uvm_fault(0xffffffff83a5fa80, 0xffff800020092000, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *355119 207 0 0 0x4000001 1K syz-executor 83662 48598 0 0 0x1 0 syz-executor ffs2_balloc(fffffd806c0b93a0,32017,50,fffffd80097fd7b8,1,ffff80003c4254a8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c425530) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806aca7628,ffff80003c4255e0,3,fffffd80097fd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000fffe0030,fffffd806aca7628,fffffd80097fd7b8,ffff80003c4256b0,ffff80003c425690) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80003c425830) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003c425830) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x816b864c280, 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(0xffffffff83a5fa80, 0xffff800020092000, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd806c0b93a0,32017,50,fffffd80097fd7b8,1,ffff80003c4254a8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c425530) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806aca7628,ffff80003c4255e0,3,fffffd80097fd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000fffe0030,fffffd806aca7628,fffffd80097fd7b8,ffff80003c4256b0,ffff80003c425690) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80003c425830) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003c425830) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x816b864c280, count: -7 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c425450 rbx 0 rdx 0xffff8000015fd0c0 rcx 0xffff800020092000 rax 0 r8 0xffffffffffffffff r9 0xffff80003c4254a8 r10 0x1f27acfae92e747c r11 0xc933f83039fb90bb r12 0x1 r13 0xffff800000c31800 r14 0xffff80003c4252e0 r15 0xfffffd805eac7d28 rip 0xffffffff81d5db7d ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c4252d0 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (syz-executor) tid=355119 pid=207 tcnt=2 stat=onproc flags process=0 proc=4000001 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe1788,0xffff8000fffe0fd0 process=0xffff8000fffec4e8 user=0xffff80003c420000, vmspace=0xfffffd805e4607c8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 458 412163 18842 0 2 0 syz-executor 458 162596 18842 0 3 0x4000080 fsleep syz-executor 458 139784 18842 0 3 0x4000080 fsleep syz-executor 458 15983 18842 0 2 0x4000000 syz-executor 207 65162 29 0 2 0 syz-executor * 207 355119 29 0 7 0x4000001 syz-executor 84430 64761 52407 0 2 0 syz-executor 84430 165779 52407 0 3 0x4000080 fsleep syz-executor 84430 213249 52407 0 3 0x4000080 fsleep syz-executor 67767 2366 26053 0 2 0 syz-executor 67767 9773 26053 0 3 0x4000080 sbwait syz-executor 91031 480745 85124 -1 2 0x10 syz-executor 91031 26351 85124 -1 3 0x4000090 kqsel syz-executor 91031 134551 85124 -1 3 0x4000090 kqsel syz-executor 30054 15492 59833 0 3 0x80 nanoslp syz-executor 30054 249032 59833 0 3 0x4000080 ttyout syz-executor 30054 208444 59833 0 3 0x4000080 ttyin syz-executor 48598 83662 96077 0 7 0x1 syz-executor 48598 76878 96077 0 3 0x4000080 lockf syz-executor 48598 132240 96077 0 3 0x4000080 ttyout syz-executor 48598 291619 96077 0 3 0x4000080 fsleep syz-executor 26053 305279 40247 0 3 0x82 nanoslp syz-executor 96077 343952 40247 0 3 0x82 nanoslp syz-executor 59833 371161 40247 0 2 0xc82 syz-executor 29 313743 40247 0 2 0xc82 syz-executor 85124 329083 40247 0 3 0x82 nanoslp syz-executor 52407 12146 40247 0 2 0xc82 syz-executor 18842 285261 40247 0 2 0xc82 syz-executor 88242 358070 40247 0 2 0xc82 syz-executor 40247 333992 41021 0 3 0x82 kqread syz-executor 41021 265229 94316 0 3 0x10008a sigsusp ksh 94316 128431 57991 0 3 0x98 kqread sshd-session 57991 146149 716 0 3 0x92 kqread sshd-session 13289 90181 1 0 3 0x100083 ttyin getty 716 287582 1 0 3 0x88 kqread sshd 31179 4722 96040 74 3 0x1100092 bpf pflogd 96040 457514 1 0 3 0x80 sbwait pflogd 69699 509016 93422 73 3 0x1100090 kqread syslogd 93422 152309 1 0 3 0x100082 sbwait syslogd 83494 308937 1 0 3 0x100080 kqread resolvd 25772 492710 61679 77 3 0x100092 kqread dhcpleased 57032 135096 61679 77 3 0x100092 kqread dhcpleased 61679 44164 1 0 3 0x80 kqread dhcpleased 50119 513201 0 0 3 0x14200 bored smr 94816 267010 0 0 2 0x14200 zerothread 7725 33791 0 0 3 0x14200 aiodoned aiodoned 66427 340185 0 0 3 0x14200 syncer update 22539 209036 0 0 3 0x14200 cleaner cleaner 76101 502410 0 0 3 0x14200 reaper reaper 9993 132889 0 0 3 0x14200 pgdaemon pagedaemon 58498 197171 0 0 3 0x14200 bored viomb 57671 457094 0 0 3 0x40014200 acpi0 acpi0 59964 37591 0 0 3 0x40014200 idle1 81139 48003 0 0 3 0x14200 bored softnet1 58958 415168 0 0 3 0x14200 bored softnet0 89222 115997 0 0 3 0x14200 bored systqmp 44870 147057 0 0 3 0x14200 bored systq 35427 143980 0 0 3 0x14200 tmoslp softclockmp 19770 465758 0 0 3 0x40014200 tmoslp softclock 97289 50999 0 0 3 0x40014200 idle0 1 480544 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 207 (syz-executor) thread 0xffff8000fffe0030 (355119) exclusive rrwlock inode r = 0 (0xfffffd806c0b9440) #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:570 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:688 #7 ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsysret+0x192 sys/kern/kern_ktrace.c:209 #8 syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #8 syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839fa6c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsysret+0xde sys/kern/kern_ktrace.c:209 #2 syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #2 syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 #3 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11070 12160K 12426K 166960K 12573 0 pcb 17 12K 12K 166960K 74 0 rtable 224 11K 11K 166960K 450 0 pf 41 19K 23K 166960K 195 0 ifaddr 40 6K 8K 166960K 59 0 ifgroup 53 2K 2K 166960K 77 0 sysctl 4 1K 9K 166960K 41 0 counters 70 37K 37K 166960K 102 0 ioctlops 0 0K 4K 166960K 1697 0 iov 1 4K 16K 166960K 46 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1303 82K 82K 166960K 1674 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 12 0K 0K 166960K 26 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 478 0 sigio 0 0K 0K 166960K 3 0 proc 72 115K 147K 166960K 595 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 23 0 in_multi 88 6K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 21 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 503 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 273 172K 190K 166960K 6466 0 UVM aobj 15 4K 4K 166960K 16 0 pinsyscall 43 86K 105K 166960K 1638 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 32 0 NDP 12 0K 1K 166960K 36 0 temp 50 9084K 9146K 166960K 21888 0 kqueue 15 24K 30K 166960K 129 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 120 184 0 181 3 2 1 3 0 8 0 rtentry 176 121 0 29 6 0 6 6 0 8 0 unpcb 144 235 0 209 2 1 1 2 0 8 0 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 736 116 0 108 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 2 0 2 1 0 1 1 0 8 1 inpcb 328 445 0 433 7 0 7 7 0 8 5 nd6 152 26 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 14 0 13 1 0 1 1 0 8 0 pppxif 1576 2 0 2 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 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 4 0 2 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 13 0 5 1 0 1 1 0 8 0 pfanchor 1288 4 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 43 0 3 1 0 1 1 0 8 0 pfstkey 128 45 0 5 2 0 2 2 0 8 0 pfstate 448 43 0 4 5 0 5 5 0 8 0 pfrule 1360 95 0 54 5 1 4 4 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 256 542 0 127 31 2 29 31 0 8 2 art_table 40 543 0 127 5 0 5 5 0 8 0 art_node 32 121 0 39 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semapl 112 21 0 11 1 0 1 1 0 8 0 shmpl 112 13 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2273 0 808 93 0 93 93 0 8 0 ffsino 296 2273 0 808 114 0 114 114 0 8 0 nchpl 144 2952 0 1245 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 2511 0 0 140 0 140 140 0 8 0 namei 1024 9555 0 9555 1 0 1 1 0 8 1 percpumem 16 66 0 16 1 0 1 1 0 8 0 pfiaddrpl 120 3 0 0 1 0 1 1 0 8 0 kstatmem 264 42 0 16 3 0 3 3 0 8 1 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 15845 0 15845 4 3 1 3 1 8 1 plimitpl 152 204 0 185 1 0 1 1 0 8 0 sigapl 424 815 0 767 9 1 8 8 0 8 2 knotepl 120 550 0 0 17 0 17 17 0 8 0 kqueuepl 224 243 0 230 5 2 3 5 0 8 2 pipepl 344 151 0 124 3 0 3 3 0 8 0 fdescpl 528 779 0 747 3 0 3 3 0 8 0 filepl 160 4113 0 3879 13 1 12 13 0 8 1 lockfpl 104 152 0 145 1 0 1 1 0 8 0 lockfspl 48 73 0 68 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 658 0 644 1 0 1 1 0 8 0 zombiepl 144 768 0 767 1 0 1 1 0 8 0 processpl 1232 815 0 767 6 0 6 6 0 8 2 procpl 664 1423 0 1361 8 0 8 8 0 8 2 sosppl 176 4 0 4 1 1 0 1 0 8 0 sockpl 752 876 0 835 13 3 10 10 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 1173 0 0 74 0 74 74 0 8 0 bufpl 280 8389 0 2135 447 0 447 447 0 8 0 anonpl 32 9200 0 0 75 0 75 75 0 246 0 amapchunkpl 152 20086 0 19488 29 2 27 29 0 158 4 amappl16 200 3233 0 3203 26 11 15 20 0 8 8 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 138 0 126 1 0 1 1 0 8 0 amappl12 168 1027 0 996 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 74 0 60 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 1 0 1 0 8 0 amappl8 136 122 0 120 1 0 1 1 0 8 0 amappl7 128 148 0 134 1 0 1 1 0 8 0 amappl6 120 159 0 158 1 0 1 1 0 8 0 amappl5 112 95 0 85 1 0 1 1 0 8 0 amappl4 104 290 0 269 1 0 1 1 0 8 0 amappl3 96 3765 0 3627 4 0 4 4 0 8 0 amappl2 88 550 0 488 2 0 2 2 0 8 0 amappl1 80 11577 0 10972 18 2 16 16 0 8 2 amappl 88 5682 0 5483 5 0 5 5 0 92 0 uvmvnodes 80 111 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 15 0 1 1 0 1 1 0 8 0 uaddrrnd 24 779 0 747 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 779 0 747 1 0 1 1 0 8 0 vmmpekpl 168 8372 0 8341 2 0 2 2 0 8 0 vmmpepl 168 58163 0 56153 101 0 101 101 0 357 7 vmsppl 488 778 0 747 6 1 5 5 0 8 0 rwobjpl 80 19477 0 18374 29 0 29 29 0 8 2 pdppl 4096 1565 0 1494 103 28 75 85 0 8 4 pvpl 32 16318 0 0 132 0 132 132 0 265 0 pmappl 256 778 0 747 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 347 0 34 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff838ccff0) 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(ffffffff839f9ec0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839f9ec0) 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(ffffffff839f9ec0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839f9ec0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff8000fffe1cb8,5b,0,ffff800039fd4270) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe1cb8,5b,0,ffff800039fd4270) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff800039fd4320) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff800039fd4320) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x750e015bed30, count: 4 ddb{0}> trace x86_ipi_db(ffffffff838ccff0) 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(ffffffff839f9ec0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839f9ec0) 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(ffffffff839f9ec0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839f9ec0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff8000fffe1cb8,5b,0,ffff800039fd4270) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe1cb8,5b,0,ffff800039fd4270) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff800039fd4320) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff800039fd4320) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x750e015bed30, count: -11 ddb{0}> machine ddbcpu 1 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ffs2_balloc(fffffd806c0b93a0,32017,50,fffffd80097fd7b8,1,ffff80003c4254a8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c425530) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806aca7628,ffff80003c4255e0,3,fffffd80097fd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000fffe0030,fffffd806aca7628,fffffd80097fd7b8,ffff80003c4256b0,ffff80003c425690) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80003c425830) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003c425830) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x816b864c280, count: 8 ddb{1}> trace ffs2_balloc(fffffd806c0b93a0,32017,50,fffffd80097fd7b8,1,ffff80003c4254a8) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c425530) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806aca7628,ffff80003c4255e0,3,fffffd80097fd7b8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000fffe0030,fffffd806aca7628,fffffd80097fd7b8,ffff80003c4256b0,ffff80003c425690) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:691 ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff8000fffe0030,36,0,ffff80003c425780) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80003c425830) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003c425830) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x816b864c280, count: -7