*cpu1: uvm_fault(0xfffffd006f3637a8, 0x98, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7957fc914a00, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a318d20 rbx 0 rdx 0 rcx 0xffff8000fffef770 rax 0x2a r8 0xffff80002a318c50 r9 0 r10 0x4a1304de6bc2b201 r11 0x1c0a0f5a62a85b79 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff819f84c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a318ca0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=343980 pid=18359 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffefca0,0xffffffff83b101e8 process=0xffff800032398020 user=0xffff80002a313000, vmspace=0xfffffd006c646b88 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *18359 343980 18179 0 7 0 syz-executor 6207 210192 15046 0 2 0 syz-executor 6207 155053 15046 0 3 0x4000080 fsleep syz-executor 16010 80025 52069 0 2 0 syz-executor 16010 460145 52069 0 2 0x4000000 syz-executor 45531 196763 3836 0 2 0 syz-executor 45531 154242 3836 0 3 0x4000080 fsleep syz-executor 49568 93962 19902 0 2 0 syz-executor 49568 414363 19902 0 7 0x4000000 syz-executor 49568 355082 19902 0 3 0x4000080 fsleep syz-executor 58056 19236 99818 0 3 0x80 nanoslp syz-executor 58056 209985 99818 0 3 0x4000080 pppxread syz-executor 14890 104495 32961 0 3 0x80 nanoslp syz-executor 14890 499390 32961 0 3 0x4000080 ttyout syz-executor 14890 290557 32961 0 3 0x4000080 fsleep syz-executor 52069 289281 61421 0 3 0x82 nanoslp syz-executor 49248 459556 36244 0 3 0x80 nanoslp syz-executor 49248 340397 36244 0 3 0x4000080 ttyin syz-executor 49248 514986 36244 0 3 0x4000080 fsleep syz-executor 49248 221484 36244 0 3 0x4000080 fsleep syz-executor 15046 213554 61421 0 3 0x82 nanoslp syz-executor 19902 398299 61421 0 3 0x82 nanoslp syz-executor 36244 89098 61421 0 3 0x82 nanoslp syz-executor 32961 348334 61421 0 3 0x82 nanoslp syz-executor 18179 289020 61421 0 3 0x82 nanoslp syz-executor 3836 316130 61421 0 3 0x82 nanoslp syz-executor 99818 61656 61421 0 3 0x82 nanoslp syz-executor 61421 55877 25363 0 3 0x82 kqread syz-executor 25363 111982 89667 0 3 0x10008a sigsusp ksh 89667 217707 57722 0 3 0x98 kqread sshd-session 57722 410630 30729 0 3 0x92 kqread sshd-session 58055 498831 1 0 3 0x100083 ttyopn getty 30729 345207 1 0 3 0x88 kqread sshd 20155 417401 7065 74 3 0x1100092 bpf pflogd 7065 145743 1 0 3 0x80 sbwait pflogd 80061 12240 60680 73 3 0x1100090 kqread syslogd 60680 301492 1 0 3 0x100082 sbwait syslogd 48659 356896 1 0 3 0x100080 kqread resolvd 87250 489442 68755 77 3 0x100092 kqread dhcpleased 50223 316963 68755 77 3 0x100092 kqread dhcpleased 68755 343690 1 0 3 0x80 kqread dhcpleased 21318 226194 0 0 3 0x14200 bored smr 2182 478544 0 0 2 0x14200 zerothread 6739 242513 0 0 3 0x14200 aiodoned aiodoned 5436 47547 0 0 3 0x14200 syncer update 56654 26194 0 0 3 0x14200 cleaner cleaner 83885 456413 0 0 3 0x14200 reaper reaper 29271 219230 0 0 3 0x14200 pgdaemon pagedaemon 85514 288796 0 0 3 0x14200 bored viomb 31495 209193 0 0 3 0x40014200 acpi0 acpi0 93830 159834 0 0 3 0x40014200 idle1 24118 474310 0 0 3 0x14200 bored softnet1 93780 53920 0 0 3 0x14200 bored softnet0 16541 49333 0 0 3 0x14200 smrbar systqmp 35536 516306 0 0 3 0x14200 bored systq 60715 406781 0 0 3 0x14200 tmoslp softclockmp 56209 277168 0 0 3 0x40014200 tmoslp softclock 18885 282953 0 0 3 0x40014200 idle0 1 474015 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd006c669e10) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 18359 (syz-executor) thread 0xffff8000fffef770 (343980) exclusive rwlock amaplk r = 0 (0xfffffd006c473e60) #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 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd006c646c88) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd006c669e10) #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 pmap_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 49568 (syz-executor) thread 0xffff80003c3fa7f0 (414363) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a102c0) #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 16541 (systqmp) thread 0xffff8000ffffe7c8 (49333) shared rwlock systqmp r = 0 (0xffffffff839cc6e8) #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 11074 12105K 12409K 166960K 12721 0 pcb 18 12K 12K 166960K 70 0 rtable 208 7K 9K 166960K 474 0 pf 32 17K 24K 166960K 133 0 ifaddr 36 6K 7K 166960K 64 0 ifgroup 51 2K 2K 166960K 84 0 sysctl 2 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 90 0 ioctlops 0 0K 4K 166960K 1536 0 iov 0 0K 16K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1386 87K 87K 166960K 1813 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 24 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 418 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 180K 166960K 633 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 77 5K 7K 166960K 129 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 473 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 238 159K 177K 166960K 5463 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 43 86K 103K 166960K 1666 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 15 0 NDP 13 0K 2K 166960K 42 0 temp 48 9120K 9184K 166960K 18781 0 kqueue 13 20K 32K 166960K 70 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 92 0 88 2 0 2 2 0 8 1 rtentry 176 140 0 51 6 0 6 6 0 8 0 unpcb 144 160 0 143 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 103 0 98 4 0 4 4 0 8 3 arp 136 22 0 8 1 0 1 1 0 8 0 inpcb 328 341 0 331 4 0 4 4 0 8 2 nd6 152 33 0 14 2 0 2 2 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 6 0 6 1 0 1 1 0 8 1 pffrag 232 5 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 10 0 7 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 pfrktable 1344 8 0 8 1 0 1 1 0 8 1 pfanchor 1288 7 0 1 1 0 1 1 0 8 0 pftag 88 1 0 1 1 0 1 1 0 8 1 pfstitem 24 36 0 0 1 0 1 1 0 8 0 pfstkey 128 36 0 0 2 0 2 2 0 8 0 pfstate 448 36 0 0 4 0 4 4 0 8 0 pfrule 1360 29 0 23 2 0 2 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 601 0 226 31 0 31 31 0 8 6 art_table 40 603 0 226 5 0 5 5 0 8 0 art_node 32 140 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semapl 72 20 0 10 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2033 0 564 93 0 93 93 0 8 0 ffsino 296 2033 0 564 114 0 114 114 0 8 0 nchpl 144 2594 0 883 64 0 64 64 0 8 0 vnodes 216 2500 0 0 139 0 139 139 0 8 0 namei 1024 8937 0 8937 2 1 1 2 0 8 1 percpumem 16 60 0 11 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1 kstatmem 264 49 0 22 3 0 3 3 0 8 1 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 9260 0 9260 10 3 7 7 1 8 7 plimitpl 152 62 0 44 1 0 1 1 0 8 0 sigapl 424 742 0 694 7 1 6 7 0 8 0 knotepl 120 307 0 0 10 0 10 10 0 8 0 kqueuepl 224 97 0 88 1 0 1 1 0 8 0 pipepl 344 156 0 129 3 0 3 3 0 8 0 fdescpl 528 726 0 694 3 0 3 3 0 8 0 filepl 160 3574 0 3352 13 0 13 13 0 8 3 lockfpl 104 451 0 449 2 0 2 2 0 8 1 lockfspl 48 222 0 220 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 50 0 33 1 0 1 1 0 8 0 ucredpl 104 424 0 410 1 0 1 1 0 8 0 zombiepl 144 694 0 694 1 0 1 1 0 8 1 processpl 1232 742 0 694 5 0 5 5 0 8 0 procpl 664 1157 0 1098 6 0 6 6 0 8 0 sockpl 752 601 0 570 7 0 7 7 0 8 2 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 214 0 0 13 0 13 13 0 8 0 bufpl 272 3184 0 105 206 0 206 206 0 8 0 anonpl 32 9252 0 0 75 0 75 75 0 246 0 amapchunkpl 152 16521 0 16007 26 0 26 26 0 158 5 amappl16 200 2653 0 2622 22 11 11 20 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 464 0 463 1 0 1 1 0 8 0 amappl13 176 131 0 119 1 0 1 1 0 8 0 amappl12 168 993 0 960 2 0 2 2 0 8 0 amappl11 160 37 0 37 1 1 0 1 0 8 0 amappl10 152 74 0 60 1 0 1 1 0 8 0 amappl9 144 278 0 277 1 0 1 1 0 8 0 amappl8 136 105 0 103 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 174 0 172 1 0 1 1 0 8 0 amappl5 112 103 0 92 1 0 1 1 0 8 0 amappl4 104 315 0 294 1 0 1 1 0 8 0 amappl3 96 3276 0 3151 4 0 4 4 0 8 0 amappl2 88 596 0 533 2 0 2 2 0 8 0 amappl1 80 12375 0 11768 16 0 16 16 0 8 2 amappl 88 4624 0 4457 5 0 5 5 0 92 0 uvmvnodes 80 107 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 128 255 0 255 2 1 1 1 0 8 1 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 726 0 694 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 726 0 694 1 0 1 1 0 8 0 vmmpekpl 168 7965 0 7921 3 0 3 3 0 8 0 vmmpepl 168 55849 0 53873 101 0 101 101 0 357 14 vmsppl 488 725 0 694 5 0 5 5 0 8 0 rwobjpl 80 19016 0 17944 29 0 29 29 0 8 4 pdppl 4096 1459 0 1388 105 32 73 85 0 8 2 pvpl 32 17191 0 0 140 1 139 139 0 265 0 pmappl 256 725 0 694 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 494 0 35 14 0 14 14 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7957fc914a00, 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,a) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,a) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,a) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 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(ffffffff8345deda) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83521656) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000393a37c0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000393a37c0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3fa7f0,fffffd005fd59118,ffff8000393a3980) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 end trace frame: 0xffff8000393a39f0, 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,a) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,a) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,a) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 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(ffffffff8345deda) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83521656) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000393a37c0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000393a37c0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3fa7f0,fffffd005fd59118,ffff8000393a3980) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimens(ffff80003c3fa7f0,ffff8000393a3ad0,ffff8000393a3a20) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766 syscall(ffff8000393a3ad0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000393a3ad0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75b1e994d50, count: -17