*cpu0: uvm_fault(0xfffff4800f10b208, 0x98, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x776f6d92bf60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800036f9af20 rbx 0 rdx 0 rcx 0xffff800038fa34e8 rax 0x2a r8 0xffff800036f9ae50 r9 0 r10 0x3f5ff817bdb7c1f6 r11 0xd30ff8547cbebd44 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff818484c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800036f9aea0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=504761 pid=69020 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=0xffff800038fa3780,0xffffffff839f3858 process=0xffff8000fffe9d00 user=0xffff800036f95000, vmspace=0xfffff4800f10bb90 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *69020 504761 79087 0 7 0 syz-executor 94250 509447 91184 0 2 0 syz-executor 94250 513149 91184 0 7 0x4000000 syz-executor 67343 209141 25362 0 2 0 syz-executor 67343 115252 25362 0 3 0x4000080 bell syz-executor 65319 182863 67339 0 2 0 syz-executor 65319 503564 67339 0 3 0x4000080 fsleep syz-executor 96679 474215 43439 0 2 0 syz-executor 25941 387921 61131 0 2 0 syz-executor 25941 438323 61131 0 3 0x4000080 fsleep syz-executor 72316 501175 30678 0 2 0 syz-executor 72316 350901 30678 0 3 0x4000080 fsleep syz-executor 6367 278366 78532 0 2 0 syz-executor 6367 516047 78532 0 3 0x4000080 fsleep syz-executor 78532 435963 48774 0 2 0xc82 syz-executor 67339 306965 48774 0 3 0x82 nanoslp syz-executor 61131 286118 48774 0 2 0xc82 syz-executor 30678 19302 48774 0 3 0x82 nanoslp syz-executor 91184 458910 48774 0 2 0xc82 syz-executor 79087 141754 48774 0 3 0x82 nanoslp syz-executor 25362 330543 48774 0 3 0x82 nanoslp syz-executor 43439 390235 48774 0 2 0xc82 syz-executor 48774 493090 5914 0 3 0x82 kqread syz-executor 5914 116225 93774 0 3 0x10008a sigsusp ksh 93774 490211 4373 0 3 0x98 kqread sshd-session 4373 23708 1845 0 3 0x92 kqread sshd-session 95713 413781 1 0 3 0x100083 ttyin getty 1845 47738 1 0 3 0x88 kqread sshd 90053 109199 5831 74 3 0x1100092 bpf pflogd 5831 450065 1 0 3 0x80 sbwait pflogd 2246 339695 21627 73 3 0x1100090 kqread syslogd 21627 228123 1 0 3 0x100082 sbwait syslogd 94700 411586 1 0 3 0x100080 kqread resolvd 15899 231804 1620 77 3 0x100092 kqread dhcpleased 25102 297187 1620 77 3 0x100092 kqread dhcpleased 1620 71841 1 0 3 0x80 kqread dhcpleased 79265 401524 0 0 3 0x14200 bored smr 95431 287372 0 0 2 0x14200 zerothread 13906 483601 0 0 3 0x14200 aiodoned aiodoned 35881 76804 0 0 3 0x14200 syncer update 84643 43539 0 0 3 0x14200 cleaner cleaner 49306 172746 0 0 3 0x14200 reaper reaper 66036 93641 0 0 3 0x14200 pgdaemon pagedaemon 72977 5047 0 0 3 0x14200 bored viomb 12807 275415 0 0 3 0x40014200 acpi0 acpi0 2936 62770 0 0 3 0x40014200 idle1 82841 291884 0 0 3 0x14200 bored softnet1 62094 409185 0 0 3 0x14200 bored softnet0 36882 11517 0 0 3 0x14200 bored systqmp 53152 32022 0 0 3 0x14200 bored systq 90802 469007 0 0 3 0x14200 tmoslp softclockmp 84698 2516 0 0 3 0x40014200 tmoslp softclock 37825 163470 0 0 3 0x40014200 idle0 1 23833 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffff4806c4b4110) #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_lookup+0x30d sys/uvm/uvm_fault.c:-1 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:632 #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 69020 (syz-executor) thread 0xffff800038fa34e8 (504761) exclusive rwlock amaplk r = 0 (0xfffff4807e3931d8) #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 (0xfffff4800f10bc90) #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 (0xfffff4806c4b4110) #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_lookup+0x30d sys/uvm/uvm_fault.c:-1 #4 uvm_fault+0x159 sys/uvm/uvm_fault.c:632 #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 94250 (syz-executor) thread 0xffff800038fa3780 (513149) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a57a40) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12086K 12174K 166960K 12166 0 pcb 18 12K 12K 166960K 31 0 rtable 252 7K 7K 166960K 386 0 pf 34 17K 18K 166960K 45 0 ifaddr 44 7K 7K 166960K 46 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 1490 0 iov 0 0K 4K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1290 81K 81K 166960K 1389 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 7 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 187 0 proc 71 115K 164K 166960K 556 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 2 0K 0K 166960K 14 0 in_multi 99 7K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 397 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 221 174K 183K 166960K 3592 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 104K 166960K 1386 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 28 0 temp 36 9114K 9178K 166960K 6762 0 kqueue 14 22K 24K 166960K 32 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 41 0 38 1 0 1 1 0 8 0 rtentry 176 116 0 2 6 0 6 6 0 8 0 unpcb 144 67 0 48 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 19 0 15 1 0 1 1 0 8 0 arp 136 19 0 0 1 0 1 1 0 8 0 inpcb 328 109 0 100 2 0 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 0 2 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 21 0 0 1 0 1 1 0 8 0 pfstkey 128 21 0 0 1 0 1 1 0 8 0 pfstate 448 21 0 0 3 0 3 3 0 8 0 pfrule 1360 21 0 15 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 459 0 0 29 0 29 29 0 8 0 art_table 40 461 0 0 5 0 5 5 0 8 0 art_node 32 116 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 5 0 2 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1662 0 192 93 0 93 93 0 8 0 ffsino 296 1662 0 192 114 0 114 114 0 8 0 nchpl 144 1915 0 215 64 0 64 64 0 8 0 vnodes 216 1759 0 0 98 0 98 98 0 8 0 namei 1024 6053 0 6053 1 0 1 1 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 6603 0 6603 4 3 1 3 1 8 1 plimitpl 152 36 0 19 1 0 1 1 0 8 0 sigapl 424 517 0 469 7 0 7 7 0 8 1 knotepl 120 194 0 0 6 0 6 6 0 8 0 kqueuepl 224 34 0 24 1 0 1 1 0 8 0 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 501 0 469 3 0 3 3 0 8 0 filepl 160 1833 0 1618 10 0 10 10 0 8 0 lockfpl 104 29 0 27 1 0 1 1 0 8 0 lockfspl 48 13 0 11 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 16 1 0 1 1 0 8 0 ucredpl 104 144 0 131 1 0 1 1 0 8 0 zombiepl 144 469 0 469 1 0 1 1 0 8 1 processpl 1232 517 0 469 5 0 5 5 0 8 0 procpl 664 612 0 558 6 0 6 6 0 8 0 sockpl 752 217 0 186 4 0 4 4 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 168 0 0 11 0 11 11 0 8 0 bufpl 272 2392 0 107 153 0 153 153 0 8 0 anonpl 32 3624 0 0 30 0 30 30 0 246 0 amapchunkpl 152 9732 0 9292 22 1 21 21 0 158 1 amappl16 200 1318 0 1298 4 2 2 4 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 449 0 448 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 819 0 789 2 0 2 2 0 8 0 amappl11 160 14 0 14 2 2 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 276 0 275 1 0 1 1 0 8 0 amappl8 136 154 0 151 1 0 1 1 0 8 0 amappl7 128 148 0 135 1 0 1 1 0 8 0 amappl6 120 157 0 155 1 0 1 1 0 8 0 amappl5 112 102 0 92 1 0 1 1 0 8 0 amappl4 104 300 0 279 1 0 1 1 0 8 0 amappl3 96 1843 0 1739 4 0 4 4 0 8 0 amappl2 88 580 0 520 2 0 2 2 0 8 0 amappl1 80 10824 0 10205 15 0 15 15 0 8 1 amappl 88 2837 0 2689 4 0 4 4 0 92 0 uvmvnodes 80 100 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 501 0 469 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 501 0 469 1 0 1 1 0 8 0 vmmpekpl 168 6206 0 6174 2 0 2 2 0 8 0 vmmpepl 168 41037 0 39119 87 0 87 87 0 357 2 vmsppl 488 500 0 469 5 0 5 5 0 8 1 rwobjpl 80 14839 0 13828 24 0 24 24 0 8 1 pdppl 4096 1009 0 938 107 36 71 85 0 8 0 pvpl 32 10256 0 0 86 3 83 84 0 265 0 pmappl 256 500 0 469 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 433 0 38 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8392aff0) 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(3f8,0,30) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,30) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,30) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345e008) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83520e77) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800039fabfb0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800039fabfb0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038fa3780,fffff4806c0b68a0,ffff800039fac190) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 end trace frame: 0xffff800039fac200, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8392aff0) 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(3f8,0,30) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,30) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,30) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345e008) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83520e77) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff800039fabfb0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff800039fabfb0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038fa3780,fffff4806c0b68a0,ffff800039fac190) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff800038fa3780,ffff800039fac2e0,ffff800039fac230) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff800039fac2e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039fac2e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4e0b22a800, count: -17 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x776f6d92bf60, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x776f6d92bf60, count: -1