uvm_fault(0xffffffff83a38fe0, 0xffff800023553c30, 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 *110280 57546 0 0x1000 0x4080000 0K syz-executor 171094 48573 0 0x2 0x1 1 syz-executor ffs2_balloc(fffffd806b461840,e48000,4000,fffffd80097fd340,2,ffff800036ba7b88) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800036ba7c10) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806d7ef960,ffff800036ba7dc8,7,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8069b7b240,ffff800036ba7dc8,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80003abc3a18,3,ffff800036ba7dc8,0,ffff800036ba7e80) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff80003abc3a18,ffff800036ba7f30,ffff800036ba7e80) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800036ba7f30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036ba7f30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8cb7467d280, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff83a38fe0, 0xffff800023553c30, 0, 1) -> d ddb{0}> trace ffs2_balloc(fffffd806b461840,e48000,4000,fffffd80097fd340,2,ffff800036ba7b88) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800036ba7c10) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806d7ef960,ffff800036ba7dc8,7,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8069b7b240,ffff800036ba7dc8,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80003abc3a18,3,ffff800036ba7dc8,0,ffff800036ba7e80) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff80003abc3a18,ffff800036ba7f30,ffff800036ba7e80) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800036ba7f30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036ba7f30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8cb7467d280, count: -8 ddb{0}> show registers rdi 0 rsi 0x2 rbp 0xffff800036ba7b30 rbx 0 rdx 0xffff8000015f6a80 rcx 0xffff800023552000 rax 0x386 r8 0xffffffffffffffff r9 0xffff800036ba7b88 r10 0xac00f81334d60e59 r11 0xe39eb56945f4e370 r12 0x1 r13 0xffff800000c31800 r14 0xffff800036ba79c0 r15 0xfffffd8063ccf7e8 rip 0xffffffff81136cdd ffs2_balloc+0xa0d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800036ba79b0 ss 0x10 ffs2_balloc+0xa0d: movq 0(%rcx,%rax,8),%r14 ddb{0}> show proc PROC (syz-executor) tid=110280 pid=57546 tcnt=8 stat=onproc flags process=1000 proc=4080000 runpri=17, usrpri=74, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003abc3780 scnt=7 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003abc3780,0xffff8000fffee028 process=0xffff80002a38ce88 user=0xffff800036ba2000, vmspace=0xfffffd806c7015d0 estcpu=24, cpticks=28, pctcpu=0.11, user=0, sys=27, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9667 523019 48573 0 2 0 syz-executor 9667 381202 48573 0 3 0x4000080 fsleep syz-executor 76385 163798 78928 0 2 0xc80 syz-executor 76385 59302 78928 0 3 0x4000080 msgwait syz-executor 76385 183608 78928 0 3 0x4000080 fsleep syz-executor 76385 455985 78928 0 3 0x4000080 fsleep syz-executor 39467 522981 22522 0 2 0xc80 syz-executor 39467 276615 22522 0 3 0x4000080 fsleep syz-executor 39467 326542 22522 0 3 0x4000080 fsleep syz-executor 39467 143721 22522 0 3 0x4000080 sbwait syz-executor 24609 461841 43271 0 2 0xc80 syz-executor 24609 396430 43271 0 3 0x4000080 fifor syz-executor 24609 371981 43271 0 3 0x4000080 fsleep syz-executor 30685 361287 18540 0 2 0xc80 syz-executor 30685 439526 18540 0 3 0x4000080 kqread syz-executor 79993 387265 43361 -1 4 0x82010 syz-executor 79993 300344 43361 -1 4 0x4082010 syz-executor 79993 201018 43361 -1 2 0x4002010 syz-executor 79993 118269 43361 -1 4 0x4082010 syz-executor 57546 9076 62222 0 3 0x3000 suspend syz-executor *57546 110280 62222 0 7 0x4081000 syz-executor 57546 141122 62222 0 3 0x4081000 inode syz-executor 57546 319404 62222 0 3 0x4081000 inode syz-executor 57546 349163 62222 0 3 0x4081000 inode syz-executor 57546 217619 62222 0 3 0x4081000 inode syz-executor 57546 115018 62222 0 3 0x4081000 inode syz-executor 57546 226207 62222 0 3 0x4081000 inode syz-executor 79045 355524 0 0 3 0x14200 acct acct 45581 102368 67766 0 3 0x100082 sbwait arp 67766 26353 82145 0 3 0x10008a sigsusp sh 78928 483679 87487 0 2 0xc82 syz-executor 62222 77588 87487 0 2 0xc82 syz-executor 18540 272424 87487 0 2 0xc82 syz-executor 43271 524231 87487 0 2 0xc82 syz-executor 43361 430221 87487 0 2 0xc82 syz-executor 22522 156753 87487 0 2 0xc82 syz-executor 48573 171094 87487 0 7 0x3 syz-executor 82145 333931 87487 0 3 0x82 wait syz-executor 87487 5312 6410 0 3 0x82 kqread syz-executor 6410 436876 27622 0 3 0x10008a sigsusp ksh 27622 258700 63420 0 3 0x98 kqread sshd-session 63420 464010 59495 0 3 0x92 kqread sshd-session 21739 239058 1 0 3 0x100083 ttyopn getty 59495 22023 1 0 3 0x88 kqread sshd 87075 348632 95091 74 3 0x1100092 bpf pflogd 95091 159340 1 0 3 0x80 sbwait pflogd 86460 422856 69185 73 3 0x1100090 kqread syslogd 69185 248164 1 0 3 0x100082 sbwait syslogd 91370 263445 1 0 3 0x100080 kqread resolvd 82571 16122 43394 77 3 0x100092 kqread dhcpleased 13573 358493 43394 77 3 0x100092 kqread dhcpleased 43394 324253 1 0 3 0x80 kqread dhcpleased 9703 48036 0 0 3 0x14200 bored smr 63347 312199 0 0 3 0x14200 pgzero zerothread 37200 457487 0 0 3 0x14200 aiodoned aiodoned 59224 322189 0 0 3 0x14200 syncer update 23771 294286 0 0 3 0x14200 cleaner cleaner 68877 269825 0 0 3 0x14200 reaper reaper 68545 465895 0 0 3 0x14200 pgdaemon pagedaemon 96066 472324 0 0 3 0x14200 bored viomb 82327 489369 0 0 3 0x40014200 acpi0 acpi0 83503 497159 0 0 3 0x40014200 idle1 3547 151510 0 0 3 0x14200 bored softnet1 99840 391975 0 0 3 0x14200 bored softnet0 45552 156717 0 0 3 0x14200 bored systqmp 46975 37210 0 0 3 0x14200 bored systq 94291 245203 0 0 3 0x14200 tmoslp softclockmp 7858 430058 0 0 3 0x40014200 tmoslp softclock 91298 391740 0 0 3 0x40014200 idle0 1 220212 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 57546 (syz-executor) thread 0xffff80003abc3a18 (110280) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d31c0) #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:414 #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 (0xfffffd806b4618e0) #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 vn_write+0x18f sys/kern/vfs_vnops.c:411 #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 57546 (syz-executor) thread 0xffff8000fffee018 (141122) exclusive rrwlock inode r = 0 (0xfffffd806b461ea8) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 sys_chdir+0x88 change_dir sys/kern/vfs_syscalls.c:837 [inline] #7 sys_chdir+0x88 sys/kern/vfs_syscalls.c:783 #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 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11066 12159K 12382K 166960K 12465 0 pcb 19 12K 12K 166960K 43 0 rtable 237 8K 8K 166960K 378 0 pf 34 17K 22K 166960K 75 0 ifaddr 41 7K 7K 166960K 51 0 ifgroup 55 2K 2K 166960K 76 0 sysctl 4 1K 9K 166960K 8 0 counters 70 37K 37K 166960K 86 0 ioctlops 0 0K 4K 166960K 1509 0 iov 0 0K 12K 166960K 3 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1304 82K 82K 166960K 1549 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 15 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 93K 166960K 283 0 sigio 1 0K 0K 166960K 3 0 proc 75 131K 180K 166960K 562 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 13 0 in_multi 89 6K 6K 166960K 95 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 7 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 385 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 263 184K 186K 166960K 4463 0 UVM aobj 8 4K 4K 166960K 10 0 pinsyscall 45 90K 105K 166960K 1421 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 12 0K 1K 166960K 31 0 temp 47 9075K 9142K 166960K 10379 0 kqueue 15 24K 28K 166960K 53 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 48 0 44 1 0 1 1 0 8 0 rtentry 176 110 0 5 5 0 5 5 0 8 0 unpcb 144 210 0 189 6 0 6 6 0 8 5 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 45 0 41 1 0 1 1 0 8 0 arp 136 20 0 1 1 0 1 1 0 8 0 inpcb 328 169 0 160 2 0 2 2 0 8 1 nd6 152 22 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 4 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 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 3 0 3 1 0 1 1 0 8 1 pfanchor 1288 2 0 2 1 0 1 1 0 8 1 pftag 88 1 0 1 1 0 1 1 0 8 1 pfstitem 24 25 0 0 1 0 1 1 0 8 0 pfstkey 128 25 0 0 1 0 1 1 0 8 0 pfstate 448 25 0 0 3 0 3 3 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 256 437 0 8 27 0 27 27 0 8 0 art_table 40 438 0 8 5 0 5 5 0 8 0 art_node 32 110 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 7 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1918 0 443 93 0 93 93 0 8 0 ffsino 296 1918 0 443 114 0 114 114 0 8 0 nchpl 144 2317 0 609 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2081 0 0 116 0 116 116 0 8 0 namei 1024 7269 0 7262 2 0 2 2 0 8 1 percpumem 16 58 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 0 1 1 0 8 1 kstatmem 264 37 0 10 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 15001 0 15001 4 2 2 3 1 8 2 plimitpl 152 45 0 23 1 0 1 1 0 8 0 sigapl 424 598 0 548 7 0 7 7 0 8 1 knotepl 120 307 0 0 10 0 10 10 0 8 0 kqueuepl 224 60 0 48 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 581 0 548 3 0 3 3 0 8 0 filepl 160 2826 0 2592 16 0 16 16 0 8 5 lockfpl 104 67 0 64 1 0 1 1 0 8 0 lockfspl 48 32 0 29 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 426 0 412 1 0 1 1 0 8 0 zombiepl 144 548 0 548 1 0 1 1 0 8 1 processpl 1232 598 0 548 5 0 5 5 0 8 0 procpl 664 878 0 808 7 0 7 7 0 8 1 sockpl 752 432 0 397 17 6 11 17 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 26 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 236 0 0 15 0 15 15 0 8 0 bufpl 280 6467 0 338 438 0 438 438 0 8 0 anonpl 32 10710 0 0 87 0 87 87 0 246 0 amapchunkpl 152 13279 0 12526 30 0 30 30 0 158 0 amappl16 200 2606 0 2197 30 8 22 22 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 430 0 427 1 0 1 1 0 8 0 amappl13 176 121 0 108 1 0 1 1 0 8 0 amappl12 168 827 0 795 2 0 2 2 0 8 0 amappl11 160 9 0 9 2 2 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 265 0 265 1 1 0 1 0 8 0 amappl8 136 105 0 103 1 0 1 1 0 8 0 amappl7 128 150 0 135 1 0 1 1 0 8 0 amappl6 120 160 0 157 1 0 1 1 0 8 0 amappl5 112 98 0 86 1 0 1 1 0 8 0 amappl4 104 283 0 262 1 0 1 1 0 8 0 amappl3 96 2451 0 2329 4 0 4 4 0 8 0 amappl2 88 522 0 461 2 0 2 2 0 8 0 amappl1 80 10302 0 9669 17 0 17 17 0 8 2 amappl 88 3723 0 3538 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 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 1 1 1 0 8 1 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 9 0 2 1 0 1 1 0 8 0 uaddrrnd 24 581 0 548 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 581 0 548 1 0 1 1 0 8 0 vmmpekpl 168 6648 0 6615 2 0 2 2 0 8 0 vmmpepl 168 45600 0 43185 109 0 109 109 0 357 4 vmsppl 488 580 0 548 5 0 5 5 0 8 0 rwobjpl 80 16374 0 14875 31 0 31 31 0 8 0 pdppl 4096 1169 0 1096 101 24 77 85 0 8 4 pvpl 32 19505 0 0 159 1 158 158 0 265 0 pmappl 256 580 0 548 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 27 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs2_balloc(fffffd806b461840,e48000,4000,fffffd80097fd340,2,ffff800036ba7b88) at ffs2_balloc+0xa0d sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff800036ba7c10) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806d7ef960,ffff800036ba7dc8,7,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd8069b7b240,ffff800036ba7dc8,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80003abc3a18,3,ffff800036ba7dc8,0,ffff800036ba7e80) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff80003abc3a18,ffff800036ba7f30,ffff800036ba7e80) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800036ba7f30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800036ba7f30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8cb7467d280, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299adff0) 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(ffffffff839d29c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d29c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a232a70,5b,0,ffff80002a2d6d60) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a232a70,5b,0,ffff80002a2d6d60) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a2d6e10) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2d6e10) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794b76036900, count: 8 ddb{1}> trace x86_ipi_db(ffff8000299adff0) 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(ffffffff839d29c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d29c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a232a70,5b,0,ffff80002a2d6d60) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a232a70,5b,0,ffff80002a2d6d60) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a2d6e10) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2d6e10) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x794b76036900, count: -7