login: panic: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *423568 59238 0 0 0 0 syz-executor2016281203 187130 9876 0 0x12 0x88 1 sshd db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825a183e) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a73908,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd807b7536d8) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd807b7536d8) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd807b7535c0) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f67a750,fffffd806f6d5100,fffffd806d88c1b0,0,14,fffffd806d88c1c4,8ec6d2d5293bddd2,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000211f2538,ffff8000211f2544,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000211f2538,ffff8000211f2544,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000211f2538,ffff8000211f2544,fffffd806d88c1bc,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000211f2538,ffff8000211f2544,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd806d88c100) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd806d88c100,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 sys/netinet/ip_output.c:332 end trace frame: 0xffff8000211f27b0, count: 0 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: acquiring blockable sleep lock with spinlock or critical section held (kernel_lock) &kernel_lock ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff825a183e) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a73908,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd807b7536d8) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd807b7536d8) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd807b7535c0) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f67a750,fffffd806f6d5100,fffffd806d88c1b0,0,14,fffffd806d88c1c4,8ec6d2d5293bddd2,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000211f2538,ffff8000211f2544,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000211f2538,ffff8000211f2544,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000211f2538,ffff8000211f2544,fffffd806d88c1bc,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000211f2538,ffff8000211f2544,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd806d88c100) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd806d88c100,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806f67a3a8,fffffd806d64b000,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd807b7537a0,0,ffff8000211f2948,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff8000ffff4540,4,ffff8000211f2948,0,ffff8000211f2a40) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff8000ffff4540,ffff8000211f29e8,ffff8000211f2a40) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000211f2ab0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f2ab0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc67c0, count: -20 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000211f1f70 rbx 0xffffffff828f2bff cpu_info_full_primary+0x2bff rdx 0x3fd rcx 0 rax 0x68 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3ded2453fe4a66c6 r11 0x5047e31ee9664577 r12 0xffffffff828f2a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff819ed3a8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000211f1f60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor2016281203) pid=423568 stat=onproc flags process=0 proc=0 pri=52, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff4a80,0xffff8000ffff42b0 process=0xffff8000ffff29a8 user=0xffff8000211ed000, vmspace=0xfffffd806d90d5d0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62812 445646 80382 0 2 0 syz-executor2016281203 97312 108256 87777 0 2 0 syz-executor2016281203 92639 451674 70169 0 2 0 syz-executor2016281203 71153 307219 89053 0 2 0 syz-executor2016281203 41881 389918 28718 0 3 0 netlock syz-executor2016281203 *59238 423568 70956 0 7 0 syz-executor2016281203 91114 67204 80437 0 2 0 syz-executor2016281203 28718 227010 88646 0 3 0x80 nanoslp syz-executor2016281203 70956 481235 88646 0 3 0x80 nanoslp syz-executor2016281203 89053 75215 88646 0 3 0x80 nanoslp syz-executor2016281203 80382 444264 88646 0 3 0x80 nanoslp syz-executor2016281203 87777 248409 88646 0 3 0x80 nanoslp syz-executor2016281203 93046 100118 88646 0 3 0x80 nanoslp syz-executor2016281203 70169 418153 88646 0 3 0x80 nanoslp syz-executor2016281203 80437 243359 88646 0 3 0x80 nanoslp syz-executor2016281203 88646 102340 24837 0 3 0x82 nanoslp syz-executor2016281203 24837 521482 9876 0 3 0x10008a sigsusp ksh 9876 187130 92254 0 7 0x9a sshd 23982 351769 1 0 3 0x100083 ttyin getty 92254 256308 1 0 3 0x88 kqread sshd 29957 512056 23878 73 3 0x1100090 kqread syslogd 23878 294044 1 0 3 0x100082 netio syslogd 7162 196248 1 0 3 0x100080 kqread resolvd 5020 168554 84588 77 3 0x100092 kqread dhcpleased 68934 109503 84588 77 3 0x100092 kqread dhcpleased 84588 239160 1 0 3 0x80 kqread dhcpleased 78381 121763 0 0 3 0x14200 bored smr 66653 393478 0 0 2 0x14200 zerothread 97667 22085 0 0 3 0x14200 aiodoned aiodoned 49153 219869 0 0 3 0x14200 syncer update 80421 212069 0 0 3 0x14200 cleaner cleaner 20427 174386 0 0 3 0x14200 reaper reaper 56550 198457 0 0 3 0x14200 pgdaemon pagedaemon 95875 479636 0 0 3 0x14200 bored viomb 99986 492741 0 0 3 0x40014200 acpi0 acpi0 4186 295867 0 0 3 0x40014200 idle1 99686 469813 0 0 3 0x14200 bored softnet 88292 261373 0 0 3 0x14200 bored systqmp 92651 99704 0 0 3 0x14200 bored systq 12558 53448 0 0 3 0x40014200 bored softclock 87094 50932 0 0 3 0x40014200 idle0 1 7942 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff829cb1d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 udp_input+0x7b0 #4 ip_deliver+0x322 sys/netinet/ip_input.c:657 #5 ip_ours+0x3ba sys/netinet/ip_input.c:616 #6 ip_input_if+0x2a1 #7 ipv4_input+0x48 sys/netinet/ip_input.c:242 #8 if_input_local+0x10e sys/net/if.c:774 #9 ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] #9 ip_output+0xb05 sys/netinet/ip_output.c:332 #10 udp_output+0x58d sys/netinet/udp_usrreq.c:1011 #11 sosend+0x632 sys/kern/uipc_socket.c:582 #12 dofilewritev+0x19c sys/kern/sys_generic.c:381 #13 sys_write+0x83 sys/kern/sys_generic.c:301 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 Xsyscall+0x128 Process 59238 (syz-executor2016281203) thread 0xffff8000ffff4540 (423568) exclusive rwlock netlock r = 0 (0xffffffff828ee470) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 solock+0x86 sys/kern/uipc_socket2.c:295 #3 sosend+0x517 sys/kern/uipc_socket.c:570 #4 dofilewritev+0x19c sys/kern/sys_generic.c:381 #5 sys_write+0x83 sys/kern/sys_generic.c:301 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff829cb1d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 udp_input+0x7b0 #4 ip_deliver+0x322 sys/netinet/ip_input.c:657 #5 ip_ours+0x3ba sys/netinet/ip_input.c:616 #6 ip_input_if+0x2a1 #7 ipv4_input+0x48 sys/netinet/ip_input.c:242 #8 if_input_local+0x10e sys/net/if.c:774 #9 ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] #9 ip_output+0xb05 sys/netinet/ip_output.c:332 #10 udp_output+0x58d sys/netinet/udp_usrreq.c:1011 #11 sosend+0x632 sys/kern/uipc_socket.c:582 #12 dofilewritev+0x19c sys/kern/sys_generic.c:381 #13 sys_write+0x83 sys/kern/sys_generic.c:301 #14 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #15 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10143 6388K 6419K 78643K 11233 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 108 0 ifaddr 24 7K 7K 78643K 24 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 2K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1166 73K 73K 78643K 1179 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 1 0K 0K 78643K 1 0 proc 55 74K 75K 78643K 226 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 25 122K 122K 78643K 25 0 exec 0 0K 2K 78643K 391 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 7 26K 26K 78643K 7 0 UVM amap 100 5K 5K 78643K 2236 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 19 4694K 4757K 78643K 3049 0 kqueue 11 16K 18K 78643K 24 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 17 0 14 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 136 33 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 312 173 0 160 2 0 2 2 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1415 0 38 87 0 87 87 0 8 0 ffsino 272 1415 0 38 92 0 92 92 0 8 0 nchpl 144 1590 0 47 58 0 58 58 0 8 0 uvmvnodes 80 1424 0 0 30 0 30 30 0 8 0 vnodes 224 1424 0 0 84 0 84 84 0 8 0 namei 1024 4131 0 4131 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 3976 0 3976 10 9 1 8 0 8 1 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 424 354 0 311 5 0 5 5 0 8 0 knotepl 120 46 0 0 2 0 2 2 0 8 0 kqueuepl 216 20 0 13 1 0 1 1 0 8 0 pipepl 336 79 0 76 2 1 1 1 0 8 0 fdescpl 496 340 0 312 5 1 4 4 0 8 0 filepl 152 1158 0 1098 3 0 3 3 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 64 0 54 1 0 1 1 0 8 0 zombiepl 144 312 0 311 2 1 1 1 0 8 0 processpl 1064 354 0 311 4 1 3 3 0 8 0 procpl 672 354 0 311 4 0 4 4 0 8 0 sockpl 480 223 0 194 5 0 5 5 0 8 1 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 64 0 0 8 0 8 8 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 115 0 0 7 0 7 7 0 8 0 bufpl 288 1940 0 87 133 0 133 133 0 8 0 anonpl 24 43639 0 41260 20 4 16 16 0 186 1 amapchunkpl 152 4084 0 3919 8 1 7 7 0 158 0 amappl16 200 74 0 72 2 1 1 1 0 8 0 amappl15 192 59 0 56 1 0 1 1 0 8 0 amappl13 176 32 0 31 2 1 1 1 0 8 0 amappl12 168 18 0 18 2 1 1 1 0 8 1 amappl11 160 42 0 32 1 0 1 1 0 8 0 amappl9 144 446 0 442 1 0 1 1 0 8 0 amappl8 136 339 0 336 1 0 1 1 0 8 0 amappl7 128 60 0 57 1 0 1 1 0 8 0 amappl6 120 165 0 140 1 0 1 1 0 8 0 amappl5 112 171 0 163 1 0 1 1 0 8 0 amappl4 104 577 0 558 1 0 1 1 0 8 0 amappl3 96 112 0 103 1 0 1 1 0 8 0 amappl2 88 337 0 301 1 0 1 1 0 8 0 amappl1 80 8679 0 8278 10 1 9 9 0 8 0 amappl 88 1934 0 1853 2 0 2 2 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 340 0 312 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 340 0 312 1 0 1 1 0 8 0 vmmpekpl 168 6034 0 6021 1 0 1 1 0 8 0 vmmpepl 168 26271 0 25255 47 2 45 45 0 357 0 vmsppl 368 339 0 312 3 0 3 3 0 8 0 rwobjpl 56 9416 0 7464 29 0 29 29 0 8 1 pdppl 4096 687 0 624 83 18 65 65 0 8 2 pvpl 32 130906 0 126551 38 1 37 37 0 265 1 pmappl 248 339 0 312 3 1 2 2 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 436 0 22 12 0 12 12 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:440 panic(ffffffff825a183e) at panic+0x177 sys/kern/subr_prf.c:202 witness_checkorder(ffffffff82a73908,9,0) at witness_checkorder+0x116d sys/kern/subr_witness.c:833 __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 read_rflags machine/cpufunc.h:195 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 intr_disable machine/cpufunc.h:216 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0xa1 sys/kern/kern_lock.c:142 selwakeup(fffffd807b7536d8) at selwakeup+0x16 klist_empty sys/sys/event.h:361 [inline] selwakeup(fffffd807b7536d8) at selwakeup+0x16 sys/kern/sys_generic.c:885 sorwakeup(fffffd807b7535c0) at sorwakeup+0xc9 sys/kern/uipc_socket.c:1699 udp_sbappend(fffffd806f67a750,fffffd806f6d5100,fffffd806d88c1b0,0,14,fffffd806d88c1c4,8ec6d2d5293bddd2,0) at udp_sbappend+0x3b1 sys/netinet/udp_usrreq.c:638 udp_input(ffff8000211f2538,ffff8000211f2544,11,2) at udp_input+0xbcb sys/netinet/udp_usrreq.c:427 ip_deliver(ffff8000211f2538,ffff8000211f2544,11,2) at ip_deliver+0x322 sys/netinet/ip_input.c:657 ip_ours(ffff8000211f2538,ffff8000211f2544,fffffd806d88c1bc,0) at ip_ours+0x3ba sys/netinet/ip_input.c:616 ip_input_if(ffff8000211f2538,ffff8000211f2544,4,0,ffff800000689000) at ip_input_if+0x2a1 ipv4_input(ffff800000689000,fffffd806d88c100) at ipv4_input+0x48 sys/netinet/ip_input.c:242 if_input_local(ffff800000689000,fffffd806d88c100,2) at if_input_local+0x10e sys/net/if.c:774 ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 ip_mloopback sys/netinet/ip_output.c:1791 [inline] ip_output(fffffd806d64b000,0,fffffd806f67a420,0,0,fffffd806f67a3a8,b060e3909d37f943) at ip_output+0xb05 sys/netinet/ip_output.c:332 udp_output(fffffd806f67a3a8,fffffd806d64b000,0,0) at udp_output+0x58d sys/netinet/udp_usrreq.c:1011 sosend(fffffd807b7537a0,0,ffff8000211f2948,0,0,0) at sosend+0x632 sys/kern/uipc_socket.c:582 dofilewritev(ffff8000ffff4540,4,ffff8000211f2948,0,ffff8000211f2a40) at dofilewritev+0x19c sys/kern/sys_generic.c:381 sys_write(ffff8000ffff4540,ffff8000211f29e8,ffff8000211f2a40) at sys_write+0x83 sys/kern/sys_generic.c:301 syscall(ffff8000211f2ab0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211f2ab0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc67c0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020ce8ff0) 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(ffffffff82a73700) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82a73700,3) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff8000211a4458,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 msleep(fffffd806f6ff870,fffffd806f6ff870,318,ffffffff825f40a7,0) at msleep+0x152 sys/kern/kern_synch.c:263 kqueue_scan(ffff8000211a45e0,4,ffff8000211a46e0,0,ffff800021143268,ffff8000211a485c) at kqueue_scan+0x1ab sys/kern/kern_event.c:1322 doppoll(ffff800021143268,ad0ca0d6200,4,0,ffff8000211a48d4,ffff8000211a49b0) at doppoll+0x280 sys/kern/sys_generic.c:1066 sys_ppoll(ffff800021143268,ffff8000211a4950,ffff8000211a49b0) at sys_ppoll+0x133 sys/kern/sys_generic.c:993 syscall(ffff8000211a4a20) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211a4a20) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6b40, count: 2 ddb{1}> trace x86_ipi_db(ffff800020ce8ff0) 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(ffffffff82a73700) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a73700) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82a73700,3) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3d3 sys/kern/sched_bsd.c:416 sleep_finish(ffff8000211a4458,1) at sleep_finish+0x198 sys/kern/kern_synch.c:437 msleep(fffffd806f6ff870,fffffd806f6ff870,318,ffffffff825f40a7,0) at msleep+0x152 sys/kern/kern_synch.c:263 kqueue_scan(ffff8000211a45e0,4,ffff8000211a46e0,0,ffff800021143268,ffff8000211a485c) at kqueue_scan+0x1ab sys/kern/kern_event.c:1322 doppoll(ffff800021143268,ad0ca0d6200,4,0,ffff8000211a48d4,ffff8000211a49b0) at doppoll+0x280 sys/kern/sys_generic.c:1066 sys_ppoll(ffff800021143268,ffff8000211a4950,ffff8000211a49b0) at sys_ppoll+0x133 sys/kern/sys_generic.c:993 syscall(ffff8000211a4a20) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000211a4a20) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe6b40, count: -13 ddb{1}>