uvm_fault(0xffffffff83504770, 0xffff800016172004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs_alloccg+0x187: movl 0x4(%r12),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND *144350 31811 0 0x2 0x1 0K syz-executor 249134 55104 0 0x14000 0x200 1 reaper ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 sys/ufs/ffs/ffs_alloc.c:948 ffs_alloc(fffffd8060adabb0,7,78a78,800,fffffd807f7d3208,ffff80002a1065a8) at ffs_alloc+0x31a sys/ufs/ffs/ffs_alloc.c:140 ffs2_balloc(fffffd8060adabb0,1c000,63,fffffd807f7d3208,1,ffff80002a1066b8) at ffs2_balloc+0x7cd sys/ufs/ffs/ffs_balloc.c:533 ffs_write(ffff80002a106740) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8069d2c960,ffff80002a1067f8,3,fffffd807f7d3208) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff5978,fffffd8069d2c960,fffffd807f7d3208,ffff80002a1068c0,ffff80002a1068a0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrsyscall(ffff8000ffff5978,b,20,ffff80002a106a50) at ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 syscall(ffff80002a106a50) at syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80002a106a50) at syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f5b3e6e1d0, count: 6 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(0xffffffff83504770, 0xffff800016172004, 0, 1) -> d ddb{0}> trace ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 sys/ufs/ffs/ffs_alloc.c:948 ffs_alloc(fffffd8060adabb0,7,78a78,800,fffffd807f7d3208,ffff80002a1065a8) at ffs_alloc+0x31a sys/ufs/ffs/ffs_alloc.c:140 ffs2_balloc(fffffd8060adabb0,1c000,63,fffffd807f7d3208,1,ffff80002a1066b8) at ffs2_balloc+0x7cd sys/ufs/ffs/ffs_balloc.c:533 ffs_write(ffff80002a106740) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8069d2c960,ffff80002a1067f8,3,fffffd807f7d3208) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff5978,fffffd8069d2c960,fffffd807f7d3208,ffff80002a1068c0,ffff80002a1068a0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrsyscall(ffff8000ffff5978,b,20,ffff80002a106a50) at ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 syscall(ffff80002a106a50) at syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80002a106a50) at syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f5b3e6e1d0, count: -9 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a106430 rbx 0xfffffd8072a57150 rdx 0 rcx 0xffff8000ffff5978 rax 0xffffffff83466ff0 cpu_info_full_primary+0x1ff0 r8 0xffffffffffffffff r9 0xffff80002a1065a8 r10 0x88a57d886b3aa0e1 r11 0x8a1f2bf1d7c349ff r12 0xffff800016172000 r13 0x800 r14 0xffff800000a5f000 r15 0 rip 0xffffffff81787217 ffs_alloccg+0x187 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a106380 ss 0x10 ffs_alloccg+0x187: movl 0x4(%r12),%r15d ddb{0}> show proc PROC (syz-executor) tid=144350 pid=31811 tcnt=1 stat=onproc flags process=2 proc=1 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff42b0,0xffff8000ffff4548 process=0xffff8000371c5fb8 user=0xffff80002a101000, vmspace=0xfffffd806c3296f8 estcpu=36, cpticks=2, pctcpu=0.2, user=0, sys=5, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10472 67110 31811 0 2 0 syz-executor 45272 413777 92355 0 2 0 syz-executor 45272 297529 92355 0 3 0x4000080 fsleep syz-executor 6141 327665 42439 0 2 0 syz-executor 6141 51739 42439 0 3 0x4000080 kqsel syz-executor 54581 373665 39971 0 2 0 syz-executor 54581 70581 39971 0 3 0x4000080 ttyin syz-executor 54581 117797 39971 0 2 0x4000000 syz-executor 3678 390012 61051 0 2 0 syz-executor 3678 371407 61051 0 3 0x4000080 fsleep syz-executor 7220 273879 14828 0 2 0 syz-executor 7220 461009 14828 0 2 0x4000080 syz-executor 7220 251517 14828 0 2 0x4000000 syz-executor 81654 364246 41548 0 2 0 syz-executor 81654 204205 41548 0 3 0x4000080 fsleep syz-executor 41548 400059 83821 0 3 0x82 nanoslp syz-executor 48613 51420 83821 0 3 0x82 nanoslp syz-executor 39971 329820 83821 0 3 0x82 nanoslp syz-executor 92355 464511 83821 0 3 0x82 nanoslp syz-executor *31811 144350 83821 0 7 0x3 syz-executor 14828 286988 83821 0 2 0x482 syz-executor 61051 332072 83821 0 2 0x482 syz-executor 42439 240740 83821 0 2 0x482 syz-executor 85735 129801 1 0 3 0x100083 ttyin getty 32774 319171 0 0 3 0x14200 acct acct 20382 194695 0 0 3 0x14200 bored sosplice 89063 440194 0 0 3 0x14280 nfsidl nfsio 2735 100976 0 0 3 0x14280 nfsidl nfsio 23302 39032 0 0 3 0x14280 nfsidl nfsio 12039 64560 0 0 3 0x14280 nfsidl nfsio 40323 354585 0 0 3 0x14280 nfsidl nfsio 3855 183116 0 0 3 0x14280 nfsidl nfsio 74344 172563 0 0 3 0x14280 nfsidl nfsio 76952 137069 0 0 3 0x14280 nfsidl nfsio 66043 424913 0 0 3 0x14280 nfsidl nfsio 49304 344125 0 0 3 0x14280 nfsidl nfsio 72594 212920 0 0 3 0x14280 nfsidl nfsio 25969 517179 0 0 3 0x14280 nfsidl nfsio 25041 248345 0 0 3 0x14280 nfsidl nfsio 13619 284963 0 0 3 0x14280 nfsidl nfsio 29297 162365 0 0 3 0x14280 nfsidl nfsio 85854 304679 0 0 3 0x14280 nfsidl nfsio 10981 143761 0 0 3 0x14280 nfsidl nfsio 47985 387423 0 0 3 0x14280 nfsidl nfsio 54290 461920 0 0 3 0x14280 nfsidl nfsio 96671 241571 0 0 3 0x14280 nfsidl nfsio 83821 179659 6440 0 3 0x82 kqread syz-executor 6440 165864 95383 0 3 0x10008a sigsusp ksh 95383 158770 50458 0 3 0x98 kqread sshd-session 50458 202594 41875 0 3 0x92 kqread sshd-session 41875 366387 1 0 3 0x88 kqread sshd 34570 92539 72390 74 3 0x1100092 bpf pflogd 72390 433122 1 0 3 0x80 sbwait pflogd 4898 90676 90528 73 2 0x1100010 syslogd 90528 345231 1 0 3 0x100082 sbwait syslogd 64329 172910 1 0 3 0x100080 kqread resolvd 97414 55808 55332 77 3 0x100092 kqread dhcpleased 40641 484663 55332 77 3 0x100092 kqread dhcpleased 55332 522033 1 0 3 0x80 kqread dhcpleased 71144 291703 0 0 2 0x14200 smr 52463 453556 0 0 2 0x14200 zerothread 80173 71333 0 0 3 0x14200 aiodoned aiodoned 45406 108583 0 0 3 0x14200 syncer update 24329 516868 0 0 3 0x14200 cleaner cleaner 55104 249134 0 0 7 0x14200 reaper 79149 330344 0 0 3 0x14200 pgdaemon pagedaemon 24074 8025 0 0 3 0x14200 bored viomb 82136 519522 0 0 3 0x40014200 acpi0 acpi0 72320 84732 0 0 3 0x40014200 idle1 65449 64704 0 0 3 0x14200 bored softnet3 22764 371764 0 0 3 0x14200 bored softnet2 11563 375706 0 0 3 0x14200 bored softnet1 69769 258860 0 0 3 0x14200 bored softnet0 91798 3831 0 0 3 0x14200 bored systqmp 57169 235554 0 0 3 0x14200 bored systq 87313 447651 0 0 2 0x14200 softclockmp 93458 324285 0 0 2 0x40014200 softclock 61993 281709 0 0 3 0x40014200 idle0 1 455041 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 31811 (syz-executor) thread 0xffff8000ffff5978 (144350) exclusive rrwlock inode r = 0 (0xfffffd8060adac48) #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 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:679 #7 ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 #8 syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] #8 syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83553178) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 syscall+0x2cc mi_syscall sys/sys/syscall_mi.h:156 [inline] #1 syscall+0x2cc sys/arch/amd64/amd64/trap.c:577 #2 Xsyscall+0x128 Process 4898 (syslogd) thread 0xffff8000ffffdbe8 (90676) exclusive rrwlock inode r = 0 (0xfffffd806e4c41b0) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10217 10233K 10419K 166960K 12638 0 pcb 17 12K 12K 166960K 165 0 rtable 219 6K 7K 166960K 1618 0 pf 35 17K 22K 166960K 170 0 ifaddr 42 7K 8K 166960K 210 0 ifgroup 55 2K 2K 166960K 240 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 158 0 ioctlops 0 0K 4K 166960K 1590 0 iov 0 0K 24K 166960K 70 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1451 91K 92K 166960K 2467 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 27 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 89K 166960K 1374 0 sigio 0 0K 0K 166960K 11 0 proc 72 91K 128K 166960K 1648 0 subproc 104 6K 6K 166960K 599 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 108 0 in_multi 96 7K 7K 166960K 535 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 955 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 226 72K 93K 166960K 12064 0 UVM aobj 22 3K 3K 166960K 26 0 pinsyscall 42 84K 102K 166960K 3445 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 42 0 NDP 12 0K 2K 166960K 151 0 temp 62 6816K 6938K 166960K 37840 0 kqueue 13 20K 28K 166960K 120 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 292 0 289 3 2 1 3 0 8 0 rtentry 112 555 0 455 5 1 4 4 0 8 1 unpcb 144 849 0 832 8 7 1 4 0 8 0 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 808 259 0 255 7 6 1 4 0 8 0 arp 120 101 0 83 1 0 1 1 0 8 0 inpcb 336 1150 0 1143 17 15 2 7 0 8 1 nd6 136 143 0 118 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 2 0 1 0 8 0 kcovpl 48 46 0 38 1 0 1 1 0 8 0 ppxss 1168 4 0 4 3 3 0 1 0 8 0 pffrag 232 24 0 19 1 0 1 1 0 482 0 pffrnode 88 24 0 19 1 0 1 1 0 8 0 pffrent 40 85 0 80 2 1 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 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 116 0 85 1 0 1 1 0 8 0 pfstkey 128 119 0 87 2 0 2 2 0 8 0 pfstate 376 116 0 86 5 1 4 4 0 8 0 pfrule 1344 30 0 24 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2171 0 1755 33 5 28 30 0 8 2 art_table 32 2172 0 1755 4 0 4 4 0 8 0 art_node 16 553 0 463 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 2 1 1 1 0 8 0 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 23 0 4 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2786 0 1207 99 0 99 99 0 8 0 ffsino 272 2786 0 1207 106 0 106 106 0 8 0 nchpl 144 3981 0 3373 65 39 26 65 0 8 1 uvmvnodes 80 3806 0 0 78 0 78 78 0 8 0 vnodes 216 3806 0 0 212 0 212 212 0 8 0 namei 1024 17188 0 17188 6 4 2 2 0 8 2 percpumem 16 93 0 47 1 0 1 1 0 8 0 kstatmem 264 118 0 94 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 28848 0 28848 11 10 1 8 1 8 1 plimitpl 152 156 0 138 1 0 1 1 0 8 0 sigapl 424 1622 0 1550 10 1 9 9 0 8 0 futexpl 64 12314 0 12311 5 4 1 1 0 8 0 knotepl 120 534 0 0 17 0 17 17 0 8 0 kqueuepl 216 308 0 298 7 6 1 5 0 8 0 pipepl 320 324 0 297 5 2 3 5 0 8 0 fdescpl 496 1581 0 1550 8 3 5 5 0 8 0 filepl 152 8729 0 8482 30 18 12 19 0 8 1 lockfpl 104 235 0 233 1 0 1 1 0 8 0 lockfspl 48 104 0 102 1 0 1 1 0 8 0 sessionpl 144 63 0 54 1 0 1 1 0 8 0 pgrppl 48 115 0 98 1 0 1 1 0 8 0 ucredpl 104 828 0 814 1 0 1 1 0 8 0 zombiepl 144 1551 0 1550 1 0 1 1 0 8 0 processpl 1160 1622 0 1550 6 0 6 6 0 8 0 procpl 648 2712 0 2632 11 3 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 664 2298 0 2271 25 21 4 12 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 252 0 0 31 0 31 31 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 610 0 0 34 0 34 34 0 8 0 bufpl 280 7978 0 1074 494 0 494 494 0 8 0 anonpl 24 305927 0 302528 78 21 57 76 0 185 29 amapchunkpl 152 39882 0 39411 42 12 30 41 0 158 6 amappl16 200 6137 0 6120 21 17 4 14 0 8 1 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 197 0 184 1 0 1 1 0 8 0 amappl13 176 18 0 18 2 2 0 1 0 8 0 amappl12 168 2855 0 2824 4 2 2 3 0 8 0 amappl11 160 64 0 50 1 0 1 1 0 8 0 amappl10 152 13 0 13 2 2 0 1 0 8 0 amappl9 144 143 0 143 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 180 0 168 1 0 1 1 0 8 0 amappl6 120 618 0 616 1 0 1 1 0 8 0 amappl5 112 309 0 298 1 0 1 1 0 8 0 amappl4 104 431 0 413 1 0 1 1 0 8 0 amappl3 96 7451 0 7345 4 0 4 4 0 8 0 amappl2 88 1233 0 1165 2 0 2 2 0 8 0 amappl1 80 14018 0 13444 14 0 14 14 0 8 0 amappl 88 11348 0 11183 6 1 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma32768 32768 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 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 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 25 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1581 0 1550 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1581 0 1550 1 0 1 1 0 8 0 vmmpekpl 168 13864 0 13818 3 0 3 3 0 8 0 vmmpepl 168 104288 0 102463 106 20 86 91 0 357 2 vmsppl 440 1580 0 1550 6 2 4 5 0 8 0 rwobjpl 56 35915 0 31180 69 1 68 68 0 8 0 pdppl 4096 3169 0 3100 148 77 71 83 0 8 2 pvpl 32 33017 0 0 266 0 266 266 0 265 0 pmappl 248 1580 0 1550 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 499 0 116 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 ffs_cgread sys/ufs/ffs/ffs_alloc.c:856 [inline] ffs_alloccg(fffffd8060adabb0,4,78a78,800) at ffs_alloccg+0x187 sys/ufs/ffs/ffs_alloc.c:948 ffs_alloc(fffffd8060adabb0,7,78a78,800,fffffd807f7d3208,ffff80002a1065a8) at ffs_alloc+0x31a sys/ufs/ffs/ffs_alloc.c:140 ffs2_balloc(fffffd8060adabb0,1c000,63,fffffd807f7d3208,1,ffff80002a1066b8) at ffs2_balloc+0x7cd sys/ufs/ffs/ffs_balloc.c:533 ffs_write(ffff80002a106740) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd8069d2c960,ffff80002a1067f8,3,fffffd807f7d3208) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff8000ffff5978,fffffd8069d2c960,fffffd807f7d3208,ffff80002a1068c0,ffff80002a1068a0) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:682 ktrsyscall(ffff8000ffff5978,b,20,ffff80002a106a50) at ktrsyscall+0x31d sys/kern/kern_ktrace.c:182 syscall(ffff80002a106a50) at syscall+0x2eb mi_syscall sys/sys/syscall_mi.h:157 [inline] syscall(ffff80002a106a50) at syscall+0x2eb sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74f5b3e6e1d0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff83552f70) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83552f70) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 reaper(ffff800029fd8f38) at reaper+0x24b sys/kern/kern_exit.c:481 end trace frame: 0x0, count: 9 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff83552f70) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83552f70) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 reaper(ffff800029fd8f38) at reaper+0x24b sys/kern/kern_exit.c:481 end trace frame: 0x0, count: -6