*cpu1: uvm_fault(0xfffffd805fa74b98, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x767cd00749a0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2eac90 rbx 0 rdx 0 rcx 0xffff8000fffe9778 rax 0x3b r8 0xffff80002a2eabc0 r9 0 r10 0x66246c88a1f8c791 r11 0xccb2f5880f915e8a r12 0 r13 0 r14 0xffff8000fffe9778 r15 0 rip 0xffffffff82a443ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2eac10 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=175892 pid=89701 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe8020,0xffff80002a2602c0 process=0xffff8000fffe7510 user=0xffff80002a2e5000, vmspace=0xfffffd805fa74210 estcpu=36, cpticks=104, pctcpu=0.37, user=4, sys=98, intr=2 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14080 44363 12392 0 2 0 syz-executor 65160 175332 98593 0 2 0 syz-executor 65160 352255 98593 0 3 0x4000080 fsleep syz-executor 65160 288682 98593 0 2 0x4000000 syz-executor 22960 245096 89701 0 2 0 syz-executor 22960 229388 89701 0 3 0x4000080 sbwait syz-executor 22960 198117 89701 0 2 0x4000000 syz-executor 24435 102458 46588 0 2 0 syz-executor 24435 495405 46588 0 2 0x4000000 syz-executor 94654 262063 5949 0 2 0 syz-executor 94654 8510 5949 0 3 0x4000080 fsleep syz-executor 78841 475261 73112 0 2 0 syz-executor 78841 442952 73112 0 2 0x4000000 syz-executor 78841 11833 73112 0 3 0x4000080 fsleep syz-executor 90565 98598 33134 0 2 0 syz-executor 90565 36612 33134 0 3 0x4000080 fsleep syz-executor 90565 63466 33134 0 3 0x4000080 fsleep syz-executor 90565 169975 33134 0 3 0x4000080 fsleep syz-executor 90565 379472 33134 0 3 0x4000080 fsleep syz-executor 90565 376571 33134 0 3 0x4000080 fsleep syz-executor 90565 425511 33134 0 3 0x4000080 fsleep syz-executor 73112 461894 79101 0 2 0x2 syz-executor 12392 169449 79101 0 2 0xc82 syz-executor 85097 57693 1 0 3 0x100083 ttyin getty 33134 3196 79101 0 3 0x82 nanoslp syz-executor *89701 175892 79101 0 7 0x2 syz-executor 20933 452909 79101 0 2 0xc82 syz-executor 98593 480829 79101 0 3 0x82 nanoslp syz-executor 46588 476198 79101 0 2 0xc82 syz-executor 5949 345015 79101 0 3 0x82 nanoslp syz-executor 79101 424659 23120 0 3 0x82 kqread syz-executor 23120 521593 2986 0 3 0x10008a sigsusp ksh 2986 304098 79618 0 3 0x98 kqread sshd-session 79618 315293 97155 0 3 0x92 kqread sshd-session 97155 492529 1 0 3 0x88 kqread sshd 89553 342364 1835 74 3 0x1100092 bpf pflogd 1835 177093 1 0 3 0x80 sbwait pflogd 23493 76261 81024 73 3 0x1100090 kqread syslogd 81024 443191 1 0 3 0x100082 sbwait syslogd 5091 115712 1 0 3 0x100080 kqread resolvd 56445 131098 15063 77 3 0x100092 kqread dhcpleased 76956 116125 15063 77 3 0x100092 kqread dhcpleased 15063 470709 1 0 3 0x80 kqread dhcpleased 10058 245598 0 0 3 0x14200 bored smr 4734 510281 0 0 2 0x14200 zerothread 20149 179626 0 0 3 0x14200 aiodoned aiodoned 40390 222522 0 0 3 0x14200 syncer update 8314 204823 0 0 3 0x14200 cleaner cleaner 59252 445644 0 0 2 0x14200 reaper 29871 433514 0 0 3 0x14200 pgdaemon pagedaemon 88795 90132 0 0 3 0x14200 bored viomb 90208 365851 0 0 3 0x40014200 acpi0 acpi0 15086 205010 0 0 3 0x40014200 idle1 3151 469813 0 0 3 0x14200 bored softnet1 29408 221912 0 0 3 0x14200 bored softnet0 64905 155668 0 0 3 0x14200 bored systqmp 95716 402428 0 0 3 0x14200 bored systq 8069 374592 0 0 3 0x14200 tmoslp softclockmp 20605 449899 0 0 3 0x40014200 tmoslp softclock 40799 199688 0 0 3 0x40014200 idle0 1 126438 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff839e0580) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 yield+0x35 sys/kern/sched_bsd.c:321 #3 pool_get+0x27e sys/kern/subr_pool.c:591 #4 uvm_mapent_alloc+0x3a4 sys/uvm/uvm_map.c:-1 #5 uvm_map_clip_start+0xde sys/uvm/uvm_map.c:4537 #6 uvm_unmap_remove+0x4fd sys/uvm/uvm_map.c:-1 #7 uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] #7 uvm_unmap+0xa7 sys/uvm/uvm_map.c:1793 #8 km_free+0x87 sys/uvm/uvm_km.c:714 #9 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #10 reaper+0x1ca sys/kern/kern_exit.c:493 #11 proc_trampoline+0x10 Process 65160 (syz-executor) thread 0xffff80002a260d10 (288682) Process 59252 (reaper) thread 0xffff8000ffffdc90 (445644) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11121 12154K 12965K 166960K 16736 0 pcb 17 20K 23K 166960K 918 0 rtable 194 12K 12K 166960K 997 0 pf 36 18K 82K 166960K 324 0 ifaddr 32 5K 7K 166960K 215 0 ifgroup 58 2K 3K 166960K 393 0 sysctl 4 1K 9K 166960K 36 0 counters 70 37K 38K 166960K 488 0 ioctlops 1 4K 4K 166960K 2319 0 iov 1 8K 24K 166960K 443 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1479 93K 94K 166960K 4783 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 336 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 3265 0 sigio 0 0K 0K 166960K 195 0 proc 72 115K 163K 166960K 1205 0 subproc 72 4K 4K 166960K 155 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 469 0 in_multi 55 4K 7K 166960K 306 0 ether_multi 1 0K 0K 166960K 27 0 mrt 0 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 289 1288K 1288K 166960K 289 0 exec 0 0K 1K 166960K 938 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 269 160K 178K 166960K 31157 0 UVM aobj 86 146K 146K 166960K 94 0 pinsyscall 43 86K 98K 166960K 4655 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 266 0 NDP 12 0K 2K 166960K 163 0 temp 82 8680K 8787K 166960K 151398 0 kqueue 13 20K 30K 166960K 647 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> 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 120 337 0 334 3 0 3 3 0 8 2 rtentry 176 267 0 201 6 1 5 6 0 8 0 unpcb 144 2238 0 2215 13 11 2 4 0 8 1 syncache 336 21 0 21 7 6 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 1106 0 1101 23 16 7 7 0 8 6 arp 136 41 0 29 1 0 1 1 0 8 0 inpcb 328 3819 0 3810 41 34 7 13 0 8 5 nd6 152 57 0 44 1 0 1 1 0 8 0 pkpcb 40 22 0 22 6 5 1 1 0 8 1 kcovpl 48 17 0 9 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 170 0 170 4 3 1 1 0 8 1 pppxif 1504 15 0 15 6 5 1 1 0 8 1 pffrag 232 20 0 10 1 0 1 1 0 482 0 pffrnode 88 18 0 8 1 0 1 1 0 8 0 pffrent 40 37 0 27 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 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 176 0 90 1 0 1 1 0 8 0 pfstkey 128 176 0 90 4 0 4 4 0 8 0 pfstate 448 176 0 90 11 0 11 11 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1195 0 910 33 14 19 29 0 8 1 art_table 40 1199 0 910 6 2 4 5 0 8 0 art_node 32 265 0 209 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 297 0 287 1 0 1 1 0 8 0 shmpl 112 14 0 3 1 0 1 1 0 8 0 dirhash 1024 48 0 31 3 0 3 3 0 8 0 dino2pl 256 8050 0 6532 96 0 96 96 0 8 0 ffsino 296 8050 0 6532 118 0 118 118 0 8 0 nchpl 144 12618 0 10896 65 0 65 65 0 8 0 rtmask 32 25 0 25 6 5 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 45704 0 45704 5 4 1 3 0 8 1 percpumem 16 259 0 209 1 0 1 1 0 8 0 vcpupl 3968 73 0 1 9 0 9 9 0 8 0 vmpool 848 77 0 5 8 0 8 8 0 8 0 kstatmem 264 260 0 230 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 14 0 14 5 5 0 1 0 8 0 scxspl 216 94362 0 94362 18 16 2 8 1 8 2 plimitpl 152 919 0 900 1 0 1 1 0 8 0 sigapl 424 3549 0 3501 6 0 6 6 0 8 0 knotepl 120 809 0 0 24 0 24 24 0 8 0 kqueuepl 224 1498 0 1489 19 14 5 5 0 8 4 pipepl 344 647 0 619 11 5 6 9 0 8 2 fdescpl 528 3520 0 3488 3 0 3 3 0 8 0 filepl 160 27053 0 26825 38 23 15 21 0 8 2 lockfpl 104 1534 0 1532 3 2 1 2 0 8 0 lockfspl 48 509 0 507 1 0 1 1 0 8 0 sessionpl 144 45 0 36 1 0 1 1 0 8 0 pgrppl 48 127 0 110 1 0 1 1 0 8 0 ucredpl 104 5489 0 5476 1 0 1 1 0 8 0 zombiepl 144 3988 0 3987 2 1 1 1 0 8 0 processpl 1232 3549 0 3501 5 1 4 5 0 8 0 procpl 664 8802 0 8738 6 0 6 6 0 8 0 sosppl 176 32 0 32 6 5 1 1 0 8 1 sockpl 752 6521 0 6486 61 50 11 23 0 8 7 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 50 0 0 6 0 6 6 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 1212 0 0 74 0 74 74 0 8 0 bufpl 280 37783 0 31647 439 0 439 439 0 8 0 anonpl 32 15292 0 0 124 1 123 123 0 246 0 amapchunkpl 152 107178 0 106530 58 26 32 35 0 158 2 amappl16 200 13623 0 13490 82 65 17 36 0 8 1 amappl15 192 41 0 41 2 2 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 584 0 583 1 0 1 1 0 8 0 amappl12 168 3987 0 3944 3 0 3 3 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 50 0 36 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 34 0 30 1 0 1 1 0 8 0 amappl7 128 115 0 114 1 0 1 1 0 8 0 amappl6 120 402 0 388 1 0 1 1 0 8 0 amappl5 112 84 0 73 1 0 1 1 0 8 0 amappl4 104 523 0 490 1 0 1 1 0 8 0 amappl3 96 22043 0 21923 5 1 4 4 0 8 0 amappl2 88 697 0 633 2 0 2 2 0 8 0 amappl1 80 24934 0 24341 15 1 14 14 0 8 0 amappl 88 29703 0 29512 6 1 5 5 0 92 0 uvmvnodes 80 196 0 0 4 0 4 4 0 8 0 dma65536 65536 2 0 2 2 1 1 1 0 8 1 dma32768 32768 2 0 2 2 2 0 1 0 8 0 dma16384 16384 2 0 2 2 1 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 71 0 71 2 2 0 1 0 8 0 dma128 128 256 0 256 4 4 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 93 0 8 2 0 2 2 0 8 0 uaddrrnd 24 3520 0 3488 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3520 0 3488 1 0 1 1 0 8 0 vmmpekpl 168 29736 0 29685 3 0 3 3 0 8 0 vmmpepl 168 230261 0 228134 142 40 102 114 0 357 4 vmsppl 488 3519 0 3488 6 1 5 5 0 8 0 rwobjpl 80 60957 0 59602 44 7 37 38 0 8 0 pdppl 4096 7201 0 7058 193 50 143 145 0 8 0 pvpl 32 23176 0 0 187 0 187 187 0 265 0 pmappl 256 3596 0 3493 7 0 7 7 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 497 0 102 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x767cd00749a0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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(3f8,0,61) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,61) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,61) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 printf(ffffffff83460296) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c4070a0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:653 kerntrap(ffff80003c4070a0) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:516 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001797000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c401a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c401a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 end trace frame: 0xffff80003c407240, count: 0 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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(3f8,0,61) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,61) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,61) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 kputchar(61,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 printf(ffffffff83460296) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80003c4070a0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:653 kerntrap(ffff80003c4070a0) at kerntrap+0x2e6 sys/arch/amd64/amd64/trap.c:516 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001797000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,81,2000,ffff80003c401a18) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c401a18) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c407250) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806b6152b8,81,fffffd80097fd5b0,ffff80003c401a18) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806d7ed5b8,ffff80003c401a18) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806d7ed5b8,ffff80003c401a18) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806d7ed5b8,ffff80003c401a18) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806d7ed5b8,ffff80003c401a18) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c401a18) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c401a18,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c401a18,ffff80003c4075c0,ffff80003c407510) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4075c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4075c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7713f0bc1cb0, count: -24