uvm_fault(0xffffffff82606e90, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at bpf_mtap+0x58: 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(0xffffffff82606e90, 0xfffffd0000000018, 0, 1) -> e bpf_mtap(ffff8000009d4400,fffffd8063131000,2) at bpf_mtap+0x58 sys/net/bpf.c:1275 end trace frame: 0xffff800023bb7950, count: 0 ddb{0}> trace bpf_mtap(ffff8000009d4400,fffffd8063131000,2) at bpf_mtap+0x58 sys/net/bpf.c:1275 tun_dev_read(ffff800000a1c800,ffff800023bb7bc8,10) at tun_dev_read+0x274 sys/net/if_tun.c:829 spec_read(ffff800023bb7a10) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3ef1a8,ffff800023bb7bc8,10,fffffd807f7be7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd80669fcc90,ffff800023bb7bc8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ac8290,f0,ffff800023bb7bc8,0,ffff800023bb7cb0) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020ac8290,ffff800023bb7c60,ffff800023bb7cb0) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800023bb7d30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bb7d30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7349ef05230, count: -9 ddb{0}> show registers rdi 0xffffffff81645fd5 bpf_mtap+0x55 rsi 0x122 rbp 0xffff800023bb78d0 rbx 0xfffffd0000000000 rdx 0x123 rcx 0xffff800021b9a000 rax 0xe r8 0xffffffff818af467 witness_assert+0x207 r9 0x5 r10 0x14 r11 0xe7254207d85698be r12 0xe r13 0x2 r14 0xfffffd8063131000 r15 0xffff8000009d4400 rip 0xffffffff81645fd8 bpf_mtap+0x58 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023bb7850 ss 0x10 bpf_mtap+0x58: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=287211 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac8ee8,0xffffffff8262e790 process=0xffff800020af4700 user=0xffff800023bb2000, vmspace=0xfffffd807f000450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49113 66757 31410 0 2 0 syz-executor.1 *49113 287211 31410 0 7 0x4000000 syz-executor.1 33882 430452 90598 0 7 0x482 syz-executor.0 52203 245710 1 0 3 0x100083 ttyin getty 31410 25896 90598 0 2 0x482 syz-executor.1 90598 174057 55511 0 3 0x82 thrsleep syz-fuzzer 90598 268543 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 173939 55511 0 3 0x4000082 kqread syz-fuzzer 90598 286922 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 178790 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 227847 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 97803 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 85037 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 421447 55511 0 3 0x4000082 thrsleep syz-fuzzer 90598 155523 55511 0 3 0x4000082 thrsleep syz-fuzzer 55511 293062 18150 0 3 0x10008a pause ksh 18150 11589 41975 0 3 0x92 select sshd 41975 129011 1 0 3 0x80 select sshd 14643 107535 38464 74 3 0x100092 bpf pflogd 38464 142654 1 0 3 0x80 netio pflogd 21645 207224 87570 73 3 0x100090 kqread syslogd 87570 138360 1 0 3 0x100082 netio syslogd 37928 485076 0 0 3 0x14200 pgzero zerothread 97339 128602 0 0 3 0x14200 aiodoned aiodoned 2029 149479 0 0 3 0x14200 syncer update 12402 322956 0 0 3 0x14200 cleaner cleaner 26504 327363 0 0 3 0x14200 reaper reaper 65916 441797 0 0 3 0x14200 pgdaemon pagedaemon 61780 250355 0 0 3 0x14200 bored crynlk 62764 473272 0 0 3 0x14200 bored crypto 21586 497329 0 0 3 0x40014200 acpi0 acpi0 79760 172777 0 0 3 0x40014200 idle1 7354 42979 0 0 3 0x14200 bored softnet 69446 325951 0 0 3 0x14200 bored systqmp 45103 42331 0 0 3 0x14200 bored systq 83030 147508 0 0 3 0x40014200 bored softclock 13504 369074 0 0 3 0x40014200 idle0 93051 457988 0 0 3 0x14200 bored smr 1 109402 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49113 (syz-executor.1) thread 0xffff800020ac8290 (287211) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82627820) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a2 sys/kern/sys_generic.c:236 #3 sys_read+0x83 sys/kern/sys_generic.c:156 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9535 6360K 6935K 78643K 11351 0 pcb 13 8K 8K 78643K 72 0 rtable 102 3K 4K 78643K 319 0 ifaddr 83 15K 17K 78643K 180 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 16K 78643K 56 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1471 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 1K 1K 78643K 19 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 323 0 sigio 0 0K 0K 78643K 3 0 proc 56 51K 83K 78643K 535 0 subproc 32 2K 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 18 0 in_multi 49 3K 3K 78643K 83 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 247 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 114 22K 37K 78643K 2082 0 UVM aobj 30 2K 2K 78643K 30 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 59 0 NDP 15 0K 0K 78643K 40 0 temp 139 3021K 3086K 78643K 5958 0 kqueue 3 4K 22K 78643K 45 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 10 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 63 0 63 1 0 1 1 0 8 1 rtentry 112 70 0 29 2 0 2 2 0 8 0 unpcb 120 1275 0 1267 2 0 2 2 0 8 1 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 308 0 308 1 1 0 1 0 8 0 tcpcb 544 148 0 144 3 1 2 2 0 8 1 inpcb 280 482 0 478 4 2 2 3 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 8 0 5 1 0 1 1 0 8 0 ppxss 1128 14 0 14 1 0 1 1 0 8 1 pffrag 232 5 0 5 2 1 1 1 0 482 1 pffrnode 88 5 0 5 2 1 1 1 0 8 1 pffrent 40 183 0 183 2 1 1 1 0 8 1 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 41 0 5 1 0 1 1 0 8 0 pfstkey 112 41 0 5 2 0 2 2 0 8 0 pfstate 328 41 0 5 3 0 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 256 325 0 121 15 2 13 15 0 8 0 art_table 32 326 0 121 2 0 2 2 0 8 0 art_node 16 69 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 28 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1880 0 470 46 0 46 46 0 8 0 ffsino 272 1880 0 470 95 0 95 95 0 8 0 nchpl 144 2556 0 950 61 0 61 61 0 8 0 uvmvnodes 72 2106 0 0 39 0 39 39 0 8 0 vnodes 208 2106 0 0 111 0 111 111 0 8 0 namei 1024 7626 0 7626 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 2 1 0 1 1 0 8 0 scxspl 192 6871 0 6871 8 7 1 7 0 8 1 plimitpl 152 46 0 39 1 0 1 1 0 8 0 sigapl 432 520 0 507 3 1 2 3 0 8 0 futexpl 56 6873 0 6873 1 0 1 1 0 8 1 knotepl 112 267 0 248 3 1 2 2 0 8 1 kqueuepl 104 94 0 92 1 0 1 1 0 8 0 pipelkpl 48 179 0 169 1 0 1 1 0 8 0 pipepl 120 358 0 339 2 1 1 2 0 8 0 fdescpl 496 521 0 507 3 0 3 3 0 8 0 filepl 152 4762 0 4671 7 1 6 7 0 8 2 lockfpl 104 65 0 65 1 0 1 1 0 8 1 lockfspl 48 27 0 27 1 0 1 1 0 8 1 sessionpl 112 20 0 11 1 0 1 1 0 8 0 pgrppl 48 24 0 15 1 0 1 1 0 8 0 ucredpl 96 382 0 374 1 0 1 1 0 8 0 zombiepl 144 507 0 506 1 0 1 1 0 8 0 processpl 896 536 0 506 4 0 4 4 0 8 0 procpl 632 1244 0 1204 5 1 4 5 0 8 0 sockpl 400 1829 0 1817 6 0 6 6 0 8 4 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 80 19 0 0 1 0 1 1 0 8 0 mbufpl 256 322 0 0 20 0 20 20 0 8 0 bufpl 280 6704 0 1340 384 0 384 384 0 8 0 anonpl 16 70235 0 54521 80 7 73 79 0 125 9 amapchunkpl 152 3291 0 3155 21 1 20 20 0 158 13 amappl16 192 2627 0 1771 55 10 45 55 0 8 1 amappl15 184 112 0 106 1 0 1 1 0 8 0 amappl14 176 185 0 179 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 1 0 1 0 8 0 amappl12 160 4 0 3 2 1 1 1 0 8 0 amappl11 152 57 0 49 1 0 1 1 0 8 0 amappl10 144 13 0 7 1 0 1 1 0 8 0 amappl9 136 700 0 697 1 0 1 1 0 8 0 amappl8 128 215 0 192 1 0 1 1 0 8 0 amappl7 120 121 0 108 1 0 1 1 0 8 0 amappl6 112 58 0 51 1 0 1 1 0 8 0 amappl5 104 141 0 129 1 0 1 1 0 8 0 amappl4 96 647 0 619 1 0 1 1 0 8 0 amappl3 88 404 0 393 1 0 1 1 0 8 0 amappl2 80 3232 0 3158 3 1 2 3 0 8 0 amappl1 72 21406 0 20986 26 16 10 21 0 8 0 amappl 80 1513 0 1472 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 29 0 0 1 0 1 1 0 8 0 uaddrrnd 24 525 0 509 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 525 0 509 1 0 1 1 0 8 0 vmmpekpl 168 7925 0 7888 2 0 2 2 0 8 0 vmmpepl 168 71798 0 69826 132 14 118 119 0 357 27 vmsppl 368 524 0 509 2 0 2 2 0 8 0 pdppl 4096 1057 0 1020 6 1 5 6 0 8 0 pvpl 32 211543 0 192713 195 7 188 194 0 265 35 pmappl 232 524 0 509 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 183 0 7 6 0 6 6 0 8 0