uvm_fault(0xffffffff826417a0, 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(0xffffffff826417a0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800022017a18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800022017850, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800022017a18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022017860) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e32e008,ffff800022017a18,10,fffffd807f7bf4e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067df5ef0,ffff800022017a18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800022d7fd60,f0,ffff800022017a18,0,ffff800022017b00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800022d7fd60,ffff800022017ab0,ffff800022017b00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022017b80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022017b80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xba664713200, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff8000220177a0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000a25080 rax 0xffffffff81478573 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x34559ab4a05f1d76 r11 0x3c201b6b34ca7e43 r12 0 r13 0x3da r14 0xffff800000a3b660 r15 0xffff800022017a18 rip 0xffffffff81478578 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800022017740 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=340878 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec64f8,0xffffffff826aa8a0 process=0xffff800022f89740 user=0xffff800022012000, vmspace=0xfffffd807f000000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 98351 123984 33743 0 7 0 syz-executor.1 *98351 340878 33743 0 7 0x4000000 syz-executor.1 15397 230282 0 0 3 0x14280 nfsidl nfsio 921 410052 0 0 3 0x14280 nfsidl nfsio 20923 236940 0 0 3 0x14280 nfsidl nfsio 79918 373168 0 0 3 0x14280 nfsidl nfsio 64377 20066 0 0 3 0x14280 nfsidl nfsio 10097 507007 0 0 3 0x14280 nfsidl nfsio 91845 192566 0 0 3 0x14280 nfsidl nfsio 72610 333600 0 0 3 0x14280 nfsidl nfsio 38323 314404 0 0 3 0x14280 nfsidl nfsio 39726 475735 0 0 3 0x14280 nfsidl nfsio 23525 359453 0 0 3 0x14280 nfsidl nfsio 95938 326346 0 0 3 0x14280 nfsidl nfsio 80014 489155 0 0 3 0x14280 nfsidl nfsio 67167 468719 0 0 3 0x14280 nfsidl nfsio 80258 443088 0 0 3 0x14280 nfsidl nfsio 81543 523930 0 0 3 0x14280 nfsidl nfsio 39599 105539 0 0 3 0x14280 nfsidl nfsio 89685 107240 0 0 3 0x14280 nfsidl nfsio 53284 141631 0 0 3 0x14280 nfsidl nfsio 45238 285235 0 0 3 0x14280 nfsidl nfsio 33743 70714 25886 0 3 0x82 nanosleep syz-executor.1 43068 217340 0 0 3 0x14200 bored sosplice 62655 200471 25886 0 3 0x82 nanosleep syz-executor.0 25886 251004 58876 0 3 0x82 thrsleep syz-fuzzer 25886 475470 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 167494 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 45306 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 244421 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 199558 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 503344 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 474599 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 113124 58876 0 3 0x4000082 thrsleep syz-fuzzer 25886 70490 58876 0 3 0x4000082 kqread syz-fuzzer 58876 56162 70478 0 3 0x10008a pause ksh 70478 495336 8580 0 3 0x92 select sshd 81681 441022 1 0 3 0x100083 ttyin getty 8580 203020 1 0 3 0x80 select sshd 61057 360185 66212 74 3 0x100092 bpf pflogd 66212 381037 1 0 3 0x80 netio pflogd 92441 403987 36849 73 3 0x100090 kqread syslogd 36849 393467 1 0 3 0x100082 netio syslogd 40857 404938 1 77 3 0x100090 poll dhclient 54562 66511 1 0 3 0x80 poll dhclient 29100 497248 0 0 3 0x14200 bored smr 51873 375789 0 0 3 0x14200 pgzero zerothread 32311 302366 0 0 3 0x14200 aiodoned aiodoned 48400 240145 0 0 3 0x14200 syncer update 89325 423772 0 0 3 0x14200 cleaner cleaner 87421 6835 0 0 3 0x14200 reaper reaper 48737 253163 0 0 3 0x14200 pgdaemon pagedaemon 96841 63593 0 0 3 0x14200 bored crynlk 28970 253962 0 0 3 0x14200 bored crypto 49394 117205 0 0 3 0x40014200 acpi0 acpi0 38808 3133 0 0 3 0x40014200 idle1 3434 320356 0 0 3 0x14200 bored softnet 37769 39210 0 0 3 0x14200 bored systqmp 57348 340761 0 0 3 0x14200 bored systq 84046 258539 0 0 3 0x40014200 bored softclock 69793 11712 0 0 3 0x40014200 idle0 1 506892 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 98351 (syz-executor.1) thread 0xffff800022d7fd60 (340878) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff826906e8) #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 9542 6550K 7067K 78643K 11588 0 pcb 13 8K 8K 78643K 107 0 rtable 97 4K 4K 78643K 379 0 ifaddr 91 17K 18K 78643K 146 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1511 0 iov 0 0K 16K 78643K 47 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1512 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 12 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 61 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 516 0 sigio 0 0K 0K 78643K 1 0 proc 62 63K 83K 78643K 538 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 34 0 in_multi 77 3K 3K 78643K 122 0 ether_multi 1 0K 0K 78643K 11 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 256 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 129 71K 81K 78643K 2657 0 UVM aobj 24 2K 2K 78643K 30 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 58 0 NDP 14 0K 0K 78643K 28 0 temp 111 3039K 3105K 78643K 5643 0 kqueue 5 5K 13K 78643K 43 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 12 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 48 0 46 1 0 1 1 0 8 0 rtentry 112 74 0 37 2 0 2 2 0 8 0 unpcb 120 513 0 503 1 0 1 1 0 8 0 syncache 264 8 0 8 3 2 1 1 0 8 1 tcpqe 32 38 0 38 1 1 0 1 0 8 0 tcpcb 544 803 0 799 3 1 2 2 0 8 1 inpcb 280 1161 0 1154 3 1 2 2 0 8 1 rttmr 72 3 0 3 2 2 0 1 0 8 0 nd6 48 11 0 4 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 7 0 7 2 1 1 1 0 482 1 pffrnode 88 7 0 7 2 1 1 1 0 8 1 pffrent 40 143 0 143 2 1 1 1 0 8 1 pfosfp 40 847 0 423 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfstitem 24 65 0 8 1 0 1 1 0 8 0 pfstkey 112 65 0 8 2 0 2 2 0 8 0 pfstate 328 65 0 8 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 353 0 141 14 0 14 14 0 8 0 art_table 32 355 0 141 2 0 2 2 0 8 0 art_node 16 73 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 11 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 57 0 47 1 0 1 1 0 8 0 shmpl 112 28 0 6 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2080 0 676 89 0 89 89 0 8 0 ffsino 272 2080 0 676 95 0 95 95 0 8 0 nchpl 144 2970 0 1375 60 0 60 60 0 8 0 uvmvnodes 72 2354 0 0 43 0 43 43 0 8 0 vnodes 208 2354 0 0 124 0 124 124 0 8 0 namei 1024 8122 0 8122 1 0 1 1 0 8 1 percpumem 16 40 0 8 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scsiplug 64 3 0 3 2 1 1 1 0 8 1 scxspl 192 8250 0 8250 9 8 1 7 0 8 1 plimitpl 152 42 0 34 1 0 1 1 0 8 0 sigapl 424 749 0 697 6 0 6 6 0 8 0 futexpl 56 7492 0 7492 1 0 1 1 0 8 1 knotepl 112 116 0 97 1 0 1 1 0 8 0 kqueuepl 144 74 0 70 1 0 1 1 0 8 0 pipelkpl 48 149 0 139 1 0 1 1 0 8 0 pipepl 120 298 0 279 1 0 1 1 0 8 0 fdescpl 496 713 0 697 3 0 3 3 0 8 0 filepl 152 4470 0 4370 6 1 5 6 0 8 1 lockfpl 104 64 0 63 1 0 1 1 0 8 0 lockfspl 48 26 0 25 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 96 287 0 278 1 0 1 1 0 8 0 zombiepl 144 697 0 696 1 0 1 1 0 8 0 processpl 984 749 0 696 7 0 7 7 0 8 0 procpl 624 1829 0 1766 6 0 6 6 0 8 1 sosppl 128 13 0 13 2 1 1 1 0 8 1 sockpl 400 1725 0 1706 6 2 4 6 0 8 2 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 0 24 24 0 8 0 mtagpl 80 51 0 0 2 0 2 2 0 8 0 mbufpl 256 368 0 0 21 0 21 21 0 8 0 bufpl 280 4343 0 135 301 0 301 301 0 8 0 anonpl 16 87714 0 72669 85 12 73 77 0 124 8 amapchunkpl 152 4546 0 4410 21 5 16 20 0 158 9 amappl16 192 3438 0 2616 61 11 50 53 0 8 6 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 255 0 247 1 0 1 1 0 8 0 amappl13 168 277 0 272 1 0 1 1 0 8 0 amappl12 160 238 0 233 2 1 1 1 0 8 0 amappl11 152 59 0 44 1 0 1 1 0 8 0 amappl10 144 30 0 26 1 0 1 1 0 8 0 amappl9 136 380 0 379 1 0 1 1 0 8 0 amappl8 128 374 0 340 2 0 2 2 0 8 0 amappl7 120 126 0 111 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 476 0 461 1 0 1 1 0 8 0 amappl4 96 898 0 862 1 0 1 1 0 8 0 amappl3 88 250 0 243 1 0 1 1 0 8 0 amappl2 80 4783 0 4714 2 0 2 2 0 8 0 amappl1 72 25080 0 24631 23 13 10 18 0 8 0 amappl 80 2088 0 2041 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 29 0 6 1 0 1 1 0 8 0 uaddrrnd 24 717 0 697 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 717 0 697 1 0 1 1 0 8 0 vmmpekpl 168 9142 0 9109 2 0 2 2 0 8 0 vmmpepl 168 94248 0 92250 129 19 110 118 0 357 16 vmsppl 368 716 0 697 2 0 2 2 0 8 0 pdppl 4096 1442 0 1398 6 0 6 6 0 8 0 pvpl 32 257192 0 238931 188 12 176 184 0 265 23 pmappl 232 716 0 697 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 282 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(ffffffff82519ff0) 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(ffffffff826904e0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) 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 __mp_lock(ffffffff826904e0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff826904e0) at __mp_lock+0x127 sys/kern/kern_lock.c:147 syscall(ffff800021f772e0) at syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff800021f772e0) at syscall+0x400 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7720, count: -9 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800022017a18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022017860) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e32e008,ffff800022017a18,10,fffffd807f7bf4e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067df5ef0,ffff800022017a18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800022d7fd60,f0,ffff800022017a18,0,ffff800022017b00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800022d7fd60,ffff800022017ab0,ffff800022017b00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022017b80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022017b80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xba664713200, count: -8