uvm_fault(0xffffffff828b8cf0, 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(0xffffffff828b8cf0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023f865d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 end trace frame: 0xffff800023f86410, count: 0 ddb{0}> trace tun_dev_read(5d00,ffff800023f865d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 spec_read(ffff800023f86420) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807394f1a8,ffff800023f865d8,10,fffffd807f7bf840) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806ca21730,ffff800023f865d8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e0a608,f0,ffff800023f865d8,0,ffff800023f866c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e0a608,ffff800023f86670,ffff800023f866c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f86740) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f86740) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc70858e60, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f86360 rbx 0xfffffd0000000000 rdx 0x486 rcx 0xffff800000ad9d40 rax 0xffffffff81d6c6e3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x7d5c9f120c2acab4 r11 0xc7fba5238ad3a50f r12 0 r13 0x3da r14 0xffff800000afa678 r15 0xffff800023f865d8 rip 0xffffffff81d6c6e8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f86300 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.0) pid=86706 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020e094f8,0xffffffff82928bc8 process=0xffff800021edcfa8 user=0xffff800023f81000, vmspace=0xfffffd8064e83b90 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62380 396151 78634 0 2 0 syz-executor.0 *62380 86706 78634 0 7 0x4000000 syz-executor.0 83609 405083 53868 0 2 0x2 syz-executor.1 72120 156183 0 0 3 0x14280 nfsidl nfsio 51239 416944 0 0 3 0x14280 nfsidl nfsio 85805 225854 0 0 3 0x14280 nfsidl nfsio 64467 404731 0 0 3 0x14280 nfsidl nfsio 81167 122823 0 0 3 0x14280 nfsidl nfsio 64660 383706 0 0 3 0x14280 nfsidl nfsio 86244 187057 0 0 3 0x14280 nfsidl nfsio 76674 73134 0 0 3 0x14280 nfsidl nfsio 28840 109260 0 0 3 0x14280 nfsidl nfsio 57030 49291 0 0 3 0x14280 nfsidl nfsio 55043 428523 0 0 3 0x14280 nfsidl nfsio 6795 221536 0 0 3 0x14280 nfsidl nfsio 60578 371157 0 0 3 0x14280 nfsidl nfsio 93773 469869 0 0 3 0x14280 nfsidl nfsio 44351 431927 0 0 3 0x14280 nfsidl nfsio 88873 439792 0 0 3 0x14280 nfsidl nfsio 70867 381382 0 0 3 0x14280 nfsidl nfsio 22924 325797 0 0 3 0x14280 nfsidl nfsio 3440 431532 0 0 3 0x14280 nfsidl nfsio 98912 33671 0 0 3 0x14280 nfsidl nfsio 78634 362853 53868 0 3 0x82 nanosleep syz-executor.0 6663 165739 0 0 3 0x14200 bored sosplice 93334 366938 1 0 3 0x100083 ttyin getty 53868 7169 54235 0 3 0x82 thrsleep syz-fuzzer 53868 362542 54235 0 7 0x4000482 syz-fuzzer 53868 101003 54235 0 3 0x4000082 thrsleep syz-fuzzer 53868 41246 54235 0 3 0x4000082 thrsleep syz-fuzzer 53868 30909 54235 0 3 0x4000082 nanosleep syz-fuzzer 53868 414241 54235 0 3 0x4000082 kqread syz-fuzzer 53868 104242 54235 0 3 0x4000082 thrsleep syz-fuzzer 53868 219570 54235 0 3 0x4000082 thrsleep syz-fuzzer 53868 3549 54235 0 3 0x4000082 thrsleep syz-fuzzer 53868 484089 54235 0 3 0x4000082 thrsleep syz-fuzzer 54235 388273 63475 0 3 0x10008a pause ksh 63475 342766 48237 0 3 0x92 select sshd 48237 385968 1 0 3 0x80 select sshd 70536 338502 38374 74 3 0x100092 bpf pflogd 38374 87214 1 0 3 0x80 netio pflogd 18131 501787 72186 73 3 0x100090 kqread syslogd 72186 469538 1 0 3 0x100082 netio syslogd 6022 402536 1 77 3 0x100090 poll dhclient 60892 17644 1 0 3 0x80 poll dhclient 43677 360046 0 0 3 0x14200 bored smr 66905 377512 0 0 3 0x14200 pgzero zerothread 9432 192797 0 0 3 0x14200 aiodoned aiodoned 67240 186520 0 0 3 0x14200 syncer update 62439 1727 0 0 3 0x14200 cleaner cleaner 60341 214045 0 0 3 0x14200 reaper reaper 44318 167460 0 0 3 0x14200 pgdaemon pagedaemon 83795 488692 0 0 3 0x14200 bored crynlk 32867 448363 0 0 3 0x14200 bored crypto 13527 15869 0 0 3 0x40014200 acpi0 acpi0 28020 131029 0 0 3 0x40014200 idle1 96674 429807 0 0 3 0x14200 bored softnet 76024 415258 0 0 3 0x14200 bored systqmp 16999 177697 0 0 3 0x14200 bored systq 36768 164119 0 0 3 0x40014200 bored softclock 58343 496078 0 0 3 0x40014200 idle0 1 411520 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 62380 (syz-executor.0) thread 0xffff800020e0a608 (86706) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8292f068) #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 Process 83609 (syz-executor.1) thread 0xffff800020e0a398 (405083) exclusive rrwlock inode r = 0 (0xfffffd806e2893c8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1e2 sys/ufs/ffs/ffs_alloc.c:394 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806435dd60) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9521 6431K 6880K 78643K 11680 0 pcb 13 8K 8K 78643K 143 0 rtable 111 4K 9K 78643K 600 0 ifaddr 72 14K 16K 78643K 190 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 73 0 ioctlops 0 0K 4K 78643K 1656 0 iov 0 0K 16K 78643K 51 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1630 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 97 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 792 0 proc 61 63K 95K 78643K 630 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 50 0 in_multi 52 3K 3K 78643K 195 0 ether_multi 1 0K 0K 78643K 8 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 288 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 136 88K 104K 78643K 3506 0 UVM aobj 47 7K 7K 78643K 53 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 56 0 NDP 12 0K 0K 78643K 50 0 temp 111 3861K 3932K 78643K 23194 0 kqueue 3 4K 12K 78643K 31 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 14 0 8 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 112 136 0 92 2 0 2 2 0 8 0 unpcb 120 408 0 398 1 0 1 1 0 8 0 syncache 264 12 0 12 4 4 0 1 0 8 0 tcpqe 32 109 0 109 1 1 0 1 0 8 0 tcpcb 544 200 0 188 3 2 1 2 0 8 0 inpcb 296 1012 0 1005 21 19 2 2 0 8 1 nd6 48 40 0 34 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pffrag 232 4 0 4 3 3 0 1 0 482 0 pffrnode 88 4 0 4 3 3 0 1 0 8 0 pffrent 40 98 0 98 4 4 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 pfrktable 1344 23 0 23 1 1 0 1 0 8 0 pfstitem 24 12 0 10 1 0 1 1 0 8 0 pfstkey 112 12 0 10 1 0 1 1 0 8 0 pfstate 328 12 0 10 1 0 1 1 0 8 0 pfrule 1360 35 0 34 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 477 0 272 17 4 13 14 0 8 0 art_table 32 478 0 272 2 0 2 2 0 8 0 art_node 16 135 0 95 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 16 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 95 0 85 1 0 1 1 0 8 0 shmpl 112 50 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 2387 0 980 89 0 89 89 0 8 0 ffsino 272 2387 0 980 95 0 95 95 0 8 0 nchpl 144 3605 0 2009 60 0 60 60 0 8 0 uvmvnodes 72 2717 0 0 50 0 50 50 0 8 0 vnodes 208 2717 0 0 143 0 143 143 0 8 0 namei 1024 11693 0 11692 16 15 1 1 0 8 0 percpumem 16 47 0 15 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 9 0 2 2 1 1 1 0 8 0 pfiaddrpl 120 10 0 10 1 1 0 1 0 8 0 scxspl 192 13393 0 13393 19 18 1 7 0 8 1 plimitpl 152 68 0 60 1 0 1 1 0 8 0 sigapl 424 1031 0 979 8 1 7 8 0 8 0 futexpl 56 10135 0 10135 20 19 1 1 0 8 1 knotepl 112 126 0 107 1 0 1 1 0 8 0 kqueuepl 144 71 0 68 1 0 1 1 0 8 0 pipepl 304 187 0 177 6 5 1 2 0 8 0 fdescpl 496 985 0 969 3 0 3 3 0 8 0 filepl 152 6335 0 6235 7 2 5 6 0 8 1 lockfpl 104 120 0 119 1 0 1 1 0 8 0 lockfspl 48 45 0 44 1 0 1 1 0 8 0 sessionpl 112 23 0 12 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 1705 0 1696 1 0 1 1 0 8 0 zombiepl 144 979 0 979 1 0 1 1 0 8 1 processpl 992 1031 0 979 8 0 8 8 0 8 0 procpl 624 2584 0 2522 6 0 6 6 0 8 0 sosppl 128 7 0 7 3 3 0 1 0 8 0 sockpl 400 1487 0 1468 20 17 3 5 0 8 1 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 32 0 0 4 2 2 3 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 229 0 0 23 6 17 23 0 8 0 mtagpl 96 29 0 0 1 0 1 1 0 8 0 mbufpl 256 542 0 0 16 0 16 16 0 8 0 bufpl 280 7357 0 1122 446 0 446 446 0 8 0 anonpl 16 120099 0 102933 89 19 70 85 0 124 0 amapchunkpl 152 6807 0 6628 39 31 8 21 0 158 0 amappl16 192 4384 0 3483 59 13 46 57 0 8 0 amappl15 184 566 0 562 1 0 1 1 0 8 0 amappl14 176 123 0 120 1 0 1 1 0 8 0 amappl13 168 50 0 47 1 0 1 1 0 8 0 amappl12 160 4 0 3 1 0 1 1 0 8 0 amappl11 152 167 0 152 1 0 1 1 0 8 0 amappl10 144 202 0 196 1 0 1 1 0 8 0 amappl9 136 386 0 385 1 0 1 1 0 8 0 amappl8 128 436 0 398 2 0 2 2 0 8 0 amappl7 120 330 0 317 1 0 1 1 0 8 0 amappl6 112 129 0 124 1 0 1 1 0 8 0 amappl5 104 828 0 808 1 0 1 1 0 8 0 amappl4 96 713 0 682 1 0 1 1 0 8 0 amappl3 88 129 0 124 1 0 1 1 0 8 0 amappl2 80 7112 0 7040 2 0 2 2 0 8 0 amappl1 72 38202 0 37756 23 13 10 18 0 8 0 amappl 80 2876 0 2823 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 52 0 6 1 0 1 1 0 8 0 uaddrrnd 24 994 0 971 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 994 0 971 1 0 1 1 0 8 0 vmmpekpl 168 12495 0 12447 3 0 3 3 0 8 0 vmmpepl 168 134389 0 132294 238 140 98 132 0 357 1 vmsppl 368 993 0 971 3 0 3 3 0 8 0 pdppl 4096 1995 0 1949 7 0 7 7 0 8 0 pvpl 32 360256 0 339884 240 73 167 207 0 265 0 pmappl 232 993 0 971 6 4 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 313 0 50 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d00,ffff800023f865d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:787 spec_read(ffff800023f86420) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807394f1a8,ffff800023f865d8,10,fffffd807f7bf840) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806ca21730,ffff800023f865d8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e0a608,f0,ffff800023f865d8,0,ffff800023f866c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e0a608,ffff800023f86670,ffff800023f866c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f86740) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f86740) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc70858e60, 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(ffffffff8292ee60) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8292ee60) at __mp_lock+0x127 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff8292ee60,1) 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(ffff800020e7c2b0,1) at sleep_finish+0x113 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800020e7c2b0,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800020e7c2b0,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff8288dc04,120,ffffffff823f65d7,2) at tsleep+0x1cc sys/kern/kern_synch.c:155 sys_nanosleep(ffff800020e3f010,ffff800020e7c3e0,ffff800020e7c430) at sys_nanosleep+0x205 sys/kern/kern_time.c:297 syscall(ffff800020e7c4b0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e7c4b0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc000051f38, count: -12