uvm_fault(0xffffffff835e7fb8, 0xffff800029a020a0, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND 337759 61472 0 0x2 0 0 syz-executor *351698 38340 0 0x100000 0x1 1K resolvd ffs2_balloc(fffffd800d3357a8,80e7d,67,fffffd807f7d30d0,1,ffff80002a4378f8) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a437980) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f50a440,ffff80002a437a38,3,fffffd807f7d30d0) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffaa30,fffffd805f50a440,fffffd807f7d30d0,ffff80002a437b08,ffff80002a437ae0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrstruct(ffff8000ffffaa30,ffffffff8315c45c,ffff80002a437cc0,20) at ktrstruct+0x19a sys/kern/kern_ktrace.c:314 sys_kevent(ffff8000ffffaa30,ffff80002a437f50,ffff80002a437ea0) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a437f50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a437f50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7371b85a85b0, count: 7 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(0xffffffff835e7fb8, 0xffff800029a020a0, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd800d3357a8,80e7d,67,fffffd807f7d30d0,1,ffff80002a4378f8) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a437980) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f50a440,ffff80002a437a38,3,fffffd807f7d30d0) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffaa30,fffffd805f50a440,fffffd807f7d30d0,ffff80002a437b08,ffff80002a437ae0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrstruct(ffff8000ffffaa30,ffffffff8315c45c,ffff80002a437cc0,20) at ktrstruct+0x19a sys/kern/kern_ktrace.c:314 sys_kevent(ffff8000ffffaa30,ffff80002a437f50,ffff80002a437ea0) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a437f50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a437f50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7371b85a85b0, count: -8 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a4378a0 rbx 0 rdx 0 rcx 0xffff800029a02000 rax 0x14 r8 0xffffffffffffffff r9 0xffff80002a4378f8 r10 0x89b2bbb9c164d80c r11 0xf2f70ad71cf62adf r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd805e4c46c0 rip 0xffffffff81c2ea1e ffs2_balloc+0x9fe cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a437730 ss 0x10 ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (resolvd) tid=351698 pid=38340 tcnt=1 stat=onproc flags process=100000 proc=1 runpri=24, usrpri=51, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffa010,0xffff8000ffffb6e8 process=0xffff80002a40f010 user=0xffff80002a433000, vmspace=0xfffffd807eb8d558 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77579 23704 42467 0 2 0 syz-executor 10470 133103 61472 0 2 0 syz-executor 10470 316289 61472 0 3 0x4000080 fsleep syz-executor 71773 78304 92137 0 2 0 syz-executor 71773 69713 92137 0 3 0x4000080 fsleep syz-executor 79556 494027 53899 0 2 0 syz-executor 79556 116999 53899 0 3 0x4000080 fsleep syz-executor 66675 91443 38002 0 2 0 syz-executor 66675 90190 38002 0 3 0x4000080 sbwait syz-executor 66675 64678 38002 0 2 0x4000000 syz-executor 11490 521101 83284 0 3 0x3000 suspend syz-executor 11490 448448 83284 0 2 0x4081000 syz-executor 4188 387184 3320 0 2 0x480 syz-executor 4188 430324 3320 0 3 0x4000080 kqsel syz-executor 4188 177907 3320 0 3 0x4000080 fsleep syz-executor 4188 439931 3320 0 3 0x4000080 fsleep syz-executor 89753 118967 1 0 3 0x82 nanoslp getty 85344 405 0 0 3 0x14200 acct acct 53899 195204 92597 0 3 0x82 nanoslp syz-executor 25604 111486 0 0 3 0x14200 bored sosplice 92137 227673 92597 0 2 0x482 syz-executor 61472 337759 92597 0 7 0x2 syz-executor 3320 223011 92597 0 2 0x2 syz-executor 83284 126804 92597 0 3 0x82 nanoslp syz-executor 21871 35562 92597 0 3 0x82 nanoslp syz-executor 38002 196546 92597 0 3 0x82 nanoslp syz-executor 42467 184515 92597 0 3 0x82 nanoslp syz-executor 92597 200470 23353 0 3 0x82 kqread syz-executor 23353 10681 27617 0 3 0x10008a sigsusp ksh 27617 116689 11298 0 3 0x98 kqread sshd-session 11298 168980 4768 0 3 0x92 kqread sshd-session 4768 227565 1 0 3 0x88 kqread sshd 79931 296807 87573 74 3 0x1100092 bpf pflogd 87573 67992 1 0 3 0x80 sbwait pflogd 85026 406488 22822 73 3 0x1100090 kqread syslogd 22822 140352 1 0 3 0x100082 sbwait syslogd *38340 351698 1 0 7 0x100001 resolvd 74210 352560 16086 77 2 0x100092 dhcpleased 9372 225406 16086 77 3 0x100092 kqread dhcpleased 16086 452774 1 0 3 0x80 kqread dhcpleased 76546 453541 0 0 3 0x14200 bored smr 99089 73820 0 0 2 0x14200 zerothread 1536 107173 0 0 3 0x14200 aiodoned aiodoned 76705 73067 0 0 3 0x14200 syncer update 2900 32912 0 0 3 0x14200 cleaner cleaner 48876 272028 0 0 3 0x14200 reaper reaper 70375 136544 0 0 3 0x14200 pgdaemon pagedaemon 38992 449491 0 0 3 0x14200 bored viomb 3431 401339 0 0 3 0x40014200 acpi0 acpi0 80677 298373 0 0 3 0x40014200 idle1 54527 453251 0 0 3 0x14200 bored softnet3 80340 123657 0 0 3 0x14200 bored softnet2 54387 151407 0 0 3 0x14200 bored softnet1 33262 315482 0 0 3 0x14200 bored softnet0 33908 82069 0 0 3 0x14200 bored systqmp 93676 450577 0 0 3 0x14200 bored systq 5808 473326 0 0 3 0x14200 tmoslp softclockmp 90178 331140 0 0 3 0x40014200 tmoslp softclock 400 229233 0 0 3 0x40014200 idle0 1 439495 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 77579 (syz-executor) thread 0xffff8000ffffb1c8 (23704) exclusive rwlock vmmaplk r = 0 (0xfffffd8065de1128) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5250 #3 uvm_mapanon+0x292 #4 uvm_mmapanon+0x1d0 sys/uvm/uvm_mmap.c:1024 #5 sys_mmap+0xa96 sys/uvm/uvm_mmap.c:426 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 11490 (syz-executor) thread 0xffff8000ffffa520 (448448) exclusive rwlock clonelk r = 0 (0xffffffff8352b3d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 if_clone_create+0x65 #3 tun_dev_open+0x1a0 sys/net/if_tun.c:412 #4 spec_open+0x2ec sys/kern/spec_vnops.c:150 #5 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #6 vn_open+0x708 sys/kern/vfs_vnops.c:177 #7 doopenat+0x32e sys/kern/vfs_syscalls.c:1124 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 38340 (resolvd) thread 0xffff8000ffffaa30 (351698) exclusive rrwlock inode r = 0 (0xfffffd800d335848) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:688 #7 ktrstruct+0x19a sys/kern/kern_ktrace.c:314 #8 sys_kevent+0x80f sys/kern/kern_event.c:1184 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff835e3950) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 ktrstruct+0xe2 sys/kern/kern_ktrace.c:313 #2 sys_kevent+0x80f sys/kern/kern_event.c:1184 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #4 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10239 11121K 12371K 166960K 14214 0 pcb 19 15K 16K 166960K 273 0 rtable 190 7K 8K 166960K 702 0 pf 48 20K 23K 166960K 130 0 ifaddr 42 7K 8K 166960K 84 0 ifgroup 73 3K 3K 166960K 133 0 sysctl 4 1K 3K 166960K 7 0 counters 72 37K 37K 166960K 110 0 ioctlops 0 0K 4K 166960K 1626 0 iov 0 0K 16K 166960K 94 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 92K 166960K 2728 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 30 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 142 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 1607 0 sigio 1 0K 0K 166960K 101 0 proc 73 91K 116K 166960K 710 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 172 0 in_multi 79 5K 7K 166960K 164 0 ether_multi 1 0K 0K 166960K 13 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 629 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 239 73K 101K 166960K 16552 0 UVM aobj 61 7K 7K 166960K 63 0 pinsyscall 43 86K 107K 166960K 2739 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 67 0 NDP 16 0K 2K 166960K 57 0 temp 78 6900K 7156K 166960K 67232 0 kqueue 14 22K 29K 166960K 231 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 231 0 228 4 3 1 3 0 8 0 rtentry 112 237 0 156 4 0 4 4 0 8 0 unpcb 144 1120 0 1099 6 5 1 4 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 765 0 694 29 21 8 8 0 8 0 arp 120 52 0 35 1 0 1 1 0 8 0 inpcb 376 2111 0 1970 36 21 15 15 0 8 0 nd6 136 32 0 13 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 11 0 11 3 2 1 1 0 8 1 pffrag 232 16 0 5 1 0 1 1 0 482 0 pffrnode 88 16 0 5 1 0 1 1 0 8 0 pffrent 40 34 0 23 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 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 120 0 47 1 0 1 1 0 8 0 pfstkey 128 122 0 49 3 0 3 3 0 8 0 pfstate 376 120 0 48 9 0 9 9 0 8 0 pfrule 1344 32 0 27 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 795 0 437 30 6 24 28 0 8 1 art_table 32 798 0 437 4 0 4 4 0 8 0 art_node 16 228 0 156 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 2 2 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 139 0 129 2 1 1 1 0 8 0 shmpl 112 60 0 2 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4305 0 2796 95 0 95 95 0 8 0 ffsino 280 4305 0 2796 109 0 109 109 0 8 0 nchpl 144 6662 0 4967 64 0 64 64 0 8 0 uvmvnodes 80 5222 0 0 107 0 107 107 0 8 0 vnodes 216 5222 0 0 291 0 291 291 0 8 0 namei 1024 22248 0 22248 2 1 1 1 0 8 1 percpumem 16 69 0 19 1 0 1 1 0 8 0 kstatmem 264 70 0 38 4 1 3 3 0 8 0 scsiplug 72 9 0 9 4 3 1 1 0 8 1 scxspl 216 19936 0 19936 11 10 1 8 1 8 1 plimitpl 152 251 0 234 1 0 1 1 0 8 0 sigapl 424 1931 0 1879 9 2 7 8 0 8 0 futexpl 64 25743 0 25738 2 1 1 1 0 8 0 knotepl 120 523 0 0 15 0 15 15 0 8 0 kqueuepl 216 398 0 387 3 2 1 3 0 8 0 pipepl 328 458 0 430 8 5 3 8 0 8 0 fdescpl 504 1891 0 1859 5 0 5 5 0 8 0 filepl 152 12881 0 12489 27 11 16 17 0 8 0 lockfpl 104 821 0 818 3 2 1 2 0 8 0 lockfspl 48 207 0 204 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 60 0 44 1 0 1 1 0 8 0 ucredpl 104 2268 0 2255 1 0 1 1 0 8 0 zombiepl 144 1972 0 1970 2 1 1 1 0 8 0 processpl 1168 1931 0 1879 7 2 5 6 0 8 0 procpl 648 4372 0 4311 8 2 6 8 0 8 0 srpgc 96 8 0 8 3 3 0 1 0 8 0 sosppl 168 9 0 9 3 3 0 1 0 8 0 sockpl 688 3491 0 3326 35 19 16 16 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 15 0 15 15 0 8 0 mcl2k 2048 45 0 0 6 1 5 6 0 8 0 mtagpl 96 50 0 0 2 0 2 2 0 8 0 mbufpl 256 1876 0 0 116 0 116 116 0 8 0 bufpl 280 6720 0 554 441 0 441 441 0 8 0 anonpl 24 259370 0 252687 78 12 66 66 0 185 16 amapchunkpl 152 54579 0 53965 43 13 30 37 0 158 4 amappl16 200 5265 0 5132 36 16 20 20 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 124 0 112 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 2557 0 2525 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 12 0 11 1 0 1 1 0 8 0 amappl9 144 247 0 246 1 0 1 1 0 8 0 amappl8 136 22 0 19 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 195 0 191 1 0 1 1 0 8 0 amappl5 112 133 0 123 1 0 1 1 0 8 0 amappl4 104 334 0 315 1 0 1 1 0 8 0 amappl3 96 11092 0 10977 5 1 4 4 0 8 0 amappl2 88 693 0 629 2 0 2 2 0 8 0 amappl1 80 13260 0 12680 14 0 14 14 0 8 0 amappl 88 16036 0 15853 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 128 254 0 254 2 2 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 62 0 2 2 0 2 2 0 8 0 uaddrrnd 24 1892 0 1860 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1892 0 1860 1 0 1 1 0 8 0 vmmpekpl 168 16789 0 16749 3 0 3 3 0 8 0 vmmpepl 168 118873 0 116834 120 19 101 101 0 357 8 vmsppl 456 1891 0 1860 6 1 5 5 0 8 0 rwobjpl 64 37002 0 30670 104 1 103 103 0 8 0 pdppl 4096 3791 0 3720 113 42 71 85 0 8 0 pvpl 32 18736 0 0 152 1 151 151 0 265 0 pmappl 248 1891 0 1860 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 435 0 79 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834fdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835e3748) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835e3748) at __mp_lock+0x199 sys/kern/kern_lock.c:144 syscall(ffff80002a532290) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a532290) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afd050220e0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff834fdff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff835e3748) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835e3748) at __mp_lock+0x199 sys/kern/kern_lock.c:144 syscall(ffff80002a532290) at syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a532290) at syscall+0xae6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afd050220e0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ffs2_balloc(fffffd800d3357a8,80e7d,67,fffffd807f7d30d0,1,ffff80002a4378f8) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a437980) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f50a440,ffff80002a437a38,3,fffffd807f7d30d0) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffaa30,fffffd805f50a440,fffffd807f7d30d0,ffff80002a437b08,ffff80002a437ae0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrstruct(ffff8000ffffaa30,ffffffff8315c45c,ffff80002a437cc0,20) at ktrstruct+0x19a sys/kern/kern_ktrace.c:314 sys_kevent(ffff8000ffffaa30,ffff80002a437f50,ffff80002a437ea0) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a437f50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a437f50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7371b85a85b0, count: 7 ddb{1}> trace ffs2_balloc(fffffd800d3357a8,80e7d,67,fffffd807f7d30d0,1,ffff80002a4378f8) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a437980) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805f50a440,ffff80002a437a38,3,fffffd807f7d30d0) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffffaa30,fffffd805f50a440,fffffd807f7d30d0,ffff80002a437b08,ffff80002a437ae0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrstruct(ffff8000ffffaa30,ffffffff8315c45c,ffff80002a437cc0,20) at ktrstruct+0x19a sys/kern/kern_ktrace.c:314 sys_kevent(ffff8000ffffaa30,ffff80002a437f50,ffff80002a437ea0) at sys_kevent+0x80f sys/kern/kern_event.c:1184 syscall(ffff80002a437f50) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a437f50) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7371b85a85b0, count: -8