uvm_fault(0xffffffff82638d88, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at bpf_mtap+0x58: 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(0xffffffff82638d88, 0xfffffd0000000018, 0, 1) -> e bpf_mtap(ffff800000a25580,fffffd80695f2600,2) at bpf_mtap+0x58 sys/net/bpf.c:1273 end trace frame: 0xffff800023fad0a0, count: 0 ddb{1}> trace bpf_mtap(ffff800000a25580,fffffd80695f2600,2) at bpf_mtap+0x58 sys/net/bpf.c:1273 tun_dev_read(5d01,ffff800023fad318,10) at tun_dev_read+0x10f spec_read(ffff800023fad160) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e6a2348,ffff800023fad318,10,fffffd807f7bf6c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8065b67d28,ffff800023fad318,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed6768,f0,ffff800023fad318,0,ffff800023fad400) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed6768,ffff800023fad3b0,ffff800023fad400) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fad480) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fad480) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xde269ffcd00, count: -9 ddb{1}> show registers rdi 0xffffffff815c62d5 bpf_mtap+0x55 rsi 0x49a rbp 0xffff800023fad030 rbx 0xfffffd0000000000 rdx 0x49b rcx 0xffff8000233a4000 rax 0xe r8 0xffffffff82215123 pp_r600_decoded_lanes+0x6961 r9 0xffff800000a24e64 r10 0x14 r11 0x4d9b07d8802681c8 r12 0xe r13 0x2 r14 0xfffffd80695f2600 r15 0xffff800000a25580 rip 0xffffffff815c62d8 bpf_mtap+0x58 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023facfb0 ss 0x10 bpf_mtap+0x58: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=29857 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed69d8,0xffffffff8263eb20 process=0xffff800020e923f8 user=0xffff800023fa8000, vmspace=0xfffffd807efff730 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17921 511385 88195 0 2 0 syz-executor.1 17921 504398 88195 0 3 0x4000080 bpf syz-executor.1 17921 264300 88195 0 3 0x4000080 bpf syz-executor.1 *17921 29857 88195 0 7 0x4000000 syz-executor.1 90819 460696 1 0 3 0x100083 ttyin getty 19479 137779 0 0 3 0x14200 bored sosplice 88195 18861 84492 0 3 0x82 nanosleep syz-executor.1 84492 163115 58988 0 3 0x82 thrsleep syz-fuzzer 84492 5761 58988 0 3 0x4000082 nanosleep syz-fuzzer 84492 500009 58988 0 3 0x4000082 thrsleep syz-fuzzer 84492 180246 58988 0 3 0x4000082 kqread syz-fuzzer 84492 263386 58988 0 7 0x4000002 syz-fuzzer 84492 267912 58988 0 3 0x4000082 thrsleep syz-fuzzer 84492 459361 58988 0 3 0x4000082 thrsleep syz-fuzzer 84492 100019 58988 0 3 0x4000082 thrsleep syz-fuzzer 84492 479793 58988 0 3 0x4000082 thrsleep syz-fuzzer 84492 364985 58988 0 3 0x4000082 thrsleep syz-fuzzer 58988 376695 64224 0 3 0x10008a pause ksh 64224 61242 45413 0 3 0x92 select sshd 45413 144173 1 0 3 0x80 select sshd 89532 424524 28540 74 3 0x100092 bpf pflogd 28540 350616 1 0 3 0x80 netio pflogd 80474 377521 10256 73 3 0x100090 kqread syslogd 10256 382121 1 0 3 0x100082 netio syslogd 79080 265606 1 77 3 0x100090 poll dhclient 30031 105805 1 0 3 0x80 poll dhclient 22832 491557 0 0 3 0x14200 bored smr 12422 493556 0 0 2 0x14200 zerothread 42556 214602 0 0 3 0x14200 aiodoned aiodoned 31874 466586 0 0 3 0x14200 syncer update 5044 400056 0 0 3 0x14200 cleaner cleaner 62482 263826 0 0 3 0x14200 reaper reaper 88100 195300 0 0 3 0x14200 pgdaemon pagedaemon 4539 142528 0 0 3 0x14200 bored crynlk 29253 367239 0 0 3 0x14200 bored crypto 80365 497301 0 0 3 0x40014200 acpi0 acpi0 95820 332506 0 0 3 0x40014200 idle1 47321 291532 0 0 3 0x14200 bored softnet 90397 124373 0 0 3 0x14200 bored systqmp 59064 350485 0 0 3 0x14200 bored systq 8560 96726 0 0 3 0x40014200 bored softclock 14432 25285 0 0 3 0x40014200 idle0 1 329922 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17921 (syz-executor.1) thread 0xffff800020ed6768 (29857) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82646910) #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 9555 6438K 6865K 78643K 11293 0 pcb 13 8K 8K 78643K 135 0 rtable 89 3K 4K 78643K 398 0 ifaddr 91 16K 18K 78643K 156 0 counters 41 33K 34K 78643K 63 0 ioctlops 0 0K 4K 78643K 1496 0 iov 0 0K 24K 78643K 221 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1479 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 96 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 486 0 sigio 0 0K 0K 78643K 4 0 proc 61 63K 95K 78643K 543 0 subproc 16 1K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 431 0 in_multi 52 2K 3K 78643K 141 0 ether_multi 1 0K 0K 78643K 20 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 260 0 pfkey data 0 0K 0K 78643K 4 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 124 15K 48K 78643K 2641 0 UVM aobj 27 2K 2K 78643K 27 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 81 0 NDP 16 0K 0K 78643K 36 0 temp 105 3039K 3105K 78643K 6417 0 kqueue 3 4K 12K 78643K 25 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 55 0 53 1 0 1 1 0 8 0 rtentry 112 78 0 45 2 0 2 2 0 8 0 unpcb 120 325 0 315 1 0 1 1 0 8 0 syncache 264 8 0 8 2 2 0 1 0 8 0 tcpqe 32 219 0 219 2 2 0 2 0 8 0 tcpcb 544 621 0 617 3 1 2 2 0 8 1 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 4 0 4 1 0 1 1 0 8 1 inpcb 280 1030 0 1023 2 0 2 2 0 8 1 nd6 48 12 0 11 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 ppxss 1128 2 0 2 2 1 1 1 0 8 1 pffrag 232 6 0 6 2 2 0 1 0 482 0 pffrnode 88 6 0 6 2 2 0 1 0 8 0 pffrent 40 141 0 141 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 49 0 10 1 0 1 1 0 8 0 pfstkey 112 49 0 10 2 0 2 2 0 8 0 pfstate 328 49 0 10 4 0 4 4 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 256 333 0 189 13 1 12 13 0 8 0 art_table 32 334 0 189 2 0 2 2 0 8 0 art_node 16 77 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 12 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 94 0 84 1 0 1 1 0 8 0 shmpl 112 25 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2140 0 735 89 0 89 89 0 8 0 ffsino 272 2140 0 735 95 0 95 95 0 8 0 nchpl 144 3059 0 1454 61 0 61 61 0 8 0 uvmvnodes 72 2347 0 0 43 0 43 43 0 8 0 vnodes 208 2347 0 0 124 0 124 124 0 8 0 namei 1024 8480 0 8480 1 0 1 1 0 8 1 percpumem 16 42 0 11 1 0 1 1 0 8 0 vmpool 560 6 0 6 2 1 1 1 0 8 1 scxspl 192 9142 0 9142 10 7 3 7 0 8 3 plimitpl 152 58 0 51 1 0 1 1 0 8 0 sigapl 424 701 0 670 4 0 4 4 0 8 0 futexpl 56 7713 0 7713 1 0 1 1 0 8 1 knotepl 112 92 0 75 1 0 1 1 0 8 0 kqueuepl 144 74 0 72 1 0 1 1 0 8 0 pipelkpl 48 145 0 136 1 0 1 1 0 8 0 pipepl 120 290 0 275 1 0 1 1 0 8 0 fdescpl 496 684 0 669 3 0 3 3 0 8 0 filepl 152 4533 0 4453 5 0 5 5 0 8 1 lockfpl 104 274 0 273 1 0 1 1 0 8 0 lockfspl 48 105 0 104 1 0 1 1 0 8 0 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 449 0 440 1 0 1 1 0 8 0 zombiepl 144 670 0 670 1 0 1 1 0 8 1 processpl 984 701 0 670 5 0 5 5 0 8 0 procpl 624 1747 0 1704 4 0 4 4 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 10 0 10 1 1 0 1 0 8 0 sockpl 400 1421 0 1402 4 0 4 4 0 8 2 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 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 237 0 0 28 0 28 28 0 8 0 mtagpl 80 33 0 0 1 0 1 1 0 8 0 mbufpl 256 271 0 0 16 0 16 16 0 8 0 bufpl 280 5154 0 194 355 0 355 355 0 8 0 anonpl 16 73041 0 60750 72 6 66 69 0 124 1 amapchunkpl 152 4587 0 4446 25 9 16 20 0 158 10 amappl16 192 2962 0 2094 45 0 45 45 0 8 1 amappl15 184 204 0 203 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 39 0 37 1 0 1 1 0 8 0 amappl12 160 19 0 13 1 0 1 1 0 8 0 amappl11 152 55 0 40 1 0 1 1 0 8 0 amappl10 144 254 0 247 1 0 1 1 0 8 0 amappl9 136 386 0 385 1 0 1 1 0 8 0 amappl8 128 391 0 352 2 0 2 2 0 8 0 amappl7 120 362 0 348 1 0 1 1 0 8 0 amappl6 112 25 0 22 2 1 1 1 0 8 0 amappl5 104 592 0 574 1 0 1 1 0 8 0 amappl4 96 504 0 474 1 0 1 1 0 8 0 amappl3 88 121 0 116 1 0 1 1 0 8 0 amappl2 80 4686 0 4621 3 1 2 3 0 8 0 amappl1 72 25298 0 24860 25 15 10 20 0 8 0 amappl 80 2013 0 1967 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 26 0 0 1 0 1 1 0 8 0 uaddrrnd 24 690 0 675 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 690 0 675 1 0 1 1 0 8 0 vmmpekpl 168 9273 0 9240 2 0 2 2 0 8 0 vmmpepl 168 90621 0 88653 149 26 123 123 0 357 32 vmsppl 368 689 0 675 2 0 2 2 0 8 0 pdppl 4096 1388 0 1350 6 0 6 6 0 8 0 pvpl 32 236896 0 221481 169 7 162 168 0 265 7 pmappl 232 689 0 675 3 1 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 273 0 5 8 0 8 8 0 8 0