uvm_fault(0xffffffff827c3e88, 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(0xffffffff827c3e88, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023f124f8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 end trace frame: 0xffff800023f12330, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800023f124f8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 spec_read(ffff800023f12340) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed44418,ffff800023f124f8,10,fffffd807f7bfae0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bf0150,ffff800023f124f8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e09768,f0,ffff800023f124f8,0,ffff800023f125e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e09768,ffff800023f12590,ffff800023f125e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f12660) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f12660) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738ddf59070, count: -8 ddb{0}> show registers rdi 0 rsi 0x3aa rbp 0xffff800023f12280 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000ae9200 rax 0xffffffff8169d263 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x4cc8e011c7df6e9e r11 0xce002e035227f593 r12 0 r13 0x3aa r14 0xffff800000ac4678 r15 0xffff800023f124f8 rip 0xffffffff8169d268 tun_dev_read+0x138 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff800023f12220 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=509808 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e09eb8,0xffffffff8292fce0 process=0xffff800020e98fb8 user=0xffff800023f0d000, vmspace=0xfffffd806417c180 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95832 240677 57141 0 3 0x80 fsleep syz-executor.0 *95832 509808 57141 0 7 0x4000000 syz-executor.0 40571 519218 67868 0 3 0x80 fsleep syz-executor.1 40571 91457 67868 0 3 0x4000080 netio syz-executor.1 89118 44365 0 0 3 0x14280 nfsidl nfsio 82520 47437 0 0 3 0x14280 nfsidl nfsio 20691 194401 0 0 3 0x14280 nfsidl nfsio 71040 475393 0 0 3 0x14280 nfsidl nfsio 91404 510642 0 0 3 0x14280 nfsidl nfsio 15445 139727 0 0 3 0x14280 nfsidl nfsio 92443 110397 0 0 3 0x14280 nfsidl nfsio 35726 498118 0 0 3 0x14280 nfsidl nfsio 5084 380445 0 0 3 0x14280 nfsidl nfsio 76352 118655 0 0 3 0x14280 nfsidl nfsio 37374 152191 0 0 3 0x14280 nfsidl nfsio 23915 427167 0 0 3 0x14280 nfsidl nfsio 42839 106485 0 0 3 0x14280 nfsidl nfsio 78006 308189 0 0 3 0x14280 nfsidl nfsio 59237 58230 0 0 3 0x14280 nfsidl nfsio 86934 181099 0 0 3 0x14280 nfsidl nfsio 19654 330125 0 0 3 0x14280 nfsidl nfsio 57628 451421 0 0 3 0x14280 nfsidl nfsio 95318 48091 0 0 3 0x14280 nfsidl nfsio 99883 106831 0 0 3 0x14280 nfsidl nfsio 38880 259289 1 0 3 0x100083 ttyin getty 35515 501121 0 0 3 0x14200 bored sosplice 67868 115866 7836 0 7 0x482 syz-executor.1 57141 290923 7836 0 3 0x82 nanosleep syz-executor.0 7836 139811 9953 0 3 0x82 thrsleep syz-fuzzer 7836 207203 9953 0 3 0x4000082 nanosleep syz-fuzzer 7836 432757 9953 0 3 0x4000082 thrsleep syz-fuzzer 7836 319105 9953 0 3 0x4000082 thrsleep syz-fuzzer 7836 378906 9953 0 3 0x4000082 thrsleep syz-fuzzer 7836 463826 9953 0 3 0x4000082 kqread syz-fuzzer 7836 393154 9953 0 3 0x4000082 thrsleep syz-fuzzer 7836 97501 9953 0 3 0x4000082 thrsleep syz-fuzzer 7836 396328 9953 0 2 0x4000482 syz-fuzzer 7836 307756 9953 0 3 0x4000082 thrsleep syz-fuzzer 9953 64470 54395 0 3 0x10008a pause ksh 54395 44658 76269 0 3 0x92 select sshd 76269 380269 1 0 3 0x80 select sshd 97819 412532 71753 74 3 0x100092 bpf pflogd 71753 70784 1 0 3 0x80 netio pflogd 70746 57406 30173 73 3 0x100090 kqread syslogd 30173 65035 1 0 3 0x100082 netio syslogd 41301 318027 1 77 3 0x100090 poll dhclient 45819 297155 1 0 3 0x80 poll dhclient 63183 314789 0 0 3 0x14200 bored smr 34599 46595 0 0 3 0x14200 pgzero zerothread 46424 198875 0 0 3 0x14200 aiodoned aiodoned 83055 101498 0 0 3 0x14200 syncer update 81706 513341 0 0 3 0x14200 cleaner cleaner 5045 484210 0 0 3 0x14200 reaper reaper 12596 504801 0 0 3 0x14200 pgdaemon pagedaemon 48059 87775 0 0 3 0x14200 bored crynlk 33876 343750 0 0 3 0x14200 bored crypto 46688 163030 0 0 3 0x40014200 acpi0 acpi0 67035 163206 0 0 3 0x40014200 idle1 95752 476089 0 0 3 0x14200 bored softnet 39028 454154 0 0 3 0x14200 bored systqmp 13306 165468 0 0 3 0x14200 bored systq 62454 246015 0 0 3 0x40014200 bored softclock 53605 149667 0 0 3 0x40014200 idle0 1 51286 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 95832 (syz-executor.0) thread 0xffff800020e09768 (509808) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828e6a68) #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 9552 6454K 7149K 78643K 12232 0 pcb 14 8K 8K 78643K 1345 0 rtable 126 17K 20K 78643K 813 0 ifaddr 114 22K 24K 78643K 299 0 sysctl 0 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 85 0 ioctlops 0 0K 4K 78643K 1735 0 iov 0 0K 16K 78643K 155 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1747 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 27 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 367 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 1529 0 sigio 0 0K 0K 78643K 10 0 proc 62 63K 95K 78643K 581 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 123 0 in_multi 100 4K 4K 78643K 262 0 ether_multi 1 0K 0K 78643K 12 0 mrt 0 0K 0K 78643K 32 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 1K 78643K 301 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 153 121K 122K 78643K 5873 0 UVM aobj 48 3K 3K 78643K 83 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 121 0 NDP 16 0K 0K 78643K 66 0 temp 158 3881K 3945K 78643K 19440 0 kqueue 3 4K 22K 78643K 61 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 11 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 94 0 92 1 0 1 1 0 8 0 rtentry 112 132 0 93 2 0 2 2 0 8 0 unpcb 120 743 0 733 1 0 1 1 0 8 0 syncache 264 16 0 16 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 1603 0 1603 2 2 0 1 0 8 0 tcpcb 544 413 0 407 8 7 1 2 0 8 0 inpcb 296 2516 0 2508 7 5 2 2 0 8 1 rttmr 72 16 0 16 7 7 0 1 0 8 0 nd6 48 37 0 33 1 0 1 1 0 8 0 pkpcb 40 12 0 12 5 5 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 4 0 4 3 3 0 1 0 8 0 pfstscr 40 4 0 4 2 2 0 1 0 8 0 pffrag 232 7 0 6 6 5 1 1 0 482 0 pffrnode 88 7 0 6 6 5 1 1 0 8 0 pffrent 40 19 0 18 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 pfrktable 1344 88 0 77 6 5 1 2 0 8 0 pfstitem 24 27 0 25 1 0 1 1 0 8 0 pfstkey 112 31 0 29 1 0 1 1 0 8 0 pfstate 328 27 0 25 2 1 1 2 0 8 0 pfrule 1360 66 0 44 3 1 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 559 0 371 17 5 12 14 0 8 0 art_table 32 561 0 371 2 0 2 2 0 8 0 art_node 16 131 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 13 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 359 0 349 1 0 1 1 0 8 0 shmpl 112 80 0 35 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3384 0 1984 90 2 88 89 0 8 0 ffsino 272 3384 0 1984 96 1 95 95 0 8 0 nchpl 144 6220 0 4621 60 0 60 60 0 8 0 uvmvnodes 72 3803 0 0 70 0 70 70 0 8 0 vnodes 208 3803 0 0 201 0 201 201 0 8 0 namei 1024 17404 0 17404 6 5 1 1 0 8 1 percpumem 16 53 0 21 1 0 1 1 0 8 0 vcpupl 1984 11 0 0 2 0 2 2 0 8 0 vmpool 560 15 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 29 0 21 2 1 1 1 0 8 0 scsiplug 64 5 0 5 2 2 0 1 0 8 0 scxspl 192 17762 0 17762 16 15 1 7 0 8 1 plimitpl 152 107 0 99 1 0 1 1 0 8 0 sigapl 424 1767 0 1714 6 0 6 6 0 8 0 futexpl 56 25816 0 25814 6 5 1 1 0 8 0 knotepl 112 177 0 158 2 1 1 2 0 8 0 kqueuepl 144 177 0 172 1 0 1 1 0 8 0 pipepl 304 272 0 262 6 5 1 2 0 8 0 fdescpl 496 1731 0 1714 3 0 3 3 0 8 0 filepl 152 11233 0 11132 7 2 5 5 0 8 0 lockfpl 104 352 0 351 1 0 1 1 0 8 0 lockfspl 48 104 0 103 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 42 0 31 1 0 1 1 0 8 0 ucredpl 96 885 0 876 1 0 1 1 0 8 0 zombiepl 144 1714 0 1714 5 4 1 1 0 8 1 processpl 992 1767 0 1714 8 1 7 7 0 8 0 procpl 624 5050 0 4986 9 3 6 6 0 8 1 sosppl 128 19 0 19 6 6 0 1 0 8 0 sockpl 400 3380 0 3360 13 10 3 4 0 8 1 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 20 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 258 0 0 32 1 31 32 0 8 0 mtagpl 96 97 0 0 3 0 3 3 0 8 0 mbufpl 256 768 0 0 43 0 43 43 0 8 0 bufpl 280 6455 0 220 446 0 446 446 0 8 0 anonpl 16 173538 0 155032 121 44 77 91 0 124 0 amapchunkpl 152 10674 0 10496 33 24 9 21 0 158 0 amappl16 192 7183 0 6186 77 27 50 62 0 8 0 amappl15 184 728 0 725 2 1 1 1 0 8 0 amappl14 176 22 0 19 1 0 1 1 0 8 0 amappl13 168 800 0 795 1 0 1 1 0 8 0 amappl12 160 776 0 773 2 1 1 1 0 8 0 amappl11 152 54 0 39 1 0 1 1 0 8 0 amappl10 144 19 0 13 1 0 1 1 0 8 0 amappl9 136 384 0 383 1 0 1 1 0 8 0 amappl8 128 392 0 349 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 24 0 19 1 0 1 1 0 8 0 amappl5 104 1651 0 1632 1 0 1 1 0 8 0 amappl4 96 508 0 481 1 0 1 1 0 8 0 amappl3 88 157 0 152 1 0 1 1 0 8 0 amappl2 80 14528 0 14447 2 0 2 2 0 8 0 amappl1 72 61063 0 60599 24 14 10 18 0 8 0 amappl 80 5300 0 5246 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 82 0 35 1 0 1 1 0 8 0 uaddrrnd 24 1746 0 1718 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1746 0 1718 1 0 1 1 0 8 0 vmmpekpl 168 16500 0 16458 5 2 3 3 0 8 0 vmmpepl 168 229185 0 226849 164 61 103 122 0 357 0 vmsppl 368 1745 0 1718 3 0 3 3 0 8 0 pdppl 4096 3499 0 3447 8 1 7 7 0 8 0 pvpl 32 523344 0 502204 283 100 183 211 0 265 9 pmappl 232 1745 0 1718 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 343 0 38 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d00,ffff800023f124f8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 spec_read(ffff800023f12340) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ed44418,ffff800023f124f8,10,fffffd807f7bfae0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067bf0150,ffff800023f124f8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e09768,f0,ffff800023f124f8,0,ffff800023f125e0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e09768,ffff800023f12590,ffff800023f125e0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f12660) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f12660) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738ddf59070, 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 __mp_lock(ffffffff828e6860) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828e6860) at __mp_lock+0x139 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff828e6860,1) at __mp_acquire_count+0x51 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x392 sys/kern/sched_bsd.c:435 sleep_finish(ffff800023104180,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800023104180,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800023104180,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff827c4174,120,ffffffff823f6751,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e0aae8,ffff8000231042b0,ffff800023104300) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800023104380) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023104380) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff2ca0, count: -12