uvm_fault(0xfffffd807efffb80, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi TID PID UID PRFLAGS PFLAGS CPU COMMAND *268893 74507 32767 0x10 0x4000000 1K syz-executor.1 88360 74507 32767 0x10 0x4000000 0 syz-executor.1 uvm_fault_lower(ffff8000246b6a00,ffff8000246b6a38,ffff8000246b6980,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffb80,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff8000246b6b90,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000246b6b90) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021280000,ffff8000246b6e08,ffff8000246b6e60) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246b6ed0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246b6ed0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe2254e34f0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd807efffb80, 0x0, 0, 1) -> e ddb{1}> trace uvm_fault_lower(ffff8000246b6a00,ffff8000246b6a38,ffff8000246b6980,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffb80,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff8000246b6b90,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000246b6b90) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021280000,ffff8000246b6e08,ffff8000246b6e60) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246b6ed0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246b6ed0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe2254e34f0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000246b68f0 rbx 0 rdx 0 rcx 0 rax 0xffff800021280000 r8 0xffffffff81a8edde witness_assert+0x1fe r9 0x5 r10 0x87e346421d6f32f0 r11 0xaa643f9a25232366 r12 0xffff8000246b6a00 r13 0xfffffd806596e2c0 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000246b6860 ss 0x10 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{1}> show proc PROC (syz-executor.1) pid=268893 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021281260,0xffff8000212817b0 process=0xffff8000ffff8c80 user=0xffff8000246b1000, vmspace=0xfffffd807efffb80 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74507 497600 36879 32767 2 0x10 syz-executor.1 *74507 268893 36879 32767 7 0x4000010 syz-executor.1 74507 120366 36879 32767 3 0x4000010 biowait syz-executor.1 74507 4135 36879 32767 2 0x4000010 syz-executor.1 74507 88360 36879 32767 7 0x4000010 syz-executor.1 57922 87176 92041 32767 3 0x90 nanoslp syz-executor.0 92041 238331 80043 0 3 0x82 wait syz-executor.0 36879 438445 12 32767 3 0x90 nanoslp syz-executor.1 12 14051 80043 0 3 0x82 wait syz-executor.1 17758 127222 0 0 3 0x14200 bored sosplice 80043 191582 55723 0 3 0x82 thrsleep syz-fuzzer 80043 150929 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 134341 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 13271 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 504636 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 273231 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 246710 55723 0 3 0x4000082 thrsleep syz-fuzzer 80043 344733 55723 0 3 0x4000082 kqread syz-fuzzer 55723 524261 98999 0 3 0x10008a sigsusp ksh 98999 344080 51204 0 3 0x9a kqread sshd 64998 248824 1 0 3 0x100083 ttyin getty 51204 204599 1 0 3 0x88 kqread sshd 99737 102126 5818 73 3 0x100090 kqread syslogd 5818 302072 1 0 3 0x100082 netio syslogd 82715 104954 1 0 3 0x100080 kqread resolvd 28466 91704 96414 77 3 0x100092 kqread dhcpleased 78539 355026 96414 77 3 0x100092 kqread dhcpleased 96414 400317 1 0 3 0x80 kqread dhcpleased 918 296776 0 0 3 0x14200 bored smr 85293 219169 0 0 2 0x14200 zerothread 59373 455827 0 0 3 0x14200 aiodoned aiodoned 97544 119103 0 0 3 0x14200 syncer update 21934 160669 0 0 3 0x14200 cleaner cleaner 72554 409582 0 0 3 0x14200 reaper reaper 31917 120217 0 0 3 0x14200 pgdaemon pagedaemon 31437 128786 0 0 3 0x14200 bored viomb 12522 445794 0 0 3 0x40014200 acpi0 acpi0 79230 25570 0 0 3 0x40014200 idle1 48231 389043 0 0 3 0x14200 bored softnet 73616 389835 0 0 3 0x14200 bored systqmp 41407 451907 0 0 3 0x14200 bored systq 16172 266566 0 0 3 0x40014200 bored softclock 54177 44010 0 0 3 0x40014200 idle0 1 447687 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74507 (syz-executor.1) thread 0xffff800021280000 (268893) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b70b8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801 #6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288 #7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #8 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #10 alltraps_kern_meltdown+0x7b #11 copyin+0x53 #12 sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 Process 74507 (syz-executor.1) thread 0xffff8000212817a0 (120366) exclusive rrwlock inode r = 0 (0xfffffd8069352e78) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vn_write+0x11d sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x1a3 sys/kern/sys_generic.c:380 #7 sys_writev+0xa7 sys/kern/sys_generic.c:327 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 74507 (syz-executor.1) thread 0xffff8000212807e0 (88360) shared rwlock vmmaplk r = 0 (0xfffffd807efffb98) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_map_inentry_fix+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5480 [inline] #1 uvm_map_inentry_fix+0xa7 sys/uvm/uvm_map.c:1886 #2 uvm_map_inentry+0xc5 sys/uvm/uvm_map.c:1917 #3 syscall+0x3d1 mi_syscall sys/sys/syscall_mi.h:87 [inline] #3 syscall+0x3d1 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10162 6396K 6416K 78643K 11440 0 pcb 13 12K 14K 78643K 17 0 rtable 110 3K 4K 78643K 4176 0 ifaddr 39 11K 12K 78643K 477 0 sysctl 3 1K 5K 78643K 16 0 counters 44 34K 34K 78643K 168 0 ioctlops 0 0K 2K 78643K 357 0 iov 0 0K 32K 78643K 4172 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1209 76K 76K 78643K 9703 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 293 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 3230 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 7 21K 33K 78643K 35670 0 sigio 0 0K 0K 78643K 319 0 proc 56 74K 99K 78643K 4343 0 subproc 26 1K 1K 78643K 832 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3218 0 in_multi 33 2K 2K 78643K 1162 0 ether_multi 1 0K 0K 78643K 181 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 289 1288K 1288K 78643K 289 0 exec 0 0K 2K 78643K 5748 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 311 38K 55K 78643K 470642 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1178 0 NDP 5 0K 0K 78643K 195 0 temp 76 4195K 4291K 78643K 87680 0 kqueue 12 18K 30K 78643K 2669 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 3677 0 3674 52 51 1 7 0 8 0 rtentry 112 784 0 738 2 0 2 2 0 8 0 unpcb 128 31484 0 31471 278 273 5 9 0 8 4 syncache 296 313 0 313 78 78 0 1 0 8 0 tcpqe 32 78 0 78 36 36 0 1 0 8 0 tcpcb 736 13150 0 13140 456 449 7 19 0 8 6 arp 120 139 0 133 1 0 1 1 0 8 0 ipq 40 53 0 53 25 25 0 1 0 8 0 ipqe 40 617 0 617 25 25 0 1 0 8 0 inpcb 304 53490 0 53481 542 536 6 16 0 8 5 rttmr 72 27 0 27 5 5 0 1 0 8 0 ip6q 72 149 0 149 15 15 0 1 0 8 0 ip6af 40 318 0 318 15 15 0 1 0 8 0 nd6 48 235 0 227 1 0 1 1 0 8 0 kcovpl 48 64 0 62 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3427 0 3223 33 20 13 18 0 8 0 art_table 32 3428 0 3223 6 4 2 3 0 8 0 art_node 16 783 0 741 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 3221 0 3211 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 49638 0 48156 101 8 93 93 0 8 0 ffsino 272 49638 0 48156 102 2 100 100 0 8 0 nchpl 144 95562 0 93955 60 0 60 60 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 327518 0 327518 5 4 1 1 0 8 1 percpumem 16 96 0 62 1 0 1 1 0 8 0 scxspl 216 288344 0 288342 113 112 1 8 0 8 0 plimitpl 152 7570 0 7560 1 0 1 1 0 8 0 sigapl 424 35706 0 35673 4 0 4 4 0 8 0 futexpl 64 285735 0 285735 5 4 1 1 0 8 1 knotepl 112 477 0 0 3 0 3 3 0 8 0 kqueuepl 216 15026 0 14985 259 256 3 10 0 8 0 pipepl 336 11708 0 11698 293 291 2 11 0 8 0 fdescpl 496 35691 0 35673 3 0 3 3 0 8 0 filepl 152 271744 0 271640 472 463 9 14 0 8 4 lockfpl 104 4223 0 4221 3 2 1 2 0 8 0 lockfspl 48 1292 0 1290 1 0 1 1 0 8 0 sessionpl 144 79 0 69 1 0 1 1 0 8 0 pgrppl 48 245 0 235 1 0 1 1 0 8 0 ucredpl 96 48769 0 48757 1 0 1 1 0 8 0 zombiepl 144 35673 0 35672 3 2 1 1 0 8 0 processpl 1064 35706 0 35672 3 0 3 3 0 8 0 procpl 672 113017 0 112972 45 40 5 6 0 8 1 srpgc 96 1 0 1 1 1 0 1 0 8 0 sosppl 168 5540 0 5540 36 35 1 1 0 8 1 sockpl 480 89832 0 89807 1628 1616 12 34 0 8 8 mcl64k 65536 73 0 0 6 3 3 3 0 8 0 mcl16k 16384 59 0 0 6 4 2 3 0 8 0 mcl12k 12288 65 0 0 2 0 2 2 0 8 0 mcl9k 9216 49 0 0 3 1 2 2 0 8 0 mcl8k 8192 57 0 0 4 1 3 3 0 8 0 mcl4k 4096 81 0 0 5 2 3 3 0 8 0 mcl2k2 2112 30 0 0 2 1 1 2 0 8 0 mcl2k 2048 630 0 0 30 13 17 21 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 8158 0 0 424 2 422 422 0 8 0 bufpl 288 71665 0 65340 455 2 453 453 0 8 0 anonpl 24 10616132 0 10603525 699 598 101 105 0 186 14 amapchunkpl 152 1186851 0 1186287 307 272 35 37 0 158 12 amappl16 200 105515 0 105147 591 564 27 34 0 8 7 amappl15 192 7071 0 7064 1 0 1 1 0 8 0 amappl14 184 2435 0 2433 1 0 1 1 0 8 0 amappl13 176 2045 0 2042 1 0 1 1 0 8 0 amappl12 168 10452 0 10449 1 0 1 1 0 8 0 amappl11 160 904 0 890 1 0 1 1 0 8 0 amappl10 152 3574 0 3570 1 0 1 1 0 8 0 amappl9 144 8144 0 8142 1 0 1 1 0 8 0 amappl8 136 3664 0 3512 6 0 6 6 0 8 0 amappl7 128 2055 0 2047 1 0 1 1 0 8 0 amappl6 120 8226 0 8211 1 0 1 1 0 8 0 amappl5 112 33479 0 33460 1 0 1 1 0 8 0 amappl4 104 3564 0 3532 1 0 1 1 0 8 0 amappl3 96 13548 0 13532 1 0 1 1 0 8 0 amappl2 88 45312 0 45263 7 5 2 2 0 8 0 amappl1 80 622826 0 622397 12 2 10 12 0 8 0 amappl 88 467999 0 467824 5 0 5 5 0 92 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 35691 0 35673 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 35691 0 35673 1 0 1 1 0 8 0 vmmpekpl 168 281987 0 281970 2 0 2 2 0 8 0 vmmpepl 168 3315731 0 3313952 581 489 92 102 0 357 0 vmsppl 368 35690 0 35673 2 0 2 2 0 8 0 rwobjpl 56 826236 0 818976 130 24 106 106 0 8 1 pdppl 4096 71390 0 71346 71 25 46 50 0 8 2 pvpl 32 17227447 0 17211161 1229 1062 167 202 0 265 26 pmappl 248 35690 0 35673 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 2000 0 828 34 0 34 34 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff827adff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000246a3d10,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000246a3ee0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000246a3ee0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe1dcfec500, count: 6 ddb{0}> trace x86_ipi_db(ffffffff827adff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000246a3d10,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff8000246a3ee0) at syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff8000246a3ee0) at syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe1dcfec500, count: -9 ddb{0}> machine ddbcpu 1 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi uvm_fault_lower(ffff8000246b6a00,ffff8000246b6a38,ffff8000246b6980,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffb80,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff8000246b6b90,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000246b6b90) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021280000,ffff8000246b6e08,ffff8000246b6e60) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246b6ed0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246b6ed0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe2254e34f0, count: 6 ddb{1}> trace uvm_fault_lower(ffff8000246b6a00,ffff8000246b6a38,ffff8000246b6980,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffb80,20001000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff8000246b6b90,20001880) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff8000246b6b90) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 sys_preadv(ffff800021280000,ffff8000246b6e08,ffff8000246b6e60) at sys_preadv+0x5a sys/kern/vfs_syscalls.c:3281 syscall(ffff8000246b6ed0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000246b6ed0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xbe2254e34f0, count: -9