*cpu1: uvm_fault(0xfffffb006cd585d8, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7ab292309a00, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003abd01b0 rbx 0 rdx 0 rcx 0xffff800039b9ca80 rax 0x3b r8 0xffff80003abd00e0 r9 0 r10 0x8abb0da1896b1d99 r11 0x67f0734e4de497ca r12 0 r13 0 r14 0xffff800039b9ca80 r15 0 rip 0xffffffff81d9c3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003abd0130 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=382355 pid=32710 tcnt=3 stat=onproc flags process=0 proc=0 runpri=72, usrpri=72, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800039b9d778,0xffff800045fef780 process=0xffff800045fe5360 user=0xffff80003abcb000, vmspace=0xfffffb006cd585d8 estcpu=22, cpticks=107, pctcpu=1.3, user=3, sys=1, intr=103 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 93704 473657 90653 0 2 0 0 syz-executor 93704 108308 90653 0 3 0 0x4000080 fsleep syz-executor 53583 490562 21724 0 2 0 0 syz-executor 53583 321300 21724 0 3 0 0x4000080 fsleep syz-executor 24559 345500 46507 0 2 0 0 syz-executor 24559 433294 46507 0 3 0 0x4000080 fsleep syz-executor 10621 399674 47626 0 2 0 0 syz-executor 10621 342138 47626 0 3 0 0x4000080 fsleep syz-executor *32710 382355 86079 0 7 0 0 syz-executor 32710 489518 86079 0 7 0 0x4000000 syz-executor 32710 92857 86079 0 3 0 0x4000080 fsleep syz-executor 58047 111906 90155 0 2 0 0 syz-executor 96834 412745 93716 0 2 0x2 0 ndp 93716 130350 36935 0 3 0x100002 0x88 sigsusp sh 21724 49793 61977 0 3 0x2 0x80 nanoslp syz-executor 86079 488688 61977 0 3 0x2 0x80 nanoslp syz-executor 46507 20647 61977 0 3 0x2 0x80 nanoslp syz-executor 36935 374521 61977 0 3 0x2 0x80 wait syz-executor 47626 112144 61977 0 3 0x2 0x80 nanoslp syz-executor 90155 190814 61977 0 3 0x2 0x80 nanoslp syz-executor 90653 17735 61977 0 3 0x2 0x80 nanoslp syz-executor 72823 29830 61977 0 3 0x2 0 biowait syz-executor 61977 459355 44112 0 3 0x2 0x80 kqread syz-executor 44112 196857 7414 0 3 0x100002 0x88 sigsusp ksh 7414 446324 14981 0 3 0x10 0x88 kqread sshd-session 14981 426934 39986 0 3 0x12 0x80 kqread sshd-session 90670 485708 1 0 3 0x100003 0x80 ttyin getty 39986 346760 1 0 3 0 0x88 kqread sshd 7253 270389 67512 74 3 0x1100012 0x80 bpf pflogd 67512 84170 1 0 3 0 0x80 sbwait pflogd 78755 355635 55514 73 3 0x1100010 0x80 kqread syslogd 55514 241247 1 0 3 0x100002 0x80 sbwait syslogd 36630 419568 1 0 3 0x100000 0x80 kqread resolvd 49819 257080 38375 77 3 0x100012 0x80 kqread dhcpleased 8278 323012 38375 77 3 0x100012 0x80 kqread dhcpleased 38375 153929 1 0 3 0 0x80 kqread dhcpleased 36496 22406 0 0 3 0x14000 0x200 bored smr 25124 20604 0 0 2 0x14000 0x200 zerothread 58552 271151 0 0 3 0x14000 0x200 aiodoned aiodoned 18571 78033 0 0 3 0x14000 0x200 syncer update 72163 469731 0 0 3 0x14000 0x200 cleaner cleaner 29629 91513 0 0 3 0x14000 0x200 reaper reaper 99751 62654 0 0 3 0x14000 0x200 pgdaemon pagedaemon 47190 74007 0 0 3 0x14000 0x200 bored viomb 97353 423991 0 0 3 0x14000 0x40000200 acpi0 acpi0 73638 337209 0 0 3 0x14000 0x40000200 idle1 27257 57520 0 0 3 0x14000 0x200 bored softnet1 88427 222682 0 0 3 0x14000 0x200 bored softnet0 78688 88378 0 0 3 0x14000 0x200 bored systqmp 97460 185421 0 0 3 0x14000 0x200 bored systq 80001 22665 0 0 3 0x14000 0x200 tmoslp softclockmp 45021 73989 0 0 3 0x14000 0x40000200 tmoslp softclock 22575 133093 0 0 3 0x14000 0x40000200 idle0 1 367223 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 (0xffffffff83ae3390) #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 sleep_setup+0xed sys/kern/kern_synch.c:304 #3 sys_futex+0xb73 futex_wait sys/kern/sys_futex.c:306 [inline] #3 sys_futex+0xb73 sys/kern/sys_futex.c:155 #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 32710 (syz-executor) thread 0xffff800045fef770 (489518) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3ce40) #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 72823 (syz-executor) thread 0xffff80002a222d08 (29830) exclusive rrwlock inode r = 0 (0xfffffb006cd18318) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffb006e154550) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11094 12246K 12246K 166960K 12333 0 pcb 17 12K 12K 166960K 24 0 rtable 244 8K 8K 166960K 369 0 pf 34 17K 24K 166960K 82 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 55 2K 2K 166960K 59 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1487 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1386 87K 87K 166960K 1475 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 5 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 93K 166960K 154 0 proc 71 131K 147K 166960K 553 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 1 0 in_multi 99 6K 6K 166960K 101 0 ether_multi 1 0K 0K 166960K 3 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 31 148K 148K 166960K 31 0 exec 0 0K 1K 166960K 393 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 214 159K 167K 166960K 3276 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 44 88K 104K 166960K 1340 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 12 0K 2K 166960K 30 0 temp 35 9114K 9178K 166960K 4115 0 kqueue 14 22K 24K 166960K 29 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 37 0 33 1 0 1 1 0 8 0 rtentry 176 110 0 1 5 0 5 5 0 8 0 unpcb 144 54 0 35 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 14 0 10 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 80 0 73 2 0 2 2 0 8 1 nd6 152 23 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 3 0 3 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 6 0 6 1 0 1 1 0 8 1 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 20 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 110 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 4 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1604 0 136 92 0 92 92 0 8 0 ffsino 296 1604 0 136 114 0 114 114 0 8 0 nchpl 144 1819 0 119 64 0 64 64 0 8 0 vnodes 216 1799 0 0 100 0 100 100 0 8 0 namei 1024 5698 0 5698 1 0 1 1 0 8 1 percpumem 16 54 0 3 1 0 1 1 0 8 0 kstatmem 264 31 0 4 3 0 3 3 0 8 1 scxspl 216 6425 0 6424 4 3 1 3 1 8 0 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 480 0 432 7 0 7 7 0 8 1 knotepl 120 53 0 0 2 0 2 2 0 8 0 kqueuepl 224 26 0 16 1 0 1 1 0 8 0 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 464 0 432 3 0 3 3 0 8 0 filepl 160 1761 0 1510 14 0 14 14 0 8 3 lockfpl 104 140 0 138 2 0 2 2 0 8 1 lockfspl 48 71 0 69 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 88 0 75 1 0 1 1 0 8 0 zombiepl 144 432 0 432 1 0 1 1 0 8 1 processpl 1232 480 0 432 5 0 5 5 0 8 0 procpl 664 506 0 452 5 0 5 5 0 8 0 sockpl 752 171 0 141 4 0 4 4 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mextrefs 64 26 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 186 0 0 12 0 12 12 0 8 0 bufpl 272 2313 0 106 148 0 148 148 0 8 0 anonpl 32 7325 0 0 60 0 60 60 0 247 0 amapchunkpl 152 8903 0 8497 18 0 18 18 0 158 1 amappl16 200 2035 0 2019 13 0 13 13 0 8 7 amappl15 192 23 0 23 1 1 0 1 0 8 0 amappl14 184 444 0 442 1 0 1 1 0 8 0 amappl13 176 130 0 117 1 0 1 1 0 8 0 amappl12 168 736 0 706 2 0 2 2 0 8 0 amappl11 160 93 0 92 1 0 1 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 289 0 288 1 0 1 1 0 8 0 amappl8 136 113 0 111 1 0 1 1 0 8 0 amappl7 128 161 0 147 1 0 1 1 0 8 0 amappl6 120 200 0 198 1 0 1 1 0 8 0 amappl5 112 103 0 92 1 0 1 1 0 8 0 amappl4 104 296 0 276 1 0 1 1 0 8 0 amappl3 96 1575 0 1493 3 0 3 3 0 8 0 amappl2 88 597 0 522 2 0 2 2 0 8 0 amappl1 80 10616 0 9980 16 1 15 16 0 8 0 amappl 88 2525 0 2386 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 464 0 432 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 464 0 432 1 0 1 1 0 8 0 vmmpekpl 168 5834 0 5801 2 0 2 2 0 8 0 vmmpepl 168 40379 0 38495 96 0 96 96 0 357 4 vmsppl 488 463 0 432 5 0 5 5 0 8 0 rwobjpl 80 15061 0 14034 27 0 27 27 0 8 0 pdppl 4096 935 0 864 97 22 75 85 0 8 4 pvpl 32 14143 0 0 115 0 115 115 0 265 0 pmappl 256 463 0 432 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 417 0 25 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: 0x7ab292309a00, 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(800,61) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,61) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b3715) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3e85a0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3e85a0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3e85a0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fef770,fffffb006c91ce60,ffff80003c3e8760) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fef770,ffff80003c3e88b0,ffff80003c3e8800) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 end trace frame: 0xffff80003c3e88a0, 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(800,61) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,61) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(61) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(61) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834b3715) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c3e85a0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80003c3e85a0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c3e85a0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fef770,fffffb006c91ce60,ffff80003c3e8760) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fef770,ffff80003c3e88b0,ffff80003c3e8800) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003c3e88b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e88b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x675988c6170, count: -16