login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 127105 64991 32767 0x10 0x4000000 1 syz-executor.4 *438980 64991 32767 0x10 0x4000000 0K syz-executor.4 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258bfeb) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82603adc,ffffffff8255f958,66b,ffffffff8256ebca) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000260a7a50,ffff80002e3a7368,ffff80002e3a73c0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3a7430) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a7430) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1318b286a0, 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: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_fault.c", line 1643 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff8258bfeb) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82603adc,ffffffff8255f958,66b,ffffffff8256ebca) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000260a7a50,ffff80002e3a7368,ffff80002e3a73c0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3a7430) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a7430) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1318b286a0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e3a70f0 rbx 0xffffffff8292dbff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff8000260a7a50 r8 0x101010101010101 r9 0x8080808080808080 r10 0x51e524a10720733a r11 0x832b825c4c7fb986 r12 0xffffffff8292da00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81b4ad48 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002e3a70e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.4) pid=438980 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=76, nice=20 forw=0xffffffffffffffff, list=0xffff8000260a6fd0,0xffff8000260a6020 process=0xffff80002af14870 user=0xffff80002e3a2000, vmspace=0xfffffd8067fc0d08 estcpu=26, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8869 103077 23897 32767 2 0x10 syz-executor.3 8869 2514 23897 32767 2 0x4000010 syz-executor.3 64991 174970 51274 32767 2 0x10 syz-executor.4 64991 127105 51274 32767 7 0x4000010 syz-executor.4 *64991 438980 51274 32767 7 0x4000010 syz-executor.4 73096 460942 87513 32767 2 0x10 syz-executor.5 73096 48455 87513 32767 2 0x4000010 syz-executor.5 63114 244684 1402 32767 2 0x10 syz-executor.7 63114 99975 1402 32767 3 0x4000090 fsleep syz-executor.7 63114 368155 1402 32767 3 0x4000090 fsleep syz-executor.7 63114 263332 1402 32767 3 0x4000090 fsleep syz-executor.7 67343 505168 20469 32767 2 0x10 syz-executor.6 67343 498568 20469 32767 2 0x4000010 syz-executor.6 45813 381073 31058 32767 2 0x10 syz-executor.2 45813 134214 31058 32767 3 0x4000090 fsleep syz-executor.2 1402 381572 46126 32767 2 0x490 syz-executor.7 87513 52934 27080 32767 3 0x90 nanoslp syz-executor.5 46126 188760 27764 0 3 0x82 wait syz-executor.7 27080 118228 27764 0 3 0x82 wait syz-executor.5 20469 350530 32440 32767 3 0x90 nanoslp syz-executor.6 51274 189344 67931 32767 2 0x10 syz-executor.4 32440 476746 27764 0 3 0x82 wait syz-executor.6 23897 449131 55564 32767 3 0x90 nanoslp syz-executor.3 55564 90609 27764 0 3 0x82 wait syz-executor.3 67931 449783 27764 0 3 0x82 wait syz-executor.4 31058 370252 59761 32767 3 0x90 nanoslp syz-executor.2 47011 259738 63923 32767 2 0x10 syz-executor.1 59761 476931 27764 0 3 0x82 wait syz-executor.2 63923 127184 27764 0 3 0x82 wait syz-executor.1 49707 232906 18037 32767 2 0x10 syz-executor.0 18037 280284 27764 0 3 0x82 wait syz-executor.0 27764 74415 85279 0 3 0x82 thrsleep syz-fuzzer 27764 412032 85279 0 2 0x4000002 syz-fuzzer 27764 451953 85279 0 3 0x4000082 thrsleep syz-fuzzer 27764 400213 85279 0 3 0x4000082 nanoslp syz-fuzzer 27764 104650 85279 0 2 0x4000002 syz-fuzzer 27764 295474 85279 0 3 0x4000082 thrsleep syz-fuzzer 27764 40011 85279 0 2 0x4000002 syz-fuzzer 27764 15997 85279 0 3 0x4000082 thrsleep syz-fuzzer 27764 39733 85279 0 3 0x4000082 thrsleep syz-fuzzer 85279 284559 16483 0 3 0x10008a sigsusp ksh 16483 212922 88430 0 3 0x9a kqread sshd 21264 384768 1 0 3 0x100083 ttyin getty 88430 179750 1 0 3 0x88 kqread sshd 40585 376085 51494 73 3 0x1100090 kqread syslogd 51494 479893 1 0 3 0x100082 netio syslogd 42442 424787 1 0 3 0x100080 kqread resolvd 81848 80261 5743 77 3 0x100092 kqread dhcpleased 37066 233479 5743 77 3 0x100092 kqread dhcpleased 5743 201293 1 0 3 0x80 kqread dhcpleased 41187 84788 0 0 3 0x14200 bored smr 47742 407142 0 0 2 0x14200 zerothread 76420 160198 0 0 3 0x14200 aiodoned aiodoned 24758 287922 0 0 3 0x14200 syncer update 61120 420425 0 0 3 0x14200 cleaner cleaner 69724 401743 0 0 3 0x14200 reaper reaper 74748 224504 0 0 3 0x14200 pgdaemon pagedaemon 46000 212354 0 0 3 0x14200 bored viomb 9762 478975 0 0 3 0x40014200 acpi0 acpi0 43451 54302 0 0 3 0x40014200 idle1 63708 31351 0 0 3 0x14200 bored softnet 97142 420030 0 0 3 0x14200 bored systqmp 39435 130723 0 0 3 0x14200 bored systq 71079 229861 0 0 2 0x40014200 softclock 36036 229335 0 0 3 0x40014200 idle0 1 505842 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 64991 (syz-executor.4) thread 0xffff8000260a6fd0 (127105) exclusive rwlock futex r = 0 (0xffffffff82918fc0) #0 witness_lock+0x44d #1 sys_futex+0x5c sys/kern/sys_futex.c:108 #2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 Process 64991 (syz-executor.4) thread 0xffff8000260a7a50 (438980) exclusive rwlock amaplk r = 0 (0xfffffd807dfd6f30) #0 witness_lock+0x44d #1 uvm_map_lock_entry+0x36 sys/uvm/uvm_map.c:508 #2 uvm_fault_unwire_locked+0x1e8 sys/uvm/uvm_fault.c:1655 #3 uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 #4 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #5 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #6 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd8067fc0d20) #0 witness_lock+0x44d #1 uvm_fault_unwire+0x31 sys/uvm/uvm_fault.c:1600 #2 sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b30cc0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x198 sys/kern/kern_synch.c:437 #4 rw_enter+0x35a sys/kern/kern_rwlock.c:286 #5 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #6 uvmfault_lookup+0xb9 sys/uvm/uvm_fault.c:1752 #7 uvm_fault_check+0x603 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #7 uvm_fault_check+0x603 sys/uvm/uvm_fault.c:712 #8 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #9 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1580 #10 sys_sysctl+0x2d8 sys/kern/kern_sysctl.c:240 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff82998610) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:233 #3 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #3 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #4 Xsyscall+0x128 Process 47011 (syz-executor.1) thread 0xffff8000212462a0 (259738) exclusive rrwlock inode r = 0 (0xfffffd806eeb8d60) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068e715e8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1850 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 6412K 6419K 78643K 11302 0 pcb 13 8K 8K 78643K 13 0 rtable 240 6K 7K 78643K 370 0 ifaddr 81 16K 16K 78643K 82 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 56 0 ioctlops 0 0K 2K 78643K 100 0 iov 0 0K 16K 78643K 146 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1631 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 43 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 125K 78643K 640 0 sigio 0 0K 0K 78643K 6 0 proc 56 74K 99K 78643K 478 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3 0 in_multi 99 6K 6K 78643K 99 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 283 1261K 1261K 78643K 283 0 exec 0 0K 2K 78643K 616 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 324 82K 96K 78643K 9523 0 UVM aobj 53 2K 2K 78643K 55 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 21 0 NDP 11 0K 2K 78643K 27 0 temp 124 4707K 4771K 78643K 5459 0 kqueue 12 18K 22K 78643K 59 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 56 0 53 1 0 1 1 0 8 0 rtentry 112 114 0 3 4 0 4 4 0 8 0 unpcb 136 282 0 269 3 2 1 3 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 33 0 33 1 1 0 1 0 8 0 tcpcb 736 248 0 241 11 10 1 8 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 312 466 0 459 14 13 1 9 0 8 0 nd6 48 27 0 2 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 4 29 0 29 29 0 8 0 art_table 32 459 0 4 4 0 4 4 0 8 0 art_node 16 113 0 12 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 5 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 52 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2447 0 1018 90 0 90 90 0 8 0 ffsino 272 2447 0 1018 96 0 96 96 0 8 0 nchpl 144 3404 0 1739 62 0 62 62 0 8 0 uvmvnodes 80 2560 0 0 53 0 53 53 0 8 0 vnodes 224 2560 0 0 151 0 151 151 0 8 0 namei 1024 13129 0 13129 2 1 1 2 0 8 1 percpumem 16 40 0 0 1 0 1 1 0 8 0 scxspl 216 9569 0 9569 10 9 1 8 0 8 1 plimitpl 152 83 0 61 2 1 1 2 0 8 0 sigapl 424 913 0 864 7 0 7 7 0 8 0 futexpl 64 4483 0 4478 1 0 1 1 0 8 0 knotepl 120 115 0 0 4 0 4 4 0 8 0 kqueuepl 216 163 0 155 3 2 1 3 0 8 0 pipepl 336 232 0 204 8 5 3 8 0 8 0 fdescpl 496 899 0 864 7 2 5 6 0 8 0 filepl 152 6153 0 5917 22 12 10 17 0 8 0 lockfpl 104 77 0 75 1 0 1 1 0 8 0 lockfspl 48 37 0 35 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 96 1732 0 1714 1 0 1 1 0 8 0 zombiepl 144 864 0 864 1 0 1 1 0 8 1 processpl 1064 913 0 864 5 1 4 4 0 8 0 procpl 672 1983 0 1917 10 4 6 8 0 8 0 sockpl 480 815 0 792 25 21 4 16 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 158 0 0 19 0 19 19 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 300 0 0 18 0 18 18 0 8 0 bufpl 288 4487 0 142 311 0 311 311 0 8 0 anonpl 24 201930 0 187569 97 8 89 90 0 186 0 amapchunkpl 152 22821 0 22016 43 9 34 42 0 158 1 amappl16 200 1721 0 1336 23 2 21 22 0 8 0 amappl15 192 87 0 82 1 0 1 1 0 8 0 amappl14 184 89 0 84 1 0 1 1 0 8 0 amappl13 176 151 0 145 1 0 1 1 0 8 0 amappl12 168 76 0 73 1 0 1 1 0 8 0 amappl11 160 116 0 103 1 0 1 1 0 8 0 amappl10 152 179 0 169 1 0 1 1 0 8 0 amappl9 144 532 0 528 1 0 1 1 0 8 0 amappl8 136 624 0 570 2 0 2 2 0 8 0 amappl7 128 188 0 174 1 0 1 1 0 8 0 amappl6 120 257 0 234 2 1 1 2 0 8 0 amappl5 112 776 0 750 1 0 1 1 0 8 0 amappl4 104 869 0 843 2 1 1 2 0 8 0 amappl3 96 339 0 322 1 0 1 1 0 8 0 amappl2 88 680 0 635 3 1 2 3 0 8 0 amappl1 80 19290 0 18650 18 4 14 18 0 8 0 amappl 88 9082 0 8826 7 0 7 7 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 54 0 2 1 0 1 1 0 8 0 uaddrrnd 24 899 0 864 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 899 0 864 1 0 1 1 0 8 0 vmmpekpl 168 11609 0 11555 3 0 3 3 0 8 0 vmmpepl 168 84931 0 82301 126 4 122 122 0 357 4 vmsppl 368 898 0 864 4 0 4 4 0 8 0 rwobjpl 56 24094 0 20152 56 0 56 56 0 8 0 pdppl 4096 1805 0 1728 124 43 81 95 0 8 4 pvpl 32 466536 0 447051 259 54 205 259 0 265 43 pmappl 248 898 0 864 3 0 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 739 0 74 20 0 20 20 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(ffffffff8258bfeb) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82603adc,ffffffff8255f958,66b,ffffffff8256ebca) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_fault_unwire_locked(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire_locked+0x2eb sys/uvm/uvm_fault.c:1640 uvm_fault_unwire(fffffd8067fc0d08,20000000,20011000) at uvm_fault_unwire+0x3f sys/uvm/uvm_fault.c:1601 sys_sysctl(ffff8000260a7a50,ffff80002e3a7368,ffff80002e3a73c0) at sys_sysctl+0x229 sys/kern/kern_sysctl.c:254 syscall(ffff80002e3a7430) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a7430) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1318b286a0, count: -8 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(ffffffff82b30ab8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b30ab8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 sleep_setup(ffff80002e3a0f30,ffff8000260a6fd0,120,ffffffff825843bd,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff8000260a6fd0,ffffffff82918fb0,120,ffffffff825843bd,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(a13e2938390,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff8000260a6fd0,ffff80002e3a10c0,ffff80002e3a1120) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3a1190) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a1190) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1375b01170, count: 5 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(ffffffff82b30ab8) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b30ab8) at __mp_lock+0x129 sys/kern/kern_lock.c:147 sleep_setup(ffff80002e3a0f30,ffff8000260a6fd0,120,ffffffff825843bd,0) at sleep_setup+0xd3 sys/kern/kern_synch.c:374 rwsleep(ffff8000260a6fd0,ffffffff82918fb0,120,ffffffff825843bd,0) at rwsleep+0xc0 sys/kern/kern_synch.c:315 futex_wait(a13e2938390,1,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:260 sys_futex(ffff8000260a6fd0,ffff80002e3a10c0,ffff80002e3a1120) at sys_futex+0xf8 sys/kern/sys_futex.c:111 syscall(ffff80002e3a1190) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002e3a1190) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1375b01170, count: -10