panic: ffs_valloc: dup alloc Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 22026 5220 0 0 0x4000000 0K syz-executor 249992 44231 0 0x2 0x1 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806c400278,8805,fffffd80097fd820,ffff80003c3cf370) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80003c3cf420) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8,ffff80003c3cf4a0) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80003c3cf678,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff800038f96d18,ffffff9c,200000000300,206,bbaf7815,0,3681648c0845b4d2) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff800038f96d18,ffff80003c3cf930,ffff80003c3cf880) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c3cf930) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3cf930) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8f868b390, count: 4 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: ffs_valloc: dup alloc ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806c400278,8805,fffffd80097fd820,ffff80003c3cf370) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80003c3cf420) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8,ffff80003c3cf4a0) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80003c3cf678,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff800038f96d18,ffffff9c,200000000300,206,bbaf7815,0,3681648c0845b4d2) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff800038f96d18,ffff80003c3cf930,ffff80003c3cf880) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c3cf930) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3cf930) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8f868b390, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c3cf100 rbx 0xffffffff83914e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff800038f96d18 rax 0xffffffff83913ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xcbfc0e78691ed2ea r11 0xc5a613c0de18e766 r12 0xffffffff83914c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff8340d295 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c3cf0f0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=22026 pid=5220 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=62, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038f97ca8,0xffff800038f97258 process=0xffff800038f99360 user=0xffff80003c3ca000, vmspace=0xfffffd806c6a3200 estcpu=12, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69464 104934 44231 0 2 0 syz-executor 69464 263975 44231 0 2 0x4000000 syz-executor 5220 232173 35323 0 2 0 syz-executor * 5220 22026 35323 0 7 0x4000000 syz-executor 5220 263645 35323 0 3 0x4000000 inode syz-executor 40576 406920 30577 0 2 0 syz-executor 40576 218929 30577 0 2 0x4000000 syz-executor 62316 199597 62059 0 2 0 syz-executor 62316 167307 62059 0 3 0x4000080 fsleep syz-executor 62316 137915 62059 0 3 0x4000080 fsleep syz-executor 65299 150286 12578 0 2 0xc80 syz-executor 65299 309066 12578 0 3 0x4000088 kqpoll syz-executor 65299 301723 12578 0 2 0x4000000 syz-executor 65299 34127 12578 0 3 0x4000080 fsleep syz-executor 35323 211520 49687 0 2 0xc82 syz-executor 44231 249992 49687 0 7 0x3 syz-executor 30577 16213 49687 0 2 0xc82 syz-executor 12578 110640 49687 0 2 0xc82 syz-executor 62059 286148 49687 0 2 0xc82 syz-executor 70372 481490 49687 0 2 0x2 syz-executor 49687 354846 79988 0 3 0x82 wait syz-executor 79988 64426 19528 0 3 0x10008a sigsusp ksh 19528 186242 68452 0 3 0x98 kqread sshd-session 68452 241207 99498 0 3 0x92 kqread sshd-session 21144 145838 1 0 3 0x100083 ttyin getty 99498 27977 1 0 3 0x88 kqread sshd 67237 149037 11728 74 3 0x1100092 bpf pflogd 11728 363646 1 0 3 0x80 sbwait pflogd 82549 63673 13614 73 3 0x1100090 kqread syslogd 13614 373543 1 0 3 0x100082 sbwait syslogd 14127 95999 1 0 3 0x100080 kqread resolvd 81096 2484 61659 77 3 0x100092 kqread dhcpleased 15417 192486 61659 77 3 0x100092 kqread dhcpleased 61659 266046 1 0 3 0x80 kqread dhcpleased 6822 449467 0 0 3 0x14200 bored smr 79351 229656 0 0 2 0x14200 zerothread 96602 445427 0 0 3 0x14200 aiodoned aiodoned 16770 212440 0 0 3 0x14200 syncer update 39156 369298 0 0 3 0x14200 cleaner cleaner 21228 330124 0 0 3 0x14200 reaper reaper 82445 504613 0 0 3 0x14200 pgdaemon pagedaemon 74308 407659 0 0 3 0x14200 bored viomb 92769 255640 0 0 3 0x40014200 acpi0 acpi0 93315 102102 0 0 3 0x40014200 idle1 91774 336842 0 0 3 0x14200 bored softnet1 96144 55636 0 0 2 0x14200 softnet0 42030 421116 0 0 3 0x14200 bored systqmp 38714 36456 0 0 3 0x14200 bored systq 82694 217616 0 0 3 0x14200 tmoslp softclockmp 70687 294348 0 0 3 0x40014200 tmoslp softclock 84894 238387 0 0 3 0x40014200 idle0 1 331811 0 0 4 0x48000082 init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 5220 (syz-executor) thread 0xffff800038f96d18 (22026) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839e5f80) #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 ffs_vget+0x283 sys/ufs/ffs/ffs_vfsops.c:1249 #5 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #6 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #7 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #8 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #9 vn_open+0x50d sys/kern/vfs_vnops.c:118 #10 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #11 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c400690) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 #10 vn_open+0x50d sys/kern/vfs_vnops.c:118 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c400318) #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+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 vn_open+0x22e sys/kern/vfs_vnops.c:109 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1161 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12101K 12281K 166960K 12226 0 pcb 17 12K 12K 166960K 41 0 rtable 257 9K 10K 166960K 394 0 pf 33 17K 18K 166960K 50 0 ifaddr 43 7K 7K 166960K 47 0 ifgroup 52 2K 2K 166960K 59 0 sysctl 3 1K 9K 166960K 7 0 counters 70 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1295 81K 82K 166960K 1421 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 11 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 229 0 sigio 0 0K 0K 166960K 1 0 proc 71 115K 164K 166960K 563 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 72 0 in_multi 99 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 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 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 393 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 235 167K 202K 166960K 3918 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 41 82K 105K 166960K 1395 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 12 0K 2K 166960K 30 0 temp 34 9110K 9176K 166960K 10564 0 kqueue 13 20K 26K 166960K 38 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 44 0 40 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 94 0 77 2 0 2 2 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 25 0 20 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 138 0 130 2 0 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 4 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 0 1 1 0 1 1 0 8 0 pffrent 40 3 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 pfstitem 24 24 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 0 1 0 1 1 0 8 0 pfstate 448 24 0 0 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 454 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 semapl 72 9 0 1 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1735 0 266 93 0 93 93 0 8 0 ffsino 296 1737 0 268 114 0 114 114 0 8 0 nchpl 144 2062 0 358 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 1852 0 0 103 0 103 103 0 8 0 namei 1024 6336 0 6334 2 0 2 2 0 8 1 percpumem 16 54 0 4 1 0 1 1 0 8 0 kstatmem 264 31 0 4 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6950 0 6950 4 3 1 3 1 8 1 plimitpl 152 43 0 24 1 0 1 1 0 8 0 sigapl 424 548 0 502 7 0 7 7 0 8 1 knotepl 120 295 0 0 9 0 9 9 0 8 0 kqueuepl 224 43 0 33 1 0 1 1 0 8 0 pipepl 344 136 0 109 3 0 3 3 0 8 0 fdescpl 528 532 0 502 3 0 3 3 0 8 0 filepl 160 2056 0 1834 11 0 11 11 0 8 0 lockfpl 104 23 0 20 1 0 1 1 0 8 0 lockfspl 48 13 0 10 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 195 0 181 1 0 1 1 0 8 0 zombiepl 144 505 0 502 1 0 1 1 0 8 0 processpl 1232 548 0 502 5 0 5 5 0 8 0 procpl 664 703 0 648 6 0 6 6 0 8 0 sockpl 752 282 0 253 6 0 6 6 0 8 2 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 141 0 0 9 0 9 9 0 8 0 bufpl 280 2486 0 105 171 0 171 171 0 8 0 anonpl 32 3884 0 0 32 0 32 32 0 246 0 amapchunkpl 152 11126 0 10649 29 0 29 29 0 158 10 amappl16 200 2026 0 2006 5 1 4 5 0 8 2 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 429 0 428 1 0 1 1 0 8 0 amappl13 176 131 0 119 1 0 1 1 0 8 0 amappl12 168 781 0 752 2 0 2 2 0 8 0 amappl11 160 24 0 24 1 1 0 1 0 8 0 amappl10 152 64 0 50 1 0 1 1 0 8 0 amappl9 144 277 0 276 1 0 1 1 0 8 0 amappl8 136 98 0 96 1 0 1 1 0 8 0 amappl7 128 148 0 135 1 0 1 1 0 8 0 amappl6 120 155 0 152 1 0 1 1 0 8 0 amappl5 112 100 0 90 1 0 1 1 0 8 0 amappl4 104 359 0 340 1 0 1 1 0 8 0 amappl3 96 2052 0 1941 4 0 4 4 0 8 0 amappl2 88 562 0 498 2 0 2 2 0 8 0 amappl1 80 11241 0 10644 17 0 17 17 0 8 2 amappl 88 3163 0 3001 5 0 5 5 0 92 0 uvmvnodes 80 102 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 532 0 502 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 532 0 502 1 0 1 1 0 8 0 vmmpekpl 168 6500 0 6463 3 0 3 3 0 8 0 vmmpepl 168 43720 0 41856 98 0 98 98 0 357 7 vmsppl 488 531 0 502 5 0 5 5 0 8 0 rwobjpl 80 16114 0 15087 26 0 26 26 0 8 2 pdppl 4096 1071 0 1004 95 20 75 83 0 8 8 pvpl 32 11085 0 0 91 1 90 90 0 265 0 pmappl 256 531 0 502 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 267 0 23 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8349e5db) at panic+0x1e5 sys/kern/subr_prf.c:198 ffs_inode_alloc(fffffd806c400278,8805,fffffd80097fd820,ffff80003c3cf370) at ffs_inode_alloc+0x94e ufs_makeinode(8805,fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8) at ufs_makeinode+0xcd sys/ufs/ufs/ufs_vnops.c:1732 ufs_create(ffff80003c3cf420) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd806c306d00,ffff80003c3cf6a8,ffff80003c3cf6d8,ffff80003c3cf4a0) at VOP_CREATE+0xfe sys/kern/vfs_vops.c:103 vn_open(ffff80003c3cf678,207,805) at vn_open+0x50d sys/kern/vfs_vnops.c:118 doopenat(ffff800038f96d18,ffffff9c,200000000300,206,bbaf7815,0,3681648c0845b4d2) at doopenat+0x35b sys/kern/vfs_syscalls.c:1161 sys_open(ffff800038f96d18,ffff80003c3cf930,ffff80003c3cf880) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff80003c3cf930) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3cf930) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8f868b390, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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(ffffffff839e5780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a2202b0,5b,0,ffff80002a35e690) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2202b0,5b,0,ffff80002a35e690) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a35e740) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a35e740) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754aef98a530, count: 8 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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(ffffffff839e5780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839e5780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a2202b0,5b,0,ffff80002a35e690) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2202b0,5b,0,ffff80002a35e690) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a35e740) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a35e740) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x754aef98a530, count: -7