uvm_fault(0xffffffff83a12a48, 0xffff8000287f2f10, 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 199829 76838 0 0 0 0 syz-executor *326142 74015 0 0x1000 0x4080000 1K syz-executor ffs2_balloc(fffffd8069762bb8,7b8000,4000,fffffd80097fd138,2,ffff80003c410058) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c4100e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805976b008,ffff80003c410298,7,fffffd80097fd138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8058f60a78,ffff80003c410298,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000fffd74f8,3,ffff80003c410298,0,ffff80003c410350) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff8000fffd74f8,ffff80003c410400,ffff80003c410350) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c410400) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c410400) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab6867e2000, 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(0xffffffff83a12a48, 0xffff8000287f2f10, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd8069762bb8,7b8000,4000,fffffd80097fd138,2,ffff80003c410058) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c4100e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805976b008,ffff80003c410298,7,fffffd80097fd138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8058f60a78,ffff80003c410298,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000fffd74f8,3,ffff80003c410298,0,ffff80003c410350) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff8000fffd74f8,ffff80003c410400,ffff80003c410350) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c410400) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c410400) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab6867e2000, count: -8 ddb{1}> show registers rdi 0 rsi 0x2 rbp 0xffff80003c410000 rbx 0 rdx 0 rcx 0xffff8000287f2000 rax 0x1e2 r8 0xffffffffffffffff r9 0xffff80003c410058 r10 0x4e1319d67d478d9f r11 0x89b2dcd6cc84c622 r12 0x1 r13 0xffff800000c31800 r14 0xffff80003c40fe90 r15 0xfffffd805f203360 rip 0xffffffff8209720d ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c40fe80 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (syz-executor) tid=326142 pid=74015 tcnt=3 stat=onproc flags process=1000 proc=4080000 runpri=17, usrpri=75, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffd6a98 scnt=2 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffd6a98,0xffff80002a2407f8 process=0xffff8000fffdb518 user=0xffff80003c40b000, vmspace=0xfffffd8069d85020 estcpu=25, cpticks=20, pctcpu=0.16, user=0, sys=20, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76838 199829 18302 0 7 0 syz-executor 76838 350562 18302 0 2 0x4000000 syz-executor 59577 224837 65075 0 2 0 syz-executor 59577 170537 65075 0 3 0x4000080 fifor syz-executor 41470 138578 34428 -1 2 0x10 syz-executor 41470 159577 34428 -1 2 0x4000010 syz-executor 91493 234302 62684 0 2 0 syz-executor 85847 348766 91408 0 2 0 syz-executor 85847 106961 91408 0 3 0x4000080 fsleep syz-executor 94435 156150 11973 0 2 0 syz-executor 12670 212811 70593 0 2 0 syz-executor 12670 150838 70593 0 2 0x4000000 syz-executor 74015 74818 97882 0 3 0x3000 suspend syz-executor *74015 326142 97882 0 7 0x4081000 syz-executor 74015 373540 97882 0 3 0x4081000 inode syz-executor 70593 445378 27436 0 3 0x82 nanoslp syz-executor 96283 45416 0 0 3 0x14200 acct acct 15375 445691 0 0 3 0x14280 nfsidl nfsio 57921 86980 0 0 3 0x14280 nfsidl nfsio 47975 335428 0 0 3 0x14280 nfsidl nfsio 11186 290145 0 0 3 0x14280 nfsidl nfsio 89628 501168 0 0 3 0x14280 nfsidl nfsio 72837 124889 0 0 3 0x14280 nfsidl nfsio 79547 521263 0 0 3 0x14280 nfsidl nfsio 43162 46118 0 0 3 0x14280 nfsidl nfsio 24391 201017 0 0 3 0x14280 nfsidl nfsio 59121 162989 0 0 3 0x14280 nfsidl nfsio 13151 44804 0 0 3 0x14280 nfsidl nfsio 63000 237954 0 0 3 0x14280 nfsidl nfsio 59853 455737 0 0 3 0x14280 nfsidl nfsio 71724 130404 0 0 3 0x14280 nfsidl nfsio 16608 36369 0 0 3 0x14280 nfsidl nfsio 95865 399769 0 0 3 0x14280 nfsidl nfsio 65242 521004 0 0 3 0x14280 nfsidl nfsio 54332 167936 0 0 3 0x14280 nfsidl nfsio 54836 421403 0 0 3 0x14280 nfsidl nfsio 4255 191766 0 0 3 0x14280 nfsidl nfsio 90251 510665 1 0 3 0x100083 ttyin getty 34428 358201 27436 0 3 0x82 nanoslp syz-executor 97882 132698 27436 0 3 0x82 nanoslp syz-executor 62684 450513 27436 0 3 0x82 nanoslp syz-executor 18302 374886 27436 0 3 0x82 nanoslp syz-executor 91408 72752 27436 0 3 0x82 nanoslp syz-executor 11973 21326 27436 0 3 0x82 nanoslp syz-executor 65075 80492 27436 0 3 0x82 nanoslp syz-executor 27436 72034 63336 0 3 0x82 kqread syz-executor 63336 477290 79777 0 3 0x10008a sigsusp ksh 79777 283680 28897 0 3 0x98 kqread sshd-session 28897 470706 31079 0 3 0x92 kqread sshd-session 31079 260534 1 0 3 0x88 kqread sshd 46648 266222 19036 74 3 0x1100092 bpf pflogd 19036 458996 1 0 3 0x80 sbwait pflogd 74806 314989 50940 73 3 0x1100090 kqread syslogd 50940 211393 1 0 3 0x100082 sbwait syslogd 16481 245491 1 0 3 0x100080 kqread resolvd 36265 147551 37585 77 3 0x100092 kqread dhcpleased 70898 504143 37585 77 3 0x100092 kqread dhcpleased 37585 85374 1 0 3 0x80 kqread dhcpleased 61166 270837 0 0 3 0x14200 pause smr 85974 502934 0 0 2 0x14200 zerothread 12783 310769 0 0 3 0x14200 aiodoned aiodoned 85596 8378 0 0 3 0x14200 syncer update 48614 143928 0 0 3 0x14200 cleaner cleaner 62087 489365 0 0 3 0x14200 reaper reaper 92525 119395 0 0 3 0x14200 pgdaemon pagedaemon 88801 400158 0 0 3 0x14200 bored viomb 67951 486862 0 0 3 0x40014200 acpi0 acpi0 71648 13760 0 0 3 0x40014200 idle1 46407 226831 0 0 3 0x14200 bored softnet1 68560 466552 0 0 3 0x14200 bored softnet0 23303 460819 0 0 3 0x14200 smrbar systqmp 8274 134112 0 0 3 0x14200 bored systq 7422 229448 0 0 3 0x14200 tmoslp softclockmp 39712 353129 0 0 3 0x40014200 tmoslp softclock 6365 17023 0 0 3 0x40014200 idle0 1 341026 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74015 (syz-executor) thread 0xffff8000fffd74f8 (326142) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a32f00) #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:1242 #4 bwrite+0x2e7 sys/kern/vfs_bio.c:754 #5 ffs2_balloc+0x18b4 sys/ufs/ffs/ffs_balloc.c:701 #6 ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 #7 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 #8 vn_write+0x1d3 sys/kern/vfs_vnops.c:408 #9 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #10 sys_write+0xa2 sys/kern/sys_generic.c:300 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8069762c58) #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 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 74015 (syz-executor) thread 0xffff80002a2407e8 (373540) exclusive rrwlock inode r = 0 (0xfffffd806e8a8120) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #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 Process 23303 (systqmp) thread 0xffff8000ffffe7c8 (460819) shared rwlock systqmp r = 0 (0xffffffff83953178) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11066 12155K 12419K 166960K 12435 0 pcb 17 12K 12K 166960K 66 0 rtable 222 8K 8K 166960K 432 0 pf 36 18K 24K 166960K 96 0 ifaddr 42 7K 7K 166960K 64 0 ifgroup 55 2K 2K 166960K 87 0 sysctl 3 1K 9K 166960K 9 0 counters 70 37K 38K 166960K 112 0 ioctlops 0 0K 4K 166960K 1630 0 iov 0 0K 16K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1353 85K 85K 166960K 1804 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 405 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 180K 166960K 598 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 27 0 in_multi 95 7K 7K 166960K 127 0 ether_multi 1 0K 0K 166960K 7 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 454 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 226 160K 182K 166960K 5503 0 UVM aobj 10 4K 4K 166960K 11 0 pinsyscall 43 86K 104K 166960K 1612 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 21 0 NDP 12 0K 2K 166960K 42 0 temp 77 9088K 9154K 166960K 14952 0 kqueue 15 24K 28K 166960K 76 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 51 0 48 1 0 1 1 0 8 0 rtentry 176 132 0 36 6 0 6 6 0 8 0 unpcb 144 233 0 213 4 1 3 3 0 8 2 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 89 0 83 3 1 2 2 0 8 1 arp 136 22 0 4 1 0 1 1 0 8 0 inpcb 328 431 0 422 12 5 7 7 0 8 5 nd6 152 28 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 18 0 18 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pffrag 232 5 0 4 1 0 1 1 0 482 0 pffrnode 88 5 0 4 1 0 1 1 0 8 0 pffrent 40 9 0 8 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 5 0 0 1 0 1 1 0 8 0 pfstitem 24 45 0 0 1 0 1 1 0 8 0 pfstkey 128 45 0 0 2 0 2 2 0 8 0 pfstate 448 43 0 0 5 0 5 5 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 542 0 123 31 3 28 31 0 8 0 art_table 40 543 0 123 5 0 5 5 0 8 0 art_node 32 131 0 46 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 3 1 0 1 1 0 8 0 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2175 0 710 93 0 93 93 0 8 0 ffsino 296 2175 0 710 114 0 114 114 0 8 0 nchpl 144 2703 0 996 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 2500 0 0 139 0 139 139 0 8 0 namei 1024 8936 0 8935 2 1 1 2 0 8 0 percpumem 16 71 0 21 1 0 1 1 0 8 0 kstatmem 264 50 0 24 3 0 3 3 0 8 1 scxspl 216 16209 0 16209 11 3 8 8 1 8 8 plimitpl 152 108 0 90 1 0 1 1 0 8 0 sigapl 424 745 0 676 8 0 8 8 0 8 0 knotepl 120 306 0 0 10 0 10 10 0 8 0 kqueuepl 224 108 0 97 1 0 1 1 0 8 0 pipepl 344 145 0 118 3 0 3 3 0 8 0 fdescpl 528 708 0 676 3 0 3 3 0 8 0 filepl 160 3934 0 3721 17 4 13 15 0 8 1 lockfpl 104 110 0 108 1 0 1 1 0 8 0 lockfspl 48 51 0 49 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 47 0 30 1 0 1 1 0 8 0 ucredpl 104 659 0 645 1 0 1 1 0 8 0 zombiepl 144 677 0 676 1 0 1 1 0 8 0 processpl 1232 745 0 676 6 0 6 6 0 8 0 procpl 664 1209 0 1133 8 0 8 8 0 8 0 sosppl 176 2 0 2 1 1 0 1 0 8 0 sockpl 752 722 0 690 17 6 11 11 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 147 0 0 10 0 10 10 0 8 0 bufpl 280 6597 0 467 438 0 438 438 0 8 0 anonpl 32 13877 0 0 112 0 112 112 0 246 0 amapchunkpl 152 17256 0 16673 34 4 30 33 0 158 7 amappl16 200 2744 0 2595 33 25 8 30 0 8 0 amappl15 192 46 0 46 1 1 0 1 0 8 0 amappl14 184 435 0 434 1 0 1 1 0 8 0 amappl13 176 133 0 121 1 0 1 1 0 8 0 amappl12 168 967 0 938 2 0 2 2 0 8 0 amappl11 160 21 0 21 1 1 0 1 0 8 0 amappl10 152 80 0 66 1 0 1 1 0 8 0 amappl9 144 278 0 277 2 1 1 1 0 8 0 amappl8 136 108 0 106 1 0 1 1 0 8 0 amappl7 128 156 0 143 1 0 1 1 0 8 0 amappl6 120 163 0 161 1 0 1 1 0 8 0 amappl5 112 102 0 91 1 0 1 1 0 8 0 amappl4 104 310 0 291 1 0 1 1 0 8 0 amappl3 96 3236 0 3130 4 0 4 4 0 8 0 amappl2 88 594 0 532 2 0 2 2 0 8 0 amappl1 80 12429 0 11827 18 2 16 16 0 8 2 amappl 88 4674 0 4520 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 1 0 1 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 7 0 7 2 2 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 708 0 676 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 708 0 676 1 0 1 1 0 8 0 vmmpekpl 168 8239 0 8193 3 0 3 3 0 8 0 vmmpepl 168 55905 0 53852 111 9 102 111 0 357 8 vmsppl 488 707 0 676 5 0 5 5 0 8 0 rwobjpl 80 19276 0 18118 33 4 29 33 0 8 0 pdppl 4096 1423 0 1352 113 40 73 87 0 8 2 pvpl 32 23089 0 0 187 0 187 187 0 265 0 pmappl 256 707 0 676 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 51 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83920ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc 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 end of kernel end trace frame: 0x783512a10640, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83920ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc 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 end of kernel end trace frame: 0x783512a10640, count: -7 ddb{0}> machine ddbcpu 1 Stopped at ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ffs2_balloc(fffffd8069762bb8,7b8000,4000,fffffd80097fd138,2,ffff80003c410058) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c4100e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805976b008,ffff80003c410298,7,fffffd80097fd138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8058f60a78,ffff80003c410298,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000fffd74f8,3,ffff80003c410298,0,ffff80003c410350) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff8000fffd74f8,ffff80003c410400,ffff80003c410350) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c410400) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c410400) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab6867e2000, count: 7 ddb{1}> trace ffs2_balloc(fffffd8069762bb8,7b8000,4000,fffffd80097fd138,2,ffff80003c410058) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003c4100e0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805976b008,ffff80003c410298,7,fffffd80097fd138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8058f60a78,ffff80003c410298,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000fffd74f8,3,ffff80003c410298,0,ffff80003c410350) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff8000fffd74f8,ffff80003c410400,ffff80003c410350) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80003c410400) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c410400) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab6867e2000, count: -8