*cpu0: uvm_fault(0xfffffd806c13f020, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+199 end of kernel end trace frame: 0x7c4283358060, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 18446603337165100704 rbx 0 rdx 0 rcx 18446603337080982808 rax 42 r8 18446603337165100496 r9 1 r10 12652156760563935296 r11 11349405412138245027 r12 0 r13 18446744071597485992 Xdoreti+24 r14 0 r15 0 rip 18446744071588656327 proc_trampoline+199 cs 8 rflags 582 rsp 18446603337165100576 ss 0 proc_trampoline+199: movl $0,%gs:1672 ddb{1}> show proc PROC (syz-executor) tid=215748 pid=6667 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000333f5248,0xffff80003c427260 process=0xffff800038009d08 user=0xffff800038428000, vmspace=0xfffffd806c13f208 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 6667 215748 97514 0 7 0 syz-executor 6667 221288 97514 0 3 0x4000000 smrbar syz-executor 61864 481818 63262 0 2 0xc80 syz-executor 61864 518525 63262 0 3 0x4000080 netacc syz-executor 61864 190488 63262 0 3 0x4000080 fsleep syz-executor 61864 169883 63262 0 3 0x4000080 fsleep syz-executor 62895 15801 86852 0 2 0xc80 syz-executor 62895 344164 86852 0 3 0x4000080 ttyout syz-executor 62895 40526 86852 0 3 0x4000080 fsleep syz-executor 79793 204516 2713 0 2 0xc80 syz-executor 79793 110133 2713 0 3 0x4000080 sbwait syz-executor 79793 240624 2713 0 3 0x4000080 fsleep syz-executor 42279 249801 48491 0 3 0x3000 suspend syz-executor 42279 388558 48491 0 2 0x4081000 syz-executor 42279 144546 48491 0 3 0x4081000 inode syz-executor 97514 453104 18728 0 2 0xc82 syz-executor 13956 361135 18728 0 2 0x2 syz-executor 86852 183744 18728 0 2 0xc82 syz-executor 95023 177282 18728 0 2 0xc82 syz-executor 97285 328983 18728 0 2 0xc82 syz-executor 48491 400724 18728 0 2 0xc82 syz-executor 63262 177918 18728 0 2 0xc82 syz-executor 2713 274523 18728 0 2 0xc82 syz-executor 18728 389034 15605 0 3 0x82 kqread syz-executor 15605 178302 95288 0 3 0x10008a sigsusp ksh 95288 336628 72812 0 3 0x98 kqread sshd-session 72812 165927 97576 0 3 0x92 kqread sshd-session 80227 366995 1 0 3 0x100083 ttyin getty 97576 276500 1 0 3 0x88 kqread sshd 90938 72424 29631 74 3 0x1100092 bpf pflogd 29631 141604 1 0 3 0x80 sbwait pflogd 92579 290346 86615 73 3 0x1100090 kqread syslogd 86615 84317 1 0 3 0x100082 sbwait syslogd 59923 410798 1 0 3 0x100080 kqread resolvd 48004 493901 40605 77 3 0x100092 kqread dhcpleased 69092 317332 40605 77 3 0x100092 kqread dhcpleased 40605 71779 1 0 3 0x80 kqread dhcpleased 30636 424907 0 0 3 0x14200 bored smr 68882 18492 0 0 3 0x14200 pgzero zerothread 68112 84714 0 0 3 0x14200 aiodoned aiodoned 14020 78476 0 0 3 0x14200 syncer update 13957 289686 0 0 3 0x14200 cleaner cleaner 30008 344087 0 0 3 0x14200 reaper reaper 75347 102362 0 0 3 0x14200 pgdaemon pagedaemon 51852 109247 0 0 3 0x14200 bored viomb 34101 42669 0 0 3 0x40014200 acpi0 acpi0 63192 273232 0 0 3 0x40014200 idle1 41080 176734 0 0 3 0x14200 bored softnet1 74308 250324 0 0 3 0x14200 bored softnet0 24080 321774 0 0 3 0x14200 bored systqmp 20299 278379 0 0 3 0x14200 bored systq 25979 259118 0 0 3 0x14200 tmoslp softclockmp 81994 383608 0 0 3 0x40014200 tmoslp softclock 74274 98256 0 0 3 0x40014200 idle0 1 337132 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &sched_lock r = 0 (0xffffffff8399fd20) #0 witness_lock+1521 #1 mtx_enter+1204 #2 sleep_finish+470 #3 msleep_nsec+306 #4 reaper+347 #5 proc_trampoline+16 Process 42279 (syz-executor) thread 0xffff8000fffee548 (388558) exclusive rrwlock inode r = 0 (0xfffffd806e365490) #0 witness_lock+1521 #1 rw_do_enter_write+1049 #2 rrw_enter+198 #3 VOP_LOCK+189 #4 vn_lock+164 #5 vn_write+399 #6 dofilewritev+578 #7 sys_write+162 #8 syscall+3028 #9 Xsyscall+296 Process 42279 (syz-executor) thread 0xffff8000fffef770 (144546) exclusive rrwlock inode r = 0 (0xfffffd806e365930) #0 witness_lock+1521 #1 rw_do_enter_write+1049 #2 rrw_enter+198 #3 VOP_LOCK+189 #4 vn_lock+164 #5 vfs_lookup+284 #6 namei+1994 #7 vn_open+346 #8 sys_acct+185 #9 syscall+2839 #10 Xsyscall+296 Process 13956 (syz-executor) thread 0xffff8000333f54e0 (361135) exclusive rrwlock inode r = 0 (0xfffffd805e68c900) #0 witness_lock+1521 #1 rw_do_enter_write+1049 #2 rrw_enter+198 #3 VOP_LOCK+189 #4 ufs_ihashins+79 #5 ffs_vget+391 #6 ffs_inode_alloc+633 #7 ufs_mkdir+252 #8 VOP_MKDIR+257 #9 domkdirat+377 #10 syscall+2839 #11 Xsyscall+296 exclusive rrwlock inode r = 0 (0xfffffd806e1c9b18) #0 witness_lock+1521 #1 rw_do_enter_write+1049 #2 rrw_enter+198 #3 VOP_LOCK+189 #4 vn_lock+164 #5 vfs_lookup+284 #6 namei+1994 #7 domkdirat+139 #8 syscall+2839 #9 Xsyscall+296 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 11071K 11279K 166960K 12015 0 pcb 17 16K 17K 166960K 339 0 rtable 236 9K 9K 166960K 593 0 pf 38 18K 18K 166960K 127 0 ifaddr 45 8K 8K 166960K 110 0 ifgroup 61 2K 2K 166960K 162 0 sysctl 4 1K 9K 166960K 43 0 counters 72 37K 37K 166960K 176 0 ioctlops 0 0K 4K 166960K 1706 0 iov 0 0K 24K 166960K 77 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1431 90K 90K 166960K 2077 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 72 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1078 0 sigio 0 0K 0K 166960K 19 0 proc 73 115K 163K 166960K 757 0 subproc 72 4K 4K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 97 0 in_multi 99 7K 7K 166960K 186 0 ether_multi 1 0K 0K 166960K 8 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 635 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 165K 175K 166960K 11142 0 UVM aobj 25 6K 6K 166960K 27 0 pinsyscall 42 84K 104K 166960K 2324 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 14 0K 2K 166960K 76 0 temp 75 8660K 8732K 166960K 46323 0 kqueue 13 20K 28K 166960K 199 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 120 116 0 113 1 0 1 1 0 8 0 rtentry 176 183 0 81 6 0 6 6 0 8 0 unpcb 144 658 0 641 11 7 4 6 0 8 3 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 310 0 302 8 6 2 7 0 8 1 arp 136 29 0 11 1 0 1 1 0 8 0 inpcb 328 1298 0 1283 12 5 7 12 0 8 5 nd6 152 41 0 16 2 0 2 2 0 8 0 pkpcb 40 5 0 5 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1192 41 0 40 1 0 1 1 0 8 0 pppxif 1504 6 0 6 2 1 1 1 0 8 1 pffrag 232 11 0 5 1 0 1 1 0 482 0 pffrnode 88 11 0 5 1 0 1 1 0 8 0 pffrent 40 18 0 12 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 63 0 23 1 0 1 1 0 8 0 pfstkey 128 63 0 23 2 0 2 2 0 8 0 pfstate 384 63 0 23 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 799 0 350 32 3 29 29 0 8 0 art_table 40 800 0 350 5 0 5 5 0 8 0 art_node 32 183 0 92 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 64 0 54 1 0 1 1 0 8 0 shmpl 112 22 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3324 0 1805 96 0 96 96 0 8 0 ffsino 296 3324 0 1805 118 0 118 118 0 8 0 nchpl 144 4733 0 3019 65 0 65 65 0 8 0 rtmask 32 6 0 6 2 1 1 1 0 8 1 vnodes 216 3725 0 0 207 0 207 207 0 8 0 namei 1024 16078 0 16076 2 0 2 2 0 8 1 percpumem 16 103 0 52 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 840 2 0 0 1 0 1 1 0 8 0 kstatmem 264 104 0 72 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 9 0 9 2 1 1 1 0 8 1 scxspl 216 28656 0 28656 10 8 2 8 1 8 2 plimitpl 152 265 0 246 1 0 1 1 0 8 0 sigapl 424 1369 0 1322 7 1 6 7 0 8 0 knotepl 120 777 0 0 24 0 24 24 0 8 0 kqueuepl 224 377 0 367 7 5 2 5 0 8 0 pipepl 344 203 0 175 3 0 3 3 0 8 0 fdescpl 528 1348 0 1317 3 0 3 3 0 8 0 filepl 160 7966 0 7736 19 4 15 16 0 8 4 lockfpl 104 354 0 352 1 0 1 1 0 8 0 lockfspl 48 118 0 116 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 58 0 41 1 0 1 1 0 8 0 ucredpl 104 1193 0 1180 1 0 1 1 0 8 0 zombiepl 144 1325 0 1322 1 0 1 1 0 8 0 processpl 1232 1369 0 1322 6 1 5 5 0 8 0 procpl 664 2876 0 2819 6 0 6 6 0 8 0 sosppl 176 9 0 9 1 0 1 1 0 8 1 sockpl 752 2097 0 2062 29 17 12 17 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1157 0 0 73 0 73 73 0 8 0 bufpl 280 11389 0 5252 439 0 439 439 0 8 0 anonpl 32 9812 0 0 80 0 80 80 0 246 0 amapchunkpl 152 37511 0 36858 32 3 29 30 0 158 3 amappl16 200 4586 0 4358 27 12 15 22 0 8 2 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 3 0 3 2 2 0 1 0 8 0 amappl13 176 510 0 509 1 0 1 1 0 8 0 amappl12 168 1743 0 1701 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 99 0 98 1 0 1 1 0 8 0 amappl6 120 338 0 323 1 0 1 1 0 8 0 amappl5 112 81 0 70 1 0 1 1 0 8 0 amappl4 104 446 0 416 1 0 1 1 0 8 0 amappl3 96 6500 0 6403 4 1 3 3 0 8 0 amappl2 88 1441 0 1365 2 0 2 2 0 8 0 amappl1 80 13621 0 13024 16 2 14 14 0 8 0 amappl 88 10176 0 10000 5 0 5 5 0 92 0 uvmvnodes 80 3725 0 0 77 0 77 77 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 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 2 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 26 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1348 0 1317 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1348 0 1317 1 0 1 1 0 8 0 vmmpekpl 168 11563 0 11509 3 0 3 3 0 8 0 vmmpepl 168 91434 0 89281 112 6 106 106 0 357 10 vmsppl 488 1347 0 1317 5 0 5 5 0 8 0 rwobjpl 80 29943 0 25047 100 0 100 100 0 8 0 pdppl 4096 2708 0 2636 106 32 74 84 0 8 2 pvpl 32 16958 0 0 138 1 137 138 0 265 0 pmappl 256 1349 0 1317 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 353 0 45 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+39: addq $8,%rsp x86_ipi_db(ffffffff837e0ff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+55 comcnputc(800,a) at comcnputc+592 cnputc(a) at cnputc+103 db_putchar(a) at db_putchar+1176 kprintf() at kprintf+547 db_printf(ffffffff83336eb6) at db_printf+155 fault(ffffffff833f6ab3) at fault+167 kpageflttrap(ffff800038006ea0,0) at kpageflttrap+893 kerntrap(ffff800038006ea0) at kerntrap+412 alltraps_kern_meltdown() at alltraps_kern_meltdown+123 dt_ioctl_record_stop(ffff800001461000) at dt_ioctl_record_stop+264 end trace frame: 0xffff800038006fd0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff837e0ff0) at x86_ipi_db+39 x86_ipi_handler() at x86_ipi_handler+217 Xresume_lapic_ipi() at Xresume_lapic_ipi+39 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+55 comcnputc(800,a) at comcnputc+592 cnputc(a) at cnputc+103 db_putchar(a) at db_putchar+1176 kprintf() at kprintf+547 db_printf(ffffffff83336eb6) at db_printf+155 fault(ffffffff833f6ab3) at fault+167 kpageflttrap(ffff800038006ea0,0) at kpageflttrap+893 kerntrap(ffff800038006ea0) at kerntrap+412 alltraps_kern_meltdown() at alltraps_kern_meltdown+123 dt_ioctl_record_stop(ffff800001461000) at dt_ioctl_record_stop+264 dtclose(11e5f,81,2000,ffff8000333f42b8) at dtclose+265 spec_close(ffff800038007050) at spec_close+1126 VOP_CLOSE(fffffd805fa74568,81,fffffd80097fb478,ffff8000333f42b8) at VOP_CLOSE+306 vn_closefile(fffffd806bf45a60,ffff8000333f42b8) at vn_closefile+299 fdrop(fffffd806bf45a60,ffff8000333f42b8) at fdrop+289 closef(fffffd806bf45a60,ffff8000333f42b8) at closef+402 fdfree(ffff8000333f42b8) at fdfree+278 exit1(ffff8000333f42b8,b,0,1) at exit1+1398 sys_exit(ffff8000333f42b8,ffff8000380073c0,ffff800038007310) at sys_exit+26 syscall(ffff8000380073c0) at syscall+2839 Xsyscall() at Xsyscall+296 end of kernel end trace frame: 0x7dd191c0c510, count: -25 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+199: movl $0,%gs:1672 proc_trampoline() at proc_trampoline+199 end of kernel end trace frame: 0x7c4283358060, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+199 end of kernel end trace frame: 0x7c4283358060, count: -1