*cpu1: uvm_fault(0xffffef806c6d39a0, 0x98, 0, 1) -> e ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x709c550ddfa0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003c3ef030 rbx 0 rdx 0 rcx 0xffff80003c3b9248 rax 0x2a r8 0xffff80003c3eef60 r9 0 r10 0x342cbe7e380d6df r11 0x1302ef3eb5c8a8f6 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8322f4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c3eefb0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=407787 pid=58167 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=0xffff80003c3b87e8,0xffffffff83a14708 process=0xffff80003c3bf510 user=0xffff80003c3ea000, vmspace=0xffffef806c6d3200 estcpu=3, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *58167 407787 9822 0 7 0 syz-executor 46028 486041 66156 0 2 0 syz-executor 46028 294667 66156 0 7 0x4000000 syz-executor 46028 506837 66156 0 3 0x4000080 fsleep syz-executor 87065 466508 97636 0 2 0 syz-executor 81349 163657 3235 -1 2 0x10 syz-executor 81349 162530 3235 -1 3 0x4000090 fsleep syz-executor 81349 451607 3235 -1 3 0x4000090 fsleep syz-executor 81349 137113 3235 -1 3 0x4000090 fsleep syz-executor 97704 4392 32250 0 2 0x40 syz-executor 50738 40042 35763 0 2 0x40 syz-executor 34201 380744 46141 0 2 0 syz-executor 34201 144710 46141 0 2 0x4000000 syz-executor 34201 225064 46141 0 3 0x4000080 fsleep syz-executor 53948 323275 80718 0 3 0x80 nanoslp syz-executor 53948 507894 80718 0 3 0x4000080 fsleep syz-executor 53948 379195 80718 0 3 0x4000080 fsleep syz-executor 9822 388225 65432 0 3 0x82 nanoslp syz-executor 35763 317189 65432 0 3 0x82 ppwait syz-executor 66156 98817 65432 0 3 0x82 nanoslp syz-executor 32250 74391 65432 0 3 0x82 ppwait syz-executor 80718 158198 65432 0 3 0x82 nanoslp syz-executor 3235 308379 65432 0 3 0x82 nanoslp syz-executor 97636 325636 65432 0 3 0x82 nanoslp syz-executor 46141 65728 65432 0 3 0x82 nanoslp syz-executor 65432 280414 60936 0 3 0x82 kqread syz-executor 60936 45112 82157 0 3 0x10008a sigsusp ksh 82157 397549 33744 0 3 0x98 kqread sshd-session 33744 334542 32631 0 3 0x92 kqread sshd-session 19353 358789 1 0 3 0x100083 ttyin getty 32631 120732 1 0 3 0x88 kqread sshd 43711 198044 70541 74 3 0x1100092 bpf pflogd 70541 117635 1 0 3 0x80 sbwait pflogd 22255 382061 17817 73 3 0x1100090 kqread syslogd 17817 66682 1 0 3 0x100082 sbwait syslogd 83486 230933 1 0 3 0x100080 kqread resolvd 69608 9699 24284 77 3 0x100092 kqread dhcpleased 27199 113933 24284 77 3 0x100092 kqread dhcpleased 24284 622 1 0 3 0x80 kqread dhcpleased 70830 128434 0 0 3 0x14200 bored smr 52072 317568 0 0 2 0x14200 zerothread 56764 74112 0 0 3 0x14200 aiodoned aiodoned 88100 69149 0 0 3 0x14200 syncer update 51982 491843 0 0 3 0x14200 cleaner cleaner 51858 323376 0 0 3 0x14200 reaper reaper 34847 186555 0 0 3 0x14200 pgdaemon pagedaemon 69674 379626 0 0 3 0x14200 bored viomb 1409 404666 0 0 3 0x40014200 acpi0 acpi0 77684 137121 0 0 3 0x40014200 idle1 58404 377276 0 0 3 0x14200 bored softnet1 25959 438056 0 0 3 0x14200 bored softnet0 50819 194658 0 0 3 0x14200 smrbar systqmp 35495 195877 0 0 3 0x14200 bored systq 90679 128609 0 0 3 0x14200 tmoslp softclockmp 12667 505785 0 0 3 0x40014200 tmoslp softclock 68986 392904 0 0 3 0x40014200 idle0 1 192134 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 (0xffffef806c538910) #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 58167 (syz-executor) thread 0xffff80003c3b9248 (407787) exclusive rwlock amaplk r = 0 (0xffffef806cd06838) #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 (0xffffef806c6d3300) #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 (0xffffef806c538910) #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 46028 (syz-executor) thread 0xffff80003c3b8a80 (294667) 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 Process 50819 (systqmp) thread 0xffff8000ffffe530 (194658) shared rwlock systqmp r = 0 (0xffffffff839a4728) #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 11057 12157K 12215K 166960K 12162 0 pcb 17 12K 12K 166960K 21 0 rtable 209 5K 6K 166960K 323 0 pf 35 17K 18K 166960K 46 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 1292 81K 81K 166960K 1364 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 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 140 0 proc 70 115K 196K 166960K 541 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 3 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 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 214 158K 174K 166960K 3276 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 105K 166960K 1318 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 1K 166960K 24 0 temp 34 9114K 9120K 166960K 3919 0 kqueue 13 20K 20K 166960K 25 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 35 0 32 1 0 1 1 0 8 0 rtentry 176 97 0 1 5 0 5 5 0 8 0 unpcb 144 41 0 23 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 10 0 5 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 73 0 65 1 0 1 1 0 8 0 nd6 152 18 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfstscr 40 2 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 20 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 0 1 0 1 1 0 8 0 pfstate 448 19 0 0 3 0 3 3 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 256 372 0 0 24 0 24 24 0 8 0 art_table 40 373 0 0 4 0 4 4 0 8 0 art_node 32 97 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1572 0 105 92 0 92 92 0 8 0 ffsino 296 1572 0 105 113 0 113 113 0 8 0 nchpl 144 1782 0 82 63 0 63 63 0 8 0 vnodes 216 1665 0 0 93 0 93 93 0 8 0 namei 1024 5475 0 5475 2 0 2 2 0 8 2 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 6177 0 6177 4 2 2 3 1 8 2 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 469 0 421 7 0 7 7 0 8 1 knotepl 120 52 0 0 2 0 2 2 0 8 0 kqueuepl 224 24 0 13 1 0 1 1 0 8 0 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 453 0 421 3 0 3 3 0 8 0 filepl 160 1613 0 1396 10 0 10 10 0 8 0 lockfpl 104 9 0 7 1 0 1 1 0 8 0 lockfspl 48 5 0 3 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 89 0 75 1 0 1 1 0 8 0 zombiepl 144 421 0 421 1 0 1 1 0 8 1 processpl 1232 469 0 421 5 0 5 5 0 8 0 procpl 664 490 0 433 5 0 5 5 0 8 0 sockpl 752 149 0 120 4 0 4 4 0 8 1 mcl64k 65536 2 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 256 121 0 0 8 0 8 8 0 8 0 bufpl 272 2288 0 105 146 0 146 146 0 8 0 anonpl 32 3839 0 0 31 0 31 31 0 246 0 amapchunkpl 152 8914 0 8513 24 0 24 24 0 158 6 amappl16 200 1891 0 1878 5 0 5 5 0 8 4 amappl15 192 2 0 2 1 0 1 1 0 8 1 amappl14 184 436 0 435 1 0 1 1 0 8 0 amappl13 176 128 0 116 1 0 1 1 0 8 0 amappl12 168 708 0 680 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 81 0 67 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 0 1 1 0 8 1 amappl8 136 105 0 103 1 0 1 1 0 8 0 amappl7 128 149 0 136 1 0 1 1 0 8 0 amappl6 120 152 0 150 1 0 1 1 0 8 0 amappl5 112 98 0 87 1 0 1 1 0 8 0 amappl4 104 295 0 276 1 0 1 1 0 8 0 amappl3 96 1526 0 1435 3 0 3 3 0 8 0 amappl2 88 568 0 507 2 0 2 2 0 8 0 amappl1 80 10562 0 9964 14 0 14 14 0 8 0 amappl 88 2534 0 2392 4 0 4 4 0 92 0 uvmvnodes 80 102 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 453 0 421 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 453 0 421 1 0 1 1 0 8 0 vmmpekpl 168 5798 0 5769 2 0 2 2 0 8 0 vmmpepl 168 38807 0 36941 85 0 85 85 0 357 0 vmsppl 488 452 0 421 5 0 5 5 0 8 0 rwobjpl 80 14827 0 13842 23 0 23 23 0 8 0 pdppl 4096 913 0 842 103 18 85 87 0 8 14 pvpl 32 9006 0 0 73 0 73 73 0 265 0 pmappl 256 452 0 421 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 411 0 21 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: 0x709c550ddfa0, 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(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 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(ffff80002ef8b9a0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002ef8b9a0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3b8a80,ffffef806607e0e0,ffff80002ef8bb80) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 end trace frame: 0xffff80002ef8bbf0, 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(800,20) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,20) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(20) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x126 db_force_whitespace sys/ddb/db_output.c:102 [inline] db_putchar(2d) at db_putchar+0x126 sys/ddb/db_output.c:153 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(ffff80002ef8b9a0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002ef8b9a0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3b8a80,ffffef806607e0e0,ffff80002ef8bb80) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff80003c3b8a80,ffff80002ef8bcd0,ffff80002ef8bc20) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80002ef8bcd0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002ef8bcd0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xffe17731b80, count: -17