*cpu1: uvm_fault(0xfffffd800e59a5e0, 0x0, 0, 1) -> e ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73150592ff80, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c43f5d0 rbx 0 rdx 0 rcx 0xffff800033ffa7e8 rax 0x3b r8 0xffff80003c43f500 r9 0 r10 0xfcad1ad73a14d488 r11 0xc6c3d61528889ad5 r12 0 r13 0 r14 0xffff800033ffa7e8 r15 0 rip 0xffffffff82cd03ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c43f550 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=394754 pid=84297 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800033ffbc68,0xffff800033ffafa8 process=0xffff80003ac16240 user=0xffff80003c43a000, vmspace=0xfffffd800e59a7c8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55746 252845 34835 0 2 0 syz-executor *84297 394754 35281 0 7 0 syz-executor 84297 103984 35281 0 2 0x4000080 syz-executor 79615 81150 71390 0 3 0x80 nanoslp syz-executor 79615 324334 71390 0 3 0x4000080 kqsel syz-executor 79615 403613 71390 0 3 0x4000080 fsleep syz-executor 63115 91967 52 0 3 0x80 nanoslp syz-executor 63115 95819 52 0 3 0x4000080 kqread syz-executor 63115 378978 52 0 3 0x4000080 fsleep syz-executor 63115 480872 52 0 3 0x4000080 fsleep syz-executor 18717 82754 38606 0 3 0x80 nanoslp syz-executor 18717 137522 38606 0 3 0x4000080 pipewr syz-executor 18717 62912 38606 0 3 0x4000080 piperd syz-executor 18717 110915 38606 0 3 0x4000080 fsleep syz-executor 34835 226792 46112 0 3 0x82 nanoslp syz-executor 85105 118877 0 0 3 0x14280 nfsidl nfsio 51987 190467 0 0 3 0x14280 nfsidl nfsio 147 17445 0 0 3 0x14280 nfsidl nfsio 46335 18940 0 0 3 0x14280 nfsidl nfsio 75248 305990 0 0 3 0x14280 nfsidl nfsio 44166 363469 0 0 3 0x14280 nfsidl nfsio 56233 245325 0 0 3 0x14280 nfsidl nfsio 29528 109252 0 0 3 0x14280 nfsidl nfsio 99007 243627 0 0 3 0x14280 nfsidl nfsio 75710 303461 0 0 3 0x14280 nfsidl nfsio 15760 350380 0 0 3 0x14280 nfsidl nfsio 76461 476732 0 0 3 0x14280 nfsidl nfsio 79612 67593 0 0 3 0x14280 nfsidl nfsio 4452 444693 0 0 3 0x14280 nfsidl nfsio 83111 159374 0 0 3 0x14280 nfsidl nfsio 5333 189295 0 0 3 0x14280 nfsidl nfsio 42697 27591 0 0 3 0x14280 nfsidl nfsio 15265 474158 0 0 3 0x14280 nfsidl nfsio 70191 108484 0 0 3 0x14280 nfsidl nfsio 92908 369213 0 0 3 0x14280 nfsidl nfsio 75060 254978 46112 0 3 0x82 wait syz-executor 37237 240691 0 0 3 0x14200 bored sosplice 1451 91398 46112 0 3 0x82 wait syz-executor 91001 29967 46112 0 3 0x82 nanoslp syz-executor 35281 76902 46112 0 3 0x82 nanoslp syz-executor 52 60869 46112 0 3 0x82 nanoslp syz-executor 38606 231899 46112 0 3 0x82 nanoslp syz-executor 71390 89510 46112 0 3 0x82 nanoslp syz-executor 46112 57150 78362 0 2 0x2 syz-executor 78362 182740 21160 0 3 0x10008a sigsusp ksh 21160 466035 14015 0 3 0x98 kqread sshd-session 14015 468987 41456 0 3 0x92 kqread sshd-session 70886 241161 1 0 3 0x100083 ttyin getty 41456 440267 1 0 3 0x88 kqread sshd 99942 410899 51789 74 3 0x1100092 bpf pflogd 51789 482027 1 0 3 0x80 sbwait pflogd 73852 349011 35185 73 3 0x1100090 kqread syslogd 35185 457218 1 0 3 0x100082 sbwait syslogd 56901 35635 1 0 3 0x100080 kqread resolvd 74777 117459 67279 77 3 0x100092 kqread dhcpleased 42685 377671 67279 77 3 0x100092 kqread dhcpleased 67279 197106 1 0 3 0x80 kqread dhcpleased 2189 421723 0 0 3 0x14200 bored smr 93997 136268 0 0 3 0x14200 pgzero zerothread 74223 500220 0 0 3 0x14200 aiodoned aiodoned 66080 411942 0 0 3 0x14200 syncer update 96223 186479 0 0 3 0x14200 cleaner cleaner 79586 146962 0 0 3 0x14200 reaper reaper 80801 371402 0 0 3 0x14200 pgdaemon pagedaemon 77038 238018 0 0 3 0x14200 bored viomb 48690 373818 0 0 3 0x40014200 acpi0 acpi0 98154 110729 0 0 3 0x40014200 idle1 80544 376182 0 0 3 0x14200 bored softnet7 41597 223772 0 0 3 0x14200 bored softnet6 84916 263892 0 0 3 0x14200 bored softnet5 32523 235247 0 0 3 0x14200 bored softnet4 95897 491628 0 0 3 0x14200 bored softnet3 65020 46301 0 0 3 0x14200 bored softnet2 52396 286440 0 0 3 0x14200 bored softnet1 7834 203628 0 0 3 0x14200 bored softnet0 78294 66922 0 0 3 0x14200 bored systqmp 3877 173466 0 0 3 0x14200 bored systq 52071 381978 0 0 3 0x14200 tmoslp softclockmp 43440 132396 0 0 3 0x40014200 tmoslp softclock 72339 442140 0 0 3 0x40014200 idle0 1 388118 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 (0xffffffff839b7e90) #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 futex_wake+0x28a futex_list_wakeup sys/kern/sys_futex.c:340 [inline] #3 futex_wake+0x28a sys/kern/sys_futex.c:476 #4 sys_futex+0x223 sys/kern/sys_futex.c:154 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 Process 84297 (syz-executor) thread 0xffff800033ffa7e8 (394754) exclusive rwlock futexlk r = 0 (0xffffffff838dae28) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x42b sys/kern/kern_rwlock.c:319 #2 futex_wake+0xc0 sys/kern/sys_futex.c:461 #3 sys_futex+0x223 sys/kern/sys_futex.c:154 #4 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 exclusive mutex &sched_lock r = 0 (0xffffffff839b7e90) #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 futex_wake+0x28a futex_list_wakeup sys/kern/sys_futex.c:340 [inline] #3 futex_wake+0x28a sys/kern/sys_futex.c:476 #4 sys_futex+0x223 sys/kern/sys_futex.c:154 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10299 11244K 11498K 166960K 11997 0 pcb 83 29K 29K 166960K 164 0 rtable 178 9K 9K 166960K 514 0 pf 34 17K 81K 166960K 93 0 ifaddr 37 6K 7K 166960K 79 0 ifgroup 51 2K 2K 166960K 118 0 sysctl 4 1K 9K 166960K 11 0 counters 66 36K 37K 166960K 142 0 ioctlops 0 0K 4K 166960K 1688 0 iov 0 0K 14K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1398 88K 88K 166960K 1882 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 617 0 sigio 0 0K 0K 166960K 47 0 proc 74 131K 164K 166960K 620 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 81 0 in_multi 80 5K 6K 166960K 152 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 145 652K 652K 166960K 145 0 exec 0 0K 1K 166960K 479 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 250 168K 182K 166960K 7145 0 UVM aobj 18 4K 4K 166960K 18 0 pinsyscall 43 86K 106K 166960K 1776 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 20 0 NDP 13 0K 1K 166960K 51 0 temp 50 8677K 8756K 166960K 16513 0 kqueue 14 22K 28K 166960K 113 0 SYN cache 2 16K 16K 166960K 2 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 77 0 74 1 0 1 1 0 8 0 rtentry 176 129 0 60 4 0 4 4 0 8 0 unpcb 144 576 0 553 6 5 1 6 0 8 0 syncache 336 6 0 6 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 158 0 151 4 3 1 4 0 8 0 arp 128 14 0 4 1 0 1 1 0 8 0 inpcb 328 514 0 500 5 3 2 4 0 8 0 nd6 144 21 0 9 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 26 0 26 2 1 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 35 0 33 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 46 0 6 1 0 1 1 0 8 0 pfstkey 128 49 0 9 2 0 2 2 0 8 0 pfstate 384 48 0 8 5 0 5 5 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 629 0 282 27 4 23 27 0 8 0 art_table 40 630 0 282 5 0 5 5 0 8 0 art_node 32 128 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 15 0 0 1 0 1 1 0 8 0 dirhash 1024 30 0 13 3 0 3 3 0 8 0 dino2pl 256 2440 0 932 95 0 95 95 0 8 0 ffsino 296 2440 0 932 117 0 117 117 0 8 0 nchpl 144 3183 0 1483 64 0 64 64 0 8 0 rtmask 32 10 0 10 1 1 0 1 0 8 0 uvmvnodes 80 2839 0 0 58 0 58 58 0 8 0 vnodes 216 2839 0 0 158 0 158 158 0 8 0 namei 1024 10888 0 10888 3 2 1 2 0 8 1 percpumem 16 86 0 38 1 0 1 1 0 8 0 kstatmem 264 66 0 40 4 1 3 3 0 8 1 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 20147 0 20147 9 2 7 7 1 8 7 plimitpl 152 194 0 175 1 0 1 1 0 8 0 sigapl 424 926 0 851 9 0 9 9 0 8 0 knotepl 120 528 0 0 16 0 16 16 0 8 0 kqueuepl 224 171 0 159 1 0 1 1 0 8 0 pipepl 344 149 0 121 3 0 3 3 0 8 0 fdescpl 528 882 0 850 3 0 3 3 0 8 0 filepl 160 5171 0 4800 21 5 16 16 0 8 0 lockfpl 104 282 0 214 2 0 2 2 0 8 0 lockfspl 48 165 0 97 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 717 0 702 1 0 1 1 0 8 0 zombiepl 144 854 0 851 1 0 1 1 0 8 0 processpl 1248 926 0 851 6 0 6 6 0 8 0 procpl 656 1669 0 1585 8 0 8 8 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 752 1253 0 1148 24 13 11 17 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 65 0 0 9 0 9 9 0 8 0 mtagpl 96 15 0 0 1 0 1 1 0 8 0 mbufpl 256 259 0 0 16 0 16 16 0 8 0 bufpl 280 9530 0 3388 440 0 440 440 0 8 0 anonpl 32 14565 0 0 118 0 118 118 0 246 0 amapchunkpl 152 22859 0 22339 39 13 26 31 0 158 3 amappl16 200 2828 0 2800 37 30 7 30 0 8 0 amappl15 192 6 0 5 1 0 1 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 26 0 26 1 1 0 1 0 8 0 amappl12 168 1579 0 1548 3 1 2 2 0 8 0 amappl11 160 55 0 40 1 0 1 1 0 8 0 amappl10 152 17 0 17 1 1 0 1 0 8 0 amappl9 144 255 0 254 1 0 1 1 0 8 0 amappl8 136 42 0 39 1 0 1 1 0 8 0 amappl7 128 117 0 105 1 0 1 1 0 8 0 amappl6 120 194 0 191 1 0 1 1 0 8 0 amappl5 112 129 0 119 1 0 1 1 0 8 0 amappl4 104 319 0 299 1 0 1 1 0 8 0 amappl3 96 4226 0 4106 5 1 4 4 0 8 0 amappl2 88 695 0 633 2 0 2 2 0 8 0 amappl1 80 11073 0 10463 15 0 15 15 0 8 0 amappl 88 6317 0 6141 6 1 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 882 0 850 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 882 0 850 1 0 1 1 0 8 0 vmmpekpl 168 8855 0 8796 3 0 3 3 0 8 0 vmmpepl 168 61897 0 59850 115 16 99 115 0 357 1 vmsppl 488 881 0 850 6 1 5 5 0 8 0 rwobjpl 80 21802 0 17994 79 0 79 79 0 8 0 pdppl 4096 1771 0 1700 113 40 73 85 0 8 2 pvpl 32 21164 0 0 172 1 171 171 0 265 0 pmappl 256 881 0 850 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 54 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x73150592ff80, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,72) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,72) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(72) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff8343dbde) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800035881760) at db_ktrap+0x1b7 sys/arch/amd64/amd64/db_interface.c:129 kerntrap(ffff800035881760) at kerntrap+0x23e sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001480000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff800033ffbc68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff800033ffbc68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff800035881900, 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_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:654 comcnputc(800,72) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1655 [inline] comcnputc(800,72) at comcnputc+0xd0 sys/dev/ic/com.c:1259 cnputc(72) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff8343dbde) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800035881760) at db_ktrap+0x1b7 sys/arch/amd64/amd64/db_interface.c:129 kerntrap(ffff800035881760) at kerntrap+0x23e sys/arch/amd64/amd64/trap.c:482 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001480000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,1,2000,ffff800033ffbc68) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff800033ffbc68) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff800035881910) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8069c9e008,1,fffffd80097fb618,ffff800033ffbc68) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805f4a9148,ffff800033ffbc68) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805f4a9148,ffff800033ffbc68) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805f4a9148,ffff800033ffbc68) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd805f4a9148,ffff800033ffbc68) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff800033ffbc68) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff800033ffbc68,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff800033ffbc68,ffff800035881c80,ffff800035881bd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800035881c80) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800035881c80) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b5cd7787410, count: -24