*cpu0: uvm_fault(0xfffff0006c5843f0, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x79660de74bd0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800038f98200 rbx 0 rdx 0 rcx 0xffff800045fe8550 rax 0x32 r8 0xffff800038f98130 r9 0x80713 acpi_pdirpa+0x6c584 r10 0x536333b170904183 r11 0x9aab3af8c2c64d63 r12 0 r13 0 r14 0xffff800045fe8550 r15 0 rip 0xffffffff826b93ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800038f98180 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=328189 pid=79049 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=0xffff800045fe8d18,0xffff800045fe8030 process=0xffff800045fe7510 user=0xffff800038f93000, vmspace=0xfffff0006c584d78 estcpu=19, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *79049 328189 7556 0 7 0 0 syz-executor 93423 127166 50505 0 2 0 0 syz-executor 6763 235923 97729 0 2 0 0 syz-executor 6763 424877 97729 0 3 0 0x4000080 fsleep syz-executor 69072 180724 12365 0 2 0 0 syz-executor 69072 55277 12365 0 7 0 0x4000000 syz-executor 46122 309237 51985 0 2 0 0 syz-executor 54933 12959 42800 0 2 0 0 syz-executor 54933 151494 42800 0 2 0 0x4000000 syz-executor 54933 315464 42800 0 3 0 0x4000080 fsleep syz-executor 63058 202223 57777 0 2 0 0 syz-executor 63058 124111 57777 0 2 0 0x4000000 syz-executor 84433 225197 96322 0 2 0 0 syz-executor 84433 85820 96322 0 3 0 0x4000080 fsleep syz-executor 84433 446922 96322 0 3 0 0x4000080 fsleep syz-executor 97729 512742 70641 0 2 0x2 0xc80 syz-executor 7556 246147 70641 0 2 0x2 0xc80 syz-executor 51985 2826 70641 0 2 0x2 0xc80 syz-executor 50505 82696 70641 0 2 0x2 0 syz-executor 96322 4269 70641 0 2 0x2 0xc80 syz-executor 12365 169737 70641 0 3 0x2 0x80 nanoslp syz-executor 42800 321163 70641 0 2 0x2 0xc80 syz-executor 57777 342443 70641 0 2 0x2 0 syz-executor 70641 359840 58866 0 3 0x2 0x80 kqread syz-executor 58866 310183 1106 0 3 0x100002 0x88 sigsusp ksh 1106 334988 55258 0 3 0x10 0x88 kqread sshd-session 55258 156465 34599 0 3 0x12 0x80 kqread sshd-session 57973 132133 1 0 3 0x100003 0x80 ttyin getty 34599 151842 1 0 3 0 0x88 kqread sshd 38560 104574 3569 74 3 0x1100012 0x80 bpf pflogd 3569 17844 1 0 3 0 0x80 sbwait pflogd 6463 123683 9944 73 3 0x1100010 0x80 kqread syslogd 9944 516830 1 0 3 0x100002 0x80 sbwait syslogd 86381 124042 1 0 3 0x100000 0x80 kqread resolvd 55922 464141 70207 77 3 0x100012 0x80 kqread dhcpleased 7359 87556 70207 77 3 0x100012 0x80 kqread dhcpleased 70207 471612 1 0 3 0 0x80 kqread dhcpleased 69412 239534 0 0 3 0x14000 0x200 bored smr 91394 484514 0 0 2 0x14000 0x200 zerothread 94174 389775 0 0 3 0x14000 0x200 aiodoned aiodoned 2538 245162 0 0 3 0x14000 0x200 syncer update 11310 43985 0 0 3 0x14000 0x200 cleaner cleaner 72893 182767 0 0 3 0x14000 0x200 reaper reaper 49731 350914 0 0 3 0x14000 0x200 pgdaemon pagedaemon 58394 473092 0 0 3 0x14000 0x200 bored viomb 49764 12275 0 0 3 0x14000 0x40000200 acpi0 acpi0 726 52998 0 0 3 0x14000 0x40000200 idle1 65475 64886 0 0 3 0x14000 0x200 bored softnet1 21498 342985 0 0 3 0x14000 0x200 bored softnet0 89922 2753 0 0 3 0x14000 0x200 bored systqmp 82059 416380 0 0 3 0x14000 0x200 bored systq 96272 421594 0 0 3 0x14000 0x200 tmoslp softclockmp 50957 323808 0 0 3 0x14000 0x40000200 tmoslp softclock 62205 238698 0 0 3 0x14000 0x40000200 idle0 1 157742 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex vmmpepl r = 0 (0xffffffff83ae7d00) #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 pool_get+0x124 sys/kern/subr_pool.c:585 #3 uvm_mapent_alloc+0x354 sys/uvm/uvm_map.c:-1 #4 uvm_mapanon+0x272 sys/uvm/uvm_map.c:-1 #5 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #6 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #7 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #8 Xsyscall+0x128 Process 69072 (syz-executor) thread 0xffff800045fe9ca8 (55277) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a7a440) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12094K 12474K 166960K 12223 0 pcb 17 12K 12K 166960K 38 0 rtable 241 7K 7K 166960K 361 0 pf 34 17K 24K 166960K 55 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 60 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1497 0 iov 0 0K 1K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1356 85K 86K 166960K 1478 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 2 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 196 0 proc 72 115K 164K 166960K 560 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 2 0 in_multi 99 6K 6K 166960K 102 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 3 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 397 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 215 158K 169K 166960K 3564 0 UVM aobj 37 2K 2K 166960K 37 0 pinsyscall 43 86K 105K 166960K 1355 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 29 0 temp 34 9114K 9122K 166960K 4184 0 kqueue 16 22K 26K 166960K 39 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 38 0 35 1 0 1 1 0 8 0 rtentry 176 113 0 2 6 0 6 6 0 8 0 unpcb 144 123 0 106 4 0 4 4 0 8 3 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 20 0 15 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 148 0 139 4 0 4 4 0 8 3 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 pppxif 1576 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 3 0 0 1 0 1 1 0 8 0 pfstitem 24 26 0 0 1 0 1 1 0 8 0 pfstkey 128 26 0 0 1 0 1 1 0 8 0 pfstate 448 26 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 256 472 0 6 30 0 30 30 0 8 0 art_table 40 473 0 6 5 0 5 5 0 8 0 art_node 32 113 0 12 1 0 1 1 0 8 0 shmpl 112 34 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1671 0 204 93 0 93 93 0 8 0 ffsino 296 1671 0 204 114 0 114 114 0 8 0 nchpl 144 1952 0 255 64 0 64 64 0 8 0 vnodes 216 1861 0 0 104 0 104 104 0 8 0 namei 1024 6068 0 6068 2 0 2 2 0 8 2 percpumem 16 53 0 2 1 0 1 1 0 8 0 kstatmem 264 29 0 2 2 0 2 2 0 8 0 scxspl 216 6600 0 6600 3 2 1 2 1 8 1 plimitpl 152 33 0 16 1 0 1 1 0 8 0 sigapl 424 514 0 466 7 0 7 7 0 8 1 knotepl 120 298 0 0 10 0 10 10 0 8 0 kqueuepl 224 72 0 61 3 0 3 3 0 8 2 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 498 0 466 3 0 3 3 0 8 0 filepl 160 2113 0 1898 13 0 13 13 0 8 2 lockfpl 104 45 0 42 1 0 1 1 0 8 0 lockfspl 48 24 0 21 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 111 0 98 1 0 1 1 0 8 0 zombiepl 144 466 0 466 1 0 1 1 0 8 1 processpl 1232 514 0 466 5 0 5 5 0 8 0 procpl 664 622 0 567 6 0 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 312 0 283 11 0 11 11 0 8 8 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mextrefs 64 29 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 189 0 0 12 0 12 12 0 8 0 bufpl 272 2372 0 105 152 0 152 152 0 8 0 anonpl 32 3722 0 0 31 0 31 31 0 247 0 amapchunkpl 152 9975 0 9548 21 0 21 21 0 158 1 amappl16 200 1622 0 1602 5 2 3 5 0 8 1 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 428 0 427 1 0 1 1 0 8 0 amappl13 176 126 0 114 1 0 1 1 0 8 0 amappl12 168 749 0 720 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 62 0 48 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 156 0 143 1 0 1 1 0 8 0 amappl6 120 159 0 157 1 0 1 1 0 8 0 amappl5 112 98 0 88 1 0 1 1 0 8 0 amappl4 104 292 0 275 1 0 1 1 0 8 0 amappl3 96 1764 0 1682 3 0 3 3 0 8 0 amappl2 88 616 0 544 2 0 2 2 0 8 0 amappl1 80 10621 0 10016 15 0 15 15 0 8 2 amappl 88 2834 0 2690 4 0 4 4 0 92 0 uvmvnodes 80 102 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 36 0 0 1 0 1 1 0 8 0 uaddrrnd 24 498 0 466 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 498 0 466 1 0 1 1 0 8 0 vmmpekpl 168 6163 0 6129 2 0 2 2 0 8 0 vmmpepl 168 40583 0 38679 88 0 88 88 0 357 2 vmsppl 488 497 0 466 5 0 5 5 0 8 1 rwobjpl 80 14973 0 13947 24 0 24 24 0 8 0 pdppl 4096 1003 0 932 95 24 71 83 0 8 0 pvpl 32 10447 0 0 85 0 85 85 0 265 0 pmappl 256 497 0 466 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 424 0 27 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83984ff0) 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+0x3b sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1274 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(ffffffff835480cf) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800032792690) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff800032792690) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff800032792690) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fe9ca8,fffff00067ae3060,ffff800032792850) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fe9ca8,ffff8000327929a0,ffff8000327928f0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 end trace frame: 0xffff800032792990, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83984ff0) 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+0x3b sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,65) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,65) at comcnputc+0x250 sys/dev/ic/com.c:1274 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(ffffffff835480cf) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff800032792690) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff800032792690) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff800032792690) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fe9ca8,fffff00067ae3060,ffff800032792850) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fe9ca8,ffff8000327929a0,ffff8000327928f0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff8000327929a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000327929a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5b4fc962cd0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x79660de74bd0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x79660de74bd0, count: -1