*cpu1: uvm_fault(0xfffff8806cece018, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xcfdd8f84860, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c3f5af0 rbx 0 rdx 0 rcx 0xffff80003abb8550 rax 0x32 r8 0xffff80003c3f5a20 r9 0x80713 acpi_pdirpa+0x6c584 r10 0xf03ca87ecc13cb74 r11 0xbb3275d64663efb3 r12 0 r13 0 r14 0xffff80003abb8550 r15 0 rip 0xffffffff8179f3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c3f5a70 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=28998 pid=33402 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=57, usrpri=57, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abb8020,0xffffffff83b024c0 process=0xffff8000397a4e90 user=0xffff80003c3f0000, vmspace=0xfffff8806cece9a0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 33402 184032 68429 0 2 0 0 syz-executor *33402 28998 68429 0 7 0 0x4000000 syz-executor 41563 171032 30075 0 2 0 0 syz-executor 41563 11482 30075 0 3 0 0x4000080 fsleep syz-executor 92552 72839 37482 0 2 0 0 syz-executor 92552 3777 37482 0 7 0 0x4000000 syz-executor 92552 494307 37482 0 3 0 0x4000080 fsleep syz-executor 87472 293434 71945 0 2 0 0 syz-executor 87472 53622 71945 0 2 0 0x4000000 syz-executor 61477 269440 49011 0 2 0 0 syz-executor 61477 11065 49011 0 3 0 0x4000080 pipewr syz-executor 61477 277180 49011 0 3 0 0x4000080 fsleep syz-executor 11089 460895 13901 0 2 0 0 syz-executor 11089 446199 13901 0 3 0 0x4000080 fsleep syz-executor 91664 468546 97617 0 2 0 0 syz-executor 91664 335796 97617 0 3 0 0x4000080 fsleep syz-executor 77272 489234 45005 0 2 0x2 0 arp 45005 452697 17372 0 3 0x100002 0x88 sigsusp sh 13901 428002 43350 0 3 0x2 0x80 nanoslp syz-executor 68429 226780 43350 0 3 0x2 0x80 nanoslp syz-executor 49011 39618 43350 0 3 0x2 0x80 nanoslp syz-executor 37482 46407 43350 0 3 0x2 0x80 nanoslp syz-executor 30075 94011 43350 0 3 0x2 0x80 nanoslp syz-executor 71945 123729 43350 0 3 0x2 0x80 nanoslp syz-executor 97617 161026 43350 0 3 0x2 0x80 nanoslp syz-executor 17372 274446 43350 0 3 0x2 0x80 wait syz-executor 43350 364581 64156 0 3 0x2 0x80 kqread syz-executor 64156 446203 49767 0 3 0x100002 0x88 sigsusp ksh 49767 506420 5329 0 3 0x10 0x88 kqread sshd-session 5329 309710 50189 0 3 0x12 0x80 kqread sshd-session 54576 184313 1 0 3 0x100003 0x80 ttyin getty 50189 209387 1 0 3 0 0x88 kqread sshd 66207 482197 49796 74 3 0x1100012 0x80 bpf pflogd 49796 210495 1 0 3 0 0x80 sbwait pflogd 87758 38555 47143 73 3 0x1100010 0x80 kqread syslogd 47143 138737 1 0 3 0x100002 0x80 sbwait syslogd 32793 358980 1 0 3 0x100000 0x80 kqread resolvd 9393 68773 62417 77 3 0x100012 0x80 kqread dhcpleased 60552 129212 62417 77 3 0x100012 0x80 kqread dhcpleased 62417 279775 1 0 3 0 0x80 kqread dhcpleased 51034 354711 0 0 3 0x14000 0x200 bored smr 24730 229098 0 0 2 0x14000 0x200 zerothread 77192 481476 0 0 3 0x14000 0x200 aiodoned aiodoned 93207 234802 0 0 3 0x14000 0x200 syncer update 7533 88822 0 0 3 0x14000 0x200 cleaner cleaner 24181 88483 0 0 3 0x14000 0x200 reaper reaper 16649 136679 0 0 3 0x14000 0x200 pgdaemon pagedaemon 2114 434478 0 0 3 0x14000 0x200 bored viomb 97609 181670 0 0 3 0x14000 0x40000200 acpi0 acpi0 9717 456220 0 0 3 0x14000 0x40000200 idle1 23205 88123 0 0 3 0x14000 0x200 bored softnet1 45933 371873 0 0 3 0x14000 0x200 bored softnet0 24752 302520 0 0 3 0x14000 0x200 smrbar systqmp 89344 484762 0 0 3 0x14000 0x200 bored systq 89436 186109 0 0 3 0x14000 0x200 tmoslp softclockmp 86781 88922 0 0 3 0x14000 0x40000200 tmoslp softclock 8872 217629 0 0 3 0x14000 0x40000200 idle0 1 5260 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 92552 (syz-executor) thread 0xffff800045feed10 (3777) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b34800) #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 Process 24752 (systqmp) thread 0xffff800045ffecf8 (302520) shared rwlock systqmp r = 0 (0xffffffff839b43f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11053 12149K 12149K 166960K 12144 0 pcb 17 12K 12K 166960K 17 0 rtable 221 6K 6K 166960K 327 0 pf 34 17K 18K 166960K 45 0 ifaddr 41 7K 7K 166960K 43 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1483 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1291 81K 81K 166960K 1360 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 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 19 69K 93K 166960K 133 0 proc 69 115K 196K 166960K 544 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 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 378 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 229 168K 178K 166960K 3000 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 44 88K 106K 166960K 1279 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 26 1K 1K 166960K 26 0 temp 34 9114K 9120K 166960K 3848 0 kqueue 13 20K 20K 166960K 25 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 31 0 28 1 0 1 1 0 8 0 rtentry 176 103 0 1 5 0 5 5 0 8 0 unpcb 144 39 0 22 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 8 0 4 1 0 1 1 0 8 0 arp 136 17 0 0 1 0 1 1 0 8 0 inpcb 328 64 0 57 2 0 2 2 0 8 1 nd6 152 21 0 0 1 0 1 1 0 8 0 kcovpl 48 8 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 pfstitem 24 16 0 0 1 0 1 1 0 8 0 pfstkey 128 16 0 0 1 0 1 1 0 8 0 pfstate 448 16 0 0 2 0 2 2 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 256 412 0 0 26 0 26 26 0 8 0 art_table 40 413 0 0 5 0 5 5 0 8 0 art_node 32 103 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1561 0 93 92 0 92 92 0 8 0 ffsino 296 1561 0 93 113 0 113 113 0 8 0 nchpl 144 1756 0 52 64 0 64 64 0 8 0 vnodes 216 1650 0 0 92 0 92 92 0 8 0 namei 1024 5358 0 5358 2 0 2 2 0 8 2 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 6042 0 6042 4 2 2 3 1 8 2 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 450 0 401 7 0 7 7 0 8 1 knotepl 120 54 0 0 2 0 2 2 0 8 0 kqueuepl 224 21 0 12 1 0 1 1 0 8 0 pipepl 344 127 0 99 3 0 3 3 0 8 0 fdescpl 528 434 0 401 3 0 3 3 0 8 0 filepl 160 1547 0 1334 9 0 9 9 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 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 82 0 69 1 0 1 1 0 8 0 zombiepl 144 401 0 401 1 0 1 1 0 8 1 processpl 1232 450 0 401 5 0 5 5 0 8 0 procpl 664 459 0 401 5 0 5 5 0 8 0 sockpl 752 134 0 107 4 0 4 4 0 8 1 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 131 0 0 17 0 17 17 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 135 0 0 9 0 9 9 0 8 0 bufpl 272 2278 0 105 145 0 145 145 0 8 0 anonpl 32 3760 0 0 31 0 31 31 0 247 0 amapchunkpl 152 8068 0 7596 19 0 19 19 0 158 0 amappl16 200 1638 0 1626 5 0 5 5 0 8 4 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 437 0 434 1 0 1 1 0 8 0 amappl13 176 119 0 107 1 0 1 1 0 8 0 amappl12 168 702 0 671 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 80 0 66 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 0 1 1 0 8 1 amappl8 136 93 0 92 1 0 1 1 0 8 0 amappl7 128 144 0 131 1 0 1 1 0 8 0 amappl6 120 152 0 150 1 0 1 1 0 8 0 amappl5 112 102 0 92 1 0 1 1 0 8 0 amappl4 104 288 0 266 1 0 1 1 0 8 0 amappl3 96 1423 0 1328 3 0 3 3 0 8 0 amappl2 88 551 0 475 2 0 2 2 0 8 0 amappl1 80 10335 0 9719 15 0 15 15 0 8 0 amappl 88 2293 0 2138 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 434 0 401 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 401 1 0 1 1 0 8 0 vmmpekpl 168 5626 0 5595 2 0 2 2 0 8 0 vmmpepl 168 37103 0 35185 85 0 85 85 0 357 1 vmsppl 488 433 0 401 5 0 5 5 0 8 0 rwobjpl 80 14232 0 13216 24 0 24 24 0 8 2 pdppl 4096 875 0 802 101 14 87 87 0 8 14 pvpl 32 9149 0 0 74 0 74 74 0 265 0 pmappl 256 433 0 401 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 412 0 17 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: 0xcfdd8f84860, 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(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff835483af) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3bf880) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c3bf880) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3bf880) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045feed10,fffff8800e156438,ffff80003c3bfa60) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800045feed10,ffff80003c3bfbb0,ffff80003c3bfb00) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 end trace frame: 0xffff80003c3bfba0, 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(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff835483af) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3bf880) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c3bf880) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3bf880) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045feed10,fffff8800e156438,ffff80003c3bfa60) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800045feed10,ffff80003c3bfbb0,ffff80003c3bfb00) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c3bfbb0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3bfbb0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x40e910f0b50, count: -16