*cpu1: uvm_fault(0xfffff0006fbaf990, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x794ffb7d56e0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c3e3b50 rbx 0 rdx 0 rcx 0xffff80003c3b8d18 rax 0x32 r8 0xffff80003c3e3a80 r9 0x80713 acpi_pdirpa+0x6c584 r10 0x29abff2473d6b38a r11 0x1333c005997c1493 r12 0 r13 0 r14 0xffff80003c3b8d18 r15 0 rip 0xffffffff8299e3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c3e3ad0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=455109 pid=15115 tcnt=1 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=0xffff80003c3b8a80,0xffffffff83a01cb0 process=0xffff80003c479838 user=0xffff80003c3de000, vmspace=0xfffff0006ce4d9a0 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 *15115 455109 15450 0 7 0 0 syz-executor 62585 181693 45722 0 2 0 0 syz-executor 62585 420588 45722 0 3 0 0x4000080 fsleep syz-executor 63086 376329 43402 0 2 0 0 syz-executor 63086 442361 43402 0 7 0 0x4000000 syz-executor 85731 490900 15940 0 3 0 0x80 nanoslp syz-executor 85731 211651 15940 0 3 0 0x4000080 fsleep syz-executor 85731 495146 15940 0 3 0 0x4000080 fsleep syz-executor 85731 265389 15940 0 3 0 0x4000080 kqread syz-executor 61457 283195 83873 0 3 0 0x80 nanoslp syz-executor 61457 302340 83873 0 3 0 0x4000080 fsleep syz-executor 61457 42083 83873 0 3 0 0x4000080 pipewr syz-executor 61447 241524 18395 0 3 0 0x80 nanoslp syz-executor 61447 79336 18395 0 3 0 0x4000080 rest syz-executor 61447 418513 18395 0 3 0 0x4000080 fsleep syz-executor 9932 466286 0 0 3 0x14000 0x200 acct acct 82528 381521 88959 0 4 0x40000010 0x8000000 syz-executor 82528 10452 88959 0 4 0x40000010 0xc000080 pipewr syz-executor 82528 268440 88959 0 4 0x40000010 0xc000000 syz-executor 91230 137162 0 0 3 0x14000 0x280 nfsidl nfsio 73973 181367 0 0 3 0x14000 0x280 nfsidl nfsio 9448 190880 0 0 3 0x14000 0x280 nfsidl nfsio 96894 439083 0 0 3 0x14000 0x280 nfsidl nfsio 18572 8906 0 0 3 0x14000 0x280 nfsidl nfsio 54671 6187 0 0 3 0x14000 0x280 nfsidl nfsio 76501 369889 0 0 3 0x14000 0x280 nfsidl nfsio 90024 452603 0 0 3 0x14000 0x280 nfsidl nfsio 3537 477231 0 0 3 0x14000 0x280 nfsidl nfsio 22101 507678 0 0 3 0x14000 0x280 nfsidl nfsio 41084 358701 0 0 3 0x14000 0x280 nfsidl nfsio 12479 263463 0 0 3 0x14000 0x280 nfsidl nfsio 65355 521449 0 0 3 0x14000 0x280 nfsidl nfsio 63666 483228 0 0 3 0x14000 0x280 nfsidl nfsio 63996 448418 0 0 3 0x14000 0x280 nfsidl nfsio 91640 236623 0 0 3 0x14000 0x280 nfsidl nfsio 89122 438213 0 0 3 0x14000 0x280 nfsidl nfsio 10321 505528 0 0 3 0x14000 0x280 nfsidl nfsio 53098 190303 0 0 3 0x14000 0x280 nfsidl nfsio 91445 1014 0 0 3 0x14000 0x280 nfsidl nfsio 88959 502412 44937 0 3 0x2 0x80 nanoslp syz-executor 15450 350751 44937 0 3 0x2 0x80 nanoslp syz-executor 18395 166441 44937 0 3 0x2 0x80 nanoslp syz-executor 15940 397337 44937 0 3 0x2 0x80 nanoslp syz-executor 83873 154447 44937 0 3 0x2 0x80 nanoslp syz-executor 45722 189323 44937 0 3 0x2 0x80 nanoslp syz-executor 64599 415268 44937 0 3 0x2 0x80 nanoslp syz-executor 43402 92804 44937 0 3 0x2 0x80 nanoslp syz-executor 44937 157428 76479 0 3 0x2 0x80 kqread syz-executor 76479 395705 54801 0 3 0x100002 0x88 sigsusp ksh 54801 436930 73742 0 3 0x10 0x88 kqread sshd-session 73742 478873 30217 0 3 0x12 0x80 kqread sshd-session 30671 180626 1 0 3 0x100003 0x80 ttyin getty 30217 210522 1 0 3 0 0x88 kqread sshd 76526 353416 32260 74 3 0x1100012 0x80 bpf pflogd 32260 214620 1 0 3 0 0x80 sbwait pflogd 74840 45344 6569 73 3 0x1100010 0x80 kqread syslogd 6569 100014 1 0 3 0x100002 0x80 sbwait syslogd 42936 341927 1 0 3 0x100000 0x80 kqread resolvd 69856 327500 80693 77 3 0x100012 0x80 kqread dhcpleased 50436 343087 80693 77 3 0x100012 0x80 kqread dhcpleased 80693 455698 1 0 3 0 0x80 kqread dhcpleased 58109 112440 0 0 3 0x14000 0x200 bored smr 19962 490683 0 0 3 0x14000 0x200 pgzero zerothread 4371 244384 0 0 3 0x14000 0x200 aiodoned aiodoned 51217 303521 0 0 3 0x14000 0x200 syncer update 20769 469378 0 0 3 0x14000 0x200 cleaner cleaner 19918 56539 0 0 3 0x14000 0x200 reaper reaper 44778 13302 0 0 3 0x14000 0x200 pgdaemon pagedaemon 46062 98471 0 0 3 0x14000 0x200 bored viomb 20236 399900 0 0 3 0x14000 0x40000200 acpi0 acpi0 75503 349927 0 0 3 0x14000 0x40000200 idle1 1236 333832 0 0 3 0x14000 0x200 bored softnet1 44302 380751 0 0 3 0x14000 0x200 bored softnet0 74207 30819 0 0 3 0x14000 0x200 bored systqmp 312 229590 0 0 3 0x14000 0x200 bored systq 30678 38808 0 0 3 0x14000 0x200 tmoslp softclockmp 13457 238582 0 0 3 0x14000 0x40000200 tmoslp softclock 79540 396603 0 0 3 0x14000 0x40000200 idle0 1 185629 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &map->flags_lock r = 0 (0xfffff0006ce4db18) #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+0x66 sys/uvm/uvm_map.c:5157 #3 uvm_mmaplock+0x75 sys/uvm/uvm_mmap.c:949 #4 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 63086 (syz-executor) thread 0xffff80003c3b8a80 (442361) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b124c0) #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 11072 12226K 12294K 166960K 12472 0 pcb 17 16K 18K 166960K 60 0 rtable 256 9K 10K 166960K 410 0 pf 42 19K 26K 166960K 127 0 ifaddr 43 7K 7K 166960K 53 0 ifgroup 55 2K 2K 166960K 70 0 sysctl 3 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 82 0 ioctlops 0 0K 4K 166960K 1537 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1298 82K 82K 166960K 1579 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 82 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 240K 166960K 359 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 164K 166960K 578 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 60 0 in_multi 99 6K 6K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 400 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 169K 169K 166960K 5007 0 UVM aobj 78 3K 4K 166960K 80 0 pinsyscall 43 86K 106K 166960K 1502 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 12 0K 1K 166960K 34 0 temp 37 9114K 9178K 166960K 16433 0 kqueue 16 24K 27K 166960K 74 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 52 0 49 1 0 1 1 0 8 0 rtentry 176 121 0 9 6 0 6 6 0 8 0 unpcb 144 345 0 324 7 0 7 7 0 8 6 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 42 0 38 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 418 0 408 11 2 9 11 0 8 7 nd6 152 27 0 0 2 0 2 2 0 8 0 pkpcb 40 34 0 34 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 5 0 5 1 0 1 1 0 8 1 pfstscr 40 5 0 4 2 1 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 5 0 1 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 10 0 3 1 0 1 1 0 8 0 pfstitem 24 40 0 3 1 0 1 1 0 8 0 pfstkey 128 42 0 5 2 0 2 2 0 8 0 pfstate 448 40 0 3 5 0 5 5 0 8 0 pfrule 1360 30 0 23 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 477 0 4 30 0 30 30 0 8 0 art_table 40 478 0 4 5 0 5 5 0 8 0 art_node 32 119 0 17 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 72 79 0 69 1 0 1 1 0 8 0 shmpl 112 77 0 2 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2013 0 541 93 0 93 93 0 8 0 ffsino 296 2013 0 541 114 0 114 114 0 8 0 nchpl 144 2532 0 826 64 0 64 64 0 8 0 vnodes 216 2214 0 0 123 0 123 123 0 8 0 namei 1024 8019 0 8019 2 1 1 2 0 8 1 percpumem 16 57 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 39 0 12 3 1 2 3 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 9489 0 9489 10 4 6 8 1 8 6 plimitpl 152 59 0 41 1 0 1 1 0 8 0 sigapl 424 684 0 615 8 0 8 8 0 8 0 knotepl 120 552 0 0 17 0 17 17 0 8 0 kqueuepl 224 101 0 90 1 0 1 1 0 8 0 pipepl 344 141 0 112 3 0 3 3 0 8 0 fdescpl 528 647 0 615 3 0 3 3 0 8 0 filepl 160 3586 0 3353 19 0 19 19 0 8 7 lockfpl 104 168 0 164 1 0 1 1 0 8 0 lockfspl 48 46 0 42 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 39 0 21 1 0 1 1 0 8 0 ucredpl 104 423 0 408 1 0 1 1 0 8 0 zombiepl 144 616 0 615 1 0 1 1 0 8 0 processpl 1232 684 0 615 6 0 6 6 0 8 0 procpl 664 1064 0 984 8 0 8 8 0 8 0 sockpl 752 866 0 831 26 14 12 26 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 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 26 0 0 4 0 4 4 0 8 1 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 212 0 0 14 0 14 14 0 8 0 bufpl 272 2976 0 109 192 0 192 192 0 8 0 anonpl 32 9657 0 0 78 0 78 78 0 247 0 amapchunkpl 152 15132 0 14464 29 0 29 29 0 158 1 amappl16 200 2557 0 2526 21 8 13 15 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 432 0 429 1 0 1 1 0 8 0 amappl13 176 126 0 114 1 0 1 1 0 8 0 amappl12 168 901 0 870 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 63 0 49 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 119 0 117 1 0 1 1 0 8 0 amappl7 128 151 0 137 1 0 1 1 0 8 0 amappl6 120 151 0 150 1 0 1 1 0 8 0 amappl5 112 98 0 86 1 0 1 1 0 8 0 amappl4 104 301 0 282 1 0 1 1 0 8 0 amappl3 96 2699 0 2590 3 0 3 3 0 8 0 amappl2 88 773 0 693 2 0 2 2 0 8 0 amappl1 80 11255 0 10633 15 1 14 15 0 8 1 amappl 88 4246 0 4067 5 0 5 5 0 92 0 uvmvnodes 80 106 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 79 0 2 2 0 2 2 0 8 0 uaddrrnd 24 647 0 615 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 647 0 615 1 0 1 1 0 8 0 vmmpekpl 168 7329 0 7289 2 0 2 2 0 8 0 vmmpepl 168 51151 0 49152 97 0 97 97 0 357 4 vmsppl 488 646 0 615 5 1 4 5 0 8 0 rwobjpl 80 17635 0 16484 29 0 29 29 0 8 2 pdppl 4096 1301 0 1230 103 32 71 87 0 8 0 pvpl 32 16286 0 0 133 1 132 132 0 265 0 pmappl 256 646 0 615 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 477 0 38 13 0 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: 0x794ffb7d56e0, 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_write_1(3f8,0,72) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,72) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,72) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(72) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8354cc15) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3c14a0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c3c14a0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3c14a0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3b8a80,fffff0005fb97cd0,ffff80003c3c1660) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff80003c3b8a80,ffff80003c3c17b0,ffff80003c3c1700) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 end trace frame: 0xffff80003c3c17a0, 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_write_1(3f8,0,72) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,72) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,72) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(72) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(72) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff8354cc15) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3c14a0) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c3c14a0) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3c14a0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3b8a80,fffff0005fb97cd0,ffff80003c3c1660) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff80003c3b8a80,ffff80003c3c17b0,ffff80003c3c1700) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003c3c17b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3c17b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc5a9a3a2510, count: -16