panic: pool_do_put: shmpl: double pool_put: 0xfffffd80628c99a0 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *334747 55367 0 0 0x4000000 1 syz-executor 124813 33124 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83078475) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83592ad0,fffffd80628c99a0) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83592ad0,fffffd80628c99a0) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff800037296730) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037296730) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x11b757a9570, count: 8 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_put: shmpl: double pool_put: 0xfffffd80628c99a0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83078475) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83592ad0,fffffd80628c99a0) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83592ad0,fffffd80628c99a0) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff800037296730) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037296730) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x11b757a9570, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800037296460 rbx 0xffff800029b7cdbf rdx 0 rcx 0xffff8000371e3478 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x51c2d3f5dd0f3932 r11 0x455b41a3fac9dd74 r12 0xffff800029b7cbc0 r13 0 r14 0 r15 0x1 rip 0xffffffff81a2e725 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037296450 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=334747 pid=55367 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000371e3988,0xffffffff835e0e78 process=0xffff8000ffff16a8 user=0xffff800037291000, vmspace=0xfffffd806a9ad8a0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 55367 53156 61056 0 3 0x80 fsleep syz-executor 55367 451299 61056 0 3 0x4000080 fsleep syz-executor *55367 334747 61056 0 7 0x4000000 syz-executor 88389 183784 52779 0 3 0x80 fsleep syz-executor 88389 488497 52779 0 3 0x4000080 pipewr syz-executor 90462 21279 74609 0 3 0x80 fsleep syz-executor 90462 142881 74609 0 3 0x4000080 sbwait syz-executor 25695 438493 79014 0 3 0x80 fsleep syz-executor 25695 489424 79014 0 3 0x4000080 lockf syz-executor 95905 273453 10965 0 3 0x80 fsleep syz-executor 95905 245778 10965 0 3 0x4000080 sbwait syz-executor 86841 130256 4960 0 3 0x80 fsleep syz-executor 86841 331743 4960 0 3 0x4000080 kqread syz-executor 86841 90565 4960 0 3 0x4000080 fsleep syz-executor 11379 442434 0 0 3 0x14200 acct acct 25398 129616 95049 0 3 0x80 fsleep syz-executor 25398 420064 95049 0 3 0x4000080 msgwait syz-executor 32543 382151 0 0 3 0x14200 bored sosplice 6075 149641 0 0 3 0x14280 nfsidl nfsio 88814 329862 0 0 3 0x14280 nfsidl nfsio 85844 279808 0 0 3 0x14280 nfsidl nfsio 34231 133974 0 0 3 0x14280 nfsidl nfsio 72119 49460 0 0 3 0x14280 nfsidl nfsio 14082 264815 0 0 3 0x14280 nfsidl nfsio 14731 243678 0 0 3 0x14280 nfsidl nfsio 70867 264609 0 0 3 0x14280 nfsidl nfsio 24285 296204 0 0 3 0x14280 nfsidl nfsio 58997 327970 0 0 3 0x14280 nfsidl nfsio 8194 436607 0 0 3 0x14280 nfsidl nfsio 62652 376242 0 0 3 0x14280 nfsidl nfsio 70893 100531 0 0 3 0x14280 nfsidl nfsio 56575 196407 0 0 3 0x14280 nfsidl nfsio 82728 505683 0 0 3 0x14280 nfsidl nfsio 46865 460539 0 0 3 0x14280 nfsidl nfsio 8719 92157 0 0 3 0x14280 nfsidl nfsio 75957 106610 0 0 3 0x14280 nfsidl nfsio 4285 172045 0 0 3 0x14280 nfsidl nfsio 57109 143041 0 0 3 0x14280 nfsidl nfsio 41381 258155 10751 0 3 0x82 netio sshd-session 69147 30802 84243 0 3 0x100082 sbwait arp 84243 56002 94926 0 3 0x10008a sigsusp sh 94926 130148 38536 0 3 0x82 wait syz-executor 79014 206615 38536 0 2 0x482 syz-executor 10965 150776 38536 0 3 0x82 nanoslp syz-executor 4960 276624 38536 0 2 0x482 syz-executor 95049 295028 38536 0 3 0x82 nanoslp syz-executor 74609 487365 38536 0 2 0x482 syz-executor 61056 392108 38536 0 2 0x482 syz-executor 52779 193221 38536 0 2 0x482 syz-executor 38536 404886 55957 0 3 0x82 kqread syz-executor 55957 113625 86288 0 3 0x10008a sigsusp ksh 86288 277504 26087 0 3 0x98 kqread sshd-session 26087 468073 10751 0 3 0x92 kqread sshd-session 76744 166425 1 0 3 0x100083 ttyin getty 10751 302693 1 0 3 0x88 kqread sshd 62355 18940 63184 74 3 0x1100092 bpf pflogd 63184 61190 1 0 3 0x80 sbwait pflogd 92230 514969 80277 73 3 0x1100090 kqread syslogd 80277 156619 1 0 3 0x100082 sbwait syslogd 94298 321117 1 0 3 0x100080 kqread resolvd 1007 471058 88126 77 3 0x100092 kqread dhcpleased 7665 324426 88126 77 3 0x100092 kqread dhcpleased 88126 201071 1 0 3 0x80 kqread dhcpleased 46158 15297 0 0 3 0x14200 bored smr 84266 319970 0 0 3 0x14200 pgzero zerothread 13217 219107 0 0 3 0x14200 aiodoned aiodoned 89246 459695 0 0 3 0x14200 syncer update 73479 490535 0 0 3 0x14200 cleaner cleaner 52310 168026 0 0 3 0x14200 reaper reaper 14076 250651 0 0 3 0x14200 pgdaemon pagedaemon 21727 251946 0 0 3 0x14200 bored viomb 56604 198918 0 0 3 0x40014200 acpi0 acpi0 68472 251886 0 0 3 0x40014200 idle1 43932 339048 0 0 3 0x14200 bored softnet3 40667 5057 0 0 3 0x14200 bored softnet2 41640 499722 0 0 3 0x14200 bored softnet1 20582 61641 0 0 3 0x14200 bored softnet0 92519 172165 0 0 3 0x14200 bored systqmp 28916 55721 0 0 3 0x14200 bored systq 6029 241616 0 0 3 0x14200 tmoslp softclockmp 33124 124813 0 0 7 0x40014200 softclock 94820 401121 0 0 3 0x40014200 idle0 1 30706 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex shmpl r = 0 (0xffffffff83592ae0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0x9f sys/kern/subr_pool.c:797 #4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] #4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 Process 55367 (syz-executor) thread 0xffff8000371e3988 (451299) exclusive rwlock futex r = 0 (0xffffffff834a7f60) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 55367 (syz-executor) thread 0xffff8000371e3478 (334747) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8350d530) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 sleep_finish+0x21e sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 vm_map_lock_ln+0x143 sys/uvm/uvm_map.c:5252 #6 uvm_unmap+0x81 sys/uvm/uvm_map.c:1792 #7 shm_delete_mapping+0xa0 sys/kern/sysv_shm.c:170 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83592ae0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0x9f sys/kern/subr_pool.c:797 #4 shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] #4 shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 #5 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10197 11249K 11511K 166960K 11688 0 pcb 17 13K 13K 166960K 67 0 rtable 209 6K 7K 166960K 369 0 pf 34 17K 20K 166960K 69 0 ifaddr 41 7K 7K 166960K 55 0 ifgroup 55 2K 2K 166960K 76 0 counters 64 36K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1499 0 iov 0 0K 18K 166960K 31 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1465 92K 92K 166960K 1865 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 19 69K 89K 166960K 400 0 sigio 0 0K 0K 166960K 7 0 proc 72 91K 128K 166960K 557 0 subproc 104 6K 6K 166960K 105 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 19 0 in_multi 81 6K 6K 166960K 91 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 406 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 254 73K 87K 166960K 5266 0 UVM aobj 9 2K 2K 166960K 12 0 pinsyscall 47 94K 103K 166960K 1475 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 12 0 NDP 12 0K 1K 166960K 34 0 temp 42 6811K 7067K 166960K 18064 0 kqueue 13 20K 28K 166960K 61 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 115 0 111 2 0 2 2 0 8 1 rtentry 112 112 0 16 4 0 4 4 0 8 0 unpcb 144 431 0 410 8 6 2 8 0 8 1 syncache 336 6 0 6 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 181 0 174 8 3 5 8 0 8 4 arp 120 21 0 1 1 0 1 1 0 8 0 inpcb 336 487 0 474 7 0 7 7 0 8 5 nd6 136 22 0 4 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 6 0 6 1 0 1 1 0 8 1 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 41 0 3 1 0 1 1 0 8 0 pfstkey 128 41 0 3 2 0 2 2 0 8 0 pfstate 376 41 0 3 4 0 4 4 0 8 0 pfrule 1344 23 0 17 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 434 0 39 27 0 27 27 0 8 0 art_table 32 435 0 39 4 0 4 4 0 8 0 art_node 16 111 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 72 0 67 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 11 0 1 1 0 1 1 0 8 0 shmpl 112 9 0 3 1 0 1 1 0 8 0 pool(shmpl): free list modified: page 0xfffffd80628c9000; item ordinal 0; addr 0xfffffd80628c99a0 (p 0xfffffd80628c9000); offset 0x1c=0xdeafbeac dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2168 0 665 95 0 95 95 0 8 0 ffsino 272 2168 0 665 102 0 102 102 0 8 1 nchpl 144 2714 0 1034 63 0 63 63 0 8 0 uvmvnodes 80 2554 0 0 53 0 53 53 0 8 0 vnodes 216 2554 0 0 142 0 142 142 0 8 0 namei 1024 9267 0 9267 2 1 1 2 0 8 1 percpumem 16 54 0 8 1 0 1 1 0 8 0 kstatmem 264 40 0 16 3 0 3 3 0 8 1 scxspl 216 7817 0 7817 11 3 8 8 1 8 8 plimitpl 152 161 0 144 1 0 1 1 0 8 0 sigapl 424 724 0 650 9 0 9 9 0 8 0 futexpl 64 5972 0 5963 1 0 1 1 0 8 0 knotepl 120 325 0 0 10 0 10 10 0 8 0 kqueuepl 216 155 0 142 5 0 5 5 0 8 4 pipepl 320 134 0 105 3 0 3 3 0 8 0 fdescpl 496 683 0 649 5 0 5 5 0 8 0 filepl 152 4551 0 4259 18 2 16 18 0 8 3 lockfpl 104 220 0 216 2 0 2 2 0 8 1 lockfspl 48 107 0 104 1 0 1 1 0 8 0 sessionpl 144 25 0 15 1 0 1 1 0 8 0 pgrppl 48 37 0 19 1 0 1 1 0 8 0 ucredpl 104 787 0 774 1 0 1 1 0 8 0 zombiepl 144 650 0 650 1 0 1 1 0 8 1 processpl 1160 724 0 650 6 0 6 6 0 8 0 procpl 648 1178 0 1095 8 0 8 8 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 664 1041 0 1004 20 11 9 20 0 8 5 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 143 0 0 18 0 18 18 0 8 0 mcl2k 2048 33 0 0 4 0 4 4 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 13 0 13 13 0 8 0 bufpl 280 2741 0 97 189 0 189 189 0 8 0 anonpl 24 178859 0 175104 37 5 32 35 0 185 8 amapchunkpl 152 17417 0 16892 28 0 28 28 0 158 7 amappl16 200 4783 0 4759 6 4 2 5 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 147 0 133 1 0 1 1 0 8 0 amappl13 176 42 0 42 2 2 0 1 0 8 0 amappl12 168 1334 0 1299 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 156 0 155 1 0 1 1 0 8 0 amappl8 136 23 0 21 1 0 1 1 0 8 0 amappl7 128 112 0 98 1 0 1 1 0 8 0 amappl6 120 162 0 160 1 0 1 1 0 8 0 amappl5 112 152 0 139 1 0 1 1 0 8 0 amappl4 104 342 0 322 1 0 1 1 0 8 0 amappl3 96 3172 0 3067 3 0 3 3 0 8 0 amappl2 88 988 0 891 3 0 3 3 0 8 0 amappl1 80 8871 0 8191 16 0 16 16 0 8 1 amappl 88 4864 0 4682 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 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 11 0 3 1 0 1 1 0 8 0 pool(aobjpl): free list modified: page 0xfffffd80709f7000; item ordinal 0; addr 0xfffffd80709f7c18 (p 0xfffffd80709f7000); offset 0xc=0xdeaf4151 uaddrrnd 24 683 0 649 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 683 0 649 1 0 1 1 0 8 0 vmmpekpl 168 7110 0 7064 3 0 3 3 0 8 0 vmmpepl 168 51157 0 49089 96 0 96 96 0 357 2 vmsppl 440 682 0 649 6 1 5 5 0 8 0 rwobjpl 56 21102 0 17463 53 0 53 53 0 8 1 pdppl 4096 1373 0 1298 101 24 77 83 0 8 2 pvpl 32 12478 0 0 101 0 101 101 0 265 0 pmappl 248 682 0 649 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 390 0 31 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834afff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164 __mp_acquire_count(ffffffff8350d328,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x21e sys/kern/kern_synch.c:416 msleep(ffffffff83549f10,ffffffff83489470,0,ffffffff830e65fb,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000fffff440) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff834afff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:164 __mp_acquire_count(ffffffff8350d328,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x21e sys/kern/kern_synch.c:416 msleep(ffffffff83549f10,ffffffff83489470,0,ffffffff830e65fb,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000fffff440) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83078475) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83592ad0,fffffd80628c99a0) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83592ad0,fffffd80628c99a0) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff800037296730) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037296730) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x11b757a9570, count: 8 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83078475) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_put(ffffffff83592ad0,fffffd80628c99a0) at pool_do_put+0x1be sys/kern/subr_pool.c:841 pool_put(ffffffff83592ad0,fffffd80628c99a0) at pool_put+0xb3 sys/kern/subr_pool.c:799 shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac shm_deallocate_segment sys/kern/sysv_shm.c:153 [inline] shm_delete_mapping(fffffd806a9ad8a0,ffff8000012a8008) at shm_delete_mapping+0x1ac sys/kern/sysv_shm.c:174 syscall(ffff800037296730) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800037296730) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x11b757a9570, count: -7