login: uvm_fault(0xfffff2000b1f77a0, 0x100000098, 0, 1) -> e kernel: page fault trap, code=0 Stopped at amap_lookups+0x1e0: movl 0x10(%r15),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND *237223 17623 0 0 0 1 syz-executor 419919 71015 0 0x2 0 0 syz-executor amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003c3ce870,ffff80003c3ce8a8,ffff80003c3ce8e0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff2000b1f77a0,a29d7ec4000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3cea10,a29d7ec4bb0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c3cea10) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74aef34e8fd0, count: 9 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(0xfffff2000b1f77a0, 0x100000098, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003c3ce870,ffff80003c3ce8a8,ffff80003c3ce8e0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff2000b1f77a0,a29d7ec4000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3cea10,a29d7ec4bb0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c3cea10) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74aef34e8fd0, count: -6 ddb{1}> show registers rdi 0x11 rsi 0x20 rbp 0xffff80003c3ce6c0 rbx 0 rdx 0 rcx 0 rax 0xffff800000c43ac0 r8 0xffffffff83234620 uvm_map_inentry_sp r9 0 r10 0 r11 0x3dd5aa575018a6a0 r12 0x12 r13 0 r14 0x20 r15 0x100000088 rip 0xffffffff83022d20 amap_lookups+0x1e0 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80003c3ce630 ss 0 amap_lookups+0x1e0: movl 0x10(%r15),%r14d ddb{1}> show proc PROC (syz-executor) tid=237223 pid=17623 tcnt=4 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=0xffff8000383ada18,0xffff8000383ac568 process=0xffff800045fe4e90 user=0xffff80003c3c9000, vmspace=0xfffff2000b1f77a0 estcpu=36, cpticks=7, pctcpu=0.0, user=5, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76246 259879 71015 0 2 0 syz-executor 10233 29702 3095 0 2 0 syz-executor 54479 353073 73856 0 2 0 syz-executor 54479 292596 73856 0 2 0x4000000 syz-executor 65746 463651 25475 0 2 0 syz-executor 65746 174115 25475 0 3 0x4000080 kqsel syz-executor *17623 237223 59728 0 7 0 syz-executor 17623 58996 59728 0 3 0x4000080 bell syz-executor 17623 241658 59728 0 3 0x4000080 fsleep syz-executor 17623 105235 59728 0 3 0x4000080 fsleep syz-executor 22872 445878 77252 0 2 0 syz-executor 22872 516045 77252 0 3 0x4000080 fsleep syz-executor 52995 62710 60181 0 3 0x81 nanoslp syz-executor 52995 191367 60181 0 3 0x4000081 ttyout syz-executor 52995 207209 60181 0 3 0x4000081 fsleep syz-executor 3461 59458 28970 0 2 0xc80 syz-executor 3461 178012 28970 0 3 0x4000080 ttyin syz-executor 3461 455716 28970 0 3 0x4000080 fsleep syz-executor 3461 21498 28970 0 3 0x4000080 fsleep syz-executor 93961 458567 1 0 3 0x100083 ttyin getty 25475 4730 30611 0 2 0xc82 syz-executor 60181 112071 30611 0 2 0xc82 syz-executor 77252 396986 30611 0 2 0xc82 syz-executor 71015 419919 30611 0 7 0x2 syz-executor 73856 238229 30611 0 2 0xc82 syz-executor 3095 58735 30611 0 3 0x82 nanoslp syz-executor 28970 330523 30611 0 2 0xc82 syz-executor 59728 120873 30611 0 3 0x82 nanoslp syz-executor 30611 402173 14861 0 3 0x82 kqread syz-executor 14861 142698 84539 0 3 0x10008a sigsusp ksh 84539 235548 12096 0 3 0x98 kqread sshd-session 12096 383005 30921 0 3 0x92 kqread sshd-session 30921 44197 1 0 3 0x88 kqread sshd 7166 357944 29940 74 3 0x1100092 bpf pflogd 29940 185888 1 0 3 0x80 sbwait pflogd 24678 152450 21726 73 3 0x1100090 kqread syslogd 21726 174822 1 0 3 0x100082 sbwait syslogd 86408 283499 1 0 3 0x100080 kqread resolvd 2262 140427 79992 77 3 0x100092 kqread dhcpleased 29014 353692 79992 77 3 0x100092 kqread dhcpleased 79992 107282 1 0 3 0x80 kqread dhcpleased 25551 260328 0 0 3 0x14200 bored smr 94847 100618 0 0 2 0x14200 zerothread 21964 96136 0 0 3 0x14200 aiodoned aiodoned 50456 339086 0 0 3 0x14200 syncer update 38667 120063 0 0 3 0x14200 cleaner cleaner 52176 433257 0 0 3 0x14200 reaper reaper 74478 252095 0 0 3 0x14200 pgdaemon pagedaemon 53610 142054 0 0 3 0x14200 bored viomb 26397 310772 0 0 3 0x40014200 acpi0 acpi0 85614 386425 0 0 3 0x40014200 idle1 27284 213534 0 0 3 0x14200 bored softnet1 51951 387201 0 0 3 0x14200 bored softnet0 80036 470502 0 0 3 0x14200 bored systqmp 65717 380235 0 0 3 0x14200 bored systq 75657 124604 0 0 3 0x14200 tmoslp softclockmp 88244 106366 0 0 3 0x40014200 tmoslp softclock 36317 128826 0 0 3 0x40014200 idle0 1 386308 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17623 (syz-executor) thread 0xffff8000383ac028 (237223) shared rwlock amaplk r = 0 (0xfffff2006f058430) #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 (0xfffff2000b1f78a0) #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 Process 71015 (syz-executor) thread 0xffff80002a221ca0 (419919) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83a6f680) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 biowait+0xc6 sys/kern/vfs_bio.c:1110 #4 bwrite+0x359 sys/kern/vfs_bio.c:625 #5 ffs_update+0x2fe sys/ufs/ffs/ffs_inode.c:111 #6 ffs_truncate+0xc9b sys/ufs/ffs/ffs_inode.c:-1 #7 ufs_rmdir+0x2f1 sys/ufs/ufs/ufs_vnops.c:1265 #8 VOP_RMDIR+0x192 sys/kern/vfs_vops.c:413 #9 dounlinkat+0x2e0 sys/kern/vfs_syscalls.c:1840 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff2006cba71f0) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff2006d593430) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12155K 12417K 166960K 12368 0 pcb 17 12K 12K 166960K 63 0 rtable 227 7K 7K 166960K 411 0 pf 39 18K 26K 166960K 106 0 ifaddr 39 6K 7K 166960K 55 0 ifgroup 54 2K 2K 166960K 80 0 sysctl 2 1K 9K 166960K 6 0 counters 68 36K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1601 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1556 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 93K 166960K 378 0 sigio 0 0K 0K 166960K 37 0 proc 72 115K 164K 166960K 594 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 24 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 404 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 230 159K 173K 166960K 5235 0 UVM aobj 21 4K 4K 166960K 22 0 pinsyscall 43 86K 107K 166960K 1541 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 14 0 NDP 11 0K 2K 166960K 36 0 temp 40 9114K 9180K 166960K 14600 0 kqueue 14 22K 29K 166960K 70 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 44 0 41 1 0 1 1 0 8 0 rtentry 176 117 0 15 6 0 6 6 0 8 0 unpcb 144 159 0 141 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 52 0 48 1 0 1 1 0 8 0 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 246 0 236 2 0 2 2 0 8 0 nd6 152 27 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 10 0 10 1 0 1 1 0 8 1 pfstscr 40 5 0 3 1 0 1 1 0 8 0 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 5 0 3 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 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 48 0 0 1 0 1 1 0 8 0 pfstkey 128 52 0 4 2 0 2 2 0 8 0 pfstate 448 48 0 2 6 0 6 6 0 8 0 pfrule 1360 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 463 0 46 29 0 29 29 0 8 2 art_table 40 464 0 46 5 0 5 5 0 8 0 art_node 32 117 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 72 15 0 7 1 0 1 1 0 8 0 shmpl 112 19 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2018 0 556 93 0 93 93 0 8 0 ffsino 296 2018 0 556 114 0 114 114 0 8 0 nchpl 144 2533 0 830 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 vnodes 216 2213 0 0 123 0 123 123 0 8 0 namei 1024 7829 0 7829 1 0 1 1 0 8 1 percpumem 16 63 0 13 1 0 1 1 0 8 0 kstatmem 264 43 0 18 2 0 2 2 0 8 0 scxspl 216 8575 0 8575 4 3 1 3 1 8 1 plimitpl 152 51 0 34 1 0 1 1 0 8 0 sigapl 424 697 0 649 7 0 7 7 0 8 1 knotepl 120 564 0 0 18 0 18 18 0 8 0 kqueuepl 224 117 0 107 3 0 3 3 0 8 2 pipepl 344 144 0 117 3 0 3 3 0 8 0 fdescpl 528 681 0 649 3 0 3 3 0 8 0 filepl 160 2973 0 2754 12 0 12 12 0 8 1 lockfpl 104 191 0 189 1 0 1 1 0 8 0 lockfspl 48 51 0 49 1 0 1 1 0 8 0 sessionpl 144 39 0 29 1 0 1 1 0 8 0 pgrppl 48 48 0 30 1 0 1 1 0 8 0 ucredpl 104 388 0 375 1 0 1 1 0 8 0 zombiepl 144 649 0 649 1 0 1 1 0 8 1 processpl 1232 697 0 649 5 0 5 5 0 8 0 procpl 664 1069 0 1010 6 0 6 6 0 8 0 sockpl 752 518 0 487 5 0 5 5 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 213 0 0 14 0 14 14 0 8 0 bufpl 272 2913 0 105 188 0 188 188 0 8 0 anonpl 32 7439 0 0 60 0 60 60 0 247 0 amapchunkpl 152 16300 0 15834 30 1 29 29 0 158 8 amappl16 200 1827 0 1801 5 3 2 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 438 0 437 1 0 1 1 0 8 0 amappl13 176 125 0 113 1 0 1 1 0 8 0 amappl12 168 930 0 901 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 305 0 305 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 151 0 138 1 0 1 1 0 8 0 amappl6 120 158 0 155 1 0 1 1 0 8 0 amappl5 112 99 0 89 1 0 1 1 0 8 0 amappl4 104 311 0 290 1 0 1 1 0 8 0 amappl3 96 3056 0 2946 4 0 4 4 0 8 0 amappl2 88 548 0 485 2 0 2 2 0 8 0 amappl1 80 11582 0 10974 15 1 14 15 0 8 1 amappl 88 4460 0 4302 5 0 5 5 0 92 0 uvmvnodes 80 106 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 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 21 0 1 1 0 1 1 0 8 0 uaddrrnd 24 681 0 649 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 681 0 649 1 0 1 1 0 8 0 vmmpekpl 168 7468 0 7436 2 0 2 2 0 8 0 vmmpepl 168 51451 0 49498 88 0 88 88 0 357 0 vmsppl 488 680 0 649 5 0 5 5 0 8 1 rwobjpl 80 17043 0 15987 24 1 23 24 0 8 0 pdppl 4096 1369 0 1298 99 28 71 85 0 8 0 pvpl 32 15558 0 0 126 0 126 126 0 265 0 pmappl 256 680 0 649 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 467 0 31 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838ebff0) 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 __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a3264b0,ffff80000006eb00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a326680) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a326680) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cf8b823eeb0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff838ebff0) 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 __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a3264b0,ffff80000006eb00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x18f __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6ee80) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002a326680) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a326680) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cf8b823eeb0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at amap_lookups+0x1e0: movl 0x10(%r15),%r14d amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003c3ce870,ffff80003c3ce8a8,ffff80003c3ce8e0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff2000b1f77a0,a29d7ec4000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3cea10,a29d7ec4bb0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c3cea10) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74aef34e8fd0, count: 9 ddb{1}> trace amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff200705ade58,a000,ffff80003c3ce770,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80003c3ce870,ffff80003c3ce8a8,ffff80003c3ce8e0,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff2000b1f77a0,a29d7ec4000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80003c3cea10,a29d7ec4bb0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80003c3cea10) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x74aef34e8fd0, count: -6