uvm_fault(0xffffffff82896e98, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at _bpf_mtap+0x68: movl 0x18(%rbx),%r13d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffffff82896e98, 0xfffffd0000000018, 0, 1) -> e _bpf_mtap(ffff800000af4180,fffffd806d50d700,fffffd806d50d700,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281 end trace frame: 0xffff800023d07a70, count: 0 ddb{1}> trace _bpf_mtap(ffff800000af4180,fffffd806d50d700,fffffd806d50d700,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281 tun_dev_read(5d01,ffff800023d07ce8,10) at tun_dev_read+0x113 spec_read(ffff800023d07b30) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e5f14e8,ffff800023d07ce8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80675f5c90,ffff800023d07ce8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e47608,f0,ffff800023d07ce8,0,ffff800023d07dd0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e47608,ffff800023d07d80,ffff800023d07dd0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023d07e50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023d07e50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x55ccf637810, count: -9 ddb{1}> show registers rdi 0xffffffff822f9505 _bpf_mtap+0x65 rsi 0x14c rbp 0xffff800023d07a00 rbx 0xfffffd0000000000 rdx 0x14d rcx 0xffff800023102000 rax 0xe r8 0xffffffff8240d1de pp_r600_decoded_lanes+0x64cd r9 0xffff800000ac3664 r10 0xa r11 0x10df3a884f846cfa r12 0xfffffd806d50d700 r13 0xe r14 0x2 r15 0xffff800000af4180 rip 0xffffffff822f9508 _bpf_mtap+0x68 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023d07960 ss 0x10 _bpf_mtap+0x68: movl 0x18(%rbx),%r13d ddb{1}> show proc PROC (syz-executor.1) pid=394844 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e47398,0xffffffff8289d6e0 process=0xffff800022ef0030 user=0xffff800023d02000, vmspace=0xfffffd807f000170 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79366 270305 66614 0 7 0 syz-executor.1 *79366 394844 66614 0 7 0x4000000 syz-executor.1 88419 272569 0 0 3 0x14200 bored sosplice 6664 378069 0 0 3 0x14280 nfsidl nfsio 51605 308378 0 0 3 0x14280 nfsidl nfsio 38404 257254 0 0 3 0x14280 nfsidl nfsio 49783 407892 0 0 3 0x14280 nfsidl nfsio 52834 517080 0 0 3 0x14280 nfsidl nfsio 71004 214618 0 0 3 0x14280 nfsidl nfsio 16362 376529 0 0 3 0x14280 nfsidl nfsio 11097 73439 0 0 3 0x14280 nfsidl nfsio 18553 49012 0 0 3 0x14280 nfsidl nfsio 87225 66794 0 0 3 0x14280 nfsidl nfsio 74245 353959 0 0 3 0x14280 nfsidl nfsio 22643 233351 0 0 3 0x14280 nfsidl nfsio 12219 29547 0 0 3 0x14280 nfsidl nfsio 23497 324847 0 0 3 0x14280 nfsidl nfsio 17434 338188 0 0 3 0x14280 nfsidl nfsio 32800 80215 0 0 3 0x14280 nfsidl nfsio 51251 523645 0 0 3 0x14280 nfsidl nfsio 69114 10300 0 0 3 0x14280 nfsidl nfsio 63012 295124 0 0 3 0x14280 nfsidl nfsio 57836 286705 0 0 3 0x14280 nfsidl nfsio 66614 110946 19308 0 3 0x82 nanosleep syz-executor.1 77215 496348 19308 0 3 0x2 biowait syz-executor.0 19308 400288 53865 0 3 0x82 thrsleep syz-fuzzer 19308 189192 53865 0 3 0x4000082 nanosleep syz-fuzzer 19308 300526 53865 0 3 0x4000082 thrsleep syz-fuzzer 19308 48312 53865 0 3 0x4000082 thrsleep syz-fuzzer 19308 154273 53865 0 3 0x4000082 thrsleep syz-fuzzer 19308 252316 53865 0 3 0x4000082 thrsleep syz-fuzzer 19308 488498 53865 0 3 0x4000082 thrsleep syz-fuzzer 19308 402807 53865 0 3 0x4000082 nanosleep syz-fuzzer 19308 72793 53865 0 3 0x4000082 kqread syz-fuzzer 19308 378976 53865 0 3 0x4000082 thrsleep syz-fuzzer 53865 482415 11620 0 3 0x10008a pause ksh 11620 466404 91684 0 3 0x92 select sshd 54873 100154 1 0 3 0x100083 ttyin getty 91684 132108 1 0 3 0x80 select sshd 5536 390259 65726 74 3 0x100092 bpf pflogd 65726 464306 1 0 3 0x80 netio pflogd 20219 314923 66589 73 3 0x100090 kqread syslogd 66589 148457 1 0 3 0x100082 netio syslogd 73780 266812 1 77 3 0x100090 poll dhclient 7980 211159 1 0 3 0x80 poll dhclient 38830 167735 0 0 3 0x14200 bored smr 81970 349611 0 0 3 0x14200 pgzero zerothread 87622 182824 0 0 3 0x14200 aiodoned aiodoned 93278 176833 0 0 3 0x14200 syncer update 12474 436055 0 0 3 0x14200 cleaner cleaner 77207 484888 0 0 3 0x14200 reaper reaper 45533 458963 0 0 3 0x14200 pgdaemon pagedaemon 38143 407649 0 0 3 0x14200 bored crynlk 21789 154954 0 0 3 0x14200 bored crypto 78834 296623 0 0 3 0x40014200 acpi0 acpi0 28059 323495 0 0 3 0x40014200 idle1 51263 220094 0 0 3 0x14200 bored softnet 73907 467452 0 0 3 0x14200 bored systqmp 40238 36425 0 0 3 0x14200 bored systq 69227 435484 0 0 3 0x40014200 bored softclock 18774 219938 0 0 3 0x40014200 idle0 1 297945 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79366 (syz-executor.1) thread 0xffff800020e47608 (394844) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b9310) #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 77215 (syz-executor.0) thread 0xffff800020ddcea8 (496348) exclusive rrwlock inode r = 0 (0xfffffd807eb1b6f8) #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 (0xfffffd806b215808) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9530 6672K 7831K 78643K 14353 0 pcb 13 8K 8K 78643K 62 0 rtable 104 4K 5K 78643K 1593 0 ifaddr 79 16K 16K 78643K 110 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1547 0 iov 0 0K 16K 78643K 42 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 2110 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 53 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 161 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 2064 0 sigio 0 0K 0K 78643K 8 0 proc 61 63K 95K 78643K 484 0 subproc 32 2K 2K 78643K 36 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 25 0 in_multi 54 2K 2K 78643K 87 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 248 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 130 39K 55K 78643K 6379 0 UVM aobj 130 4K 4K 78643K 138 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 28 0 NDP 11 0K 0K 78643K 18 0 temp 134 3862K 3926K 78643K 11993 0 kqueue 3 4K 16K 78643K 31 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 7 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 34 0 32 1 0 1 1 0 8 0 rtentry 112 712 0 672 2 0 2 2 0 8 0 unpcb 120 1721 0 1711 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 sackhl 24 1 0 1 1 0 1 1 0 8 1 tcpcb 544 893 0 889 1 0 1 1 0 8 0 inpcb 296 3417 0 3410 2 0 2 2 0 8 1 nd6 48 9 0 5 1 0 1 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 7 0 1 2 1 1 1 0 482 0 pffrnode 88 6 0 1 2 1 1 1 0 8 0 pffrent 40 14 0 8 2 1 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 pfrktable 1344 6 0 3 2 1 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 18 0 14 1 0 1 1 0 8 0 pfstkey 112 18 0 14 1 0 1 1 0 8 0 pfstate 328 17 0 14 2 1 1 2 0 8 0 pfrule 1360 30 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4039 0 3857 13 0 13 13 0 8 0 art_table 32 4040 0 3857 2 0 2 2 0 8 0 art_node 16 690 0 653 1 0 1 1 0 8 0 sysvmsgpl 40 32 0 15 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 155 0 145 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3626 0 2224 89 1 88 89 0 8 0 ffsino 272 3626 0 2224 94 0 94 94 0 8 0 nchpl 144 6345 0 4738 60 0 60 60 0 8 0 uvmvnodes 72 4479 0 0 82 0 82 82 0 8 0 vnodes 208 4479 0 0 236 0 236 236 0 8 0 namei 1024 16793 0 16793 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 4 0 2 2 1 1 1 0 8 0 pfiaddrpl 120 3 0 0 1 0 1 1 0 8 0 scxspl 192 18417 0 18416 9 8 1 7 0 8 0 plimitpl 152 63 0 55 1 0 1 1 0 8 0 sigapl 424 2300 0 2248 6 0 6 6 0 8 0 futexpl 56 23917 0 23917 1 0 1 1 0 8 1 knotepl 112 88 0 69 1 0 1 1 0 8 0 kqueuepl 144 140 0 138 1 0 1 1 0 8 0 pipelkpl 48 174 0 164 1 0 1 1 0 8 0 pipepl 120 348 0 329 1 0 1 1 0 8 0 fdescpl 496 2264 0 2248 3 0 3 3 0 8 0 filepl 152 12437 0 12332 5 0 5 5 0 8 0 lockfpl 104 130 0 128 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 1595 0 1586 1 0 1 1 0 8 0 zombiepl 144 2248 0 2248 1 0 1 1 0 8 1 processpl 984 2300 0 2248 7 0 7 7 0 8 0 procpl 624 5610 0 5548 6 0 6 6 0 8 1 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 400 5173 0 5154 5 1 4 4 0 8 2 mcl64k 65536 10 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 186 0 0 23 1 22 23 0 8 0 mtagpl 96 310 0 0 8 0 8 8 0 8 0 mbufpl 256 889 0 0 54 0 54 54 0 8 0 bufpl 280 6056 0 135 423 0 423 423 0 8 0 anonpl 16 176119 0 160561 88 24 64 78 0 124 0 amapchunkpl 152 10519 0 10382 34 28 6 20 0 158 0 amappl16 192 10675 0 9823 61 18 43 54 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 25 0 21 1 0 1 1 0 8 0 amappl13 168 39 0 34 1 0 1 1 0 8 0 amappl12 160 9 0 7 1 0 1 1 0 8 0 amappl11 152 59 0 44 1 0 1 1 0 8 0 amappl10 144 2054 0 2046 1 0 1 1 0 8 0 amappl9 136 383 0 382 1 0 1 1 0 8 0 amappl8 128 367 0 327 2 0 2 2 0 8 0 amappl7 120 2148 0 2134 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 2188 0 2172 1 0 1 1 0 8 0 amappl4 96 488 0 460 1 0 1 1 0 8 0 amappl3 88 162 0 156 1 0 1 1 0 8 0 amappl2 80 17138 0 17067 2 0 2 2 0 8 0 amappl1 72 50930 0 50491 23 13 10 18 0 8 0 amappl 80 5839 0 5796 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 64 137 0 8 3 0 3 3 0 8 0 uaddrrnd 24 2268 0 2250 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2268 0 2250 1 0 1 1 0 8 0 vmmpekpl 168 15516 0 15474 4 1 3 3 0 8 0 vmmpepl 168 267409 0 265396 122 27 95 105 0 357 3 vmsppl 368 2267 0 2250 2 0 2 2 0 8 0 pdppl 4096 4543 0 4502 6 0 6 6 0 8 0 pvpl 32 539435 0 520592 204 48 156 192 0 265 1 pmappl 232 2267 0 2250 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 309 0 6 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff826fcff0) 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 __mp_lock(ffffffff828b9108) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b9108) at __mp_lock+0x127 sys/kern/kern_lock.c:147 intr_handler(ffff800023101140,ffff80000004a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f __sanitizer_cov_trace_switch(2,ffffffff826ed1c0) at __sanitizer_cov_trace_switch+0x120 kd_curproc sys/dev/kcov.c:411 [inline] __sanitizer_cov_trace_switch(2,ffffffff826ed1c0) at __sanitizer_cov_trace_switch+0x120 trace_cmp sys/dev/kcov.c:104 [inline] __sanitizer_cov_trace_switch(2,ffffffff826ed1c0) at __sanitizer_cov_trace_switch+0x120 sys/dev/kcov.c:203 syscall(ffff800023101310) at syscall+0x19c sys/arch/amd64/amd64/trap.c:542 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff8160, count: -9 ddb{0}> machine ddbcpu 1 Stopped at _bpf_mtap+0x68: movl 0x18(%rbx),%r13d ddb{1}> trace _bpf_mtap(ffff800000af4180,fffffd806d50d700,fffffd806d50d700,2) at _bpf_mtap+0x68 sys/net/bpf.c:1281 tun_dev_read(5d01,ffff800023d07ce8,10) at tun_dev_read+0x113 spec_read(ffff800023d07b30) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e5f14e8,ffff800023d07ce8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80675f5c90,ffff800023d07ce8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e47608,f0,ffff800023d07ce8,0,ffff800023d07dd0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e47608,ffff800023d07d80,ffff800023d07dd0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023d07e50) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023d07e50) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x55ccf637810, count: -9