panic: tcp_output Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *386402 51463 32767 0x10 0x4000000 0 syz-executor.4 163762 36956 32767 0x10 0 1 syz-executor.2 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bb9500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806c50cba0,fffffd807289d700,0,fffffd806972e300) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff8000ffff0d30,6,ffff80002e5149a0,0,ffff80002e514a90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff8000ffff0d30,ffff80002e514a48,ffff80002e514a90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e514b10) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e514b10) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x530c2c42070, 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: tcp_output ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bb9500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806c50cba0,fffffd807289d700,0,fffffd806972e300) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff8000ffff0d30,6,ffff80002e5149a0,0,ffff80002e514a90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff8000ffff0d30,ffff80002e514a48,ffff80002e514a90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e514b10) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e514b10) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x530c2c42070, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e514480 rbx 0xffffffff829b9b8f cpu_info_full_primary+0x2b8f rdx 0xffff800000bd6640 rcx 0 rax 0xffff8000ffff0d30 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe12c04b16fab19ce r11 0x73d17d725ba82068 r12 0xffffffff829b9990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff824835f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e514470 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.4) pid=386402 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=64, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff0fd0,0xffff8000fffeba50 process=0xffff8000fffed0b8 user=0xffff80002e50f000, vmspace=0xfffffd806bd388b0 estcpu=28, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 81733 108622 67180 32767 2 0x10 syz-executor.0 81733 458259 67180 32767 2 0x4000010 syz-executor.0 51463 512989 37435 32767 2 0x10 syz-executor.4 *51463 386402 37435 32767 7 0x4000010 syz-executor.4 51741 447033 71102 32767 3 0x90 nanoslp syz-executor.7 51741 522356 71102 32767 3 0x4000090 fsleep syz-executor.7 51741 49490 71102 32767 3 0x4000090 fsleep syz-executor.7 42703 192225 94572 32767 3 0x90 nanoslp syz-executor.1 42703 343774 94572 32767 3 0x4000090 fsleep syz-executor.1 81957 72340 15978 32767 2 0x10 syz-executor.3 81957 311890 15978 32767 3 0x4000090 fsleep syz-executor.3 29599 67848 79362 32767 2 0x10 syz-executor.6 29599 207875 79362 32767 3 0x4000090 fsleep syz-executor.6 24846 442668 99659 32767 3 0x90 nanoslp syz-executor.5 24846 386635 99659 32767 2 0x4000010 syz-executor.5 24846 307952 99659 32767 3 0x4000090 fsleep syz-executor.5 94572 138138 27129 32767 3 0x90 nanoslp syz-executor.1 27129 56892 99757 0 3 0x82 wait syz-executor.1 79362 470198 87032 32767 3 0x90 nanoslp syz-executor.6 87032 102132 99757 0 3 0x82 wait syz-executor.6 99659 198226 76266 32767 3 0x90 nanoslp syz-executor.5 76266 65093 99757 0 3 0x82 wait syz-executor.5 11824 87563 0 0 3 0x14200 bored sosplice 71102 114598 1 32767 3 0x90 nanoslp syz-executor.7 15978 48216 10226 32767 3 0x90 nanoslp syz-executor.3 10226 512816 99757 0 3 0x82 wait syz-executor.3 37435 288642 71424 32767 3 0x90 nanoslp syz-executor.4 71424 244682 99757 0 3 0x82 wait syz-executor.4 36956 163762 38750 32767 7 0x10 syz-executor.2 38750 3648 99757 0 3 0x82 wait syz-executor.2 67180 405422 59628 32767 3 0x90 nanoslp syz-executor.0 59628 141428 99757 0 3 0x82 wait syz-executor.0 99757 493079 3156 0 3 0x82 wait syz-fuzzer 99757 18500 3156 0 3 0x4000082 nanoslp syz-fuzzer 99757 479967 3156 0 3 0x4000082 wait syz-fuzzer 99757 262605 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 357592 3156 0 3 0x4000082 wait syz-fuzzer 99757 97777 3156 0 3 0x4000082 kqread syz-fuzzer 99757 523018 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 470055 3156 0 3 0x4000082 wait syz-fuzzer 99757 286620 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 265105 3156 0 3 0x4000082 wait syz-fuzzer 99757 223548 3156 0 3 0x4000082 nanoslp syz-fuzzer 99757 336813 3156 0 3 0x4000082 wait syz-fuzzer 99757 422399 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 224602 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 109719 3156 0 3 0x4000082 thrsleep syz-fuzzer 99757 226554 3156 0 3 0x4000082 wait syz-fuzzer 3156 512953 46749 0 3 0x10008a sigsusp ksh 46749 294556 96298 0 3 0x9a kqread sshd 78152 470925 1 0 3 0x100083 ttyin getty 96298 246693 1 0 3 0x88 kqread sshd 17444 481219 52134 73 3 0x1100090 kqread syslogd 52134 1825 1 0 3 0x100082 netio syslogd 39371 305811 1 0 3 0x100080 kqread resolvd 67078 427305 56570 77 3 0x100092 kqread dhcpleased 96296 498097 56570 77 3 0x100092 kqread dhcpleased 56570 388614 1 0 3 0x80 kqread dhcpleased 21295 196041 0 0 3 0x14200 bored smr 47490 459434 0 0 2 0x14200 zerothread 32826 453671 0 0 3 0x14200 aiodoned aiodoned 90085 222396 0 0 3 0x14200 syncer update 61190 126933 0 0 3 0x14200 cleaner cleaner 4479 272071 0 0 3 0x14200 reaper reaper 57890 146060 0 0 3 0x14200 pgdaemon pagedaemon 32617 234040 0 0 3 0x14200 bored viomb 87688 503133 0 0 3 0x40014200 acpi0 acpi0 1615 167291 0 0 3 0x40014200 idle1 48785 148738 0 0 3 0x14200 bored softnet 38643 495491 0 0 3 0x14200 bored softnet 85136 165545 0 0 3 0x14200 bored softnet 88917 440837 0 0 3 0x14200 bored softnet 88970 27971 0 0 3 0x14200 bored systqmp 39664 416543 0 0 3 0x14200 bored systq 28189 257804 0 0 3 0x40014200 bored softclock 63205 81034 0 0 3 0x40014200 idle0 1 469500 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 81733 (syz-executor.0) thread 0xffff8000fffeba40 (458259) exclusive rwlock amaplk r = 0 (0xfffffd80651c5668) #0 witness_lock+0x44d #1 uvm_fault_check+0x422 sys/uvm/uvm_fault.c:783 #2 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bd38308) #0 witness_lock+0x44d #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1771 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:673 #3 uvm_fault+0xf2 sys/uvm/uvm_fault.c:601 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 Process 51463 (syz-executor.4) thread 0xffff8000ffff0d30 (386402) exclusive rwlock netlock r = 0 (0xffffffff829ae840) #0 witness_lock+0x44d #1 sosend+0x500 sys/kern/uipc_socket.c:632 #2 sendit+0x65d sys/kern/uipc_syscalls.c:694 #3 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 #4 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 Process 36956 (syz-executor.2) thread 0xffff8000ffff6550 (163762) exclusive rrwlock inode r = 0 (0xfffffd806e7bc0a8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067e9d808) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10212 6412K 6419K 78643K 11319 0 pcb 13 12K 14K 78643K 17 0 rtable 240 6K 7K 78643K 805 0 ifaddr 82 17K 17K 78643K 121 0 sysctl 3 1K 1K 78643K 6 0 counters 56 35K 35K 78643K 66 0 ioctlops 0 0K 2K 78643K 137 0 iov 0 0K 28K 78643K 2181 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 4409 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 106 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 3885 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 117K 78643K 9198 0 sigio 0 0K 0K 78643K 190 0 proc 56 78K 115K 78643K 1263 0 subproc 104 6K 6K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 6849 0 in_multi 99 6K 7K 78643K 303 0 ether_multi 1 0K 0K 78643K 63 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 2537 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 62K 78643K 8 0 UVM amap 340 91K 107K 78643K 57511 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 344 0 NDP 11 0K 2K 78643K 42 0 temp 124 4726K 4854K 78643K 25217 0 kqueue 14 22K 26K 78643K 880 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 861 0 858 15 14 1 4 0 8 0 rtentry 112 181 0 68 4 0 4 4 0 8 0 unpcb 144 6980 0 6965 65 64 1 10 0 8 0 syncache 296 94 0 94 19 18 1 1 0 8 1 tcpqe 32 25 0 25 9 9 0 1 0 8 0 tcpcb 768 10221 0 10207 213 210 3 27 0 8 0 arp 120 30 0 12 1 0 1 1 0 8 0 ipq 40 20 0 20 5 5 0 1 0 8 0 ipqe 40 64 0 64 5 5 0 1 0 8 0 inpcb 368 16560 0 16546 170 168 2 17 0 8 0 nd6 48 52 0 25 1 0 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 731 0 266 33 3 30 30 0 8 0 art_table 32 732 0 266 4 0 4 4 0 8 0 art_node 16 180 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 0 1 0 1 1 0 8 0 semapl 112 3872 0 3862 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15399 0 13952 91 0 91 91 0 8 0 ffsino 272 15399 0 13952 97 0 97 97 0 8 0 nchpl 144 28256 0 26620 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 101454 0 101453 8 7 1 2 0 8 0 percpumem 16 45 0 5 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 78676 0 78676 35 34 1 8 0 8 1 plimitpl 152 2675 0 2654 5 4 1 2 0 8 0 sigapl 424 9464 0 9411 7 0 7 7 0 8 0 futexpl 64 86899 0 86893 6 5 1 1 0 8 0 knotepl 120 675 0 0 17 1 16 17 0 8 0 kqueuepl 216 2707 0 2694 45 44 1 5 0 8 0 pipepl 320 2807 0 2776 83 80 3 13 0 8 0 fdescpl 496 9446 0 9411 7 2 5 6 0 8 0 filepl 152 77632 0 77386 120 110 10 24 0 8 0 lockfpl 104 1309 0 1307 3 2 1 2 0 8 0 lockfspl 48 379 0 377 1 0 1 1 0 8 0 sessionpl 144 28 0 12 1 0 1 1 0 8 0 pgrppl 48 136 0 120 1 0 1 1 0 8 0 ucredpl 104 17551 0 17533 1 0 1 1 0 8 0 zombiepl 144 9411 0 9411 1 0 1 1 0 8 1 processpl 1064 9464 0 9411 4 0 4 4 0 8 0 procpl 672 27970 0 27893 26 19 7 9 0 8 0 sosppl 168 170 0 169 11 10 1 1 0 8 0 sockpl 488 24909 0 24877 423 418 5 32 0 8 1 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 24 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 3 0 3 3 0 8 0 mcl4k 4096 26 0 0 4 0 4 4 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 448 0 0 44 18 26 44 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 772 0 0 25 1 24 25 0 8 0 bufpl 288 18667 0 12337 453 0 453 453 0 8 0 anonpl 24 1998024 0 1984912 300 203 97 131 0 186 0 amapchunkpl 152 169820 0 169142 111 83 28 41 0 158 0 amappl16 200 32768 0 32370 203 179 24 45 0 8 2 amappl15 192 1238 0 1230 1 0 1 1 0 8 0 amappl14 184 1190 0 1181 1 0 1 1 0 8 0 amappl13 176 2403 0 2398 1 0 1 1 0 8 0 amappl12 168 1094 0 1090 1 0 1 1 0 8 0 amappl11 160 1261 0 1243 1 0 1 1 0 8 0 amappl10 152 1138 0 1134 1 0 1 1 0 8 0 amappl9 144 1723 0 1715 1 0 1 1 0 8 0 amappl8 136 988 0 864 5 0 5 5 0 8 0 amappl7 128 189 0 168 1 0 1 1 0 8 0 amappl6 120 1463 0 1450 2 1 1 2 0 8 0 amappl5 112 8108 0 8088 1 0 1 1 0 8 0 amappl4 104 2433 0 2394 2 0 2 2 0 8 0 amappl3 96 32315 0 32246 3 1 2 3 0 8 0 amappl2 88 3221 0 3178 3 2 1 2 0 8 0 amappl1 80 237432 0 236669 20 3 17 19 0 8 0 amappl 88 56439 0 56245 6 1 5 5 0 92 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 9446 0 9411 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 9446 0 9411 1 0 1 1 0 8 0 vmmpekpl 168 79918 0 79856 4 0 4 4 0 8 0 vmmpepl 168 941148 0 938254 266 133 133 149 0 357 5 vmsppl 368 9445 0 9411 4 0 4 4 0 8 0 rwobjpl 56 242987 0 235440 128 19 109 113 0 8 0 pdppl 4096 18899 0 18822 286 207 79 91 0 8 2 pvpl 32 3775915 0 3757373 508 331 177 256 0 265 11 pmappl 248 9445 0 9411 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1232 0 407 25 0 25 25 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bb9500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd806c50cba0,fffffd807289d700,0,fffffd806972e300) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd806c50cba0,0,ffff80002e514820,0,fffffd806972e300,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff8000ffff0d30,6,ffff80002e5149a0,0,ffff80002e514a90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff8000ffff0d30,ffff80002e514a48,ffff80002e514a90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002e514b10) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e514b10) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x530c2c42070, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82b4d158) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b4d158) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b4d158,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff8000261826e0,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806dc176f0,11,ffffffff8261c2d8,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806dc176f0) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806dc176f0) at bwrite+0x21b sys/kern/vfs_bio.c:769 ffs_update(fffffd8067e9d770,1) at ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 ufs_mkdir(ffff800026182a10) at ufs_mkdir+0x433 sys/ufs/ufs/ufs_vnops.c:1185 VOP_MKDIR(fffffd80675c9530,ffff800026182b70,ffff800026182ba0,ffff800026182aa0) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff6550,ffffff9c,7f7ffffcf010,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 end trace frame: 0xffff800026182d10, count: 0 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82b4d158) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b4d158) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b4d158,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff8000261826e0,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806dc176f0,11,ffffffff8261c2d8,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806dc176f0) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806dc176f0) at bwrite+0x21b sys/kern/vfs_bio.c:769 ffs_update(fffffd8067e9d770,1) at ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 ufs_mkdir(ffff800026182a10) at ufs_mkdir+0x433 sys/ufs/ufs/ufs_vnops.c:1185 VOP_MKDIR(fffffd80675c9530,ffff800026182b70,ffff800026182ba0,ffff800026182aa0) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000ffff6550,ffffff9c,7f7ffffcf010,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800026182d20) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800026182d20) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffcf080, count: -16