*cpu1: uvm_fault(0xfffffd806bd85b60, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x76380c26b4e0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c459c80 rbx 0 rdx 0 rcx 0xffff80003c426028 rax 0x3b r8 0xffff80003c459bb0 r9 0xfffffd807f7d3410 r10 0xeade35119d8393af r11 0xb94a74abc50c2967 r12 0 r13 0 r14 0xffff80003c426028 r15 0 rip 0xffffffff825fe3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c459c00 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (sh) tid=328719 pid=99378 tcnt=1 stat=onproc flags process=100002 proc=0 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4274a8,0xffff80003c427748 process=0xffff8000303d8e48 user=0xffff80003c454000, vmspace=0xfffffd806bd85980 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69467 353725 94461 0 2 0 syz-executor 69467 15679 94461 0 3 0x4000080 fsleep syz-executor 89857 33140 70121 0 2 0 syz-executor 89857 40444 70121 0 3 0x4000080 ttyopn syz-executor 89857 48468 70121 0 3 0x4000080 fsleep syz-executor *99378 328719 22678 0 7 0x100002 sh 23248 466027 69020 0 2 0 syz-executor 23248 143295 69020 0 3 0x4000080 fsleep syz-executor 23248 173851 69020 0 3 0x4000080 fsleep syz-executor 22678 290201 11597 0 3 0x82 wait syz-executor 94461 151424 11597 0 3 0x82 nanoslp syz-executor 94142 501761 0 0 3 0x14200 acct acct 26434 267427 11597 0 3 0x82 piperd syz-executor 40815 264123 0 0 3 0x14280 nfsidl nfsio 92834 205446 0 0 3 0x14280 nfsidl nfsio 67510 270871 0 0 3 0x14280 nfsidl nfsio 87895 434204 0 0 3 0x14280 nfsidl nfsio 56386 12977 0 0 3 0x14280 nfsidl nfsio 2454 460954 0 0 3 0x14280 nfsidl nfsio 37457 369670 0 0 3 0x14280 nfsidl nfsio 83165 206358 0 0 3 0x14280 nfsidl nfsio 62829 74482 0 0 3 0x14280 nfsidl nfsio 38909 61627 0 0 3 0x14280 nfsidl nfsio 61223 377828 0 0 3 0x14280 nfsidl nfsio 1214 287893 0 0 3 0x14280 nfsidl nfsio 7584 263510 0 0 3 0x14280 nfsidl nfsio 57263 337044 0 0 3 0x14280 nfsidl nfsio 71881 345597 0 0 3 0x14280 nfsidl nfsio 85564 117345 0 0 3 0x14280 nfsidl nfsio 44307 26864 0 0 3 0x14280 nfsidl nfsio 76123 325164 0 0 3 0x14280 nfsidl nfsio 52099 183460 0 0 3 0x14280 nfsidl nfsio 99421 26997 0 0 3 0x14280 nfsidl nfsio 69190 172881 1 0 3 0x100083 ttyin getty 181 186201 11597 0 3 0x82 nanoslp syz-executor 7443 33220 11597 0 2 0x2 syz-executor 2196 122468 0 0 3 0x14200 bored sosplice 70121 15874 11597 0 3 0x82 nanoslp syz-executor 69020 258217 11597 0 3 0x82 nanoslp syz-executor 84412 203424 11597 0 2 0x2 syz-executor 11597 213589 59784 0 2 0x3 syz-executor 59784 493872 18349 0 3 0x10008a sigsusp ksh 18349 104936 20198 0 3 0x98 kqread sshd-session 20198 259697 37034 0 3 0x92 kqread sshd-session 37034 79354 1 0 3 0x88 kqread sshd 10121 25137 86955 74 3 0x1100092 bpf pflogd 86955 484777 1 0 3 0x80 sbwait pflogd 14866 94350 29659 73 3 0x1100090 kqread syslogd 29659 266319 1 0 3 0x100082 sbwait syslogd 73344 43992 1 0 3 0x100080 kqread resolvd 8871 203427 70040 77 3 0x100092 kqread dhcpleased 89805 202414 70040 77 3 0x100092 kqread dhcpleased 70040 70413 1 0 3 0x80 kqread dhcpleased 59039 482264 0 0 3 0x14200 bored smr 77820 238274 0 0 2 0x14200 zerothread 24709 474990 0 0 3 0x14200 aiodoned aiodoned 33217 105289 0 0 3 0x14200 syncer update 1734 103129 0 0 3 0x14200 cleaner cleaner 59932 211015 0 0 3 0x14200 reaper reaper 15163 405050 0 0 3 0x14200 pgdaemon pagedaemon 40137 155761 0 0 3 0x14200 bored viomb 71077 93967 0 0 3 0x40014200 acpi0 acpi0 71038 152777 0 0 3 0x40014200 idle1 20697 214139 0 0 3 0x14200 bored softnet3 68272 295033 0 0 3 0x14200 bored softnet2 96169 166981 0 0 3 0x14200 bored softnet1 14975 470263 0 0 3 0x14200 bored softnet0 67876 160774 0 0 3 0x14200 bored systqmp 33213 33808 0 0 3 0x14200 bored systq 46480 304789 0 0 3 0x14200 tmoslp softclockmp 33446 246453 0 0 3 0x40014200 tmoslp softclock 42753 308148 0 0 3 0x40014200 idle0 1 162613 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &sched_lock r = 0 (0xffffffff83996c68) #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 sleep_setup+0xc6 sys/kern/kern_synch.c:348 #4 msleep+0x114 sys/kern/kern_synch.c:245 #5 reaper+0x14b sys/kern/kern_exit.c:454 #6 proc_trampoline+0x10 Process 7443 (syz-executor) thread 0xffff8000ffff0020 (33220) Process 84412 (syz-executor) thread 0xffff80002a2a4f78 (203424) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 11147K 11505K 166960K 14016 0 pcb 18 13K 29K 166960K 483 0 rtable 189 11K 12K 166960K 619 0 pf 39 18K 23K 166960K 175 0 ifaddr 35 6K 8K 166960K 107 0 ifgroup 51 2K 2K 166960K 173 0 sysctl 4 1K 9K 166960K 19 0 counters 66 36K 37K 166960K 184 0 ioctlops 0 0K 4K 166960K 1700 0 iov 0 0K 16K 166960K 203 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1525 96K 96K 166960K 3103 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 28 0 VM map 2 1K 1K 166960K 2 0 sem 22 11K 13K 166960K 37 0 dirhash 15 2K 3K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 1672 0 sigio 0 0K 0K 166960K 101 0 proc 72 91K 140K 166960K 874 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 315 0 in_multi 68 4K 7K 166960K 189 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 635 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 221 156K 170K 166960K 17033 0 UVM aobj 74 3K 3K 166960K 74 0 pinsyscall 42 84K 106K 166960K 2919 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 77 0 NDP 13 0K 2K 166960K 72 0 temp 79 8684K 8752K 166960K 90297 0 kqueue 14 20K 28K 166960K 287 0 SYN cache 2 10K 18K 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 120 163 0 160 2 1 1 2 0 8 0 rtentry 176 191 0 117 6 0 6 6 0 8 0 unpcb 144 1468 0 1448 10 9 1 6 0 8 0 syncache 336 15 0 15 5 5 0 1 0 8 0 tcpqe 32 7 0 7 3 3 0 1 0 8 0 tcpcb 808 535 0 526 18 13 5 8 0 8 3 arp 128 31 0 18 1 0 1 1 0 8 0 inpcb 384 1545 0 1531 23 14 9 9 0 8 7 nd6 144 42 0 24 1 0 1 1 0 8 0 pkpcb 40 8 0 8 5 4 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1192 41 0 41 4 3 1 1 0 8 1 pppxif 1504 5 0 5 3 2 1 1 0 8 1 pfstscr 40 11 0 11 4 3 1 1 0 8 1 pffrag 232 13 0 5 1 0 1 1 0 482 0 pffrnode 88 11 0 4 1 0 1 1 0 8 0 pffrent 40 24 0 16 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 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 1 1 0 1 1 0 8 0 pfstitem 24 86 0 38 1 0 1 1 0 8 0 pfstkey 128 96 0 48 2 0 2 2 0 8 0 pfstate 384 92 0 44 5 0 5 5 0 8 0 pfrule 1344 32 0 23 2 1 1 2 0 8 0 rttmr 136 3 0 3 3 3 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 839 0 506 35 13 22 31 0 8 0 art_table 32 842 0 506 4 0 4 4 0 8 0 art_node 16 185 0 120 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 27 0 7 1 0 1 1 0 8 0 shmpl 112 71 0 0 3 0 3 3 0 8 0 dirhash 1024 30 0 11 3 0 3 3 0 8 0 dino2pl 256 4314 0 2802 95 0 95 95 0 8 0 ffsino 288 4314 0 2802 109 0 109 109 0 8 0 nchpl 144 6674 0 4975 64 0 64 64 0 8 0 rtmask 32 7 0 7 4 4 0 1 0 8 0 uvmvnodes 80 4845 0 0 99 0 99 99 0 8 0 vnodes 216 4845 0 0 270 0 270 270 0 8 0 namei 1024 23527 0 23527 1 0 1 1 0 8 1 percpumem 16 107 0 59 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 1 1 0 1 1 0 8 0 kstatmem 264 100 0 74 5 3 2 3 0 8 0 scsiplug 72 11 0 11 4 4 0 1 0 8 0 scxspl 216 22204 0 22204 11 9 2 8 1 8 2 plimitpl 152 408 0 391 1 0 1 1 0 8 0 sigapl 424 1998 0 1927 10 1 9 9 0 8 0 knotepl 120 555 0 0 17 0 17 17 0 8 0 kqueuepl 224 889 0 879 18 16 2 11 0 8 1 pipepl 336 359 0 332 13 10 3 8 0 8 0 fdescpl 520 1955 0 1924 3 0 3 3 0 8 0 filepl 160 13198 0 12976 40 22 18 20 0 8 7 lockfpl 104 479 0 475 1 0 1 1 0 8 0 lockfspl 48 174 0 170 1 0 1 1 0 8 0 sessionpl 144 40 0 31 1 0 1 1 0 8 0 pgrppl 48 68 0 51 1 0 1 1 0 8 0 ucredpl 104 1770 0 1756 1 0 1 1 0 8 0 zombiepl 144 2437 0 2436 1 0 1 1 0 8 0 processpl 1208 1998 0 1927 6 0 6 6 0 8 0 procpl 656 4614 0 4538 8 0 8 8 0 8 0 srpgc 96 17 0 17 3 2 1 1 0 8 1 sosppl 168 6 0 6 3 3 0 1 0 8 0 sockpl 728 3347 0 3310 47 35 12 21 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 51 0 0 2 0 2 2 0 8 0 mbufpl 256 1203 0 0 74 0 74 74 0 8 0 bufpl 280 7535 0 1393 439 0 439 439 0 8 0 anonpl 32 8170 0 0 66 0 66 66 0 246 0 amapchunkpl 152 56633 0 56182 52 19 33 33 0 158 11 amappl16 200 4809 0 4779 46 39 7 15 0 8 2 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 145 0 133 1 0 1 1 0 8 0 amappl13 176 11 0 10 2 1 1 1 0 8 0 amappl12 168 2673 0 2643 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 44 0 44 1 1 0 1 0 8 0 amappl9 144 242 0 242 1 1 0 1 0 8 0 amappl8 136 29 0 25 1 0 1 1 0 8 0 amappl7 128 125 0 113 1 0 1 1 0 8 0 amappl6 120 230 0 225 1 0 1 1 0 8 0 amappl5 112 145 0 135 1 0 1 1 0 8 0 amappl4 104 381 0 359 1 0 1 1 0 8 0 amappl3 96 11590 0 11493 4 0 4 4 0 8 0 amappl2 88 783 0 719 2 0 2 2 0 8 0 amappl1 80 17412 0 16815 17 2 15 16 0 8 0 amappl 88 15937 0 15789 5 0 5 5 0 92 0 dma4096 4096 2 0 2 2 2 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 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 73 0 0 2 0 2 2 0 8 0 uaddrrnd 24 1954 0 1924 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1954 0 1924 1 0 1 1 0 8 0 vmmpekpl 168 18051 0 17993 4 0 4 4 0 8 0 vmmpepl 168 128926 0 127028 114 19 95 101 0 357 0 vmsppl 480 1953 0 1924 6 1 5 5 0 8 0 rwobjpl 72 38998 0 33148 110 1 109 109 0 8 0 pdppl 4096 3915 0 3848 127 56 71 85 0 8 4 pvpl 32 17149 0 0 140 1 139 139 0 265 0 pmappl 256 1953 0 1924 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 512 0 101 14 1 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x76380c26b4e0, 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(3f8,0,74) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,74) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,74) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff8343e653) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a2fc3c0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a2fc3c0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148a000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c4267d8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4267d8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80002a2fc560, 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(3f8,0,74) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,74) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,74) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff8343e653) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a2fc3c0,6) at trap_print+0x70 sys/arch/amd64/amd64/trap.c:457 kerntrap(ffff80002a2fc3c0) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148a000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff80003c4267d8) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80003c4267d8) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a2fc570) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f1a4118,81,fffffd807f7d3410,ffff80003c4267d8) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806beda490,ffff80003c4267d8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806beda490,ffff80003c4267d8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806beda490,ffff80003c4267d8) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806beda490,ffff80003c4267d8) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80003c4267d8) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80003c4267d8,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff80003c4267d8,ffff80002a2fc8e0,ffff80002a2fc830) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a2fc8e0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2fc8e0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7dc1e189c180, count: -24