*cpu0: uvm_fault(0xfffffd806904e028, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7031cefaa990, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000384116e0 rbx 0 rdx 0 rcx 0xffff800034bf82b0 rax 0x2a r8 0xffff800038411610 r9 0x1 r10 0xed11cefd75427d2b r11 0x986d9626af7f863a r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82cd04c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800038411660 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=210624 pid=39465 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2a9498,0xffffffff838d9518 process=0xffff80003c4553a8 user=0xffff80003840c000, vmspace=0xfffffd806904e5e0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *39465 210624 43971 0 7 0 syz-executor 56074 250623 35676 0 2 0 syz-executor 6438 366643 95941 0 2 0 syz-executor 6438 382755 95941 0 3 0x4000080 kqsel syz-executor 87406 167401 0 0 3 0x14200 acct acct 25247 229022 10842 0 3 0x80 nanoslp syz-executor 25247 365037 10842 0 3 0x4000080 sbwait syz-executor 73767 285980 71996 0 3 0x80 nanoslp syz-executor 73767 384648 71996 0 3 0x4000080 kqread syz-executor 73767 485275 71996 0 3 0x4000080 kqsel syz-executor 73767 18646 71996 0 3 0x4000080 fifor syz-executor 73767 47335 71996 0 3 0x4000080 fsleep syz-executor 95651 149347 63808 0 3 0x3000 suspend syz-executor 95651 149801 63808 0 2 0x4081000 syz-executor 95651 361910 63808 0 3 0x4081000 inode syz-executor 95651 191916 63808 0 3 0x4081000 inode syz-executor 95941 118278 20437 0 3 0x82 nanoslp syz-executor 57674 236365 1 0 3 0x100083 ttyin getty 63808 303551 20437 0 3 0x82 nanoslp syz-executor 75053 224521 0 0 3 0x14200 bored sosplice 71996 185164 20437 0 3 0x82 nanoslp syz-executor 35676 124801 20437 0 3 0x82 nanoslp syz-executor 46562 199319 20437 0 3 0x82 nanoslp syz-executor 10842 49172 20437 0 3 0x82 nanoslp syz-executor 28068 147971 20437 0 3 0x2 biowait syz-executor 43971 262372 20437 0 3 0x82 nanoslp syz-executor 20437 314678 14020 0 3 0x82 kqread syz-executor 14020 134082 42973 0 3 0x10008a sigsusp ksh 42973 198807 96073 0 3 0x98 kqread sshd-session 96073 145316 35079 0 3 0x92 kqread sshd-session 35079 160389 1 0 3 0x88 kqread sshd 3619 224797 2896 74 3 0x1100092 bpf pflogd 2896 56832 1 0 3 0x80 sbwait pflogd 85095 300925 6713 73 3 0x1100090 kqread syslogd 6713 488393 1 0 3 0x100082 sbwait syslogd 64817 46247 1 0 3 0x100080 kqread resolvd 79432 277116 18831 77 3 0x100092 kqread dhcpleased 77225 518396 18831 77 3 0x100092 kqread dhcpleased 18831 117042 1 0 3 0x80 kqread dhcpleased 67049 164986 0 0 3 0x14200 bored smr 28419 492624 0 0 2 0x14200 zerothread 57978 87756 0 0 3 0x14200 aiodoned aiodoned 19519 416436 0 0 3 0x14200 syncer update 24908 2850 0 0 3 0x14200 cleaner cleaner 8496 509515 0 0 2 0x14200 reaper 16036 359818 0 0 3 0x14200 pgdaemon pagedaemon 80678 418534 0 0 3 0x14200 bored viomb 33996 481860 0 0 3 0x40014200 acpi0 acpi0 77549 111072 0 0 3 0x40014200 idle1 81675 95376 0 0 3 0x14200 bored softnet7 10557 72949 0 0 3 0x14200 bored softnet6 70824 361125 0 0 3 0x14200 bored softnet5 34686 150313 0 0 3 0x14200 bored softnet4 51801 457667 0 0 3 0x14200 bored softnet3 19486 48768 0 0 3 0x14200 bored softnet2 69182 48034 0 0 3 0x14200 bored softnet1 7977 35104 0 0 2 0x14200 softnet0 13361 513964 0 0 3 0x14200 bored systqmp 41511 424100 0 0 3 0x14200 bored systq 3526 22597 0 0 3 0x14200 tmoslp softclockmp 13577 388546 0 0 3 0x40014200 tmoslp softclock 46760 203166 0 0 3 0x40014200 idle0 1 180157 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &map->flags_lock r = 0 (0xffffffff839dc838) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5169 #4 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #5 km_free+0x87 sys/uvm/uvm_km.c:831 #6 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #7 reaper+0x1cb sys/kern/kern_exit.c:493 #8 proc_trampoline+0x10 Process 95651 (syz-executor) thread 0xffff80002a2d4a80 (149801) Process 95651 (syz-executor) thread 0xffff80002a2d5c70 (191916) Process 28068 (syz-executor) thread 0xffff80002a2a9c48 (147971) Process 8496 (reaper) thread 0xffff8000ffffc298 (509515) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11063K 11831K 166960K 13355 0 pcb 20 16K 17K 166960K 465 0 rtable 172 10K 10K 166960K 456 0 pf 42 19K 67487K 166960K 166 0 ifaddr 33 5K 8K 166960K 112 0 ifgroup 51 2K 3K 166960K 187 0 sysctl 3 1K 9K 166960K 10 0 counters 66 36K 38K 166960K 278 0 ioctlops 0 0K 4K 166960K 1894 0 iov 0 0K 28K 166960K 84 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1461 92K 92K 166960K 2674 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 55 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1385 0 sigio 0 0K 0K 166960K 39 0 proc 72 115K 164K 166960K 740 0 subproc 72 4K 4K 166960K 94 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 253 0 in_multi 66 4K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 10 0 mrt 3 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 625 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 236 151K 168K 166960K 14671 0 UVM aobj 28 4K 4K 166960K 32 0 pinsyscall 42 84K 103K 166960K 2516 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 58 0 NDP 11 0K 2K 166960K 75 0 temp 81 8684K 8812K 166960K 69759 0 kqueue 14 22K 30K 166960K 290 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 119 0 116 1 0 1 1 0 8 0 rtentry 176 155 0 92 5 0 5 5 0 8 0 unpcb 144 926 0 902 8 6 2 4 0 8 0 syncache 336 6 0 6 3 3 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 440 0 434 13 12 1 7 0 8 0 arp 128 20 0 13 1 0 1 1 0 8 0 inpcb 328 1590 0 1577 13 6 7 8 0 8 5 nd6 144 25 0 11 1 0 1 1 0 8 0 pkpcb 40 39 0 38 2 1 1 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 89 0 89 2 1 1 1 0 8 1 pppxif 1504 9 0 9 4 3 1 1 0 8 1 pfstscr 40 4 0 3 2 1 1 1 0 8 0 pffrag 232 6 0 0 1 0 1 1 0 482 0 pffrnode 88 5 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 1 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 90 0 32 1 0 1 1 0 8 0 pfstkey 128 94 0 36 2 0 2 2 0 8 0 pfstate 384 91 0 34 6 0 6 6 0 8 0 pfrule 1344 27 0 20 2 1 1 2 0 8 0 rttmr 136 2 0 1 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 677 0 369 31 11 20 29 0 8 0 art_table 40 679 0 369 5 0 5 5 0 8 0 art_node 32 154 0 98 1 0 1 1 0 8 0 sysvmsgpl 40 25 0 16 2 1 1 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 29 0 4 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4066 0 2559 95 0 95 95 0 8 0 ffsino 296 4066 0 2559 117 0 117 117 0 8 0 nchpl 144 6014 0 4325 64 0 64 64 0 8 0 rtmask 32 12 0 12 2 2 0 1 0 8 0 uvmvnodes 80 4832 0 0 99 0 99 99 0 8 0 vnodes 216 4832 0 0 269 0 269 269 0 8 0 namei 1024 21107 0 21105 3 2 1 2 0 8 0 percpumem 16 154 0 106 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 114 0 88 4 1 3 3 0 8 1 scsiplug 72 5 0 5 3 2 1 1 0 8 1 scxspl 216 25460 0 25459 10 9 1 8 1 8 0 plimitpl 152 328 0 310 1 0 1 1 0 8 0 sigapl 424 1699 0 1644 9 2 7 9 0 8 0 knotepl 120 550 0 0 16 0 16 16 0 8 0 kqueuepl 224 539 0 527 6 1 5 5 0 8 4 pipepl 344 239 0 212 3 0 3 3 0 8 0 fdescpl 528 1651 0 1620 3 0 3 3 0 8 0 filepl 160 10734 0 10510 20 6 14 15 0 8 1 lockfpl 104 530 0 528 1 0 1 1 0 8 0 lockfspl 48 235 0 233 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 97 0 80 1 0 1 1 0 8 0 ucredpl 104 1783 0 1770 1 0 1 1 0 8 0 zombiepl 144 2430 0 2428 1 0 1 1 0 8 0 processpl 1248 1699 0 1644 6 0 6 6 0 8 0 procpl 656 3928 0 3862 9 2 7 8 0 8 0 sosppl 168 10 0 10 3 2 1 1 0 8 1 sockpl 752 2737 0 2696 24 12 12 13 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 99 0 0 3 0 3 3 0 8 0 mbufpl 256 1241 0 0 78 0 78 78 0 8 0 bufpl 280 9217 0 3074 439 0 439 439 0 8 0 anonpl 32 9958 0 0 81 0 81 81 0 246 0 amapchunkpl 152 48633 0 48151 42 11 31 35 0 158 8 amappl16 200 5337 0 5183 38 26 12 21 0 8 3 amappl15 192 2 0 2 2 2 0 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 2324 0 2294 4 1 3 3 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 17 0 17 2 1 1 1 0 8 1 amappl9 144 248 0 247 2 1 1 1 0 8 0 amappl8 136 28 0 26 1 0 1 1 0 8 0 amappl7 128 114 0 102 1 0 1 1 0 8 0 amappl6 120 213 0 209 1 0 1 1 0 8 0 amappl5 112 134 0 124 1 0 1 1 0 8 0 amappl4 104 301 0 283 1 0 1 1 0 8 0 amappl3 96 9856 0 9746 5 1 4 4 0 8 0 amappl2 88 686 0 622 2 0 2 2 0 8 0 amappl1 80 13768 0 13173 15 1 14 14 0 8 0 amappl 88 13744 0 13579 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 255 0 255 3 2 1 1 0 8 1 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 72 31 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1651 0 1620 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1651 0 1620 1 0 1 1 0 8 0 vmmpekpl 168 14999 0 14953 3 0 3 3 0 8 0 vmmpepl 168 108519 0 106411 117 16 101 105 0 357 6 vmsppl 488 1650 0 1620 6 1 5 5 0 8 0 rwobjpl 80 34839 0 28925 122 0 122 122 0 8 0 pdppl 4096 3309 0 3240 107 36 71 85 0 8 2 pvpl 32 18671 0 0 151 0 151 151 0 265 0 pmappl 256 1650 0 1620 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 365 0 68 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83825ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838de7e8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838de7e8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003800a7c0,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f db_putchar(ffffffff8340f420) at db_putchar db_printf(ffffffff8340f420) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b24cd) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003800ab70,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003800ab70) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001515000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 end trace frame: 0xffff80003800aca0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83825ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff838de7e8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838de7e8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003800a7c0,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f db_putchar(ffffffff8340f420) at db_putchar db_printf(ffffffff8340f420) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833b24cd) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003800ab70,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:294 kerntrap(ffff80003800ab70) at kerntrap+0x13c sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001515000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,81,2000,ffff800034bf8a60) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff800034bf8a60) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003800ad20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807bd2dce0,81,fffffd80097fb2d8,ffff800034bf8a60) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80693073a0,ffff800034bf8a60) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80693073a0,ffff800034bf8a60) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80693073a0,ffff800034bf8a60) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd80693073a0,ffff800034bf8a60) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff800034bf8a60) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff800034bf8a60,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff800034bf8a60,ffff80003800b090,ffff80003800afe0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003800b090) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003800b090) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ef9b3b72bd0, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7031cefaa990, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7031cefaa990, count: -1