*cpu1: uvm_fault(0xfffffd006c6c65d0, 0x98, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x798b10061560, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003539a390 rbx 0 rdx 0 rcx 0xffff80003c401cb0 rax 0x2a r8 0xffff80003539a2c0 r9 0x7bc11303001 r10 0x366b63f199b7d69e r11 0x4726978e32941ac6 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8322f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003539a310 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=453378 pid=96066 tcnt=1 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=0xffff80003c4014e8,0xffffffff83a14708 process=0xffff8000fffea698 user=0xffff800035395000, vmspace=0xfffffd006c6c6018 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *96066 453378 1453 0 7 0 syz-executor 69031 112460 44338 0 2 0 syz-executor 69031 219850 44338 0 2 0x4000000 syz-executor 6321 394850 28260 0 2 0 syz-executor 6321 411201 28260 0 7 0x4000000 syz-executor 27060 124273 10419 0 2 0 syz-executor 27060 237986 10419 0 3 0x4000080 fsleep syz-executor 3302 47538 72334 0 2 0 syz-executor 3302 160471 72334 0 3 0x4000080 fsleep syz-executor 11450 458664 85836 0 2 0 syz-executor 11450 408041 85836 0 3 0x4000080 fsleep syz-executor 93475 514556 15381 0 2 0 syz-executor 93475 287767 15381 0 3 0x4000080 fsleep syz-executor 41066 453298 69577 0 2 0 syz-executor 41066 373436 69577 0 3 0x4000080 fsleep syz-executor 85836 432108 80949 0 3 0x82 nanoslp syz-executor 44338 433319 80949 0 2 0x2 syz-executor 10419 59200 80949 0 3 0x82 nanoslp syz-executor 1453 311477 80949 0 3 0x82 nanoslp syz-executor 72334 108864 80949 0 3 0x82 nanoslp syz-executor 69577 463313 80949 0 3 0x82 nanoslp syz-executor 28260 78423 80949 0 3 0x82 nanoslp syz-executor 15381 146647 80949 0 3 0x82 nanoslp syz-executor 80949 471151 53464 0 3 0x82 kqread syz-executor 53464 322307 71663 0 3 0x10008a sigsusp ksh 71663 365379 93569 0 3 0x98 kqread sshd-session 93569 44147 81664 0 3 0x92 kqread sshd-session 88838 253095 1 0 3 0x100083 ttyin getty 81664 471739 1 0 3 0x88 kqread sshd 31022 256074 43653 74 3 0x1100092 bpf pflogd 43653 6653 1 0 3 0x80 sbwait pflogd 402 402471 74565 73 3 0x1100090 kqread syslogd 74565 276353 1 0 3 0x100082 sbwait syslogd 14445 83019 1 0 3 0x100080 kqread resolvd 48286 384908 49411 77 3 0x100092 kqread dhcpleased 29610 239861 49411 77 3 0x100092 kqread dhcpleased 49411 262800 1 0 3 0x80 kqread dhcpleased 99740 76519 0 0 3 0x14200 bored smr 99931 420336 0 0 2 0x14200 zerothread 12820 484384 0 0 3 0x14200 aiodoned aiodoned 75637 14914 0 0 3 0x14200 syncer update 94369 160850 0 0 3 0x14200 cleaner cleaner 43610 486728 0 0 3 0x14200 reaper reaper 89993 449135 0 0 3 0x14200 pgdaemon pagedaemon 87999 304175 0 0 3 0x14200 bored viomb 60392 285301 0 0 3 0x40014200 acpi0 acpi0 10469 503824 0 0 3 0x40014200 idle1 20905 66008 0 0 3 0x14200 bored softnet1 8015 95607 0 0 3 0x14200 bored softnet0 11510 80191 0 0 3 0x14200 bored systqmp 8853 178719 0 0 3 0x14200 bored systq 93041 17078 0 0 3 0x14200 tmoslp softclockmp 13825 102133 0 0 3 0x40014200 tmoslp softclock 6288 146548 0 0 3 0x40014200 idle0 1 224567 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 (0xfffffd006c4cd910) #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_upper+0x338 sys/uvm/uvm_fault.c:1131 #4 uvm_fault+0x198 sys/uvm/uvm_fault.c:635 #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 96066 (syz-executor) thread 0xffff80003c401cb0 (453378) shared rwlock amaplk r = 0 (0xfffffd007e35b548) #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 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 (0xfffffd006c6c6118) #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 (0xfffffd006c4cd910) #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_upper+0x338 sys/uvm/uvm_fault.c:1131 #4 uvm_fault+0x198 sys/uvm/uvm_fault.c:635 #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 6321 (syz-executor) thread 0xffff8000fffee7e0 (411201) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a80780) #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 11096 12345K 12420K 166960K 12385 0 pcb 18 12K 12K 166960K 44 0 rtable 218 6K 9K 166960K 368 0 pf 36 17K 21K 166960K 62 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 57 2K 2K 166960K 59 0 sysctl 1 1K 9K 166960K 5 0 counters 72 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1497 0 iov 0 0K 4K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1297 82K 82K 166960K 1417 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 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 196 0 proc 72 115K 196K 166960K 560 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 7 0 in_multi 96 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 386 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 224 150K 160K 166960K 3648 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 104K 166960K 1355 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 13 0K 2K 166960K 30 0 temp 35 9114K 9120K 166960K 4051 0 kqueue 14 22K 24K 166960K 36 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 34 0 31 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 70 0 50 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 20 0 16 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 130 0 122 2 0 2 2 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 3 1 0 1 1 0 8 0 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 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 pfrktable 1344 7 0 7 1 0 1 1 0 8 1 pfanchor 1288 1 0 1 1 0 1 1 0 8 1 pftag 88 3 0 2 1 0 1 1 0 8 0 pfstitem 24 23 0 0 1 0 1 1 0 8 0 pfstkey 128 23 0 0 1 0 1 1 0 8 0 pfstate 448 23 0 0 3 0 3 3 0 8 0 pfrule 1360 23 0 18 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 41 29 0 29 29 0 8 1 art_table 40 453 0 41 5 0 5 5 0 8 0 art_node 32 111 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 72 2 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1686 0 216 93 0 93 93 0 8 0 ffsino 296 1686 0 216 114 0 114 114 0 8 0 nchpl 144 1965 0 259 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1805 0 0 101 0 101 101 0 8 0 namei 1024 6050 0 6050 1 0 1 1 0 8 1 percpumem 16 54 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1 kstatmem 264 31 0 2 2 0 2 2 0 8 0 scxspl 216 6629 0 6629 3 2 1 2 1 8 1 plimitpl 152 36 0 18 1 0 1 1 0 8 0 sigapl 424 514 0 466 7 0 7 7 0 8 1 knotepl 120 293 0 0 9 0 9 9 0 8 0 kqueuepl 224 35 0 25 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 498 0 466 3 0 3 3 0 8 0 filepl 160 1911 0 1690 11 0 11 11 0 8 1 lockfpl 104 48 0 43 1 0 1 1 0 8 0 lockfspl 48 23 0 18 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 164 0 151 1 0 1 1 0 8 0 zombiepl 144 466 0 466 1 0 1 1 0 8 1 processpl 1232 514 0 466 5 0 5 5 0 8 1 procpl 664 616 0 561 6 0 6 6 0 8 1 sockpl 752 236 0 205 4 0 4 4 0 8 0 mcl64k 65536 7 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 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 16 0 0 2 0 2 2 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 132 0 0 9 0 9 9 0 8 0 bufpl 272 2369 0 105 151 0 151 151 0 8 0 anonpl 32 3866 0 0 32 0 32 32 0 246 0 amapchunkpl 152 10000 0 9534 21 0 21 21 0 158 1 amappl16 200 1964 0 1940 5 1 4 5 0 8 2 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 435 0 433 1 0 1 1 0 8 0 amappl13 176 119 0 107 1 0 1 1 0 8 0 amappl12 168 746 0 716 2 0 2 2 0 8 0 amappl11 160 26 0 25 1 0 1 1 0 8 0 amappl10 152 135 0 121 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 100 0 98 1 0 1 1 0 8 0 amappl7 128 160 0 147 1 0 1 1 0 8 0 amappl6 120 173 0 172 1 0 1 1 0 8 0 amappl5 112 99 0 88 1 0 1 1 0 8 0 amappl4 104 297 0 277 1 0 1 1 0 8 0 amappl3 96 1826 0 1716 4 0 4 4 0 8 0 amappl2 88 537 0 478 2 0 2 2 0 8 0 amappl1 80 10572 0 9963 15 0 15 15 0 8 2 amappl 88 2915 0 2760 4 0 4 4 0 92 0 uvmvnodes 80 104 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 128 253 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 24 499 0 467 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 499 0 467 1 0 1 1 0 8 0 vmmpekpl 168 6061 0 6027 2 0 2 2 0 8 0 vmmpepl 168 41149 0 39216 87 0 87 87 0 357 1 vmsppl 488 498 0 467 5 0 5 5 0 8 1 rwobjpl 80 15119 0 14103 24 0 24 24 0 8 2 pdppl 4096 1005 0 934 97 26 71 85 0 8 0 pvpl 32 10298 0 0 84 0 84 84 0 265 0 pmappl 256 498 0 467 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 417 0 29 12 0 12 12 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: 0x798b10061560, 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(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000367a0630,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000367a0630) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff8000367a07e0, 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(800,65) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(65) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(65) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345c86a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351f6d7) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff8000367a0630,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff8000367a0630) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000fffee7e0,fffffd006bfe7c18,ffff8000367a0810) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff8000fffee7e0,ffff8000367a0960,ffff8000367a08b0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff8000367a0960) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000367a0960) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x46bb97627f0, count: -18