panic: pool_do_get: fdescpl free list modified: page 0xfffffd8066ab5000; item addr 0xfffffd8066ab5008; offset 0x48=0xdeafbeaf Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *297589 49617 32767 0x10 0 0K syz-executor.5 516225 45450 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825fd0e3) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b436a0,9,ffff8000272f0798) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b436a0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff90a8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff90a8) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff8000fffefce0,ffff8000ffff90a8,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff800027703510,1,ffffffff8155b820,0,ffff8000272f09d0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff8000272f0a40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000272f0a40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff5680, 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: pool_do_get: fdescpl free list modified: page 0xfffffd8066ab5000; item addr 0xfffffd8066ab5008; offset 0x48=0xdeafbeaf ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff825fd0e3) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b436a0,9,ffff8000272f0798) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b436a0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff90a8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff90a8) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff8000fffefce0,ffff8000ffff90a8,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff800027703510,1,ffffffff8155b820,0,ffff8000272f09d0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff8000272f0a40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000272f0a40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff5680, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000272f05e0 rbx 0xffffffff829afc5f cpu_info_full_primary+0x2c5f rdx 0 rcx 0 rax 0xffff800027703510 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1fb928f02a783a7f r11 0x6a5296fba3811a46 r12 0xffffffff829afa60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81a3e908 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000272f05d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.5) pid=297589 stat=onproc flags process=10 proc=0 pri=67, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff8000277022b0,0xffff800027907cf0 process=0xffff8000ffff90a8 user=0xffff8000272eb000, vmspace=0xfffffd806b130a28 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48285 157409 63008 32767 3 0x90 nanoslp syz-executor.6 48285 17399 63008 32767 3 0x4000090 fsleep syz-executor.6 48285 397952 63008 32767 3 0x4000090 fsleep syz-executor.6 84282 476187 18909 32767 2 0x490 syz-executor.1 18909 107091 94243 0 3 0x82 wait syz-executor.1 85272 458247 65484 32767 2 0x490 syz-executor.4 65484 177722 94243 0 3 0x82 wait syz-executor.4 *49617 297589 6287 32767 7 0x10 syz-executor.5 6287 168190 94243 0 3 0x82 wait syz-executor.5 63008 3719 77561 32767 3 0x90 nanoslp syz-executor.6 77561 477112 94243 0 3 0x82 wait syz-executor.6 80655 16861 31048 32767 2 0x490 syz-executor.0 31048 254555 94243 0 3 0x82 wait syz-executor.0 50280 24775 63053 32767 2 0x10 syz-executor.7 63053 508063 94243 0 3 0x82 wait syz-executor.7 80949 443996 0 0 3 0x14200 bored sosplice 69107 42794 87793 32767 2 0x490 syz-executor.3 87793 37011 94243 0 3 0x82 wait syz-executor.3 4038 480276 29702 32767 3 0x90 nanoslp syz-executor.2 29702 465678 94243 0 3 0x82 wait syz-executor.2 94243 329937 76344 0 3 0x82 thrsleep syz-fuzzer 94243 514899 76344 0 2 0x4000482 syz-fuzzer 94243 168265 76344 0 3 0x4000082 thrsleep syz-fuzzer 94243 140336 76344 0 3 0x4000082 thrsleep syz-fuzzer 94243 244805 76344 0 3 0x4000082 thrsleep syz-fuzzer 94243 88232 76344 0 2 0x4000482 syz-fuzzer 94243 80040 76344 0 3 0x4000082 kqread syz-fuzzer 94243 169284 76344 0 3 0x4000082 thrsleep syz-fuzzer 76344 270283 87160 0 3 0x10008a sigsusp ksh 87160 157140 45282 0 3 0x9a kqread sshd 54144 478789 1 0 3 0x100083 ttyin getty 45282 262119 1 0 3 0x88 kqread sshd 41191 373512 68376 73 3 0x1100090 kqread syslogd 68376 132609 1 0 3 0x100082 netio syslogd 22902 330698 1 0 3 0x100080 kqread resolvd 81183 486598 19661 77 3 0x100092 kqread dhcpleased 35730 417382 19661 77 3 0x100092 kqread dhcpleased 19661 138996 1 0 3 0x80 kqread dhcpleased 78531 365314 0 0 3 0x14200 bored smr 98351 237913 0 0 2 0x14200 zerothread 74197 85939 0 0 3 0x14200 aiodoned aiodoned 78163 198818 0 0 3 0x14200 syncer update 38054 460101 0 0 3 0x14200 cleaner cleaner 45450 516225 0 0 7 0x14200 reaper 94117 166408 0 0 3 0x14200 pgdaemon pagedaemon 85636 476167 0 0 3 0x14200 bored viomb 4189 464147 0 0 3 0x40014200 acpi0 acpi0 48119 18335 0 0 3 0x40014200 idle1 11102 297726 0 0 3 0x14200 bored softnet 94083 416532 0 0 3 0x14200 bored softnet 82143 264178 0 0 3 0x14200 bored softnet 25382 476978 0 0 3 0x14200 bored softnet 86914 469390 0 0 3 0x14200 fdlock systqmp 6780 98700 0 0 3 0x14200 bored systq 44936 16408 0 0 2 0x40014200 softclock 60680 337051 0 0 3 0x40014200 idle0 1 494936 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex fdescpl r = 0 (0xffffffff82b436b0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1111 #5 process_new+0x13b sys/kern/kern_fork.c:259 #6 fork1+0x30b sys/kern/kern_fork.c:383 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 CPU 1: exclusive mutex anonpl r = 0 (0xffffffff82a6f3f8) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_put+0x8a sys/kern/subr_pool.c:799 #4 amap_wipeout+0x1b1 sys/uvm/uvm_amap.c:504 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #8 reaper+0x19a sys/kern/kern_exit.c:454 #9 proc_trampoline+0x1c Process 49617 (syz-executor.5) thread 0xffff800027703510 (297589) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829e9808) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 exclusive mutex fdescpl r = 0 (0xffffffff82b436b0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1111 #5 process_new+0x13b sys/kern/kern_fork.c:259 #6 fork1+0x30b sys/kern/kern_fork.c:383 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 Process 50280 (syz-executor.7) thread 0xffff8000fffed268 (24775) exclusive rrwlock inode r = 0 (0xfffffd8069280810) #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:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3116 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c74da38) #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: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 domkdirat+0x75 sys/kern/vfs_syscalls.c:3101 #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 Process 45450 (reaper) thread 0xffff800021143508 (516225) exclusive rwlock amaplk r = 0 (0xfffffd806c4282f0) #0 witness_lock+0x44d #1 amap_unref+0x2b sys/uvm/uvm_amap.c:1365 #2 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #3 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #4 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #5 reaper+0x19a sys/kern/kern_exit.c:454 #6 proc_trampoline+0x1c Process 86914 (systqmp) thread 0xffff8000210f8540 (469390) shared rwlock systqmp r = 0 (0xffffffff8293caf0) #0 witness_lock+0x44d #1 taskq_thread+0xca sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 6413K 6420K 78643K 11349 0 pcb 13 16K 18K 78643K 19 0 rtable 242 6K 7K 78643K 1046 0 ifaddr 81 17K 17K 78643K 174 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 82 0 ioctlops 0 0K 2K 78643K 120 0 iov 0 0K 32K 78643K 2345 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1271 79K 79K 78643K 2149 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 43 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2178 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 125K 78643K 5604 0 sigio 0 0K 0K 78643K 504 0 proc 56 78K 115K 78643K 1300 0 subproc 104 6K 6K 78643K 273 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 384 0 in_multi 99 6K 6K 78643K 282 0 ether_multi 1 0K 0K 78643K 11 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 307 1367K 1367K 78643K 307 0 exec 0 0K 2K 78643K 1520 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 272 88K 103K 78643K 35428 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 147 0 NDP 11 0K 2K 78643K 66 0 temp 124 4734K 4814K 78643K 19217 0 kqueue 22 33K 34K 78643K 651 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 120 614 0 611 9 8 1 3 0 8 0 rtentry 112 262 0 148 4 0 4 4 0 8 0 unpcb 136 5778 0 5765 44 43 1 6 0 8 0 syncache 296 61 0 61 8 8 0 1 0 8 0 tcpqe 32 21 0 21 8 8 0 1 0 8 0 tcpcb 736 6183 0 6167 103 94 9 21 0 8 7 arp 120 46 0 26 1 0 1 1 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 10 0 10 2 2 0 1 0 8 0 inpcb 312 8156 0 8137 49 41 8 16 0 8 6 nd6 48 69 0 43 1 0 1 1 0 8 0 kcovpl 48 21 0 13 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1073 0 613 32 3 29 30 0 8 0 art_table 32 1074 0 613 4 0 4 4 0 8 0 art_node 16 261 0 157 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 6 1 0 1 1 0 8 0 semapl 112 2176 0 2166 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 8652 0 7213 91 0 91 91 0 8 0 ffsino 272 8652 0 7213 97 0 97 97 0 8 0 nchpl 144 16297 0 14660 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 54321 0 54320 2 1 1 2 0 8 0 percpumem 16 53 0 13 1 0 1 1 0 8 0 kstatmem 264 48 0 26 2 0 2 2 0 8 0 scxspl 216 46042 0 46042 27 26 1 8 0 8 1 plimitpl 152 1375 0 1353 2 1 1 2 0 8 0 sigapl 424 5856 0 5803 7 0 7 7 0 8 0 futexpl 64 58200 0 58198 1 0 1 1 0 8 0 knotepl 120 621 0 0 17 0 17 17 0 8 0 kqueuepl 216 2115 0 2100 32 30 2 5 0 8 0 pipepl 336 2152 0 2124 36 29 7 13 0 8 4 fdescpl 496 5838 0 5807 7 2 5 6 0 8 0 pool(0xffffffff82b436a0:fdescpl): page inconsistency: page 0xfffffd8066ab5000; 4 on list, 3 missing, 8 items per page filepl 152 42286 0 42050 60 45 15 20 0 8 4 lockfpl 104 1231 0 1229 1 0 1 1 0 8 0 lockfspl 48 490 0 488 1 0 1 1 0 8 0 sessionpl 144 36 0 20 1 0 1 1 0 8 0 pgrppl 48 127 0 111 1 0 1 1 0 8 0 ucredpl 96 5899 0 5881 1 0 1 1 0 8 0 zombiepl 144 5808 0 5803 1 0 1 1 0 8 0 processpl 1064 5857 0 5803 5 1 4 5 0 8 0 procpl 672 16531 0 16467 12 5 7 8 0 8 0 sosppl 168 120 0 120 5 4 1 1 0 8 1 sockpl 480 14700 0 14673 203 193 10 28 0 8 5 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 23 0 0 3 0 3 3 0 8 0 mcl12k 12288 22 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 42 0 0 5 2 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 184 0 0 19 2 17 19 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 3671 0 0 226 0 226 226 0 8 0 bufpl 288 12567 0 6236 453 0 453 453 0 8 0 anonpl 24 1148523 0 1136846 155 68 87 103 0 186 0 amapchunkpl 152 119951 0 119222 82 44 38 40 0 158 1 amappl16 200 16253 0 15898 68 48 20 32 0 8 0 amappl15 192 661 0 658 1 0 1 1 0 8 0 amappl14 184 468 0 463 1 0 1 1 0 8 0 amappl13 176 812 0 810 1 0 1 1 0 8 0 amappl12 168 2510 0 2504 1 0 1 1 0 8 0 amappl11 160 385 0 367 1 0 1 1 0 8 0 amappl10 152 529 0 521 1 0 1 1 0 8 0 amappl9 144 537 0 531 1 0 1 1 0 8 0 amappl8 136 1338 0 1242 4 0 4 4 0 8 0 amappl7 128 623 0 610 1 0 1 1 0 8 0 amappl6 120 349 0 328 2 1 1 2 0 8 0 amappl5 112 4556 0 4536 1 0 1 1 0 8 0 amappl4 104 1549 0 1522 2 0 2 2 0 8 0 amappl3 96 20316 0 20269 3 1 2 3 0 8 0 amappl2 88 7709 0 7640 3 0 3 3 0 8 0 amappl1 80 141753 0 141129 20 4 16 19 0 8 0 amappl 88 34275 0 34113 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 5838 0 5807 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5838 0 5807 1 0 1 1 0 8 0 vmmpekpl 168 52807 0 52748 5 1 4 4 0 8 0 vmmpepl 168 578976 0 576589 167 40 127 136 0 357 0 vmsppl 368 5837 0 5806 4 0 4 4 0 8 0 rwobjpl 56 149586 0 142224 110 4 106 108 0 8 0 pdppl 4096 11683 0 11612 243 162 81 95 0 8 10 pvpl 32 2258010 0 2241524 291 135 156 240 0 265 0 pmappl 248 5837 0 5806 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1376 0 336 31 0 31 31 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(ffffffff825fd0e3) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b436a0,9,ffff8000272f0798) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b436a0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff90a8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff90a8) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff8000fffefce0,ffff8000ffff90a8,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff800027703510,1,ffffffff8155b820,0,ffff8000272f09d0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff8000272f0a40) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000272f0a40) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff5680, count: -9 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff829e9600) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e9600) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021148f00,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806a6c0180) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806a6c0180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021143508) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 6 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 __mp_lock(ffffffff829e9600) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829e9600) at __mp_lock+0x133 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021148f00,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806a6c0180) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806a6c0180) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021143508) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -9