uvm_fault(0xffffffff83b34cb8, 0xffff80001bd627d3, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 115460 90309 0 0x2 0 0 syz-executor *256542 26064 0 0x2 0x1 1K syz-executor memset() at memset+0x49 ffs_write(ffff80002a303d70) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd800f7af1d8,ffff80002a303e20,3,fffffd80097fd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a2222a8,fffffd800f7af1d8,fffffd80097fd750,ffff80002a303ef0,ffff80002a303ed0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80002a304080) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a304080) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da224ae8510, count: 8 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(0xffffffff83b34cb8, 0xffff80001bd627d3, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a303d70) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd800f7af1d8,ffff80002a303e20,3,fffffd80097fd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a2222a8,fffffd800f7af1d8,fffffd80097fd750,ffff80002a303ef0,ffff80002a303ed0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80002a304080) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a304080) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da224ae8510, count: -7 ddb{1}> show registers rdi 0xffff80001bd627d3 rsi 0 rbp 0xffff80002a303c90 rbx 0x847d3 acpi_pdirpa+0x70644 rdx 0x5 rcx 0x5 rax 0 r8 0x3828 __ALIGN_SIZE+0x2828 r9 0xffff80002a303bf0 r10 0xca41c80c4407498d r11 0xffff80001bd627d3 r12 0x7d3 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffffd800f7af1d8 r15 0x1 rip 0xffffffff82ded419 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a303a88 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=256542 pid=26064 tcnt=1 stat=onproc flags process=2 proc=1 runpri=78, usrpri=78, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a222fa0,0xffff8000fffefcb0 process=0xffff8000ffff4e78 user=0xffff80002a2ff000, vmspace=0xfffffd806f381008 estcpu=28, cpticks=128, pctcpu=1.16, user=0, sys=128, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37870 325321 41601 0 2 0 syz-executor 37870 264193 41601 0 3 0x4000080 fsleep syz-executor 37870 269030 41601 0 3 0x4000080 fsleep syz-executor 37870 433545 41601 0 3 0x4000080 fsleep syz-executor 62281 93801 31432 0 2 0 syz-executor 62281 468848 31432 0 2 0x4000000 syz-executor 62281 445616 31432 0 3 0x4000080 fsleep syz-executor 62281 116088 31432 0 3 0x4000080 fsleep syz-executor 26737 7090 26064 -1 2 0x10 syz-executor 26737 35500 26064 -1 3 0x4000090 fsleep syz-executor 26737 336778 26064 -1 3 0x4000090 fsleep syz-executor 47495 287192 6728 0 2 0 syz-executor 47495 401575 6728 0 3 0x4000080 fsleep syz-executor 47495 34447 6728 0 3 0x4000080 fsleep syz-executor 62601 80495 99563 0 2 0x2 syz-executor 41601 225609 99563 0 3 0x82 nanoslp syz-executor 90309 115460 99563 0 7 0x2 syz-executor 31432 129555 99563 0 3 0x82 nanoslp syz-executor 16594 112394 99563 0 3 0x82 nanoslp syz-executor *26064 256542 99563 0 7 0x3 syz-executor 6728 222685 99563 0 2 0x3 syz-executor 99563 93767 15534 0 3 0x82 wait syz-executor 15534 161397 67251 0 3 0x10008a sigsusp ksh 67251 158339 42389 0 3 0x98 kqread sshd-session 42389 514825 66383 0 3 0x92 kqread sshd-session 15668 447042 1 0 3 0x100083 ttyin getty 66383 333121 1 0 3 0x88 kqread sshd 45318 327717 23125 74 3 0x1100092 bpf pflogd 23125 10474 1 0 3 0x80 sbwait pflogd 49019 101374 9946 73 3 0x1100090 kqread syslogd 9946 209256 1 0 3 0x100082 sbwait syslogd 66631 186098 1 0 3 0x100080 kqread resolvd 11713 382385 33425 77 3 0x100092 kqread dhcpleased 61346 443332 33425 77 3 0x100092 kqread dhcpleased 33425 8327 1 0 3 0x80 kqread dhcpleased 76561 45212 0 0 3 0x14200 bored smr 13302 87193 0 0 2 0x14200 zerothread 39783 118454 0 0 3 0x14200 aiodoned aiodoned 76538 267800 0 0 3 0x14200 syncer update 16922 316949 0 0 3 0x14200 cleaner cleaner 8115 301386 0 0 3 0x14200 reaper reaper 7095 44469 0 0 3 0x14200 pgdaemon pagedaemon 6090 399795 0 0 3 0x14200 bored viomb 95468 371260 0 0 3 0x40014200 acpi0 acpi0 59825 163592 0 0 3 0x40014200 idle1 51386 227460 0 0 3 0x14200 bored softnet1 97285 516365 0 0 3 0x14200 bored softnet0 91750 514486 0 0 3 0x14200 bored systqmp 61623 505045 0 0 3 0x14200 bored systq 81158 370639 0 0 3 0x14200 tmoslp softclockmp 43911 24338 0 0 3 0x40014200 tmoslp softclock 54661 31372 0 0 3 0x40014200 idle0 1 270521 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 90309 (syz-executor) thread 0xffff8000fffeea78 (115460) exclusive rwlock vmmaplk r = 0 (0xfffffd806c44e8c0) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3752 #4 process_new+0x583 sys/kern/kern_fork.c:282 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b063100) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5171 #3 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3743 #4 process_new+0x583 sys/kern/kern_fork.c:282 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 Process 26064 (syz-executor) thread 0xffff80002a2222a8 (256542) exclusive rrwlock inode r = 0 (0xfffffd806c6700c8) #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:686 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:689 #7 ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 #8 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #8 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e5c40) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 #2 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #2 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #3 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11065 12104K 12364K 166960K 12360 0 pcb 17 12K 12K 166960K 45 0 rtable 230 8K 9K 166960K 402 0 pf 34 17K 82K 166960K 80 0 ifaddr 39 6K 7K 166960K 53 0 ifgroup 51 2K 2K 166960K 70 0 sysctl 4 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 214 0 ioctlops 0 0K 4K 166960K 1575 0 iov 0 0K 12K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1361 86K 86K 166960K 1577 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 7 20K 20K 166960K 10 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 282 0 sigio 0 0K 0K 166960K 7 0 proc 71 115K 164K 166960K 575 0 subproc 64 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 19 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 418 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 233 159K 169K 166960K 4443 0 UVM aobj 4 2K 2K 166960K 5 0 pinsyscall 41 82K 108K 166960K 1471 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 11 0K 2K 166960K 34 0 temp 39 9111K 9178K 166960K 12116 0 kqueue 14 22K 26K 166960K 53 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 47 0 43 1 0 1 1 0 8 0 rtentry 176 115 0 16 6 0 6 6 0 8 0 unpcb 144 108 0 87 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 115 0 111 7 0 7 7 0 8 6 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 237 0 229 8 1 7 7 0 8 6 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 8 0 1 1 0 1 1 0 8 0 ppxss 1192 71 0 71 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 6 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 3 0 0 1 0 1 1 0 8 0 pfstitem 24 32 0 1 1 0 1 1 0 8 0 pfstkey 128 34 0 3 1 0 1 1 0 8 0 pfstate 448 32 0 2 4 0 4 4 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 256 459 0 46 29 0 29 29 0 8 1 art_table 40 460 0 46 5 0 5 5 0 8 0 art_node 32 114 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 64 6 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1870 0 398 93 0 93 93 0 8 0 ffsino 296 1871 0 399 114 0 114 114 0 8 0 nchpl 144 2274 0 567 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2096 0 0 117 0 117 117 0 8 0 namei 1024 7522 0 7522 2 1 1 1 0 8 1 percpumem 16 122 0 73 1 0 1 1 0 8 0 kstatmem 264 39 0 14 3 0 3 3 0 8 1 scxspl 216 7943 0 7943 11 3 8 8 1 8 8 plimitpl 152 79 0 62 1 0 1 1 0 8 0 sigapl 424 607 0 561 7 1 6 7 0 8 0 knotepl 120 484 0 0 15 0 15 15 0 8 0 kqueuepl 224 54 0 44 1 0 1 1 0 8 0 pipepl 344 136 0 109 3 0 3 3 0 8 0 fdescpl 528 591 0 561 3 0 3 3 0 8 0 filepl 160 2701 0 2455 15 3 12 13 0 8 0 lockfpl 104 85 0 83 1 0 1 1 0 8 0 lockfspl 48 38 0 36 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 365 0 351 1 0 1 1 0 8 0 zombiepl 144 627 0 625 2 1 1 1 0 8 0 processpl 1232 607 0 561 5 0 5 5 0 8 1 procpl 664 879 0 823 6 0 6 6 0 8 0 sockpl 752 398 0 365 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 155 0 0 10 0 10 10 0 8 0 bufpl 280 2715 0 105 187 0 187 187 0 8 0 anonpl 32 5393 0 0 44 0 44 44 0 246 0 amapchunkpl 152 12638 0 12162 26 4 22 24 0 158 2 amappl16 200 1455 0 1429 5 2 3 4 0 8 0 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 441 0 440 1 0 1 1 0 8 0 amappl13 176 126 0 114 1 0 1 1 0 8 0 amappl12 168 848 0 820 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 137 0 123 1 0 1 1 0 8 0 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 97 0 95 1 0 1 1 0 8 0 amappl7 128 164 0 151 1 0 1 1 0 8 0 amappl6 120 156 0 155 1 0 1 1 0 8 0 amappl5 112 97 0 87 1 0 1 1 0 8 0 amappl4 104 303 0 280 1 0 1 1 0 8 0 amappl3 96 2462 0 2352 4 0 4 4 0 8 1 amappl2 88 551 0 492 2 0 2 2 0 8 0 amappl1 80 11130 0 10532 15 2 13 15 0 8 0 amappl 88 3673 0 3512 6 1 5 5 0 92 1 uvmvnodes 80 108 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 1 1 0 1 1 0 8 0 uaddrrnd 24 591 0 561 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 591 0 561 1 0 1 1 0 8 0 vmmpekpl 168 6844 0 6793 3 0 3 3 0 8 0 vmmpepl 168 45938 0 44100 87 0 87 87 0 357 3 vmsppl 488 590 0 561 5 1 4 5 0 8 0 rwobjpl 80 15898 0 14856 24 1 23 24 0 8 0 pdppl 4096 1189 0 1122 111 40 71 87 0 8 4 pvpl 32 12241 0 0 100 1 99 99 0 265 0 pmappl 256 590 0 561 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 291 0 45 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8399bff0) 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(ffffffff839e5440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5440) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839e5440) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5440) at __mp_lock+0x199 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff839e5440,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff83a01a00,1) at pool_get+0x27e sys/kern/subr_pool.c:595 uvm_mapent_alloc(fffffd806c44e7c0,0) at uvm_mapent_alloc+0x354 sys/uvm/uvm_map.c:-1 uvm_map_mkentry(fffffd806c44e7c0,fffffd806c3ec400,fffffd806c3ec400,d64a3da6000,3ff000,0,8d8a7ade1b0931e3,3ff000) at uvm_map_mkentry+0x87 sys/uvm/uvm_map.c:-1 uvm_mapent_clone(fffffd806c44e7c0,d64a3da6000,3ff000,0,1,7,357daeb5d62d98f1,1,0,fffffd806c668b58) at uvm_mapent_clone+0xba sys/uvm/uvm_map.c:3481 uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a uvm_mapent_share sys/uvm/uvm_map.c:3536 [inline] uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a uvm_mapent_forkshared sys/uvm/uvm_map.c:3551 [inline] uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a sys/uvm/uvm_map.c:3772 end trace frame: 0xffff80002a35dfe0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8399bff0) 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(ffffffff839e5440) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5440) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff839e5440) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5440) at __mp_lock+0x199 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff839e5440,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff83a01a00,1) at pool_get+0x27e sys/kern/subr_pool.c:595 uvm_mapent_alloc(fffffd806c44e7c0,0) at uvm_mapent_alloc+0x354 sys/uvm/uvm_map.c:-1 uvm_map_mkentry(fffffd806c44e7c0,fffffd806c3ec400,fffffd806c3ec400,d64a3da6000,3ff000,0,8d8a7ade1b0931e3,3ff000) at uvm_map_mkentry+0x87 sys/uvm/uvm_map.c:-1 uvm_mapent_clone(fffffd806c44e7c0,d64a3da6000,3ff000,0,1,7,357daeb5d62d98f1,1,0,fffffd806c668b58) at uvm_mapent_clone+0xba sys/uvm/uvm_map.c:3481 uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a uvm_mapent_share sys/uvm/uvm_map.c:3536 [inline] uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a uvm_mapent_forkshared sys/uvm/uvm_map.c:3551 [inline] uvmspace_fork(ffff8000ffff5348) at uvmspace_fork+0x32a sys/uvm/uvm_map.c:3772 process_new(ffff8000fffe6020,ffff8000ffff5348,1) at process_new+0x583 sys/kern/kern_fork.c:282 fork1(ffff8000fffeea78,1,ffffffff819eb450,0,ffff80002a35e0d0,0) at fork1+0x3f6 sys/kern/kern_fork.c:-1 syscall(ffff80002a35e180) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35e180) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6208b734b0, count: -18 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a303d70) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd800f7af1d8,ffff80002a303e20,3,fffffd80097fd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a2222a8,fffffd800f7af1d8,fffffd80097fd750,ffff80002a303ef0,ffff80002a303ed0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80002a304080) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a304080) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da224ae8510, count: 8 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a303d70) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd800f7af1d8,ffff80002a303e20,3,fffffd80097fd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a2222a8,fffffd800f7af1d8,fffffd80097fd750,ffff80002a303ef0,ffff80002a303ed0) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2222a8,b,20,ffff80002a304080) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff80002a304080) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a304080) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da224ae8510, count: -7