*cpu1: uvm_fault(0xfffff8806cd2c7c0, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7316e4b75b00, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a2e4bd0 rbx 0 rdx 0 rcx 0xffff800045ffdc90 rax 0x3b r8 0xffff80002a2e4b00 r9 0 r10 0xa2de12e14e3f2831 r11 0x3b0911aebd4fd38b r12 0 r13 0 r14 0xffff800045ffdc90 r15 0 rip 0xffffffff8257e3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a2e4b50 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=274791 pid=66157 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=0xffff800045ffd4c8,0xffff800045ffc548 process=0xffff800045ff49a8 user=0xffff80002a2df000, vmspace=0xfffff8800b1cb988 estcpu=36, cpticks=8, pctcpu=0.4, user=0, sys=8, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 74833 336459 78568 -1 2 0x10 0 syz-executor 74833 282301 78568 -1 7 0x10 0x4000000 syz-executor 49027 70660 80659 0 2 0 0 syz-executor 41239 176916 46756 0 2 0 0 syz-executor 41239 134409 46756 0 2 0 0x4000000 syz-executor 6614 447137 69106 0 2 0 0 syz-executor 6614 397161 69106 0 2 0 0x4000000 syz-executor 69446 321977 2559 0 2 0 0 syz-executor 69446 101211 2559 0 3 0 0x4000080 fsleep syz-executor 2889 310201 71167 0 2 0 0 syz-executor 2889 387682 71167 0 3 0 0x4000080 fsleep syz-executor 94842 69683 62602 0 2 0 0 syz-executor 94842 110067 62602 0 3 0 0x4000080 nanoslp syz-executor 60200 26824 66157 0 2 0 0 syz-executor 60200 496708 66157 0 3 0 0x4000080 fsleep syz-executor 80659 54669 57636 0 3 0x2 0x80 nanoslp syz-executor 71167 77900 57636 0 3 0x2 0x80 nanoslp syz-executor 46756 172212 57636 0 3 0x2 0x80 nanoslp syz-executor 2559 406120 57636 0 3 0x2 0x80 nanoslp syz-executor 69106 115467 57636 0 3 0x2 0x80 nanoslp syz-executor *66157 274791 57636 0 7 0x2 0 syz-executor 62602 192142 57636 0 3 0x2 0x80 nanoslp syz-executor 78568 432436 57636 0 3 0x2 0x80 nanoslp syz-executor 57636 315583 3059 0 3 0x2 0x80 kqread syz-executor 3059 235972 2695 0 3 0x100002 0x88 sigsusp ksh 2695 306519 17564 0 3 0x10 0x88 kqread sshd-session 17564 356905 94655 0 3 0x12 0x80 kqread sshd-session 97182 485374 1 0 3 0x100003 0x80 ttyin getty 94655 148078 1 0 3 0 0x88 kqread sshd 18055 151594 67410 74 3 0x1100012 0x80 bpf pflogd 67410 268961 1 0 3 0 0x80 sbwait pflogd 25040 490470 82229 73 3 0x1100010 0x80 kqread syslogd 82229 117885 1 0 3 0x100002 0x80 sbwait syslogd 28765 390236 1 0 3 0x100000 0x80 kqread resolvd 90704 288690 16602 77 3 0x100012 0x80 kqread dhcpleased 61399 309568 16602 77 3 0x100012 0x80 kqread dhcpleased 16602 236243 1 0 3 0 0x80 kqread dhcpleased 37877 50470 0 0 3 0x14000 0x200 bored smr 80632 96969 0 0 2 0x14000 0x200 zerothread 88047 272856 0 0 3 0x14000 0x200 aiodoned aiodoned 42220 212022 0 0 3 0x14000 0x200 syncer update 44253 522018 0 0 3 0x14000 0x200 cleaner cleaner 41294 460632 0 0 3 0x14000 0x200 reaper reaper 45875 20687 0 0 3 0x14000 0x200 pgdaemon pagedaemon 80162 364887 0 0 3 0x14000 0x200 bored viomb 35319 439909 0 0 3 0x14000 0x40000200 acpi0 acpi0 43587 163450 0 0 3 0x14000 0x40000200 idle1 71345 219659 0 0 3 0x14000 0x200 bored softnet1 96047 216607 0 0 3 0x14000 0x200 bored softnet0 87438 201405 0 0 3 0x14000 0x200 bored systqmp 2168 369166 0 0 3 0x14000 0x200 bored systq 18518 160251 0 0 3 0x14000 0x200 tmoslp softclockmp 88657 163848 0 0 3 0x14000 0x40000200 tmoslp softclock 35634 448370 0 0 3 0x14000 0x40000200 idle0 1 133948 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 74833 (syz-executor) thread 0xffff800045fee2b0 (282301) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aedc00) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11067 12154K 12439K 166960K 12296 0 pcb 19 12K 12K 166960K 42 0 rtable 203 6K 8K 166960K 382 0 pf 36 18K 24K 166960K 108 0 ifaddr 37 6K 7K 166960K 48 0 ifgroup 55 2K 2K 166960K 66 0 sysctl 3 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1537 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1361 86K 86K 166960K 1503 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 1K 166960K 12 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 81K 166960K 240 0 sigio 1 0K 0K 166960K 4 0 proc 72 115K 147K 166960K 582 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 13 0 in_multi 77 5K 6K 166960K 103 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 460 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 223 159K 173K 166960K 3997 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 100K 166960K 1426 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 12 0K 2K 166960K 31 0 temp 34 9114K 9122K 166960K 9635 0 kqueue 14 22K 26K 166960K 48 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 74 0 71 2 0 2 2 0 8 1 rtentry 176 112 0 23 6 0 6 6 0 8 0 unpcb 144 63 0 46 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 27 0 23 1 0 1 1 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 136 0 127 2 0 2 2 0 8 1 nd6 152 25 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfstscr 40 4 0 2 1 0 1 1 0 8 0 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 4 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 0 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 0 1 1 0 8 1 pfanchor 1288 11 0 3 1 0 1 1 0 8 0 pftag 88 3 0 1 1 0 1 1 0 8 0 pfstitem 24 28 0 2 1 0 1 1 0 8 0 pfstkey 128 28 0 2 1 0 1 1 0 8 0 pfstate 448 26 0 1 3 0 3 3 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 463 0 88 29 0 29 29 0 8 3 art_table 40 464 0 88 5 0 5 5 0 8 0 art_node 32 112 0 31 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 9 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1755 0 283 93 0 93 93 0 8 0 ffsino 296 1755 0 283 114 0 114 114 0 8 0 nchpl 144 2110 0 403 64 0 64 64 0 8 0 vnodes 216 1955 0 0 109 0 109 109 0 8 0 namei 1024 6626 0 6626 2 0 2 2 0 8 2 percpumem 16 54 0 3 1 0 1 1 0 8 0 kstatmem 264 35 0 6 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7530 0 7530 10 2 8 8 1 8 8 plimitpl 152 42 0 25 1 0 1 1 0 8 0 sigapl 424 566 0 518 6 0 6 6 0 8 0 knotepl 120 291 0 0 9 0 9 9 0 8 0 kqueuepl 224 43 0 33 1 0 1 1 0 8 0 pipepl 344 134 0 107 3 0 3 3 0 8 0 fdescpl 528 550 0 518 3 0 3 3 0 8 0 filepl 160 2249 0 2031 13 0 13 13 0 8 3 lockfpl 104 51 0 46 1 0 1 1 0 8 0 lockfspl 48 25 0 20 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 40 0 23 1 0 1 1 0 8 0 ucredpl 104 175 0 160 1 0 1 1 0 8 0 zombiepl 144 518 0 518 1 0 1 1 0 8 1 processpl 1232 566 0 518 5 0 5 5 0 8 0 procpl 664 758 0 703 6 0 6 6 0 8 1 sockpl 752 275 0 246 7 0 7 7 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mextrefs 64 18 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 130 0 0 9 0 9 9 0 8 0 bufpl 272 2488 0 107 159 0 159 159 0 8 0 anonpl 32 7489 0 0 61 0 61 61 0 247 0 amapchunkpl 152 11823 0 11374 28 0 28 28 0 158 10 amappl16 200 2175 0 2151 15 4 11 14 0 8 8 amappl15 192 16 0 15 1 0 1 1 0 8 0 amappl14 184 438 0 437 1 0 1 1 0 8 0 amappl13 176 127 0 115 1 0 1 1 0 8 0 amappl12 168 830 0 799 2 0 2 2 0 8 0 amappl11 160 17 0 17 1 1 0 1 0 8 0 amappl10 152 78 0 64 1 0 1 1 0 8 0 amappl9 144 276 0 275 2 1 1 1 0 8 0 amappl8 136 123 0 121 1 0 1 1 0 8 0 amappl7 128 158 0 145 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 104 0 94 1 0 1 1 0 8 0 amappl4 104 299 0 280 1 0 1 1 0 8 0 amappl3 96 2174 0 2064 4 0 4 4 0 8 0 amappl2 88 555 0 495 2 0 2 2 0 8 0 amappl1 80 11013 0 10403 15 0 15 15 0 8 2 amappl 88 3226 0 3074 5 0 5 5 0 92 1 uvmvnodes 80 101 0 0 3 0 3 3 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 8 0 8 2 1 1 1 0 8 1 dma128 128 253 0 253 1 1 0 1 0 8 0 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 550 0 518 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 550 0 518 1 0 1 1 0 8 0 vmmpekpl 168 6522 0 6491 2 0 2 2 0 8 0 vmmpepl 168 45069 0 43139 96 0 96 96 0 357 12 vmsppl 488 549 0 518 5 0 5 5 0 8 1 rwobjpl 80 16152 0 15135 27 0 27 27 0 8 4 pdppl 4096 1107 0 1036 95 24 71 79 0 8 0 pvpl 32 13443 0 0 110 1 109 109 0 265 0 pmappl 256 549 0 518 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 426 0 27 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: 0x7316e4b75b00, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,61) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b1cf5) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3eedd0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3eedd0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3eedd0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fee2b0,fffff88060df5da0,ffff80003c3eefb0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003c3ef020, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x175 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x175 sys/dev/acpi/acpitimer.c:125 comcnputc(800,61) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b1cf5) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3eedd0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3eedd0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3eedd0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fee2b0,fffff88060df5da0,ffff80003c3eefb0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800045fee2b0,ffff80003c3ef100,ffff80003c3ef050) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c3ef100) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3ef100) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8343406bb00, count: -17