uvm_fault(0xffffffff825446a0, 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(0xffffffff825446a0, 0xfffffd0000000018, 0, 1) -> e bpf_mtap(ffff8000009cf340,fffffd806d6f6300,2) at bpf_mtap+0x58 sys/net/bpf.c:1275 end trace frame: 0xffff800021bd3330, count: 0 ddb{0}> trace bpf_mtap(ffff8000009cf340,fffffd806d6f6300,2) at bpf_mtap+0x58 sys/net/bpf.c:1275 tun_dev_read(ffff800000a7b800,ffff800021bd35a8,10) at tun_dev_read+0x274 sys/net/if_tun.c:829 spec_read(ffff800021bd33f0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e487348,ffff800021bd35a8,10,fffffd807f7beae0) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd80668dc570,ffff800021bd35a8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ad69f8,f0,ffff800021bd35a8,0,ffff800021bd3690) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020ad69f8,ffff800021bd3640,ffff800021bd3690) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800021bd3710) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021bd3710) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x617402e7c80, count: -9 ddb{0}> show registers rdi 0xffffffff816ed975 bpf_mtap+0x55 rsi 0x122 rbp 0xffff800021bd32b0 rbx 0xfffffd0000000000 rdx 0x123 rcx 0xffff800022f80000 rax 0xe r8 0xffffffff81ea22a7 witness_assert+0x207 r9 0x5 r10 0x14 r11 0xac7b74609cffc38b r12 0xe r13 0x2 r14 0xfffffd806d6f6300 r15 0xffff8000009cf340 rip 0xffffffff816ed978 bpf_mtap+0x58 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021bd3230 ss 0x10 bpf_mtap+0x58: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=520213 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ad6018,0xffffffff8265aef0 process=0xffff800020aa2e10 user=0xffff800021bce000, vmspace=0xfffffd80791195d0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 96827 338687 99391 0 7 0 syz-executor.1 96827 459031 99391 0 3 0x4000080 fsleep syz-executor.1 *96827 520213 99391 0 7 0x4000000 syz-executor.1 81727 391522 66826 0 2 0x2 syz-executor.0 26697 428279 1 0 3 0x100083 ttyin getty 76605 380698 0 0 3 0x14200 acct acct 99391 178895 66826 0 3 0x82 nanosleep syz-executor.1 62075 38312 0 0 3 0x14200 bored sosplice 66826 198848 70052 0 3 0x82 thrsleep syz-fuzzer 66826 127742 70052 0 2 0x4000482 syz-fuzzer 66826 144094 70052 0 3 0x4000082 nanosleep syz-fuzzer 66826 12106 70052 0 3 0x4000082 thrsleep syz-fuzzer 66826 253692 70052 0 3 0x4000082 thrsleep syz-fuzzer 66826 515409 70052 0 3 0x4000082 thrsleep syz-fuzzer 66826 182213 70052 0 3 0x4000082 thrsleep syz-fuzzer 66826 101581 70052 0 3 0x4000082 kqread syz-fuzzer 66826 166242 70052 0 3 0x4000082 thrsleep syz-fuzzer 66826 452005 70052 0 3 0x4000082 thrsleep syz-fuzzer 70052 247297 46483 0 3 0x10008a pause ksh 46483 367394 17823 0 3 0x92 select sshd 17823 402886 1 0 3 0x80 select sshd 27821 284123 31441 74 3 0x100092 bpf pflogd 31441 269621 1 0 3 0x80 netio pflogd 63159 141487 13830 73 3 0x100090 kqread syslogd 13830 59836 1 0 3 0x100082 netio syslogd 53380 207059 0 0 3 0x14200 pgzero zerothread 34362 482633 0 0 3 0x14200 aiodoned aiodoned 35845 471454 0 0 3 0x14200 syncer update 43835 391284 0 0 3 0x14200 cleaner cleaner 5576 306140 0 0 3 0x14200 reaper reaper 60700 449860 0 0 3 0x14200 pgdaemon pagedaemon 67122 432875 0 0 3 0x14200 bored crynlk 88596 348140 0 0 3 0x14200 bored crypto 64154 343657 0 0 3 0x40014200 acpi0 acpi0 95620 439470 0 0 3 0x40014200 idle1 89420 52062 0 0 3 0x14200 bored softnet 5331 359753 0 0 3 0x14200 bored systqmp 31741 47896 0 0 3 0x14200 bored systq 79107 349724 0 0 3 0x40014200 bored softclock 91236 400087 0 0 3 0x40014200 idle0 67672 156917 0 0 3 0x14200 bored smr 1 331966 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 96827 (syz-executor.1) thread 0xffff800020ad69f8 (520213) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8265d820) #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 Process 81727 (syz-executor.0) thread 0xffff800020ad7650 (391522) exclusive rrwlock inode r = 0 (0xfffffd806e1e5b48) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #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:1323 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:91 #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:1776 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e5365f0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #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:1776 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [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 9575 6389K 7024K 78643K 13639 0 pcb 13 8K 8K 78643K 175 0 rtable 106 5K 5K 78643K 509 0 ifaddr 123 23K 23K 78643K 312 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1500 0 iov 0 0K 16K 78643K 174 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 2327 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 15 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 201 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 1129 0 sigio 0 0K 0K 78643K 27 0 proc 58 51K 83K 78643K 649 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 141 0 in_multi 174 7K 7K 78643K 328 0 ether_multi 1 0K 0K 78643K 33 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 121 546K 546K 78643K 121 0 exec 0 0K 1K 78643K 357 0 pfkey data 0 0K 0K 78643K 2 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 138 128K 128K 78643K 5103 0 UVM aobj 77 7K 7K 78643K 77 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 154 0 NDP 20 0K 0K 78643K 63 0 temp 160 3015K 3091K 78643K 39904 0 kqueue 3 4K 20K 78643K 170 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 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 458 0 458 1 0 1 1 0 8 1 rtentry 112 111 0 71 2 0 2 2 0 8 0 unpcb 120 2060 0 2052 2 1 1 2 0 8 0 syncache 264 15 0 15 5 5 0 1 0 8 0 tcpqe 32 286 0 286 3 3 0 1 0 8 0 tcpcb 544 480 0 476 4 3 1 2 0 8 0 inpcb 280 1392 0 1388 7 5 2 2 0 8 1 nd6 48 16 0 14 1 0 1 1 0 8 0 pkpcb 40 14 0 14 5 4 1 1 0 8 1 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 21 0 21 5 5 0 1 0 8 0 pffrag 232 21 0 21 5 5 0 1 0 482 0 pffrnode 88 21 0 21 5 5 0 1 0 8 0 pffrent 40 605 0 605 5 5 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 24 109 0 64 1 0 1 1 0 8 0 pfstkey 112 109 0 64 2 0 2 2 0 8 0 pfstate 328 109 0 64 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 603 0 381 17 3 14 17 0 8 0 art_table 32 607 0 381 3 0 3 3 0 8 0 art_node 16 110 0 72 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 197 0 187 1 0 1 1 0 8 0 shmpl 112 75 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 3249 0 1845 46 0 46 46 0 8 0 ffsino 272 3249 0 1845 95 0 95 95 0 8 0 nchpl 144 5524 0 3919 61 0 61 61 0 8 0 uvmvnodes 72 4016 0 0 74 0 74 74 0 8 0 vnodes 208 4016 0 0 212 0 212 212 0 8 0 namei 1024 18469 0 18469 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 9 0 0 2 0 2 2 0 8 0 vmpool 560 9 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 192 14804 0 14804 11 10 1 6 0 8 1 plimitpl 152 111 0 104 1 0 1 1 0 8 0 sigapl 432 1323 0 1310 3 1 2 3 0 8 0 futexpl 56 26536 0 26535 1 0 1 1 0 8 0 knotepl 112 289 0 270 1 0 1 1 0 8 0 kqueuepl 104 427 0 425 1 0 1 1 0 8 0 pipelkpl 48 363 0 353 1 0 1 1 0 8 0 pipepl 120 726 0 707 3 2 1 2 0 8 0 fdescpl 496 1324 0 1310 3 0 3 3 0 8 0 filepl 152 13790 0 13699 13 6 7 7 0 8 3 lockfpl 104 1598 0 1598 1 0 1 1 0 8 1 lockfspl 48 511 0 511 1 0 1 1 0 8 1 sessionpl 112 21 0 12 1 0 1 1 0 8 0 pgrppl 48 39 0 30 1 0 1 1 0 8 0 ucredpl 96 2822 0 2814 1 0 1 1 0 8 0 zombiepl 144 1310 0 1310 1 0 1 1 0 8 1 processpl 896 1341 0 1310 4 0 4 4 0 8 0 procpl 632 4142 0 4100 6 2 4 5 0 8 0 srpgc 64 7 0 7 2 1 1 1 0 8 1 sosppl 128 35 0 35 5 4 1 1 0 8 1 sockpl 384 3965 0 3953 12 7 5 7 0 8 3 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 9 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 161 0 0 20 0 20 20 0 8 0 mtagpl 80 62 0 0 2 0 2 2 0 8 0 mbufpl 256 496 0 0 26 0 26 26 0 8 0 bufpl 280 8830 0 1760 506 0 506 506 0 8 0 anonpl 16 145656 0 130173 108 42 66 80 0 125 0 amapchunkpl 152 9106 0 8970 22 15 7 20 0 158 0 amappl16 192 7135 0 6293 92 48 44 55 0 8 1 amappl15 184 529 0 524 1 0 1 1 0 8 0 amappl14 176 507 0 505 1 0 1 1 0 8 0 amappl13 168 42 0 41 1 0 1 1 0 8 0 amappl12 160 10 0 9 1 0 1 1 0 8 0 amappl11 152 64 0 56 1 0 1 1 0 8 0 amappl10 144 13 0 7 1 0 1 1 0 8 0 amappl9 136 630 0 627 1 0 1 1 0 8 0 amappl8 128 169 0 141 1 0 1 1 0 8 0 amappl7 120 125 0 110 1 0 1 1 0 8 0 amappl6 112 69 0 59 1 0 1 1 0 8 0 amappl5 104 155 0 143 1 0 1 1 0 8 0 amappl4 96 1597 0 1567 1 0 1 1 0 8 0 amappl3 88 633 0 624 1 0 1 1 0 8 0 amappl2 80 10125 0 10057 3 1 2 3 0 8 0 amappl1 72 39282 0 38856 26 16 10 21 0 8 0 amappl 80 4454 0 4402 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 76 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1333 0 1310 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1333 0 1310 1 0 1 1 0 8 0 vmmpekpl 168 15295 0 15260 2 0 2 2 0 8 0 vmmpepl 168 171150 0 169177 172 58 114 120 0 357 21 vmsppl 368 1332 0 1310 3 0 3 3 0 8 0 pdppl 4096 2673 0 2629 6 0 6 6 0 8 0 pvpl 32 422809 0 404179 223 50 173 192 0 265 17 pmappl 232 1332 0 1310 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 191 0 9 6 0 6 6 0 8 0