0 79 0 79 79 0 8 0 vnodes 208 4340 0 0 229 0 229 229 0 8 0 namei 1024 18156 0 18155 1 0 1 1 0 8 0 vcpupl 1984 19 0 1 3 0 3 3 0 8 0 vmpool 520 19 0 1 2 0 2 2 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 15784 0 15784 13 11 2 7 0 8 2 plimitpl 152 75 0 68 1 0 1 1 0 8 0 sigapl 432 1305 0 1292 2 0 2 2 0 8 0 futexpl 56 41883 0 41883 1 0 1 1 0 8 1 knotepl 112 213 0 194 2 1 1 2 0 8 0 kqueuepl 104 291 0 289 1 0 1 1 0 8 0 pipepl 128 920 0 901 7 6 1 2 0 8 0 fdescpl 424 1306 0 1292 2 0 2 2 0 8 0 filepl 120 12990 0 12890 12 8 4 6 0 8 0 lockfpl 104 334 0 330 1 0 1 1 0 8 0 lockfspl 48 104 0 100 1 0 1 1 0 8 0 sessionpl 112 22 0 12 1 0 1 1 0 8 0 pgrppl 48 38 0 28 1 0 1 1 0 8 0 ucredpl 96 2766 0 2759 1 0 1 1 0 8 0 zombiepl 144 1293 0 1293 1 0 1 1 0 8 1 processpl 864 1322 0 1293 4 0 4 4 0 8 0 procpl 632 3204 0 3167 9 5 4 5 0 8 0 sosppl 128 27 0 27 7 7 0 1 0 8 0 sockpl 384 3409 0 3389 15 12 3 6 0 8 1 mcl64k 65536 589 0 589 63 62 1 32 0 8 1 mcl16k 16384 20 0 20 7 6 1 1 0 8 1 mcl12k 12288 26 0 26 7 6 1 1 0 8 1 mcl9k 9216 19 0 19 7 6 1 1 0 8 1 mcl8k 8192 70 0 70 3 2 1 1 0 8 1 mcl4k 4096 126 0 126 3 2 1 1 0 8 1 mcl2k2 2112 276 0 276 5 4 1 1 0 8 1 mcl2k 2048 69341 0 69295 18 11 7 16 0 8 0 mtagpl 80 61 0 28 3 2 1 1 0 8 0 mbufpl 256 122356 0 122191 85 64 21 24 0 8 8 bufpl 256 11723 0 4753 437 0 437 437 0 8 0 anonpl 16 192590 0 171370 144 42 102 102 0 62 15 amapchunkpl 152 7876 0 7716 36 25 11 20 0 158 3 amappl16 192 9175 0 7997 126 58 68 72 0 8 8 amappl15 184 261 0 261 2 2 0 1 0 8 0 amappl14 176 530 0 524 1 0 1 1 0 8 0 amappl12 160 348 0 345 1 0 1 1 0 8 0 amappl11 152 59 0 48 1 0 1 1 0 8 0 amappl10 144 28 0 24 1 0 1 1 0 8 0 amappl9 136 602 0 598 1 0 1 1 0 8 0 amappl8 128 201 0 167 2 0 2 2 0 8 0 amappl7 120 54 0 49 1 0 1 1 0 8 0 amappl6 112 59 0 51 1 0 1 1 0 8 0 amappl5 104 517 0 505 1 0 1 1 0 8 0 amappl4 96 1554 0 1525 1 0 1 1 0 8 0 amappl3 88 149 0 140 1 0 1 1 0 8 0 amappl2 80 9761 0 9695 3 1 2 3 0 8 0 amappl1 72 32749 0 32339 26 17 9 20 0 8 0 amappl 80 3516 0 3459 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 64 133 0 4 3 0 3 3 0 8 0 uaddrrnd 24 1325 0 1292 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1325 0 1292 1 0 1 1 0 8 0 vmmpekpl 168 13398 0 13370 2 0 2 2 0 8 0 vmmpepl 168 165295 0 163008 226 110 116 143 0 357 10 vmsppl 272 1305 0 1292 2 1 1 2 0 8 0 pdppl 4096 2656 0 2604 8 1 7 7 0 8 0 pvpl 32 532586 0 508180 339 103 236 281 0 265 34 pmappl 200 1324 0 1293 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 744 0 162 18 0 18 18 0 8 0