*cpu1: uvm_fault(0xfffff6806cce3d78, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x714ccc22cb10, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003bfd1370 rbx 0 rdx 0 rcx 0xffff80003a7b8020 rax 0x3a r8 0xffff80003bfd12a0 r9 0 r10 0x24e0d5ec562ed929 r11 0xdc7fbc27304ed0f6 r12 0 r13 0 r14 0xffff80003a7b8020 r15 0 rip 0xffffffff81c073ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003bfd12f0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=311656 pid=82294 tcnt=3 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=0xffff80003a7b9ca8,0xffff80003a7b87f8 process=0xffff80002a37f9d8 user=0xffff80003bfcc000, vmspace=0xfffff6806cce3b90 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 *82294 311656 41264 0 7 0 0 syz-executor 82294 30552 41264 0 2 0 0x4000080 syz-executor 82294 64510 41264 0 3 0 0x4000080 fsleep syz-executor 84251 396242 96681 0 2 0 0 syz-executor 84251 520287 96681 0 7 0 0x4000000 syz-executor 31242 85428 32231 0 2 0 0 syz-executor 31242 285284 32231 0 2 0 0x4000000 syz-executor 31107 113235 21747 0 2 0 0 syz-executor 31107 398773 21747 0 2 0 0x4000000 syz-executor 10335 504639 58287 0 2 0 0 syz-executor 10335 97303 58287 0 3 0 0x4000080 bell syz-executor 37969 415471 96512 0 2 0 0 syz-executor 37969 114034 96512 0 3 0 0x4000080 fsleep syz-executor 75476 210510 34518 0 3 0 0x80 nanoslp syz-executor 75476 204376 34518 0 3 0 0x4000080 netcon syz-executor 75476 437758 34518 0 3 0 0x4000080 fsleep syz-executor 25012 382062 88891 0 2 0x2 0 syz-executor 58287 137182 88891 0 3 0x2 0x80 nanoslp syz-executor 21747 402242 88891 0 3 0x2 0x80 nanoslp syz-executor 96512 110180 88891 0 3 0x2 0x80 nanoslp syz-executor 34518 377781 88891 0 3 0x2 0x80 nanoslp syz-executor 32231 213405 88891 0 3 0x2 0x80 nanoslp syz-executor 96681 256248 88891 0 3 0x2 0x80 nanoslp syz-executor 41264 446564 88891 0 3 0x2 0x80 nanoslp syz-executor 88891 8952 51120 0 3 0x2 0x80 kqread syz-executor 51120 280834 89618 0 3 0x100002 0x88 sigsusp ksh 89618 86503 19980 0 3 0x10 0x88 kqread sshd-session 19980 127145 43917 0 3 0x12 0x80 kqread sshd-session 76612 430675 1 0 3 0x100003 0x80 ttyin getty 43917 151670 1 0 3 0 0x88 kqread sshd 86665 257651 45410 74 3 0x1100012 0x80 bpf pflogd 45410 400217 1 0 3 0 0x80 sbwait pflogd 45901 343459 52449 73 3 0x1100010 0x80 kqread syslogd 52449 238297 1 0 3 0x100002 0x80 sbwait syslogd 38007 327590 1 0 3 0x100000 0x80 kqread resolvd 6763 119458 38377 77 3 0x100012 0x80 kqread dhcpleased 77489 295384 38377 77 3 0x100012 0x80 kqread dhcpleased 38377 340786 1 0 3 0 0x80 kqread dhcpleased 61745 264719 0 0 3 0x14000 0x200 bored smr 10763 318689 0 0 2 0x14000 0x200 zerothread 20026 168379 0 0 3 0x14000 0x200 aiodoned aiodoned 49575 367753 0 0 3 0x14000 0x200 syncer update 89664 500052 0 0 3 0x14000 0x200 cleaner cleaner 87251 330242 0 0 3 0x14000 0x200 reaper reaper 1434 488168 0 0 3 0x14000 0x200 pgdaemon pagedaemon 15292 242486 0 0 3 0x14000 0x200 bored viomb 81749 246352 0 0 3 0x14000 0x40000200 acpi0 acpi0 43707 290293 0 0 3 0x14000 0x40000200 idle1 50798 168272 0 0 3 0x14000 0x200 bored softnet1 4170 310019 0 0 3 0x14000 0x200 bored softnet0 21818 233495 0 0 3 0x14000 0x200 bored systqmp 86169 79548 0 0 3 0x14000 0x200 bored systq 41421 309940 0 0 3 0x14000 0x200 tmoslp softclockmp 52723 329997 0 0 3 0x14000 0x40000200 tmoslp softclock 16753 213962 0 0 3 0x14000 0x40000200 idle0 1 424381 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 &sched_lock r = 0 (0xffffffff839fabf8) #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 futex_wake+0x245 futex_list_wakeup sys/kern/sys_futex.c:345 [inline] #2 futex_wake+0x245 sys/kern/sys_futex.c:482 #3 sys_futex+0x1d9 sys/kern/sys_futex.c:158 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 Process 82294 (syz-executor) thread 0xffff80003a7b8020 (311656) exclusive rwlock futexlk r = 0 (0xffffffff83a7ece8) #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 futex_wake+0xbc sys/kern/sys_futex.c:467 #3 sys_futex+0x1d9 sys/kern/sys_futex.c:158 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 exclusive mutex &sched_lock r = 0 (0xffffffff839fabf8) #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 futex_wake+0x245 futex_list_wakeup sys/kern/sys_futex.c:345 [inline] #2 futex_wake+0x245 sys/kern/sys_futex.c:482 #3 sys_futex+0x1d9 sys/kern/sys_futex.c:158 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 Process 84251 (syz-executor) thread 0xffff80003a7b87e8 (520287) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a02300) #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 11073 12225K 12413K 166960K 12469 0 pcb 17 12K 12K 166960K 75 0 rtable 191 14K 15K 166960K 399 0 pf 34 17K 21K 166960K 74 0 ifaddr 39 6K 8K 166960K 63 0 ifgroup 55 2K 2K 166960K 88 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1553 0 iov 1 0K 16K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1321 83K 83K 166960K 1577 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 0K 166960K 12 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 93K 166960K 374 0 sigio 0 0K 0K 166960K 7 0 proc 72 115K 196K 166960K 576 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 293 0 in_multi 82 5K 6K 166960K 118 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 417 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 241 159K 173K 166960K 5250 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 43 86K 102K 166960K 1560 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 30 0 NDP 12 0K 1K 166960K 39 0 temp 38 9118K 9194K 166960K 10895 0 kqueue 14 22K 28K 166960K 80 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 78 0 75 2 0 2 2 0 8 1 rtentry 176 121 0 38 5 0 5 5 0 8 0 unpcb 144 171 0 154 3 0 3 3 0 8 2 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 65 0 58 1 0 1 1 0 8 0 arp 136 19 0 4 1 0 1 1 0 8 0 inpcb 328 256 0 245 2 0 2 2 0 8 1 nd6 152 27 0 8 2 0 2 2 0 8 0 pkpcb 40 1 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 11 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 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 46 0 0 1 0 1 1 0 8 0 pfstkey 128 46 0 0 2 0 2 2 0 8 0 pfstate 448 46 0 0 6 0 6 6 0 8 0 pfrule 1360 22 0 16 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 536 0 152 32 0 32 32 0 8 3 art_table 40 538 0 152 6 0 6 6 0 8 0 art_node 32 121 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 10 0 3 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1989 0 526 93 0 93 93 0 8 0 ffsino 296 1989 0 526 114 0 114 114 0 8 0 nchpl 144 2509 0 811 64 0 64 64 0 8 0 vnodes 216 2221 0 0 124 0 124 124 0 8 0 namei 1024 8212 0 8212 2 0 2 2 0 8 2 percpumem 16 66 0 15 1 0 1 1 0 8 0 kstatmem 264 51 0 22 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8794 0 8794 10 2 8 8 1 8 8 plimitpl 152 65 0 47 1 0 1 1 0 8 0 sigapl 424 700 0 652 7 0 7 7 0 8 1 knotepl 120 308 0 0 10 0 10 10 0 8 0 kqueuepl 224 100 0 90 2 0 2 2 0 8 1 pipepl 344 145 0 117 3 0 3 3 0 8 0 fdescpl 528 684 0 652 3 0 3 3 0 8 0 filepl 160 3184 0 2897 15 0 15 15 0 8 1 lockfpl 104 183 0 179 1 0 1 1 0 8 0 lockfspl 48 58 0 54 1 0 1 1 0 8 0 sessionpl 144 64 0 55 1 0 1 1 0 8 0 pgrppl 48 72 0 55 1 0 1 1 0 8 0 ucredpl 104 336 0 323 1 0 1 1 0 8 0 zombiepl 144 653 0 652 1 0 1 1 0 8 0 processpl 1232 700 0 652 5 0 5 5 0 8 1 procpl 664 1120 0 1063 6 0 6 6 0 8 0 sockpl 752 515 0 483 8 0 8 8 0 8 4 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mextrefs 64 24 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 171 0 0 11 0 11 11 0 8 0 bufpl 272 2869 0 108 185 0 185 185 0 8 0 anonpl 32 7677 0 0 62 0 62 62 0 247 0 amapchunkpl 152 15683 0 15167 28 0 28 28 0 158 7 amappl16 200 1917 0 1888 17 7 10 15 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 443 0 441 1 0 1 1 0 8 0 amappl13 176 158 0 146 1 0 1 1 0 8 0 amappl12 168 937 0 906 2 0 2 2 0 8 0 amappl11 160 34 0 34 1 1 0 1 0 8 0 amappl10 152 65 0 50 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 152 0 138 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 97 0 86 1 0 1 1 0 8 0 amappl4 104 316 0 296 1 0 1 1 0 8 0 amappl3 96 2831 0 2728 3 0 3 3 0 8 0 amappl2 88 831 0 752 2 0 2 2 0 8 0 amappl1 80 11468 0 10864 14 0 14 14 0 8 1 amappl 88 4456 0 4287 5 0 5 5 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 684 0 652 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 684 0 652 1 0 1 1 0 8 0 vmmpekpl 168 7455 0 7421 2 0 2 2 0 8 0 vmmpepl 168 51588 0 49616 98 0 98 98 0 357 11 vmsppl 488 683 0 652 5 0 5 5 0 8 1 rwobjpl 80 17218 0 16159 28 0 28 28 0 8 4 pdppl 4096 1375 0 1304 101 28 73 85 0 8 2 pvpl 32 14490 0 0 117 0 117 117 0 265 0 pmappl 256 683 0 652 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 466 0 30 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: 0x714ccc22cb10, 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+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,d) at comcnputc+0x29b sys/dev/ic/com.c:1274 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff834626a5) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351ee28) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3e3a50,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3e3a50) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003a7b87e8,fffff68069b512b8,ffff80003c3e3c30) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003c3e3ca0, 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+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,d) at comcnputc+0x29b sys/dev/ic/com.c:1274 db_putchar(a) at db_putchar+0x498 sys/ddb/db_output.c:168 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff834626a5) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351ee28) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3e3a50,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3e3a50) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003a7b87e8,fffff68069b512b8,ffff80003c3e3c30) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80003a7b87e8,ffff80003c3e3d80,ffff80003c3e3cd0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c3e3d80) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e3d80) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8ed059aa2e0, count: -17