uvm_fault(0xffffffff8259b360, 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(0xffffffff8259b360, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800021f81278,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f810b0, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800021f81278,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f810c0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3284e8,ffff800021f81278,10,fffffd807f7bf720) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806885e7d0,ffff800021f81278,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7398,f0,ffff800021f81278,0,ffff800021f81360) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7398,ffff800021f81310,ffff800021f81360) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f813e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f813e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f34bfba510, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f81000 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000a1d500 rax 0xffffffff82047c13 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x8a432e53de30bf39 r11 0x7ff20b4f46765f3f r12 0 r13 0x3da r14 0xffff8000009d6660 r15 0xffff800021f81278 rip 0xffffffff82047c18 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f80fa0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=236785 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec69d8,0xffffffff8267b4d8 process=0xffff800020e927d0 user=0xffff800021f7c000, vmspace=0xfffffd8068d41180 estcpu=27, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89945 210951 32972 0 7 0 syz-executor.0 *89945 236785 32972 0 7 0x4000000 syz-executor.0 84856 104724 27257 0 3 0x2 biowait syz-executor.1 99447 410261 0 0 3 0x14200 bored sosplice 32972 77084 27257 0 3 0x82 nanosleep syz-executor.0 27257 167286 51240 0 3 0x82 thrsleep syz-fuzzer 27257 63778 51240 0 3 0x4000082 nanosleep syz-fuzzer 27257 177279 51240 0 3 0x4000082 kqread syz-fuzzer 27257 83005 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 342633 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 189887 51240 0 3 0x4000082 nanosleep syz-fuzzer 27257 195328 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 193487 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 143384 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 25183 51240 0 3 0x4000082 thrsleep syz-fuzzer 27257 333439 51240 0 3 0x4000082 thrsleep syz-fuzzer 51240 358642 35525 0 3 0x10008a pause ksh 35525 414407 35184 0 3 0x92 select sshd 32229 110571 1 0 3 0x100083 ttyin getty 35184 226981 1 0 3 0x80 select sshd 7047 402440 32018 74 3 0x100092 bpf pflogd 32018 244524 1 0 3 0x80 netio pflogd 68615 312434 843 73 3 0x100090 kqread syslogd 843 98676 1 0 3 0x100082 netio syslogd 63495 22489 1 77 3 0x100090 poll dhclient 82357 87514 1 0 3 0x80 poll dhclient 54353 192536 0 0 3 0x14200 bored smr 16040 13026 0 0 3 0x14200 pgzero zerothread 24620 160036 0 0 3 0x14200 aiodoned aiodoned 99918 234084 0 0 3 0x14200 syncer update 86891 47645 0 0 3 0x14200 cleaner cleaner 34137 488292 0 0 3 0x14200 reaper reaper 72953 121226 0 0 3 0x14200 pgdaemon pagedaemon 76121 362596 0 0 3 0x14200 bored crynlk 28013 35005 0 0 3 0x14200 bored crypto 30027 435051 0 0 3 0x40014200 acpi0 acpi0 14417 85079 0 0 3 0x40014200 idle1 31559 146253 0 0 3 0x14200 bored softnet 85170 232833 0 0 3 0x14200 bored systqmp 63210 12511 0 0 3 0x14200 bored systq 32889 45722 0 0 3 0x40014200 bored softclock 39870 69773 0 0 3 0x40014200 idle0 1 386467 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 89945 (syz-executor.0) thread 0xffff800020ec7398 (236785) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82695610) #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 84856 (syz-executor.1) thread 0xffff800020ec7ae8 (104724) exclusive rrwlock inode r = 0 (0xfffffd806ea625f8) #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+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #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 (0xfffffd806e325918) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9539 6424K 6941K 78643K 11522 0 pcb 13 8K 8K 78643K 165 0 rtable 108 12K 12K 78643K 412 0 ifaddr 84 15K 16K 78643K 166 0 counters 43 33K 34K 78643K 65 0 ioctlops 0 0K 4K 78643K 1530 0 iov 0 0K 32K 78643K 110 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1542 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 21 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 727 0 sigio 0 0K 0K 78643K 4 0 proc 62 63K 95K 78643K 599 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 62 0 in_multi 57 3K 3K 78643K 175 0 ether_multi 1 0K 0K 78643K 29 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 290 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 156 138K 138K 78643K 3914 0 UVM aobj 31 4K 4K 78643K 39 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 17 0K 0K 78643K 37 0 temp 144 3051K 3119K 78643K 39597 0 kqueue 9 16K 20K 78643K 28 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 73 0 71 1 0 1 1 0 8 0 rtentry 112 81 0 40 2 0 2 2 0 8 0 unpcb 120 497 0 487 1 0 1 1 0 8 0 syncache 264 12 0 12 3 3 0 1 0 8 0 tcpqe 32 74 0 74 3 3 0 1 0 8 0 tcpcb 544 330 0 326 1 0 1 1 0 8 0 inpcb 280 856 0 849 5 4 1 2 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 15 0 11 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 3 0 3 2 2 0 1 0 8 0 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 8 0 8 2 2 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 pfstitem 24 50 0 32 1 0 1 1 0 8 0 pfstkey 112 50 0 32 1 0 1 1 0 8 0 pfstate 328 50 0 32 4 1 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 366 0 191 14 1 13 13 0 8 2 art_table 32 367 0 191 2 0 2 2 0 8 0 art_node 16 80 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 24 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 37 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2624 0 1220 89 0 89 89 0 8 0 ffsino 272 2624 0 1220 95 0 95 95 0 8 0 nchpl 144 3983 0 2389 60 0 60 60 0 8 0 uvmvnodes 72 2906 0 0 53 0 53 53 0 8 0 vnodes 208 2906 0 0 153 0 153 153 0 8 0 namei 1024 11765 0 11764 2 1 1 1 0 8 0 percpumem 16 43 0 11 1 0 1 1 0 8 0 vcpupl 1984 11 0 1 2 0 2 2 0 8 0 vmpool 560 14 0 4 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 11091 0 11090 10 9 1 7 0 8 0 plimitpl 152 49 0 41 1 0 1 1 0 8 0 sigapl 424 937 0 905 4 0 4 4 0 8 0 futexpl 56 11774 0 11774 3 2 1 1 0 8 1 knotepl 112 118 0 99 1 0 1 1 0 8 0 kqueuepl 144 172 0 163 1 0 1 1 0 8 0 pipelkpl 48 177 0 167 1 0 1 1 0 8 0 pipepl 120 354 0 335 1 0 1 1 0 8 0 fdescpl 496 921 0 905 3 0 3 3 0 8 0 filepl 152 6289 0 6189 7 2 5 6 0 8 1 lockfpl 104 178 0 177 1 0 1 1 0 8 0 lockfspl 48 69 0 68 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 492 0 483 1 0 1 1 0 8 0 zombiepl 144 905 0 905 1 0 1 1 0 8 1 processpl 984 937 0 905 5 0 5 5 0 8 0 procpl 624 2419 0 2376 5 1 4 5 0 8 0 sosppl 128 13 0 13 3 3 0 1 0 8 0 sockpl 400 1432 0 1413 6 3 3 4 0 8 1 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 154 0 0 19 0 19 19 0 8 0 mtagpl 80 38 0 0 1 0 1 1 0 8 0 mbufpl 256 225 0 0 13 0 13 13 0 8 0 bufpl 280 4958 0 135 345 0 345 345 0 8 0 anonpl 16 93412 0 82536 87 16 71 71 0 124 12 amapchunkpl 152 6518 0 6370 18 11 7 13 0 158 0 amappl16 192 3885 0 3133 51 5 46 49 0 8 8 amappl15 184 325 0 322 1 0 1 1 0 8 0 amappl14 176 27 0 20 1 0 1 1 0 8 0 amappl13 168 37 0 36 1 0 1 1 0 8 0 amappl12 160 339 0 333 1 0 1 1 0 8 0 amappl11 152 216 0 200 1 0 1 1 0 8 0 amappl10 144 20 0 16 1 0 1 1 0 8 0 amappl9 136 385 0 384 1 0 1 1 0 8 0 amappl8 128 432 0 388 2 0 2 2 0 8 0 amappl7 120 147 0 132 1 0 1 1 0 8 0 amappl6 112 29 0 25 1 0 1 1 0 8 0 amappl5 104 809 0 791 1 0 1 1 0 8 0 amappl4 96 533 0 503 1 0 1 1 0 8 0 amappl3 88 125 0 120 1 0 1 1 0 8 0 amappl2 80 6552 0 6481 2 0 2 2 0 8 0 amappl1 72 29934 0 29492 23 12 11 18 0 8 0 amappl 80 3271 0 3216 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 38 0 8 1 0 1 1 0 8 0 uaddrrnd 24 935 0 909 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 935 0 909 1 0 1 1 0 8 0 vmmpekpl 168 10786 0 10753 2 0 2 2 0 8 0 vmmpepl 168 118910 0 116961 153 38 115 115 0 357 24 vmsppl 368 934 0 909 3 0 3 3 0 8 0 pdppl 4096 1878 0 1828 8 1 7 7 0 8 0 pvpl 32 293695 0 279658 198 22 176 176 0 265 30 pmappl 232 934 0 909 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 269 0 10 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(ffffffff824abff0) 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(ffffffff82695408) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82695408) at __mp_lock+0x127 sys/kern/kern_lock.c:147 intr_handler(ffff80002318f3b0,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:525 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f end of kernel end trace frame: 0x7f7ffffe1780, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff800021f81278,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f810c0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3284e8,ffff800021f81278,10,fffffd807f7bf720) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806885e7d0,ffff800021f81278,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec7398,f0,ffff800021f81278,0,ffff800021f81360) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec7398,ffff800021f81310,ffff800021f81360) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f813e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f813e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f34bfba510, count: -8