uvm_fault(0xffffffff82598ca0, 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(0xffffffff82598ca0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800021f91948,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800021f91780, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800021f91948,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f91790) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e380348,ffff800021f91948,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067df4998,ffff800021f91948,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed69d8,f0,ffff800021f91948,0,ffff800021f91a30) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed69d8,ffff800021f919e0,ffff800021f91a30) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f91ab0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f91ab0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xafadb8ce2d0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800021f916d0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff8000009d85c0 rax 0xffffffff81a9f1b3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xbdd51a055e211d44 r11 0xc4f4551aa32919ca r12 0 r13 0x3da r14 0xffff800000a29660 r15 0xffff800021f91948 rip 0xffffffff81a9f1b8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021f91670 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=406185 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed6c48,0xffffffff8264acd0 process=0xffff800020e93b08 user=0xffff800021f8c000, vmspace=0xfffffd807efff450 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29342 125242 50750 0 7 0 syz-executor.1 *29342 406185 50750 0 7 0x4000000 syz-executor.1 37704 514644 84643 0 3 0x80 nanosleep syz-executor.0 37704 165844 84643 0 3 0x4000080 netcon syz-executor.0 37704 364244 84643 0 3 0x4000080 fsleep syz-executor.0 40882 172422 0 0 3 0x14200 bored sosplice 50750 277800 41751 0 3 0x82 nanosleep syz-executor.1 84643 353737 41751 0 3 0x82 nanosleep syz-executor.0 41751 253606 69190 0 3 0x82 thrsleep syz-fuzzer 41751 524232 69190 0 3 0x4000082 nanosleep syz-fuzzer 41751 93325 69190 0 3 0x4000082 thrsleep syz-fuzzer 41751 496272 69190 0 3 0x4000082 kqread syz-fuzzer 41751 518949 69190 0 3 0x4000082 thrsleep syz-fuzzer 41751 202442 69190 0 3 0x4000082 thrsleep syz-fuzzer 41751 390987 69190 0 3 0x4000082 thrsleep syz-fuzzer 41751 428010 69190 0 3 0x4000082 thrsleep syz-fuzzer 41751 242833 69190 0 3 0x4000082 nanosleep syz-fuzzer 41751 119542 69190 0 3 0x4000082 thrsleep syz-fuzzer 69190 487299 95076 0 3 0x10008a pause ksh 95076 273516 65821 0 3 0x92 select sshd 85557 282446 1 0 3 0x100083 ttyin getty 65821 263882 1 0 3 0x80 select sshd 31372 352299 73808 74 3 0x100092 bpf pflogd 73808 290718 1 0 3 0x80 netio pflogd 2693 467771 75808 73 3 0x100090 kqread syslogd 75808 212360 1 0 3 0x100082 netio syslogd 97755 374021 1 77 3 0x100090 poll dhclient 44520 46654 1 0 3 0x80 poll dhclient 17553 171688 0 0 3 0x14200 bored smr 73622 280648 0 0 3 0x14200 pgzero zerothread 57438 452341 0 0 3 0x14200 aiodoned aiodoned 92326 332690 0 0 3 0x14200 syncer update 62137 85334 0 0 3 0x14200 cleaner cleaner 80539 252184 0 0 3 0x14200 reaper reaper 28038 46043 0 0 3 0x14200 pgdaemon pagedaemon 36013 369898 0 0 3 0x14200 bored crynlk 65507 354428 0 0 3 0x14200 bored crypto 69729 460146 0 0 3 0x40014200 acpi0 acpi0 8172 400556 0 0 3 0x40014200 idle1 50986 49097 0 0 3 0x14200 bored softnet 941 519428 0 0 3 0x14200 bored systqmp 55995 534 0 0 3 0x14200 bored systq 47582 226251 0 0 3 0x40014200 bored softclock 17523 290697 0 0 3 0x40014200 idle0 1 519032 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 29342 (syz-executor.1) thread 0xffff800020ed69d8 (406185) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8264d2a8) #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 9499 6412K 6993K 78643K 11040 0 pcb 13 8K 8K 78643K 65 0 rtable 101 3K 3K 78643K 246 0 ifaddr 62 13K 13K 78643K 82 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1483 0 iov 0 0K 34K 78643K 56 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1342 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 11 1K 1K 78643K 16 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1823 197K 290K 78643K 12980 0 file desc 6 17K 25K 78643K 176 0 proc 59 63K 95K 78643K 445 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 45 0 in_multi 49 2K 3K 78643K 90 0 ether_multi 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 215 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 127 39K 39K 78643K 1536 0 UVM aobj 4 2K 2K 78643K 4 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 166 0 NDP 9 0K 0K 78643K 16 0 temp 92 3043K 3107K 78643K 2449 0 kqueue 3 4K 8K 78643K 17 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 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 54 0 12 2 0 2 2 0 8 0 unpcb 120 119 0 109 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 482 0 482 1 1 0 1 0 8 0 tcpcb 544 257 0 250 2 1 1 2 0 8 0 inpcb 280 409 0 396 2 0 2 2 0 8 1 nd6 48 9 0 4 1 0 1 1 0 8 0 pkpcb 40 8 0 8 1 1 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 26 0 5 1 0 1 1 0 8 0 pfstkey 112 26 0 5 1 0 1 1 0 8 0 pfstate 328 26 0 5 2 0 2 2 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 256 236 0 57 13 1 12 13 0 8 0 art_table 32 237 0 57 2 0 2 2 0 8 0 art_node 16 53 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semupl 112 5 0 5 2 1 1 1 0 8 1 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1609 0 204 89 1 88 89 0 8 0 ffsino 272 1609 0 204 94 0 94 94 0 8 0 nchpl 144 2029 0 420 60 0 60 60 0 8 0 uvmvnodes 72 1760 0 0 32 0 32 32 0 8 0 vnodes 208 1760 0 0 93 0 93 93 0 8 0 namei 1024 5457 0 5457 1 0 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 2 0 0 1 0 1 1 0 8 0 scxspl 192 5523 0 5523 9 6 3 6 0 8 3 plimitpl 152 32 0 24 1 0 1 1 0 8 0 sigapl 424 392 0 359 4 0 4 4 0 8 0 futexpl 56 2548 0 2547 1 0 1 1 0 8 0 knotepl 112 74 0 55 1 0 1 1 0 8 0 kqueuepl 144 28 0 26 1 0 1 1 0 8 0 pipelkpl 48 181 0 171 1 0 1 1 0 8 0 pipepl 120 362 0 343 1 0 1 1 0 8 0 fdescpl 496 376 0 359 3 0 3 3 0 8 0 filepl 152 2403 0 2296 6 1 5 6 0 8 0 lockfpl 104 49 0 48 1 0 1 1 0 8 0 lockfspl 48 22 0 21 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 96 173 0 164 1 0 1 1 0 8 0 zombiepl 144 359 0 359 1 0 1 1 0 8 1 processpl 984 392 0 359 5 0 5 5 0 8 0 procpl 624 767 0 722 4 0 4 4 0 8 0 sockpl 400 563 0 538 5 2 3 5 0 8 0 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 187 0 0 23 0 23 23 0 8 0 mtagpl 80 26 0 0 1 0 1 1 0 8 0 mbufpl 256 206 0 0 13 1 12 12 0 8 0 bufpl 280 3650 0 131 252 0 252 252 0 8 0 anonpl 16 46469 0 32718 57 1 56 56 0 124 0 amapchunkpl 152 2227 0 2090 21 1 20 20 0 158 13 amappl16 192 1419 0 687 37 0 37 37 0 8 0 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 89 0 83 1 0 1 1 0 8 0 amappl13 168 90 0 87 1 0 1 1 0 8 0 amappl12 160 12 0 8 2 1 1 1 0 8 0 amappl11 152 53 0 38 1 0 1 1 0 8 0 amappl10 144 22 0 14 1 0 1 1 0 8 0 amappl9 136 462 0 459 1 0 1 1 0 8 0 amappl8 128 426 0 389 2 0 2 2 0 8 0 amappl7 120 119 0 107 1 0 1 1 0 8 0 amappl6 112 25 0 19 2 1 1 1 0 8 0 amappl5 104 213 0 196 1 0 1 1 0 8 0 amappl4 96 555 0 522 1 0 1 1 0 8 0 amappl3 88 179 0 171 1 0 1 1 0 8 0 amappl2 80 2054 0 1974 2 0 2 2 0 8 0 amappl1 72 18102 0 17639 24 14 10 18 0 8 0 amappl 80 1018 0 971 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 378 0 359 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 378 0 359 1 0 1 1 0 8 0 vmmpekpl 168 7433 0 7398 2 0 2 2 0 8 0 vmmpepl 168 52278 0 50260 111 23 88 102 0 357 0 vmsppl 368 377 0 359 2 0 2 2 0 8 0 pdppl 4096 764 0 720 6 0 6 6 0 8 0 pvpl 32 167663 0 150714 140 0 140 140 0 265 3 pmappl 232 377 0 359 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 263 0 9 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(ffffffff82520ff0) 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 __sanitizer_cov_trace_cmp4(7dc15,7dc16) at __sanitizer_cov_trace_cmp4+0x15 trace_cmp sys/dev/kcov.c:132 [inline] __sanitizer_cov_trace_cmp4(7dc15,7dc16) at __sanitizer_cov_trace_cmp4+0x15 sys/dev/kcov.c:170 __mp_lock(ffffffff8264d0a0) at __mp_lock+0x139 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8264d0a0) at __mp_lock+0x139 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __sanitizer_cov_trace_switch(0,ffffffff824d8970) at __sanitizer_cov_trace_switch+0x23 sys/dev/kcov.c:219 syscall(ffff800023187b60) at syscall+0x4ea sys/arch/amd64/amd64/trap.c:572 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff74e0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800021f91948,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800021f91790) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e380348,ffff800021f91948,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067df4998,ffff800021f91948,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed69d8,f0,ffff800021f91948,0,ffff800021f91a30) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed69d8,ffff800021f919e0,ffff800021f91a30) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f91ab0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f91ab0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xafadb8ce2d0, count: -8