*cpu0: uvm_fault(0xfffffd806ebd4788, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xe08d98818a0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800039c459d0 rbx 0 rdx 0xffff80000145bb80 rcx 0xffff80003c43b9d8 rax 0x2a r8 0xffff800039c45900 r9 0 r10 0xaffb0c4caa7c8c6c r11 0xbf249d565f82bfb8 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81b3f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800039c45950 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=462272 pid=14131 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c43af98,0xffff80003c42f750 process=0xffff80002a395c18 user=0xffff800039c40000, vmspace=0xfffffd806ebd4008 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21819 285983 24146 0 2 0 syz-executor 21819 190073 24146 0 3 0x4000080 fsleep syz-executor 14131 205086 64564 0 2 0 syz-executor *14131 462272 64564 0 7 0x4000000 syz-executor 91847 486301 61017 0 2 0 syz-executor 91847 375577 61017 0 3 0x4000080 fsleep syz-executor 91847 418241 61017 0 3 0x4000080 fsleep syz-executor 14117 490292 32602 0 2 0 syz-executor 14117 515810 32602 0 3 0x4000080 lockf syz-executor 14117 144432 32602 0 3 0x4000080 fsleep syz-executor 93571 134345 53093 0 2 0 syz-executor 93571 263285 53093 0 3 0x4000080 kqsel syz-executor 93571 398200 53093 0 3 0x4000080 fsleep syz-executor 94911 75827 77367 0 3 0x80 nanoslp syz-executor 94911 343472 77367 0 3 0x4000080 kqsel syz-executor 94911 292475 77367 0 3 0x4000080 fsleep syz-executor 94911 43619 77367 0 3 0x4000080 fsleep syz-executor 77367 65650 79421 0 3 0x82 nanoslp syz-executor 53093 226317 79421 0 3 0x82 nanoslp syz-executor 14690 297110 79421 0 3 0x82 nanoslp syz-executor 24146 265320 79421 0 3 0x82 nanoslp syz-executor 61017 54708 79421 0 3 0x82 nanoslp syz-executor 24553 386773 79421 0 2 0x2 syz-executor 4922 299849 1 0 3 0x100083 ttyin getty 32602 460086 79421 0 3 0x82 nanoslp syz-executor 7726 32665 0 0 3 0x14200 bored sosplice 5625 311872 94748 0 3 0x100082 sbwait arp 94748 266417 1 0 3 0x10008a sigsusp sh 64564 20417 79421 0 3 0x82 nanoslp syz-executor 79421 517124 88042 0 3 0x82 kqread syz-executor 88042 312932 14677 0 3 0x10008a sigsusp ksh 14677 384830 64268 0 3 0x98 kqread sshd-session 64268 210572 74691 0 3 0x92 kqread sshd-session 74691 154002 1 0 3 0x88 kqread sshd 63681 493701 35261 74 3 0x1100092 bpf pflogd 35261 33360 1 0 3 0x80 sbwait pflogd 69089 204295 89431 73 3 0x1100090 kqread syslogd 89431 16402 1 0 3 0x100082 sbwait syslogd 5991 327011 1 0 3 0x100080 kqread resolvd 82977 444221 49319 77 3 0x100092 kqread dhcpleased 67281 160600 49319 77 3 0x100092 kqread dhcpleased 49319 564 1 0 3 0x80 kqread dhcpleased 9200 158545 0 0 3 0x14200 bored smr 77365 85823 0 0 2 0x14200 zerothread 74961 209291 0 0 3 0x14200 aiodoned aiodoned 18424 249705 0 0 3 0x14200 syncer update 82546 454571 0 0 3 0x14200 cleaner cleaner 36198 137798 0 0 3 0x14200 reaper reaper 30933 347154 0 0 3 0x14200 pgdaemon pagedaemon 17259 3343 0 0 3 0x14200 bored viomb 81496 399288 0 0 3 0x40014200 acpi0 acpi0 59672 72700 0 0 3 0x40014200 idle1 90229 332908 0 0 3 0x14200 bored softnet3 48985 249200 0 0 3 0x14200 bored softnet2 40396 64806 0 0 3 0x14200 bored softnet1 73732 5881 0 0 3 0x14200 bored softnet0 39077 143831 0 0 3 0x14200 bored systqmp 2899 58951 0 0 3 0x14200 bored systq 42644 144007 0 0 3 0x14200 tmoslp softclockmp 50234 410813 0 0 3 0x40014200 tmoslp softclock 78408 410734 0 0 3 0x40014200 idle0 1 129512 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd800916fee0) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x50e pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1094 [inline] #3 pmap_enter+0x50e sys/arch/amd64/amd64/pmap.c:2881 #4 uvm_fault_lower+0x703 sys/uvm/uvm_fault.c:1480 #5 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806bd00a10) #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+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_lower+0x703 sys/uvm/uvm_fault.c:1480 #5 uvm_fault+0x272 sys/uvm/uvm_fault.c:-1 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 14131 (syz-executor) thread 0xffff80003c43b9d8 (462272) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 11136K 13117K 166960K 17783 0 pcb 18 15K 16K 166960K 607 0 rtable 240 12K 12K 166960K 1425 0 pf 34 17K 18K 166960K 274 0 ifaddr 42 8K 9K 166960K 243 0 ifgroup 55 2K 2K 166960K 403 0 sysctl 4 1K 2K 166960K 11 0 counters 64 36K 37K 166960K 378 0 ioctlops 0 0K 4K 166960K 2196 0 iov 0 0K 24K 166960K 325 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1556 98K 98K 166960K 4778 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 24K 166960K 52 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 221 0 dirhash 15 2K 3K 166960K 84 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 20 73K 114K 166960K 4269 0 sigio 0 0K 0K 166960K 120 0 proc 73 91K 128K 166960K 1520 0 subproc 81 5K 5K 166960K 254 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 670 0 in_multi 91 6K 7K 166960K 447 0 ether_multi 1 0K 0K 166960K 31 0 mrt 2 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 1395 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 265 162K 181K 166960K 38752 0 UVM aobj 18 2K 4K 166960K 25 0 pinsyscall 46 92K 104K 166960K 5950 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 218 0 NDP 12 0K 1K 166960K 170 0 temp 80 8692K 8820K 166960K 124136 0 kqueue 14 22K 30K 166960K 580 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 120 464 0 460 3 2 1 2 0 8 0 rtentry 176 429 0 328 6 1 5 6 0 8 0 unpcb 144 2897 0 2878 15 10 5 6 0 8 4 syncache 336 20 0 20 6 5 1 1 0 8 1 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 808 1272 0 1264 22 14 8 8 0 8 7 arp 128 76 0 53 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 384 4050 0 4036 34 25 9 9 0 8 7 nd6 144 99 0 75 1 0 1 1 0 8 0 pkpcb 40 38 0 38 2 1 1 1 0 8 1 kcovpl 48 28 0 19 1 0 1 1 0 8 0 mppekey 1024 4 0 4 3 2 1 1 0 8 1 ppxss 1192 98 0 98 4 3 1 1 0 8 1 pppxif 1504 24 0 24 5 4 1 1 0 8 1 pffrag 232 37 0 24 1 0 1 1 0 482 0 pffrnode 88 36 0 24 1 0 1 1 0 8 0 pffrent 40 137 0 124 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 pfstitem 24 173 0 84 1 0 1 1 0 8 0 pfstkey 128 173 0 84 4 0 4 4 0 8 0 pfstate 384 173 0 84 10 0 10 10 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1723 0 1290 39 11 28 32 0 8 0 art_table 32 1726 0 1290 5 1 4 5 0 8 0 art_node 16 412 0 327 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 13 1 0 1 1 0 8 0 semupl 112 4 0 4 3 2 1 1 0 8 1 semapl 112 211 0 201 1 0 1 1 0 8 0 shmpl 112 22 0 7 1 0 1 1 0 8 0 dirhash 1024 65 0 46 3 0 3 3 0 8 0 dino2pl 256 8780 0 7231 98 0 98 98 0 8 0 ffsino 288 8780 0 7231 111 0 111 111 0 8 0 nchpl 144 14387 0 12638 65 0 65 65 0 8 0 rtmask 32 13 0 13 7 6 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 53559 0 53559 5 4 1 2 0 8 1 percpumem 16 204 0 157 1 0 1 1 0 8 0 kstatmem 264 228 0 204 3 1 2 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 11 0 11 5 4 1 1 0 8 1 scxspl 216 41634 0 41634 19 16 3 8 1 8 3 plimitpl 152 969 0 951 1 0 1 1 0 8 0 sigapl 424 4557 0 4504 9 1 8 9 0 8 0 futexpl 64 57754 0 57747 1 0 1 1 0 8 0 knotepl 120 774 0 0 24 0 24 24 0 8 0 kqueuepl 224 1480 0 1467 14 9 5 5 0 8 4 pipepl 336 653 0 623 13 10 3 8 0 8 0 fdescpl 520 4510 0 4476 3 0 3 3 0 8 0 filepl 160 29480 0 29237 43 25 18 20 0 8 6 lockfpl 104 1365 0 1358 2 1 1 2 0 8 0 lockfspl 48 444 0 439 1 0 1 1 0 8 0 sessionpl 144 59 0 50 1 0 1 1 0 8 0 pgrppl 48 158 0 140 1 0 1 1 0 8 0 ucredpl 104 5752 0 5738 1 0 1 1 0 8 0 zombiepl 144 4506 0 4504 1 0 1 1 0 8 0 processpl 1192 4557 0 4504 6 0 6 6 0 8 0 procpl 656 10649 0 10585 8 0 8 8 0 8 0 srpgc 96 45 0 45 4 3 1 1 0 8 1 sosppl 168 22 0 22 6 5 1 1 0 8 1 sockpl 728 7490 0 7453 44 33 11 16 0 8 7 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 10 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 90 0 0 11 0 11 11 0 8 0 mtagpl 96 189 0 0 5 0 5 5 0 8 0 mbufpl 256 641 0 0 39 0 39 39 0 8 0 bufpl 280 11845 0 5703 440 1 439 440 0 8 0 anonpl 32 10230 0 0 83 1 82 82 0 246 0 amapchunkpl 152 128960 0 128412 53 28 25 34 0 158 2 amappl16 200 9977 0 9944 73 60 13 16 0 8 8 amappl15 192 3 0 3 2 2 0 1 0 8 0 amappl14 184 187 0 174 1 0 1 1 0 8 0 amappl13 176 21 0 21 6 5 1 1 0 8 1 amappl12 168 5498 0 5463 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 6 0 6 3 3 0 1 0 8 0 amappl9 144 261 0 261 1 1 0 1 0 8 0 amappl8 136 36 0 33 1 0 1 1 0 8 0 amappl7 128 170 0 156 1 0 1 1 0 8 0 amappl6 120 399 0 394 1 0 1 1 0 8 0 amappl5 112 212 0 202 1 0 1 1 0 8 0 amappl4 104 484 0 462 1 0 1 1 0 8 0 amappl3 96 27547 0 27421 6 2 4 4 0 8 0 amappl2 88 1045 0 977 2 0 2 2 0 8 0 amappl1 80 29241 0 28603 16 0 16 16 0 8 0 amappl 88 36782 0 36596 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma512 512 2 0 2 2 1 1 1 0 8 1 dma256 256 10 0 10 4 4 0 1 0 8 0 dma128 128 257 0 257 5 5 0 1 0 8 0 dma64 64 8 0 8 3 2 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 24 0 7 1 0 1 1 0 8 0 uaddrrnd 24 4510 0 4476 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4510 0 4476 1 0 1 1 0 8 0 vmmpekpl 168 33560 0 33499 4 0 4 4 0 8 0 vmmpepl 168 279527 0 277344 130 25 105 107 0 357 4 vmsppl 480 4509 0 4476 5 0 5 5 0 8 0 rwobjpl 72 71727 0 64779 136 5 131 132 0 8 1 pdppl 4096 9027 0 8952 139 64 75 83 0 8 0 pvpl 32 19405 0 0 157 1 156 156 0 265 0 pmappl 256 4509 0 4476 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 528 0 117 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83869ff0) 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 x86_bus_space_io_write_1(3f8,0,d) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,d) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,d) at comcnputc+0x1ab sys/dev/ic/com.c:1263 db_putchar(a) at db_putchar+0x774 sys/ddb/db_output.c:168 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff833fa50d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a131e) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff800039c33a10,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff800039c33a10) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001597000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c42ef90) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c42ef90) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff800039c33bb0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83869ff0) 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 x86_bus_space_io_write_1(3f8,0,d) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,d) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,d) at comcnputc+0x1ab sys/dev/ic/com.c:1263 db_putchar(a) at db_putchar+0x774 sys/ddb/db_output.c:168 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff833fa50d) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833a131e) at fault+0xa7 sys/arch/amd64/amd64/trap.c:157 kpageflttrap(ffff800039c33a10,0) at kpageflttrap+0x385 sys/arch/amd64/amd64/trap.c:290 kerntrap(ffff800039c33a10) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001597000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c42ef90) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c42ef90) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800039c33bc0) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd807156d438,81,fffffd807f7d3680,ffff80003c42ef90) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c228c98,ffff80003c42ef90) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c228c98,ffff80003c42ef90) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c228c98,ffff80003c42ef90) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd806c228c98,ffff80003c42ef90) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff80003c42ef90) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff80003c42ef90,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c42ef90,ffff800039c33f30,ffff800039c33e80) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800039c33f30) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039c33f30) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dd04ec93f60, count: -24 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xe08d98818a0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xe08d98818a0, count: -1