uvm_fault(0xffffffff83508d40, 0xffff800026f021f8, 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 188711 38730 0 0 0 0 syz-executor *267996 97569 0 0x1000 0x4080000 1K syz-executor ffs2_balloc(fffffd806bf76330,4100088c000,4000,fffffd807f7d3548,2,ffff800032d8b138) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800032d8b1c0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8062260a40,ffff800032d8b368,7,fffffd807f7d3548) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806c96f448,ffff800032d8b368,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffff6020,7,ffff800032d8b368,0,ffff800032d8b420) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6020,ffff800032d8b4d0,ffff800032d8b420) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800032d8b4d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800032d8b4d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5cb4a17bbc0, 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(0xffffffff83508d40, 0xffff800026f021f8, 0, 1) -> d ddb{1}> trace ffs2_balloc(fffffd806bf76330,4100088c000,4000,fffffd807f7d3548,2,ffff800032d8b138) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800032d8b1c0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8062260a40,ffff800032d8b368,7,fffffd807f7d3548) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806c96f448,ffff800032d8b368,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffff6020,7,ffff800032d8b368,0,ffff800032d8b420) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6020,ffff800032d8b4d0,ffff800032d8b420) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800032d8b4d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800032d8b4d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5cb4a17bbc0, count: -8 ddb{1}> show registers rdi 0 rsi 0x2 rbp 0xffff800032d8b0e0 rbx 0 rdx 0xffff80000119a000 rcx 0xffff800026f02000 rax 0x3f r8 0xffffffffffffffff r9 0xffff800032d8b138 r10 0xd3ae0d0e0d57bf58 r11 0xfd4104c28728f436 r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd80776107d0 rip 0xffffffff827d2fbe ffs2_balloc+0x9fe cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800032d8af70 ss 0x10 ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ddb{1}> show proc PROC (syz-executor) tid=267996 pid=97569 tcnt=2 stat=onproc flags process=1000 proc=4080000 runpri=17, usrpri=85, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000ffff62a8 scnt=1 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff62a8,0xffff800030984cf0 process=0xffff800036da0488 user=0xffff800032d86000, vmspace=0xfffffd806c572540 estcpu=35, cpticks=7, pctcpu=0.15, user=0, sys=21, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 38730 188711 32641 0 7 0 syz-executor 38730 484139 32641 0 3 0x4000080 fsleep syz-executor 9466 293577 87201 0 3 0x1000080 nanoslp syz-executor 9466 317811 87201 0 3 0x5000080 sbwait syz-executor 9466 151762 87201 0 3 0x5000080 fsleep syz-executor 46069 99381 44417 0 3 0x80 nanoslp syz-executor 46069 158839 44417 0 3 0x4000080 netacc syz-executor 46069 20443 44417 0 3 0x4000080 fsleep syz-executor 97569 407822 58256 0 3 0x3000 suspend syz-executor *97569 267996 58256 0 7 0x4081000 syz-executor 32641 132927 21872 0 3 0x82 nanoslp syz-executor 54511 483934 21872 0 3 0x82 nanoslp syz-executor 58256 514524 21872 0 3 0x82 nanoslp syz-executor 87201 402710 21872 0 3 0x82 nanoslp syz-executor 44417 515351 21872 0 3 0x82 nanoslp syz-executor 76222 352408 21872 0 2 0x2 syz-executor 6637 41950 21872 0 3 0x82 nanoslp syz-executor 40336 63274 21872 0 3 0x82 nanoslp syz-executor 70466 123132 0 0 3 0x14200 acct acct 50780 513421 0 0 3 0x14200 bored sosplice 33700 157928 1 0 3 0x100083 ttyin getty 21872 521909 79304 0 3 0x82 kqread syz-executor 79304 154681 68449 0 3 0x10008a sigsusp ksh 68449 323740 88120 0 3 0x98 kqread sshd-session 88120 483731 5171 0 3 0x92 kqread sshd-session 5171 363245 1 0 3 0x88 kqread sshd 31626 507239 57011 74 3 0x1100092 bpf pflogd 57011 420475 1 0 3 0x80 sbwait pflogd 15542 50333 42048 73 2 0x1100010 syslogd 42048 367806 1 0 3 0x100082 sbwait syslogd 99513 225495 1 0 3 0x100080 kqread resolvd 92002 180495 73981 77 3 0x100092 kqread dhcpleased 11399 275894 73981 77 3 0x100092 kqread dhcpleased 73981 388613 1 0 3 0x80 kqread dhcpleased 40411 298452 0 0 3 0x14200 bored smr 22418 249060 0 0 3 0x14200 pgzero zerothread 18410 471206 0 0 3 0x14200 aiodoned aiodoned 8694 124183 0 0 3 0x14200 syncer update 10344 165297 0 0 3 0x14200 cleaner cleaner 15129 29940 0 0 3 0x14200 reaper reaper 60618 33726 0 0 3 0x14200 pgdaemon pagedaemon 56731 499244 0 0 3 0x14200 bored viomb 74488 92372 0 0 3 0x40014200 acpi0 acpi0 91907 191534 0 0 3 0x40014200 idle1 93 513469 0 0 3 0x14200 bored softnet3 19819 419650 0 0 3 0x14200 bored softnet2 93582 77878 0 0 3 0x14200 bored softnet1 53426 191538 0 0 3 0x14200 bored softnet0 58964 177185 0 0 3 0x14200 bored systqmp 41524 247428 0 0 3 0x14200 bored systq 86640 175398 0 0 3 0x14200 tmoslp softclockmp 18564 502569 0 0 3 0x40014200 tmoslp softclock 5958 478195 0 0 3 0x40014200 idle0 1 30697 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 97569 (syz-executor) thread 0xffff8000ffff6020 (267996) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83507c70) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 biowait+0xc1 sys/kern/vfs_bio.c:1254 #5 bwrite+0x2e2 sys/kern/vfs_bio.c:766 #6 ffs_write+0x830 #7 VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 #8 vn_write+0x1d1 sys/kern/vfs_vnops.c:408 #9 dofilewritev+0x23c sys/kern/sys_generic.c:380 #10 sys_write+0xa2 sys/kern/sys_generic.c:300 #11 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #11 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bf763c8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 76222 (syz-executor) thread 0xffff800036b92a50 (352408) exclusive rrwlock inode r = 0 (0xfffffd806bf766f8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x192 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #13 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #13 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80775af4e8) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1852 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 15542 (syslogd) thread 0xffff8000ffffdbe8 (50333) exclusive rrwlock inode r = 0 (0xfffffd806e4c80a0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2926 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 10230K 10553K 166960K 12158 0 pcb 18 15K 16K 166960K 266 0 rtable 249 8K 8K 166960K 960 0 pf 41 19K 25K 166960K 131 0 ifaddr 45 8K 8K 166960K 130 0 ifgroup 63 2K 2K 166960K 166 0 sysctl 3 0K 0K 166960K 3 0 counters 66 36K 37K 166960K 122 0 ioctlops 0 0K 4K 166960K 1572 0 iov 0 0K 18K 166960K 79 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 91K 91K 166960K 2224 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 34 0 dirhash 12 2K 2K 166960K 48 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 1077 0 sigio 0 0K 0K 166960K 17 0 proc 72 91K 140K 166960K 1031 0 subproc 104 6K 6K 166960K 299 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 92 0 in_multi 103 7K 7K 166960K 316 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 678 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 242 73K 77K 166960K 10791 0 UVM aobj 14 4K 4K 166960K 15 0 pinsyscall 42 84K 104K 166960K 2585 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 29 0 NDP 13 0K 2K 166960K 92 0 temp 69 6822K 6893K 166960K 43137 0 kqueue 16 22K 28K 166960K 176 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 120 176 0 172 3 1 2 2 0 8 1 rtentry 112 302 0 189 4 0 4 4 0 8 0 unpcb 144 705 0 681 9 4 5 5 0 8 3 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpcb 808 286 0 278 9 7 2 8 0 8 1 arp 120 49 0 31 1 0 1 1 0 8 0 inpcb 336 1084 0 1068 10 8 2 7 0 8 0 nd6 136 79 0 51 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 23 0 15 1 0 1 1 0 8 0 ppxss 1168 6 0 6 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 89 0 36 1 0 1 1 0 8 0 pfstkey 128 91 0 38 3 0 3 3 0 8 0 pfstate 376 90 0 37 7 0 7 7 0 8 0 pfrule 1344 39 0 29 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1232 0 749 32 1 31 31 0 8 0 art_table 32 1233 0 749 4 0 4 4 0 8 0 art_node 16 300 0 198 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 41 0 24 3 0 3 3 0 8 0 dino2pl 256 2963 0 1435 96 0 96 96 0 8 0 ffsino 272 2963 0 1435 103 0 103 103 0 8 0 nchpl 144 4209 0 3659 64 31 33 64 0 8 8 uvmvnodes 80 3661 0 0 75 0 75 75 0 8 0 vnodes 216 3661 0 0 204 0 204 204 0 8 0 namei 1024 16059 0 16059 1 0 1 1 0 8 1 percpumem 16 75 0 28 1 0 1 1 0 8 0 kstatmem 264 82 0 56 3 0 3 3 0 8 1 scsiplug 72 8 0 8 2 1 1 1 0 8 1 scxspl 216 21166 0 21166 12 10 2 8 1 8 2 plimitpl 152 222 0 203 1 0 1 1 0 8 0 sigapl 424 1380 0 1329 9 2 7 8 0 8 0 futexpl 64 11692 0 11689 3 2 1 1 0 8 0 knotepl 120 562 0 0 18 0 18 18 0 8 0 kqueuepl 216 453 0 442 9 4 5 5 0 8 4 pipepl 320 338 0 311 8 5 3 8 0 8 0 fdescpl 496 1340 0 1309 6 1 5 5 0 8 0 filepl 152 8283 0 8006 27 8 19 20 0 8 8 lockfpl 104 379 0 375 2 0 2 2 0 8 1 lockfspl 48 141 0 137 1 0 1 1 0 8 0 sessionpl 144 41 0 32 1 0 1 1 0 8 0 pgrppl 48 72 0 55 1 0 1 1 0 8 0 ucredpl 104 1270 0 1257 1 0 1 1 0 8 0 zombiepl 144 1333 0 1329 1 0 1 1 0 8 0 processpl 1160 1380 0 1329 6 1 5 6 0 8 0 procpl 648 2617 0 2560 9 3 6 8 0 8 0 sosppl 168 11 0 11 2 1 1 1 0 8 1 sockpl 664 1975 0 1930 22 10 12 13 0 8 7 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 233 0 0 30 0 30 30 0 8 0 mtagpl 96 74 0 0 2 0 2 2 0 8 0 mbufpl 256 326 0 0 20 0 20 20 0 8 0 bufpl 280 8491 0 2163 453 0 453 453 0 8 0 anonpl 24 234973 0 227544 80 12 68 76 0 185 22 amapchunkpl 152 34533 0 33967 35 1 34 35 0 158 8 amappl16 200 5586 0 5396 44 23 21 21 0 8 10 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 192 0 180 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2274 0 2243 4 2 2 3 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 23 0 22 1 0 1 1 0 8 0 amappl9 144 131 0 131 1 1 0 1 0 8 0 amappl8 136 24 0 20 1 0 1 1 0 8 0 amappl7 128 142 0 130 1 0 1 1 0 8 0 amappl6 120 353 0 351 1 0 1 1 0 8 0 amappl5 112 200 0 187 1 0 1 1 0 8 0 amappl4 104 371 0 351 1 0 1 1 0 8 0 amappl3 96 7135 0 7024 4 0 4 4 0 8 0 amappl2 88 923 0 855 2 0 2 2 0 8 0 amappl1 80 12143 0 11582 16 2 14 15 0 8 0 amappl 88 10213 0 10034 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1340 0 1309 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1340 0 1309 1 0 1 1 0 8 0 vmmpekpl 168 12201 0 12152 3 0 3 3 0 8 0 vmmpepl 168 89354 0 87321 110 10 100 100 0 357 9 vmsppl 440 1339 0 1309 6 2 4 5 0 8 0 rwobjpl 56 31169 0 26397 72 2 70 70 0 8 2 pdppl 4096 2687 0 2618 121 50 71 85 0 8 2 pvpl 32 32776 0 0 266 1 265 265 0 265 0 pmappl 248 1339 0 1309 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 442 0 74 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834aaff0) 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(ffffffff83507a68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83507a68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0e2750,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83507a68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83507a68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7bbf7c114200, count: 6 ddb{0}> trace x86_ipi_db(ffffffff834aaff0) 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(ffffffff83507a68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83507a68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 intr_handler(ffff80002a0e2750,ffff800000079f80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:553 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff83507a68) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83507a68) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7bbf7c114200, count: -9 ddb{0}> machine ddbcpu 1 Stopped at ffs2_balloc+0x9fe: movq 0(%rcx,%rax,8),%r14 ffs2_balloc(fffffd806bf76330,4100088c000,4000,fffffd807f7d3548,2,ffff800032d8b138) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800032d8b1c0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8062260a40,ffff800032d8b368,7,fffffd807f7d3548) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806c96f448,ffff800032d8b368,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffff6020,7,ffff800032d8b368,0,ffff800032d8b420) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6020,ffff800032d8b4d0,ffff800032d8b420) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800032d8b4d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800032d8b4d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5cb4a17bbc0, count: 7 ddb{1}> trace ffs2_balloc(fffffd806bf76330,4100088c000,4000,fffffd807f7d3548,2,ffff800032d8b138) at ffs2_balloc+0x9fe sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800032d8b1c0) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8062260a40,ffff800032d8b368,7,fffffd807f7d3548) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806c96f448,ffff800032d8b368,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffff6020,7,ffff800032d8b368,0,ffff800032d8b420) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff8000ffff6020,ffff800032d8b4d0,ffff800032d8b420) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800032d8b4d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800032d8b4d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5cb4a17bbc0, count: -8