*cpu0: uvm_fault(0xffffef006cee4200, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x76cdcc775360, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800039ba36c0 rbx 0 rdx 0 rcx 0xffff80003b3b9ca8 rax 0x32 r8 0xffff800039ba35f0 r9 0x80713 acpi_pdirpa+0x6c584 r10 0xf7d46f0fe4a411f9 r11 0x983de039a81b97ce r12 0 r13 0 r14 0xffff80003b3b9ca8 r15 0 rip 0xffffffff8299e3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800039ba3640 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=154423 pid=16504 tcnt=1 stat=onproc flags process=0 proc=0 runpri=55, usrpri=55, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b3b9a10,0xffffffff83a01cb0 process=0xffff80002a37eb68 user=0xffff800039b9e000, vmspace=0xffffef006cee4018 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *16504 154423 46205 0 7 0 0 syz-executor 31883 238072 5406 0 2 0 0 syz-executor 31883 47161 5406 0 7 0 0x4000000 syz-executor 5901 413853 64968 0 2 0x100000 0 sh 31555 122446 37673 0 2 0 0 syz-executor 31555 301515 37673 0 3 0 0x4000080 fsleep syz-executor 61496 492847 50596 0 2 0 0 syz-executor 61496 154809 50596 0 3 0 0x4000080 fsleep syz-executor 35322 499047 48182 0 2 0x2 0 ndp 48182 408680 87905 0 3 0x100002 0x88 sigsusp sh 64968 391442 1745 0 3 0x100002 0x88 sigsusp sh 49440 296435 67300 0 3 0x100002 0x80 sbwait arp 67300 504195 44260 0 3 0x100002 0x88 sigsusp sh 46205 174031 88272 0 3 0x2 0x80 nanoslp syz-executor 1745 94957 88272 0 3 0x2 0x80 wait syz-executor 5406 396170 88272 0 3 0x2 0x80 nanoslp syz-executor 87905 435427 88272 0 3 0x2 0x80 wait syz-executor 37673 114556 88272 0 3 0x2 0x80 nanoslp syz-executor 44260 213946 88272 0 3 0x2 0x80 wait syz-executor 50596 439575 88272 0 3 0x2 0x80 nanoslp syz-executor 82256 516062 88272 0 2 0x2 0 syz-executor 88272 326787 74314 0 3 0x2 0x80 kqread syz-executor 74314 318791 11260 0 3 0x100002 0x88 sigsusp ksh 11260 22225 79014 0 3 0x10 0x88 kqread sshd-session 79014 373381 73691 0 3 0x12 0x80 kqread sshd-session 92105 482001 1 0 3 0x100003 0x80 ttyin getty 73691 277824 1 0 3 0 0x88 kqread sshd 46737 440930 35756 74 3 0x1100012 0x80 bpf pflogd 35756 225757 1 0 3 0 0x80 sbwait pflogd 9826 63229 19127 73 3 0x1100010 0x80 kqread syslogd 19127 21194 1 0 3 0x100002 0x80 sbwait syslogd 95945 406077 1 0 3 0x100000 0x80 kqread resolvd 23268 12982 13380 77 3 0x100012 0x80 kqread dhcpleased 46164 331925 13380 77 3 0x100012 0x80 kqread dhcpleased 13380 135149 1 0 3 0 0x80 kqread dhcpleased 26829 102574 0 0 3 0x14000 0x200 bored smr 64054 519847 0 0 2 0x14000 0x200 zerothread 5785 125727 0 0 3 0x14000 0x200 aiodoned aiodoned 73978 13401 0 0 3 0x14000 0x200 syncer update 51294 509277 0 0 3 0x14000 0x200 cleaner cleaner 3277 443009 0 0 3 0x14000 0x200 reaper reaper 37810 494036 0 0 3 0x14000 0x200 pgdaemon pagedaemon 29631 20652 0 0 3 0x14000 0x200 bored viomb 52625 7355 0 0 3 0x14000 0x40000200 acpi0 acpi0 59772 70419 0 0 3 0x14000 0x40000200 idle1 55154 352166 0 0 3 0x14000 0x200 bored softnet1 844 387507 0 0 2 0x14000 0x200 softnet0 21255 501613 0 0 3 0x14000 0x200 smrbar systqmp 91362 126611 0 0 3 0x14000 0x200 bored systq 20806 266819 0 0 3 0x14000 0x200 tmoslp softclockmp 13906 490112 0 0 3 0x14000 0x40000200 tmoslp softclock 65654 134707 0 0 3 0x14000 0x40000200 idle0 1 211499 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 &map->flags_lock r = 0 (0xffffef006cee4190) #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+0x13f sys/uvm/uvm_map.c:5171 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 16504 (syz-executor) thread 0xffff80003b3b9ca8 (154423) exclusive rwlock vmmaplk r = 0 (0xffffef006cee4118) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive mutex &map->flags_lock r = 0 (0xffffef006cee4190) #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+0x13f sys/uvm/uvm_map.c:5171 #3 uvm_mapanon+0x28f sys/uvm/uvm_map.c:-1 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1029 #5 sys_mmap+0xa80 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 31883 (syz-executor) thread 0xffff80003b3b9a10 (47161) 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 Process 82256 (syz-executor) thread 0xffff80002a222540 (516062) exclusive rrwlock inode r = 0 (0xffffef006d12b0c0) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xffffef0073b32300) #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #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 Process 21255 (systqmp) thread 0xffff800045ffe530 (501613) shared rwlock systqmp r = 0 (0xffffffff839008f8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12150K 12157K 166960K 12153 0 pcb 17 12K 12K 166960K 21 0 rtable 203 5K 5K 166960K 299 0 pf 34 17K 18K 166960K 45 0 ifaddr 39 6K 6K 166960K 41 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 1482 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 81K 166960K 1366 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 20 73K 93K 166960K 131 0 proc 70 115K 163K 166960K 538 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 79 5K 5K 166960K 79 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 373 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 217 162K 169K 166960K 2931 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 47 94K 104K 166960K 1266 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 22 1K 1K 166960K 24 0 temp 34 9114K 9120K 166960K 3814 0 kqueue 13 20K 22K 166960K 27 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 29 0 25 1 0 1 1 0 8 0 rtentry 176 94 0 1 5 0 5 5 0 8 0 unpcb 144 42 0 23 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 16 0 0 1 0 1 1 0 8 0 inpcb 328 67 0 60 1 0 1 1 0 8 0 nd6 152 17 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 17 0 0 1 0 1 1 0 8 0 pfstkey 128 17 0 0 1 0 1 1 0 8 0 pfstate 448 17 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 256 370 0 0 24 0 24 24 0 8 0 art_table 40 371 0 0 4 0 4 4 0 8 0 art_node 32 94 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1567 0 100 92 0 92 92 0 8 0 ffsino 296 1567 0 100 113 0 113 113 0 8 0 nchpl 144 1765 0 65 63 0 63 63 0 8 0 vnodes 216 1661 0 0 93 0 93 93 0 8 0 namei 1024 5359 0 5358 1 0 1 1 0 8 0 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 6129 0 6129 3 2 1 2 1 8 1 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 448 0 398 7 0 7 7 0 8 0 knotepl 120 297 0 0 9 0 9 9 0 8 0 kqueuepl 224 23 0 14 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 432 0 398 3 0 3 3 0 8 0 filepl 160 1560 0 1345 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 83 0 70 1 0 1 1 0 8 0 zombiepl 144 398 0 398 1 0 1 1 0 8 1 processpl 1232 448 0 398 5 0 5 5 0 8 0 procpl 664 457 0 404 5 0 5 5 0 8 0 sockpl 752 139 0 109 4 0 4 4 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 128 0 0 16 0 16 16 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mextrefs 64 28 0 0 1 0 1 1 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 13 0 13 13 0 8 0 bufpl 272 2277 0 105 145 0 145 145 0 8 0 anonpl 32 3801 0 0 31 0 31 31 0 247 0 amapchunkpl 152 8043 0 7633 17 0 17 17 0 158 0 amappl16 200 1791 0 1781 5 0 5 5 0 8 4 amappl15 192 12 0 11 1 0 1 1 0 8 0 amappl14 184 421 0 416 1 0 1 1 0 8 0 amappl13 176 169 0 155 1 0 1 1 0 8 0 amappl12 168 678 0 646 2 0 2 2 0 8 0 amappl11 160 40 0 40 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 275 0 275 1 0 1 1 0 8 1 amappl8 136 93 0 91 1 0 1 1 0 8 0 amappl7 128 143 0 128 1 0 1 1 0 8 0 amappl6 120 147 0 143 1 0 1 1 0 8 0 amappl5 112 99 0 88 1 0 1 1 0 8 0 amappl4 104 287 0 267 1 0 1 1 0 8 0 amappl3 96 1397 0 1312 3 0 3 3 0 8 0 amappl2 88 556 0 480 2 0 2 2 0 8 0 amappl1 80 10382 0 9732 15 0 15 15 0 8 0 amappl 88 2229 0 2090 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 24 432 0 398 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 432 0 398 1 0 1 1 0 8 0 vmmpekpl 168 5574 0 5543 2 0 2 2 0 8 0 vmmpepl 168 37442 0 35554 87 0 87 87 0 357 1 vmsppl 488 431 0 398 5 0 5 5 0 8 0 rwobjpl 80 14265 0 13211 24 0 24 24 0 8 0 pdppl 4096 871 0 796 97 16 81 85 0 8 6 pvpl 32 9744 0 0 79 0 79 79 0 265 0 pmappl 256 431 0 398 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 410 0 19 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83905ff0) 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 comcnputc(800,d) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,d) at comcnputc+0x250 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(ffffffff8346220f) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83525b88) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003378afa0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003378afa0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003b3b9a10,ffffef006cc96b00,ffff80003378b160) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff80003b3b9a10,ffff80003378b2b0,ffff80003378b200) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003378b2b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003378b2b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 end trace frame: 0xffff80003378b330, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83905ff0) 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 comcnputc(800,d) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,d) at comcnputc+0x250 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(ffffffff8346220f) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83525b88) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003378afa0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003378afa0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003b3b9a10,ffffef006cc96b00,ffff80003378b160) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff80003b3b9a10,ffff80003378b2b0,ffff80003378b200) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003378b2b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003378b2b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9b167798340, count: -15 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x76cdcc775360, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x76cdcc775360, count: -1