panic: pool_do_get: fdescpl free list modified: page 0xfffffd8067e02000; item addr 0xfffffd8067e02ba8; offset 0x48=0xdead4113 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *365835 16325 32767 0x10 0 1K syz-executor.5 77408 25170 0 0x14000 0x200 0 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827b427e) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82cad108,9,ffff800027b93368) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82cad108,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff50d8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff50d8) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff8000211e8598,ffff8000ffff50d8,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000211e8b08,1,ffffffff818b0a90,0,ffff800027b935b0,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800027b93630) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800027b93630) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc18d0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: pool_do_get: fdescpl free list modified: page 0xfffffd8067e02000; item addr 0xfffffd8067e02ba8; offset 0x48=0xdead4113 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827b427e) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82cad108,9,ffff800027b93368) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82cad108,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff50d8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff50d8) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff8000211e8598,ffff8000ffff50d8,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000211e8b08,1,ffffffff818b0a90,0,ffff800027b935b0,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800027b93630) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800027b93630) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc18d0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800027b931b0 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff8000211e8b08 r8 0x101010101010101 r9 0x8080808080808080 r10 0x288b136d9aea74ef r11 0x6955235978d775ea r12 0xffff800020d69990 r13 0 r14 0 r15 0x1 rip 0xffffffff817bc458 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800027b931a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.5) pid=365835 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000211e8dc0,0xffff8000211e82f0 process=0xffff8000ffff50d8 user=0xffff800027b8e000, vmspace=0xfffffd807e1368b0 estcpu=36, cpticks=0, pctcpu=0.4 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36804 294113 9484 32767 2 0x10 syz-executor.2 40023 242109 63301 32767 2 0x10 syz-executor.4 40023 59661 63301 32767 2 0x4000010 syz-executor.4 91931 188624 35920 32767 2 0x10 syz-executor.7 91931 177690 35920 32767 3 0x4000090 fsleep syz-executor.7 40545 457515 45609 32767 2 0x10 syz-executor.3 40545 222352 45609 32767 3 0x4000090 fsleep syz-executor.3 60688 155025 50169 32767 2 0x10 syz-executor.1 60688 179935 50169 32767 3 0x4000090 fsleep syz-executor.1 66776 8338 4789 32767 3 0x90 nanoslp syz-executor.0 66776 171582 4789 32767 3 0x4000010 fdlock syz-executor.0 45609 21421 44861 32767 3 0x90 nanoslp syz-executor.3 44861 502174 67154 0 3 0x82 wait syz-executor.3 86703 349350 0 0 3 0x14200 bored sosplice 35920 214473 43645 32767 2 0x10 syz-executor.7 43645 106443 67154 0 3 0x82 wait syz-executor.7 60365 217976 43785 32767 3 0x90 nanoslp syz-executor.6 63301 120267 99530 32767 3 0x90 nanoslp syz-executor.4 43785 31798 67154 0 3 0x82 wait syz-executor.6 *16325 365835 9674 32767 7 0x10 syz-executor.5 9674 39263 67154 0 3 0x82 wait syz-executor.5 99530 300510 67154 0 3 0x82 wait syz-executor.4 9484 497114 32258 32767 3 0x90 nanoslp syz-executor.2 32258 16204 67154 0 3 0x82 wait syz-executor.2 50169 295284 58572 32767 3 0x90 nanoslp syz-executor.1 58572 283030 67154 0 3 0x82 wait syz-executor.1 4789 265634 79000 32767 3 0x90 nanoslp syz-executor.0 79000 168260 67154 0 3 0x82 wait syz-executor.0 67154 371438 75684 0 3 0x82 thrsleep syz-fuzzer 67154 193732 75684 0 3 0x4000082 thrsleep syz-fuzzer 67154 206611 75684 0 3 0x4000082 wait syz-fuzzer 67154 71606 75684 0 3 0x4000082 thrsleep syz-fuzzer 67154 144110 75684 0 3 0x4000082 wait syz-fuzzer 67154 332244 75684 0 3 0x4000082 wait syz-fuzzer 67154 435104 75684 0 3 0x4000082 wait syz-fuzzer 67154 444099 75684 0 3 0x4000082 wait syz-fuzzer 67154 426236 75684 0 3 0x4000082 thrsleep syz-fuzzer 67154 119228 75684 0 3 0x4000082 wait syz-fuzzer 67154 95542 75684 0 3 0x4000082 thrsleep syz-fuzzer 67154 17954 75684 0 3 0x4000082 kqread syz-fuzzer 67154 54808 75684 0 3 0x4000082 wait syz-fuzzer 67154 265428 75684 0 3 0x4000082 thrsleep syz-fuzzer 67154 309668 75684 0 3 0x4000082 wait syz-fuzzer 67154 336368 75684 0 3 0x4000082 thrsleep syz-fuzzer 75684 473629 57175 0 3 0x10008a sigsusp ksh 57175 98845 3701 0 3 0x9a kqread sshd 42657 108693 1 0 3 0x100083 ttyin getty 3701 182453 1 0 3 0x88 kqread sshd 66467 159134 6483 73 3 0x1100090 kqread syslogd 6483 371257 1 0 3 0x100082 netio syslogd 57659 54706 1 0 3 0x100080 kqread resolvd 9945 501444 88352 77 3 0x100092 kqread dhcpleased 13774 212591 88352 77 3 0x100092 kqread dhcpleased 88352 225220 1 0 3 0x80 kqread dhcpleased 82920 392182 0 0 3 0x14200 bored smr 33231 145496 0 0 2 0x14200 zerothread 65082 360727 0 0 3 0x14200 aiodoned aiodoned 19805 164781 0 0 3 0x14200 syncer update 38609 47748 0 0 3 0x14200 cleaner cleaner 25170 77408 0 0 7 0x14200 reaper 87362 83864 0 0 3 0x14200 pgdaemon pagedaemon 15643 233686 0 0 3 0x14200 bored viomb 28108 35491 0 0 3 0x40014200 acpi0 acpi0 45837 242291 0 0 3 0x40014200 idle1 10210 13159 0 0 3 0x14200 bored softnet 50804 147123 0 0 3 0x14200 bored softnet 80617 321322 0 0 3 0x14200 bored softnet 97370 244407 0 0 2 0x14200 softnet 73482 84109 0 0 3 0x14200 bored systqmp 54605 372078 0 0 3 0x14200 bored systq 85564 90916 0 0 2 0x40014200 softclock 61678 343311 0 0 3 0x40014200 idle0 1 3508 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex fdescpl r = 0 (0xffffffff82cad118) #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:579 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1106 #5 process_new+0x2bc sys/kern/kern_fork.c:255 #6 fork1+0x30b sys/kern/kern_fork.c:379 #7 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #7 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #8 Xsyscall+0x128 Process 66776 (syz-executor.0) thread 0xffff800022cdd340 (171582) exclusive rwlock sysctllk r = 0 (0xffffffff82bd4730) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 sys_sysctl+0x1b3 sys/kern/kern_sysctl.c:234 #3 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #3 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #4 Xsyscall+0x128 Process 16325 (syz-executor.5) thread 0xffff8000211e8b08 (365835) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82cacb98) #0 witness_lock+0x44d #1 syscall+0x53d mi_syscall sys/sys/syscall_mi.h:112 [inline] #1 syscall+0x53d sys/arch/amd64/amd64/trap.c:626 #2 Xsyscall+0x128 exclusive mutex fdescpl r = 0 (0xffffffff82cad118) #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:579 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1106 #5 process_new+0x2bc sys/kern/kern_fork.c:255 #6 fork1+0x30b sys/kern/kern_fork.c:379 #7 syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] #7 syscall+0x555 sys/arch/amd64/amd64/trap.c:626 #8 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10204 6410K 6421K 78643K 11297 0 pcb 13 10K 12K 78643K 15 0 rtable 236 6K 7K 78643K 467 0 ifaddr 73 24K 24K 78643K 81 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 62 0 ioctlops 0 0K 2K 78643K 34 0 iov 0 0K 28K 78643K 293 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 1371 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 25 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 435 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 24 89K 117K 78643K 1191 0 sigio 0 0K 0K 78643K 5 0 proc 56 78K 103K 78643K 601 0 subproc 104 6K 6K 78643K 117 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 76 0 in_multi 99 6K 6K 78643K 125 0 ether_multi 1 0K 0K 78643K 7 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 97 440K 440K 78643K 97 0 exec 0 0K 1K 78643K 715 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 64K 78643K 10 0 UVM amap 300 82K 83K 78643K 10050 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 43 0 NDP 11 0K 2K 78643K 30 0 temp 125 5779K 5842K 78643K 6671 0 kqueue 13 20K 24K 78643K 123 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 194 0 191 3 2 1 3 0 8 0 rtentry 112 126 0 15 4 0 4 4 0 8 0 unpcb 144 3953 0 3931 14 8 6 10 0 8 5 syncache 296 22 0 22 3 2 1 1 0 8 1 tcpqe 32 362 0 362 3 2 1 1 0 8 1 tcpcb 776 813 0 809 14 6 8 8 0 8 7 arp 120 20 0 2 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 368 1571 0 1563 17 7 10 10 0 8 9 nd6 48 31 0 6 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 520 0 60 29 0 29 29 0 8 0 art_table 32 521 0 60 4 0 4 4 0 8 0 art_node 16 125 0 24 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 433 0 423 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 2786 0 1354 90 0 90 90 0 8 0 ffsino 272 2786 0 1354 96 0 96 96 0 8 0 nchpl 144 4441 0 2808 63 0 63 63 0 8 0 uvmvnodes 80 2912 0 0 60 0 60 60 0 8 0 vnodes 216 2912 0 0 162 0 162 162 0 8 0 namei 1024 15743 0 15743 2 1 1 2 0 8 1 percpumem 16 44 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 15580 0 15580 12 9 3 8 0 8 3 plimitpl 152 146 0 123 3 1 2 2 0 8 1 sigapl 424 1478 0 1424 7 0 7 7 0 8 0 futexpl 64 10837 0 10834 1 0 1 1 0 8 0 knotepl 120 540 0 0 16 0 16 16 0 8 0 kqueuepl 216 281 0 271 5 0 5 5 0 8 4 pipepl 320 432 0 404 12 8 4 8 0 8 1 fdescpl 496 1460 0 1425 6 1 5 6 0 8 0 pool(0xffffffff82cad108:fdescpl): page inconsistency: page 0xfffffd8067e02000; 0 on list, 7 missing, 8 items per page filepl 152 12488 0 12240 29 12 17 19 0 8 5 lockfpl 104 100 0 98 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 24 0 8 1 0 1 1 0 8 0 pgrppl 48 64 0 48 1 0 1 1 0 8 0 ucredpl 104 885 0 867 1 0 1 1 0 8 0 zombiepl 144 1425 0 1424 1 0 1 1 0 8 0 processpl 1072 1479 0 1424 4 0 4 4 0 8 0 procpl 696 3717 0 3642 9 1 8 9 0 8 0 sosppl 168 12 0 12 2 1 1 1 0 8 1 sockpl 488 5724 0 5689 120 104 16 34 0 8 10 mcl64k 65536 19 0 0 3 0 3 3 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 0 2 0 2 2 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 317 0 0 39 0 39 39 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 3605 0 0 224 0 224 224 0 8 0 bufpl 288 6444 0 140 451 0 451 451 0 8 0 anonpl 24 333199 0 319836 108 14 94 100 0 186 1 amapchunkpl 152 27717 0 27026 31 0 31 31 0 158 2 amappl16 200 4522 0 4128 33 6 27 27 0 8 5 amappl15 192 24 0 21 1 0 1 1 0 8 0 amappl14 184 143 0 129 1 0 1 1 0 8 0 amappl13 176 11 0 11 2 2 0 1 0 8 0 amappl12 168 416 0 413 1 0 1 1 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl10 152 44 0 32 1 0 1 1 0 8 0 amappl9 144 968 0 966 1 0 1 1 0 8 0 amappl8 136 188 0 135 2 0 2 2 0 8 0 amappl7 128 159 0 133 2 0 2 2 0 8 0 amappl6 120 173 0 161 2 1 1 2 0 8 0 amappl5 112 153 0 147 1 0 1 1 0 8 0 amappl4 104 496 0 471 2 1 1 2 0 8 0 amappl3 96 3929 0 3875 2 0 2 2 0 8 0 amappl2 88 1845 0 1769 3 1 2 3 0 8 0 amappl1 80 35662 0 34898 25 7 18 22 0 8 0 amappl 88 9540 0 9346 7 1 6 6 0 92 1 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 1460 0 1425 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1460 0 1425 1 0 1 1 0 8 0 vmmpekpl 168 17296 0 17242 3 0 3 3 0 8 0 vmmpepl 168 141820 0 138977 144 10 134 139 0 357 1 vmsppl 368 1459 0 1424 4 0 4 4 0 8 0 rwobjpl 56 43200 0 38660 69 2 67 67 0 8 0 pdppl 4096 2927 0 2848 127 46 81 91 0 8 2 pvpl 32 690208 0 670369 269 48 221 269 0 265 43 pmappl 248 1459 0 1424 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1096 0 56 30 0 30 30 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82b6bff0) 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(ffffffff82cac990) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cac990) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211c9090,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd807e136e70) at uvm_map_teardown+0x28d sys/uvm/uvm_map.c:2598 uvmspace_free(fffffd807e136e70) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3513 reaper(ffff8000211bc830) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff82b6bff0) 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(ffffffff82cac990) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cac990) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff8000211c9090,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1382 uvm_map_teardown(fffffd807e136e70) at uvm_map_teardown+0x28d sys/uvm/uvm_map.c:2598 uvmspace_free(fffffd807e136e70) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3513 reaper(ffff8000211bc830) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827b427e) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82cad108,9,ffff800027b93368) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82cad108,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff50d8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff50d8) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff8000211e8598,ffff8000ffff50d8,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000211e8b08,1,ffffffff818b0a90,0,ffff800027b935b0,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800027b93630) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800027b93630) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc18d0, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827b427e) at panic+0x177 sys/kern/subr_prf.c:198 pool_do_get(ffffffff82cad108,9,ffff800027b93368) at pool_do_get+0x474 sys/kern/subr_pool.c:739 pool_get(ffffffff82cad108,9) at pool_get+0xe9 sys/kern/subr_pool.c:582 fdcopy(ffff8000ffff50d8) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1067 [inline] fdcopy(ffff8000ffff50d8) at fdcopy+0x44 sys/kern/kern_descrip.c:1106 process_new(ffff8000211e8598,ffff8000ffff50d8,1) at process_new+0x2bc sys/kern/kern_fork.c:255 fork1(ffff8000211e8b08,1,ffffffff818b0a90,0,ffff800027b935b0,0) at fork1+0x30b sys/kern/kern_fork.c:379 syscall(ffff800027b93630) at syscall+0x555 mi_syscall sys/sys/syscall_mi.h:113 [inline] syscall(ffff800027b93630) at syscall+0x555 sys/arch/amd64/amd64/trap.c:626 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc18d0, count: -9