*cpu1: uvm_fault(0xfffff1806c148020, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7224ad31ff20, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003b3b3eb0 rbx 0 rdx 0 rcx 0xffff80003c4442c8 rax 0x32 r8 0xffff80003b3b3de0 r9 0x80713 acpi_pdirpa+0x6c584 r10 0x849496f6c0708161 r11 0x42cd5959858dd2c9 r12 0 r13 0 r14 0xffff80003c4442c8 r15 0 rip 0xffffffff816803ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003b3b3e30 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=263798 pid=1088 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b7bad18,0xffffffff83aaa520 process=0xffff80002a37e698 user=0xffff80003b3ae000, vmspace=0xfffff1806c1487c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND * 1088 263798 9990 0 7 0 0 syz-executor 97014 245318 25474 0 2 0 0 syz-executor 97014 283528 25474 0 3 0 0x4000080 fsleep syz-executor 4133 312549 35072 0 2 0 0 syz-executor 4133 76003 35072 0 3 0 0x4000080 fsleep syz-executor 4133 451222 35072 0 3 0 0x4000080 fsleep syz-executor 22086 520939 86603 -1 2 0x10 0 syz-executor 22086 407350 86603 -1 3 0x10 0x4000080 kqpoll syz-executor 28158 476467 88595 0 2 0 0 syz-executor 28158 252780 88595 0 3 0 0x4000080 fifor syz-executor 95065 270337 13424 0 2 0 0 syz-executor 95065 72587 13424 0 3 0 0x4000080 fsleep syz-executor 95065 463496 13424 0 3 0 0x4000080 fsleep syz-executor 5006 19556 52338 -1 2 0x10 0 syz-executor 5006 186046 52338 -1 7 0x10 0x4000000 syz-executor 24236 460705 92552 60929 3 0x11 0x80 nanoslp syz-executor 24236 342564 92552 60929 3 0x11 0x4000080 rest syz-executor 24236 218336 92552 60929 3 0x11 0x4000080 fsleep syz-executor 35072 229899 63850 0 3 0x2 0x80 nanoslp syz-executor 9990 483203 63850 0 3 0x2 0x80 nanoslp syz-executor 88595 311650 63850 0 3 0x2 0x80 nanoslp syz-executor 92552 184777 63850 0 3 0x2 0x80 nanoslp syz-executor 13424 452900 63850 0 3 0x2 0x80 nanoslp syz-executor 86603 296055 63850 0 3 0x2 0x80 nanoslp syz-executor 52338 409309 63850 0 3 0x2 0x80 nanoslp syz-executor 25474 193827 63850 0 3 0x2 0x80 nanoslp syz-executor 63850 40867 67110 0 3 0x2 0x80 kqread syz-executor 67110 279950 85542 0 3 0x100002 0x88 sigsusp ksh 85542 24256 90683 0 3 0x10 0x88 kqread sshd-session 90683 344585 71834 0 3 0x12 0x80 kqread sshd-session 56447 153117 1 0 3 0x100003 0x80 ttyin getty 71834 153127 1 0 3 0 0x88 kqread sshd 29026 230883 73430 74 3 0x1100012 0x80 bpf pflogd 73430 472852 1 0 3 0 0x80 sbwait pflogd 52210 463853 45764 73 3 0x1100010 0x80 kqread syslogd 45764 75775 1 0 3 0x100002 0x80 sbwait syslogd 33985 206444 1 0 3 0x100000 0x80 kqread resolvd 22373 61294 45826 77 3 0x100012 0x80 kqread dhcpleased 24093 408532 45826 77 3 0x100012 0x80 kqread dhcpleased 45826 400010 1 0 3 0 0x80 kqread dhcpleased 35912 148594 0 0 3 0x14000 0x200 bored smr 39593 484808 0 0 2 0x14000 0x200 zerothread 64814 328064 0 0 3 0x14000 0x200 aiodoned aiodoned 52324 419557 0 0 3 0x14000 0x200 syncer update 28747 274699 0 0 3 0x14000 0x200 cleaner cleaner 31229 226583 0 0 3 0x14000 0x200 reaper reaper 74480 14564 0 0 3 0x14000 0x200 pgdaemon pagedaemon 89198 280548 0 0 3 0x14000 0x200 bored viomb 68642 282789 0 0 3 0x14000 0x40000200 acpi0 acpi0 46690 463808 0 0 3 0x14000 0x40000200 idle1 55413 386220 0 0 3 0x14000 0x200 bored softnet1 93800 131369 0 0 3 0x14000 0x200 bored softnet0 76413 67104 0 0 3 0x14000 0x200 bored systqmp 46872 486641 0 0 3 0x14000 0x200 bored systq 21797 408899 0 0 3 0x14000 0x200 tmoslp softclockmp 93595 234001 0 0 3 0x14000 0x40000200 tmoslp softclock 93201 333689 0 0 3 0x14000 0x40000200 idle0 1 132370 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10010000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &map->flags_lock r = 0 (0xfffff1806c148938) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5171 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 1088 (syz-executor) thread 0xffff80003c4442c8 (263798) exclusive rwlock vmmaplk r = 0 (0xfffff1806c1488c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive mutex &map->flags_lock r = 0 (0xfffff1806c148938) #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 vm_map_lock_ln+0x13f sys/uvm/uvm_map.c:5171 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 5006 (syz-executor) thread 0xffff80003c444560 (186046) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a8ed40) #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 11058 12151K 12214K 166960K 12162 0 pcb 17 12K 12K 166960K 31 0 rtable 239 6K 7K 166960K 353 0 pf 34 17K 24K 166960K 60 0 ifaddr 43 7K 7K 166960K 46 0 ifgroup 55 2K 2K 166960K 57 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 1492 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1290 81K 81K 166960K 1384 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 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 172 0 proc 75 131K 180K 166960K 557 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 99 6K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 384 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 240 167K 175K 166960K 3406 0 UVM aobj 39 2K 2K 166960K 39 0 pinsyscall 43 86K 104K 166960K 1328 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 28 2K 2K 166960K 29 0 temp 35 9114K 9178K 166960K 4226 0 kqueue 13 20K 22K 166960K 30 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 34 0 31 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 53 0 34 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 12 0 7 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 82 0 74 1 0 1 1 0 8 0 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 1 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pfstitem 24 21 0 0 1 0 1 1 0 8 0 pfstkey 128 21 0 0 1 0 1 1 0 8 0 pfstate 448 21 0 0 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 460 0 0 29 0 29 29 0 8 0 art_table 40 461 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 semapl 72 1 0 0 1 0 1 1 0 8 0 shmpl 112 36 0 0 2 0 2 2 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1633 0 163 93 0 93 93 0 8 0 ffsino 296 1633 0 163 114 0 114 114 0 8 0 nchpl 144 1877 0 172 64 0 64 64 0 8 0 vnodes 216 1733 0 0 97 0 97 97 0 8 0 namei 1024 5720 0 5720 2 0 2 2 0 8 2 percpumem 16 52 0 1 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 6441 0 6441 4 1 3 3 1 8 3 plimitpl 152 31 0 13 1 0 1 1 0 8 0 sigapl 424 509 0 461 9 0 9 9 0 8 2 knotepl 120 53 0 0 2 0 2 2 0 8 0 kqueuepl 224 28 0 18 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 473 0 441 3 0 3 3 0 8 0 filepl 160 1706 0 1487 10 0 10 10 0 8 0 lockfpl 104 15 0 12 1 0 1 1 0 8 0 lockfspl 48 9 0 6 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 34 0 16 1 0 1 1 0 8 0 ucredpl 104 122 0 106 1 0 1 1 0 8 0 zombiepl 144 461 0 461 1 0 1 1 0 8 1 processpl 1232 509 0 461 6 0 6 6 0 8 1 procpl 664 575 0 517 7 0 7 7 0 8 1 sockpl 752 171 0 141 4 0 4 4 0 8 0 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 145 0 0 10 0 10 10 0 8 0 bufpl 272 2376 0 105 152 0 152 152 0 8 0 anonpl 32 3878 0 0 32 0 32 32 0 247 0 amapchunkpl 152 9350 0 8835 22 0 22 22 0 158 1 amappl16 200 1983 0 1959 5 0 5 5 0 8 3 amappl15 192 7 0 7 1 0 1 1 0 8 1 amappl14 184 432 0 430 1 0 1 1 0 8 0 amappl13 176 120 0 108 1 0 1 1 0 8 0 amappl12 168 722 0 691 2 0 2 2 0 8 0 amappl11 160 9 0 8 1 0 1 1 0 8 0 amappl10 152 92 0 78 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 0 1 1 0 8 1 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 145 0 132 1 0 1 1 0 8 0 amappl6 120 157 0 156 1 0 1 1 0 8 0 amappl5 112 105 0 95 1 0 1 1 0 8 0 amappl4 104 295 0 276 1 0 1 1 0 8 0 amappl3 96 1663 0 1560 3 0 3 3 0 8 0 amappl2 88 583 0 507 2 0 2 2 0 8 0 amappl1 80 10582 0 9963 15 0 15 15 0 8 1 amappl 88 2672 0 2503 4 0 4 4 0 92 0 uvmvnodes 80 100 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 6 0 6 1 1 0 1 0 8 0 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 38 0 0 1 0 1 1 0 8 0 uaddrrnd 24 473 0 441 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 473 0 441 1 0 1 1 0 8 0 vmmpekpl 168 5944 0 5908 2 0 2 2 0 8 0 vmmpepl 168 39917 0 37962 87 0 87 87 0 357 1 vmsppl 488 472 0 441 5 0 5 5 0 8 1 rwobjpl 80 15127 0 14052 24 0 24 24 0 8 1 pdppl 4096 953 0 882 93 10 83 83 0 8 12 pvpl 32 10255 0 0 84 0 84 84 0 265 1 pmappl 256 472 0 441 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 418 0 13 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: 0x7224ad31ff20, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,65) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83545dde) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff8000317912d0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff8000317912d0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff8000317912d0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c444560,fffff1806b764970,ffff8000317914b0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80003c444560,ffff800031791600,ffff800031791550) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 end trace frame: 0xffff8000317915f0, 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,65) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83545dde) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff8000317912d0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff8000317912d0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff8000317912d0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c444560,fffff1806b764970,ffff8000317914b0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80003c444560,ffff800031791600,ffff800031791550) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff800031791600) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031791600) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3f47abd85a0, count: -16