uvm_fault(0xffffffff82642460, 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(0xffffffff82642460, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023f9da18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023f9d850, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff800023f9da18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f9d860) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e307348,ffff800023f9da18,10,fffffd807f7bf960) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066f99578,ffff800023f9da18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e93128,f0,ffff800023f9da18,0,ffff800023f9db00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e93128,ffff800023f9dab0,ffff800023f9db00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f9db80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f9db80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ba6613f980, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f9d7a0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff8000009d7680 rax 0xffffffff81834383 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x4231a09755b8eea6 r11 0xc5db0c9289ef0ce2 r12 0 r13 0x3da r14 0xffff800000a23e60 r15 0xffff800023f9da18 rip 0xffffffff81834388 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f9d740 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=371952 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff800020e924f8,0xffffffff82684480 process=0xffff800020ec67d8 user=0xffff800023f98000, vmspace=0xfffffd807efff5c0 estcpu=24, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15809 382754 2894 0 2 0 syz-executor.1 *15809 371952 2894 0 7 0x4000000 syz-executor.1 46098 262920 0 0 3 0x14200 bored sosplice 2894 336892 79044 0 3 0x82 nanosleep syz-executor.1 22253 43228 79044 0 2 0x2 syz-executor.0 79044 158547 28124 0 3 0x82 thrsleep syz-fuzzer 79044 140527 28124 0 3 0x4000082 nanosleep syz-fuzzer 79044 23319 28124 0 3 0x4000082 thrsleep syz-fuzzer 79044 406214 28124 0 3 0x4000082 kqread syz-fuzzer 79044 360049 28124 0 3 0x4000082 thrsleep syz-fuzzer 79044 107560 28124 0 3 0x4000082 thrsleep syz-fuzzer 79044 440046 28124 0 3 0x4000082 thrsleep syz-fuzzer 79044 473087 28124 0 3 0x4000082 thrsleep syz-fuzzer 79044 409685 28124 0 2 0x4000482 syz-fuzzer 79044 198664 28124 0 3 0x4000082 thrsleep syz-fuzzer 28124 202360 93950 0 3 0x10008a pause ksh 93950 176982 35979 0 3 0x92 select sshd 63505 44442 1 0 3 0x100083 ttyin getty 35979 472509 1 0 3 0x80 select sshd 25968 446528 47055 74 3 0x100092 bpf pflogd 47055 418362 1 0 3 0x80 netio pflogd 21168 247895 83625 73 3 0x100090 kqread syslogd 83625 308894 1 0 3 0x100082 netio syslogd 2484 172884 1 77 3 0x100090 poll dhclient 88630 57134 1 0 3 0x80 poll dhclient 78821 320703 0 0 3 0x14200 bored smr 67350 268835 0 0 2 0x14200 zerothread 28871 523813 0 0 3 0x14200 aiodoned aiodoned 77116 469871 0 0 3 0x14200 syncer update 32263 73874 0 0 3 0x14200 cleaner cleaner 15145 157856 0 0 3 0x14200 reaper reaper 77111 72570 0 0 3 0x14200 pgdaemon pagedaemon 94179 366495 0 0 3 0x14200 bored crynlk 87519 3889 0 0 3 0x14200 bored crypto 25248 152463 0 0 3 0x40014200 acpi0 acpi0 61375 335934 0 0 7 0x40014200 idle1 20247 243714 0 0 3 0x14200 bored softnet 70304 79098 0 0 3 0x14200 bored systqmp 80912 459204 0 0 3 0x14200 bored systq 49615 119825 0 0 3 0x40014200 bored softclock 97494 328907 0 0 3 0x40014200 idle0 1 96544 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 15809 (syz-executor.1) thread 0xffff800020e93128 (371952) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82658948) #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 22253 (syz-executor.0) thread 0xffff800020e6c008 (43228) exclusive rrwlock inode r = 0 (0xfffffd8068e5c700) #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 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068e5c810) #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 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #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 9499 6423K 6803K 78643K 10929 0 pcb 14 8K 8K 78643K 87 0 rtable 95 3K 3K 78643K 283 0 ifaddr 70 15K 15K 78643K 119 0 counters 43 33K 34K 78643K 61 0 ioctlops 0 0K 4K 78643K 1482 0 iov 0 0K 12K 78643K 22 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1329 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 26 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 205 0 sigio 0 0K 0K 78643K 1 0 proc 62 63K 83K 78643K 457 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 19 0 in_multi 78 3K 3K 78643K 100 0 ether_multi 1 0K 0K 78643K 5 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 224 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 110 22K 38K 78643K 1432 0 UVM aobj 22 2K 2K 78643K 22 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 9 0K 0K 78643K 23 0 temp 80 3036K 3100K 78643K 6058 0 kqueue 3 4K 8K 78643K 10 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 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 210 0 205 1 0 1 1 0 8 0 rtentry 112 54 0 15 2 0 2 2 0 8 0 unpcb 120 181 0 171 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 710 0 710 2 2 0 1 0 8 0 tcpcb 544 89 0 84 1 0 1 1 0 8 0 inpcb 280 315 0 306 1 0 1 1 0 8 0 nd6 48 8 0 3 1 0 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 pfstitem 24 27 0 7 1 0 1 1 0 8 0 pfstkey 112 27 0 7 1 0 1 1 0 8 0 pfstate 328 27 0 7 2 0 2 2 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 256 255 0 46 14 0 14 14 0 8 0 art_table 32 257 0 46 2 0 2 2 0 8 0 art_node 16 53 0 17 1 0 1 1 0 8 0 semupl 112 4 0 4 1 0 1 1 0 8 1 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 20 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1685 0 283 89 0 89 89 0 8 0 ffsino 272 1685 0 283 95 1 94 94 0 8 0 nchpl 144 2138 0 531 60 0 60 60 0 8 0 uvmvnodes 72 1795 0 0 33 0 33 33 0 8 0 vnodes 208 1795 0 0 95 0 95 95 0 8 0 namei 1024 5856 0 5856 2 1 1 1 0 8 1 percpumem 16 41 0 9 1 0 1 1 0 8 0 vmpool 560 6 0 6 1 1 0 1 0 8 0 scxspl 192 6126 0 6126 9 7 2 7 0 8 2 plimitpl 152 26 0 18 1 0 1 1 0 8 0 sigapl 424 421 0 389 4 0 4 4 0 8 0 futexpl 56 3837 0 3837 1 0 1 1 0 8 1 knotepl 112 69 0 50 1 0 1 1 0 8 0 kqueuepl 144 40 0 37 1 0 1 1 0 8 0 pipelkpl 48 95 0 85 1 0 1 1 0 8 0 pipepl 120 190 0 171 1 0 1 1 0 8 0 fdescpl 496 405 0 389 3 0 3 3 0 8 0 filepl 152 2531 0 2426 6 1 5 5 0 8 0 lockfpl 104 51 0 50 1 0 1 1 0 8 0 lockfspl 48 16 0 15 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 296 0 287 1 0 1 1 0 8 0 zombiepl 144 389 0 389 2 1 1 1 0 8 1 processpl 984 421 0 389 6 1 5 5 0 8 0 procpl 624 660 0 618 4 0 4 4 0 8 0 sosppl 128 7 0 7 1 1 0 1 0 8 0 sockpl 400 706 0 682 5 1 4 4 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 206 0 0 25 0 25 25 0 8 0 mtagpl 80 16 0 0 1 0 1 1 0 8 0 mbufpl 256 243 0 0 15 0 15 15 0 8 0 bufpl 280 3904 0 135 270 0 270 270 0 8 0 anonpl 16 50830 0 36101 63 2 61 61 0 124 0 amapchunkpl 152 1660 0 1533 12 5 7 11 0 158 0 amappl16 192 1793 0 994 42 0 42 42 0 8 1 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 25 0 21 1 0 1 1 0 8 0 amappl13 168 32 0 28 1 0 1 1 0 8 0 amappl12 160 8 0 6 2 1 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 19 0 14 1 0 1 1 0 8 0 amappl9 136 473 0 470 1 0 1 1 0 8 0 amappl8 128 451 0 418 2 0 2 2 0 8 0 amappl7 120 124 0 112 1 0 1 1 0 8 0 amappl6 112 32 0 26 1 0 1 1 0 8 0 amappl5 104 303 0 288 1 0 1 1 0 8 0 amappl4 96 503 0 469 1 0 1 1 0 8 0 amappl3 88 105 0 100 1 0 1 1 0 8 0 amappl2 80 2293 0 2222 2 0 2 2 0 8 0 amappl1 72 18193 0 17749 23 13 10 18 0 8 0 amappl 80 914 0 874 1 0 1 1 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 21 0 0 1 0 1 1 0 8 0 uaddrrnd 24 411 0 395 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 411 0 395 1 0 1 1 0 8 0 vmmpekpl 168 6738 0 6709 2 0 2 2 0 8 0 vmmpepl 168 54945 0 52993 114 22 92 107 0 357 7 vmsppl 368 410 0 395 2 0 2 2 0 8 0 pdppl 4096 830 0 790 6 0 6 6 0 8 0 pvpl 32 171446 0 153582 154 2 152 152 0 265 7 pmappl 232 410 0 395 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 271 0 6 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff800023f9da18,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f9d860) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e307348,ffff800023f9da18,10,fffffd807f7bf960) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066f99578,ffff800023f9da18,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e93128,f0,ffff800023f9da18,0,ffff800023f9db00) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e93128,ffff800023f9dab0,ffff800023f9db00) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f9db80) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f9db80) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ba6613f980, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020e00ff0) 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 acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffff800020e00ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -5